Skip to Content
Exit

A Guide to Valve Actuators

Author Archives: RWVC

  1. A Guide to Valve Actuators

    Comments Off on A Guide to Valve Actuators

    At RED-WHITE VALVE CORP., we are a premier supplier of valves and related products for the plumbing, commercial, industrial, and HVAC markets. One of our core product offerings is valve actuators, which are used to facilitate valve operation in fluid handling systems across a wide range of industries and applications. Our experts have put together the following guide on these important devices to help readers understand what they are, what they do, what types are available, and how to select the right one for their needs.

    What Are Valve Actuators?

    A valve actuator is a mechanical device that moves the valve’s closure element to open and close its flow passages as needed. It can be operated manually by a human worker or automatically by an outside power source (e.g., electricity, compressed air, or compressed hydraulic fluid). Depending on its design, it can be used for on-off flow applications and/or throttling flow applications.

    Types of Valve Actuators & Actuation Methods
    Click to Zoom

    What Do Valve Actuators Do?

    Regardless of the method of actuation, all valve actuators must perform a number of basic functions, including the following:

    • Move the closure element: The closure element refers to the component (e.g., the ball, disc, or plug) used to partially or completely block the flow of fluid through the valve. The valve’s actuator must be able to provide the force necessary to move and position the closure element as needed, even under demanding process conditions.
    • Maintain the closure element position: In addition to moving the closure element, the actuator must be able to keep it in the desired position. It may use a spring, fluid power, or mechanical stiffness for this purpose, depending on its type.
    • Seat the valve with sufficient torque: The actuator must generate and maintain enough torque to hold the valve in the closed position during shutoff operations.
    • Have a failure mode: In the event of power failure, the actuator should have an appropriate failure mode (e.g., as-is, fully closed, fully open) to ensure the system does not experience excessive damage.
    • Provide proper rotational capabilities: Actuators must be able to accommodate the rotational capacities (generally 90 or 180 degrees) of their valves.
    • Operate at the appropriate speed: Special control circuit elements can be used to regulate the cycle speed of a valve actuator. For fast cycle speeds that fall below half of the standard actuator cycle time, it is important to carefully select the valve to avoid shock-related damage to its parts.

    Types of Valve Actuators / Actuation Methods

    Valve actuators come in a variety of designs and configurations, each of which offers unique benefits and limitations that make it suitable for different applications. Understanding the distinctions between the various types is essential to selecting the right one for a particular use case. Below, we highlight three of the most common types of valve actuators.

    Manual Valve Actuators

    Manual valve actuators use hand-operated levers or wheels that engage a series of gears to open or close the valve. While they tend to be low in cost and simple to use, manual valve actuators are limited to applications in which automated or remote valve control is not required.

    The types of manual valve actuators available include:

    • Basic levers: Basic lever actuators consist of a long handle that attaches to the valve stem to enable valve rotation.
    • Handwheels: Handwheel actuators consist of a large handwheel and gearbox, the latter of which increases the mechanical advantage. They are commonly used in larger valves that need higher amounts of torque to operate.
    • Manual valves with limit switches: Manual valves can be equipped with limit switches to convey the position of the valve to the control system.

    Hovercraft Pneumatic ActuatorPneumatic Valve Actuators

    Pneumatic valve actuators provide automatic or semi-automatic valve operation by converting the energy from compressed air into mechanical motion. They work by containing the air within a chamber and allowing it to expand, which creates a difference in pressure between the inside and outside of the chamber. The pressure differential energizes the air. It can then be directed out of the chamber toward the mechanical component used to open and close the valve.

    The types of pneumatic valve actuators available include:

    • Rotary pneumatic valve actuators: Rotary pneumatic valve actuators convert the energy from compressed air into rotational motion to operate rotary valves (e.g., ball, butterfly, and plug valves). They can be classified into two main categories—rack & pinion actuators and Scotch yoke actuators.
    • Linear pneumatic valve actuators: Linear pneumatic valve actuators convert the energy from compressed air into linear motion to operate linear valves (e.g., gate and globe valves). They can be classified into two main categories—diaphragm actuators and cylinder actuators.

    Cutter-MODElectric Valve Actuators

    Electric valve actuators use an alternating current (AC) or direct current (DC) motor to generate the torque required for valve operation. The motor is attached to the valve stem through a series of gears and controlled by a cam-activated limit switch. Together, these components allow for accurate and precise adjustment of the valve.

    The types of electric valve actuators available include:

    • Rotary electric valve actuators: Rotary electric valve actuators convert electric energy into rotary motion for the operation of rotary valves.
    • Linear electric valve actuators: Linear electric valve actuators convert electric energy into linear motion for the operation of linear valves.

    How to Select the Right Valve Actuator

    Given the broad selection of valve actuators available, it is important to carefully research your options, so you select the one that is best for your needs. Some factors to keep in mind when evaluating whether a particular product is right for your application include:

    • Power source availability: Does your facility have the necessary power source to operate the actuator? If you choose to use a powered valve actuator, your facility must be equipped with the appropriate power source. For example, electric actuators need an electric motor, while pneumatic actuators need a compressed air supply.
    • Automation requirements: Do you want to automate valve functions? Automation allows you to monitor and control valves without having to be physically near them. While manual actuators do not accommodate automation, powered actuators do.
    • Application conditions: What conditions will the actuator face within the application? Regarding temperature, pneumatic actuators are suitable for use in temperatures ranging from -4–150° F, while electric actuators can operate in temperatures ranging from -40–150° F. Regarding hazardous environments, pneumatic actuators are the preferred choice since they are explosion-proof. However, electric actuators can be used if they have an appropriate NEMA-rated enclosure.
    • Emissions: Are you trying to minimize your facility’s emissions? Pneumatic actuators emit various levels of methane gas into the atmosphere as they operate, creating a challenge for highly regulated industries that must keep their emissions low. Electric actuators provide a zero-emissions alternative to pneumatic designs, allowing companies to comply with increasingly strict environmental regulations.
    • Cost: How much are you willing to pay for your actuator? Both manual and pneumatic actuators have lower upfront costs compared with electric designs. However, the higher efficiency and reduced emissions of electric actuators can provide significant long-term cost benefits in the right applications.

    Quality Valve Actuators From RED-WHITE VALVE CORP.

    Valve actuators play a vital role in fluid handling systems. That’s why it is important to source them from a reliable supplier. For valve actuators you can trust in your most critical applications, turn to the experts at RED-WHITE VALVE CORP. As valve technology leaders, we have the knowledge and skills to design and manufacture valve products, including actuators, that meet some of the strictest performance and quality standards. To learn more about our valve actuators, contact us today.

  2. A Guide to PEX Valves

    Comments Off on A Guide to PEX Valves

    The term “PEX” is an acronym for cross-linked polyethylene. The material is used for a variety of industrial components, such as tubes and pipes for valves.

    What Are PEX Valves?

    PEX valves are highly similar to regular valves. The main difference between them is how they are connected; PEX valves can connect with PEX tubing and piping (i.e., tubing and piping made from PEX) without needing transition adapters. Typical applications for these components include shut-off, maintenance, and repair operations.

    PEX Valve Tubing/Piping Material

    There are three methods of producing cross-linked polyethylene. The resulting materials are designated as PEX A, PEX B, and PEX C. Each material is processed with different techniques and/or technologies, resulting in unique material characteristics depending on the method used. The differences in properties make each material suitable for different components and applications.

    • PEX A. This material is cross-linked using the “Engel” process, which involves introducing peroxides to the polyethylene material before it undergoes the forming process.
    • PEX B. This material is cross-linked using the silane process, which is also called steam or moisture cross-linking. The process is performed on the polyethylene after it undergoes the forming process.
    • PEX C. This material is cross-linked by subjecting it to an electron beam or gamma radiation. The process is the least commonly used of the three cross-linking methods.

    PEX Valve Connection Types

    Valves, tubes/pipes, and fittings can be connected in a variety of ways, depending on their design. PEX valves from RED-WHITE VALVE CORP. are available with the following connection types:

    F-1807

    These connections are manufactured according to the ASTM F1807 standard. The process of installing valves with them requires an appropriate crimp ring and PEX tube/pipe and involves the following steps:

    1. Sliding the crimp ring over the end of the tubing/piping
    2. If installing a tailpiece, mounting the union nut over the tailpiece before connecting it to the tube/pipe
    3. Inserting the valve into the end of the tubing/piping until it stops
    4. Positioning the crimp ring between 1/8 to 1/4 inch away from the end of the tubing/piping and over the ribs of the valve
    5. Crimping the crimp ring with a crimping tool
    6. Checking the crimp was made properly with a gauge5004AB

    F-1960

    These connections are manufactured according to the ASTM F1960 standard. The process of installing valves with them requires an appropriate ring and PEX tube/pipe and involves the following steps:

    1. Inserting the ring onto the PEX tube/pipe
    2. If installing a tailpiece, mounting the union nut over the tailpiece before connecting it to the pipe
    3. Expanding the PEX tubing/piping and ring with an expander tool
    4. Inserting the expanded assembly onto the PEX valve5014AB

    EVERLOC+

    These connections are manufactured according to the REHAU EVERLOC+® patented system. Valves with EVERLOC+® compression-sleeve connections require EVERLOC+® PEXa compression sleeves and REHAU PEXa tubes/pipes for installation. Installation of the components should only be performed with EVERLOC+® compression-sleeve tools.

    5414AB

    Why Should I Use PEX Valves for My Application?

    Why Should I Use PEX Valves for My Application
    Click to Zoom
    Valves are used in a wide range of applications across nearly every industry. Since they are often utilized in critical applications where failure can have catastrophic consequences, it is essential to choose the right type for the given use case. Below, we highlight some of the factors you should consider when vetting your valve options.

    • Cost. Cost is a big factor in nearly every purchase. You need to pick a product that meets your application requirements without surpassing your budget restrictions. Because PEX valves do not require an adapter to connect to the PEX tubing they are generally more cost effective and eliminate leak points.
    • Environment. The environment within an application plays a big role in how a product performs. Regarding valves, key environmental conditions include chemicals and temperatures. PEX valve assemblies should be manufactured using dezincification resistant (DZR) brass.
    • Installation timeline. The amount of time a component takes to install affects labor costs. Since PEX valves can attach to PEX tubing/piping without transfer adapters, they are much easier and, consequently, faster to install than other valves.

    If you’ve decided that you want to use PEX valve assembly for your application, you need to think about what type of tubing/piping you want to use: PEX A, PEX B, or PEX C. Some of the considerations you should keep in mind when making the selection are:

    • PEX A materials offer the greatest flexibility and kink resistance.
    • PEX B materials are the least flexible and kink resistant.
    • PEX C materials are not as commonly available as PEX A and PEX B materials.

    PEX Valves at RED-WHITE VALVE CORP.

    Want more information on PEX valves? Ask the experts at RED-WHITE VALVE CORP. We supply high-quality valves, including PEX valves, to customers in various markets. Our team can answer or address any questions or concerns you may have about these products.

    If you want to purchase PEX valves for your operations, we’ve got you covered. We offer a range of PEX valves:

    • Ball valves
    • Transition ball valves
    • Ball valves with drains
    • Ball valves with mounting feet
    • Ball valves with drains and mounting feet
    • Flange ball valves

    To learn more about our PEX valve offerings, check out our PEX valve catalog or contact us today.

  3. An Introduction to Pneumatic Actuators

    Comments Off on An Introduction to Pneumatic Actuators

    What Is a Pneumatic Actuator?

    Actuators convert potential energy into kinetic energy (i.e., mechanical motion) when prompted by a control signal. They are integrated into a variety of devices and systems to perform various tasks. There are many types available, each of which is suitable for different applications. One way of categorizing them is by their power source (i.e., what form of energy they use to produce mechanical motion).

    Pneumatic actuators—also referred to as pneumatic cylinders, air cylinders, and air actuators—rely on compressed air for their operation. While all pneumatic actuators have the same basic components (a cylinder, ports or valves, and a mechanical element), they can vary in design; for example, rotary actuators convert energy into rotary motion, while linear actuators convert energy into linear motion.Hovercraft Pneumatic Actuator

    Typical applications for pneumatic actuators include:

    • Aircraft
    • Automobiles
    • Packaging and production equipment
    • Pump systems
    • Trains

    How Does a Pneumatic Actuator Work?

    As mentioned above, a pneumatic actuator uses compressed air to produce mechanical motion. It does this by containing regular air, pressurized gas, or a combination of the two within a chamber and allowing it to expand. As the air/gas expands, it creates a pressure differential between the inside of the chamber and the surrounding environment, which energizes the air/gas. The air/gas is then directed out of the chamber toward a mechanical component (e.g., gear or piston), which actually performs the task.

    Advantages of Pneumatic Actuators

    Compared to other types of actuators, pneumatic valves offer a number of advantages.

    • They have a simple design, which makes them easy and, consequently, cheaper to produce.
    • They are highly durable and easy to maintain, resulting in lower replacement and repair costs.
    • They do not require electricity or ignition to operate, making them suitable for use in environments where combustion is a concern.
    • They can generate greater forces than electric actuators, which makes them better suited for handling heavier loads.

    Types of Pneumatic Actuators

    Pneumatic actuators can be classified according to a variety of design factors. For example, they can be categorized into three main varieties based on what type of mechanical motion they produce: linear, rotary, and combination.

    Linear Actuators

    Linear actuators are designed to produce linear motion. They use various mechanisms to perform this function, such as pistons and diaphragms. In piston-style linear actuators, the stroke length is dependent on the length of the cylinder. In diaphragm-style linear actuators, the stroke length is dependent on the stretch tolerance of the diaphragm.

    Piston-style linear actuators can be further classified into single-acting actuators and double-acting actuators. Single-acting actuators rely on air pressure to move the piston in one direction and a spring to move it back to the original location. Double-acting actuators rely on air pressure to move the piston forward and back. The former has a simpler design, a smaller footprint, and lower compressed air requirements. The latter offers greater force capacities, faster operating speeds, and longer lifespans.

    Rotary Actuators

    Rotary actuators are designed to produce rotary motion. Similar to linear actuators, they use a variety of mechanisms to perform this function. Some of the most commonly used are pistons, diaphragms, yokes, vanes. Piston-style rotary actuators offer a limited range of rotation, yoke-style rotary actuators offer up to 90 degrees of rotation, and vane-style rotary actuators offer up to and exceeding 360 degrees of rotation.

    Combination Actuators

    Combination actuators are designed to produce both linear motion and a limited degree of rotary motion. They are commonly used in work holding applications, where they are used for clamps that must be constantly engaged, disengaged, and reengaged to switch out workpieces.

    Pneumatic Actuators From RED-WHITE VALVE CORP.

    Pneumatic actuators play a vital role in many different devices and systems (e.g., in valve systems, they open and close the valve to start and stop the flow of fluid). Given their importance, it is essential to source them from a reliable supplier. Otherwise, they may underperform or fail, which can lead to loss of productivity and profitability.

    Need pneumatic actuators you can trust in your critical valve applications? The experts at RED-WHITE VALVE CORP. have got you covered! We offer high-quality pneumatic actuators for valve assemblies used in industrial and commercial applications. To learn more about our product offerings, contact us today.

  4. What is a Gas Ball Valve?

    Comments Off on What is a Gas Ball Valve?

    Valves come in a wide array of types to control the flow of liquids and gases within a system. Industries rely on numerous valves in applications ranging from chemical process systems to plumbing, with some of the most common valve types including:

    In their most general process and piping system applications, the above valves may perform numerous functions, such as starting or stopping material flows, regulating system flow and pressure, throttling flow, controlling flow direction, and relieving excess pressure to keep systems operating within safe levels.

    Ball valves are ideal for controlling the flow of liquid or gas through a system. The rotary ball within the valve stops the flow of material when the valve reaches a specific state. Ball valves perform well in low-flow situations, throttling vapors and gases in hydrocarbon processing applications. Various applications rely on the low torque and tight seal of ball valves to start and stop the flow of gases and liquids.

    This blog will discuss the advantages, disadvantages, and most common uses and applications for gas ball valves.

    What Makes Gas Ball Valves Different?

    Gas ball valves deliver better performance than other valve types in many applications. Gas ball valves offer a lightweight and compact alternative to heavy brass gas valves. These ball valves come in a range of configurations to suit various specifications and can deliver ideal performance in hydrocarbon systems, as well as vapor, air, and gas systems.

    Most gas ball valves are quarter-turn for easy operation and seal tightly due to the rotating ball mechanism. The valve can start and stop the flow of various liquids and offers a bubble-tight seal when closed. Ball valves often provide an ideal solution for connecting other instruments using tubing.

    Many high-temperature and high-pressure applications rely on metal-seated ball valves to deliver dependable performance. Gas ball valves close and open quickly, providing impressive control of high-pressure flows.

    The Advantages and Disadvantages of Gas Ball Valves

    Ball valves offer a range of benefits for industrial gas system applications, with few drawbacks. The advantages of choosing a ball valve include:

    • Versatility – Performs in a broad range of industrial applications
    • Efficiency – Works at low torque with a bubble-tight seal
    • Ease-of-use – The lightweight and compact design removes frustration from use and installation
    • Affordability – Lower cost than valves of a similar rating
    • Simple maintenance – Reliable operation and easy to repair
    • Strength – Dependable performance in high-temperature, high-pressure, and high-volume applications
    • Durability – Robust operation with a long service life

    Gas ball valves can be at a disadvantage in high-velocity flow and throttling applications. These applications can speed up valve erosion and cause early failure. Using the improper ball valve for the specific fluid may also contribute to faster wear. There are a wide range of ball valves available to suit a variety of unique applications.

    Gas Ball Valve Uses/Applications

    Gas ball valves offer reliable performance in combustible gas applications and effectively regulate air, gas, and vapor flows. Residential and commercial properties rely on gas ball valves to deliver liquefied petroleum gas (LPG), natural gas, manufactured gas, and gas/air mixtures to gas equipment and appliances. Gas appliances such as boilers, water heaters, furnaces, fireplaces, and gas stoves also commonly rely on a ball valve.

    Gas Ball Valves From RED-WHITE VALVE CORP.

    Offering airtight seals and enough durability to provide years of reliable flow control, gas ball valves provide an ideal solution for an expansive range of applications. Ball valves are simple to install and affordable, with a broad selection of material and design options. RED-WHITE VALVE CORP. gas ball valves are made to high standards and 100% air-tested to ensure optimal performance when regulating material flows.

    RED-WHITE VALVE CORP. has been serving the international market with industrial valves since 1971. We ensure the highest quality by manufacturing all of our valves in-house and We maintain multiple warehouses throughout North America giving us unsurpassed fill rates to our family of wholesalers. Browse our line of ball valves to find the best valve for your application, or contact us today with any questions or concerns.

  5. Swing Check Valve vs. Spring Check Valve

    Comments Off on Swing Check Valve vs. Spring Check Valve

    Valves are versatile devices used for controlling the flow of liquids or gases. They play an important role in countless piping and process systems, typically serving to regulate flow and pressure, start or stop flow, or prevent the occurrence of back flow within a system. Swing check and spring check valves are two relatively common valve types that have broad applications.

    Swing check valves prevent reverse flow in systems with horizontal forward flow utilizing a swinging flap. Spring check valves also prevent reverse flow, in this case utilizing a spring-loaded plunger. Understanding the differences between these two valves is beneficial in determining the optimal valve for a particular system or application.

    236AB Check Valve

    Swing Check Valves

    In swing check valves, a flapper will swing away to allow forward flow of a fluid or gas. When it is time to stop the flow, the flapper will swing back onto the seat, closing the valve automatically as the system pressure decreases. Swing check valves are notable due to their large flow capacity. Since these devices require a swinging motion to function, their use is limited to horizontal flows or vertical upward flows.

    Pros and Cons of Swing Check Valves

    The most significant advantage of swing check valves is their low cost, which allows them to work within a wider range of project budgets. They also provide large flow capacity. Since this valve cannot support downward vertical flow, there are limits to the types of systems it can serve. Also of note, swing check valves are also more likely to amplify water hammer.

    Applications of Swing Check Valves

    Swing check valves function well with a variety of media, including liquids and gases. Some frequent use cases for swing check valves include firefighting equipment, flood prevention in sewage systems, and toilet flush mechanisms.

    Spring Check Valves

    Spring check valves typically have hollow bodies and a large stopper, which receives constant pressure from a spring. When gas or fluid flows forward at sufficiently high pressure, the force will overcome the pressure from the spring and cause the stopper to open, allowing the desired flow.

    Unlike swing check valves, spring check valves offer fairly low noise levels. They also minimize the sound and damaging effects of water hammer. This type of valve functions well in vertical applications, as it utilizes a spring to close the valve rather than relying on gravity and pressure.

    Pros and Cons of Spring Check Valves

    Since spring check valves are functional in vertical applications, they offer significantly more versatility than swing check valves, and are much more likely to fit with preexisting piping configurations. Depending on the spring selection, this type of valve will work well in virtually any flow orientation.

    Spring check valves also offer the advantage of reducing water hammer. Known as a “silent check valve,” this type of device keeps noise levels down in applications where swing check valves could potentially exacerbate the issue. Other advantages of spring check valves include:

    • Heat and cold resistance
    • Rapid flow interruption
    • Positive sealing even at a pressures below the cracking pressure

    When compared to swing check valves, however, spring check valves are typically more expensive. They also have a lower flow capacity.

    Applications of Spring Check Valves

    Spring check valves are ideal for numerous purposes in water pipelines and systems. This type of valve serves to protect equipment from the damage that can be caused by back flow, thus reducing the risk of system downtime and potential contamination. Additionally, spring check valves can relieve pressure from the system to create a safer environment and ensure proper system function.

    Valve Solutions from RED-WHITE VALVE CORP.

    RED-WHITE VALVE CORP. has been providing our customers with industry-leading valve solutions for over 50 years. Our global market includes customers in industries such as HVAC, commercial, and plumbing. We perform all our own manufacturing at our own state-of-the-art facilities, giving us superior control over the quality of our products. We also perform 100% air testing during quality control to verify the efficacy of every valve.

    To learn more about our valve solutions and how they will benefit your operation, please contact us today.

  6. Balancing Valves 101

    Comments Off on Balancing Valves 101

    Balancing valveHydronic systems are HVAC systems that utilize water to heat and cool different areas of a facility.Balancing valves are valves designed to attain hydraulic balance within such systems by regulating fluid flow and pressure. When selected and installed properly, they equalize system pressure, creating comfortable thermal conditions in the building while optimizing energy and operating costs.

    How difficult it is to achieve balance within a hydronic system depends on the size and configuration of the system. For example, residential systems are smaller and simpler, so they are easier to balance than industrial or commercial systems, which are generally larger and more complex.

    The following article provides an overview of balancing valves, including the types available and typical applications, to help customers decide which type of balancing valve is right for their needs.

    Types of Balancing Valves

    Types of Balancing Valves
    Click to Zoom

    Balancing valves are available in several variations to suit different hydronic systems. Some of the most prominent types are:

    • Static balancing valves—also called manual balancing valves or pressure-dependent balancing valves—offer a fixed resistance to water flow. The settings for these valves are calculated before installation and then adjusted when the valves are installed in the field. Internal valve parts remain static during system operations.
    • Fixed-orifice balancing valves are a type of static balancing valve that features a fixed orifice, such as a Venturi insert, combined with pressure/temperature ports that enable measurement of the differential pressure across this orifice. Because the orifice remains set during valve adjustments, the flow rate of the system can be derived easily by the pressure drop measured across the ports. This type of manual balancing valve makes for more efficient commissioning.
    • Automatic balancing valves—also known as pressure-independent balancing valves and dynamic balancing valves. These valves are designed to automatically maintain a fixed value of flow rate, despite changes in differential pressure, in order to optimize system operation. In contrast to static balancing valves, these valves have internal parts that move to compensate for changes in differential pressure, enabling them to operate more efficiently under variable load conditions.
    • Pressure-independent flow control valves are all-in-one devices that combine the capabilities of balancing valves, control valves, and differential pressure regulators. They feature built-in differential pressure regulators that automatically accommodate changes in system pressure to stabilize flow within the heating or cooling components to meet different temperature demands. Pressure-independent control valves can matched with actuators that provide remote flow control capabilities.

    Applications of Balancing Valves

    The primary use case of balancing valves is hydronic balancing. This process refers to the optimization of water distribution within a hydronic heating or cooling system by equalizing fluid pressure. Ultimately, by achieving balance within these systems, balancing valves ensure the following:

    • Correct temperature levels are reached and maintained
    • Energy utilization is optimized
    • Operating costs are lowered

    Find out how a differential pressure manometer operates.

    Contact the Valve Experts at RED-WHITE VALVE CORP. Today

    Brass Balancing Valve from Red-White Valve

    Balancing valves play a critical role in hydronic systems. In addition to facilitating heating and cooling operations, they help reduce energy and operating costs. As they are available in several different types, choosing the right one for a system can be difficult. For selection assistance, turn to the valve experts at RED-WHITE VALVE CORP.

    At RED-WHITE VALVE CORP., we are a premier supplier of valves for the HVAC and other industrial and commercial markets. Equipped with almost 50 years of industry experience and advanced manufacturing technologies, we have the knowledge and tools to design and deliver a broad selection of quality valve products, including balancing valves. For more information about our product offerings or assistance choosing one for a particular system, contact us today.

    WE ARE THE MANUFACTURER!

  7. What is a Differential Pressure Manometer?

    Comments Off on What is a Differential Pressure Manometer?

    As the name might suggest, a differential pressure manometer measures the difference in pressure between two readings. These devices help operators and technicians assess the functionality of industrial equipment or HVAC systems. For example, a technician can measure the pressure on either side of an air filter and use the difference to determine if the filter is operating within acceptable parameters. Differential pressure manometers come in multiple different variations to suit different applications. In this article, we’ll discuss the different types of manometers and their advantages.

    Differential Pressure Manometer vs. Single Pressure Manometer

    T650 ManometerManometers can be broken into two broad categories: differential pressure and single-pressure.

    • Differential pressure manometers take two or more measurements and find the difference between each. They can read positive pressure or a vacuum on either side of the equation. Technicians use differential readings for repairs, inspections, and assessments.
    • Single pressure manometers only measure one pressure source and compare it to the open atmosphere. The comparison between a single pressure source and the atmosphere is also called gauge pressure.

    Differential pressure manometers and single-pressure manometers are available in varying standard and smart options.

    U-Tube vs. Digital Manometers

    The original iteration of the manometer came in the form of a U-tube manometers. U-tube manometers consist of U-shaped tubes partially filled with mercury (which is a liquid at room temperature), oil, or water. The units of the U-tube manometer display in inches of mercury (inHg) when using a mercury device, or inches of water (inH20) if using oil or water.

    The level at which the liquid is equal on either side of the U-bend is marked as zero. As pressure is applied to one end of the tube, that fluid measure decreases and the fluid on the other half of the U-bend grows higher. U-tube manometers can also measure negative pressures, or vacuums.

    These tools are fragile and not generally fit for active industrial environments. Instead, they are most commonly used in laboratories and scientific applications. They also can’t hold multiple readings or be automated or digitized. Another drawback of U-tube manometers is their susceptibility to environmental factors. The pressure readings can be affected by atmospheric changes, altitude, and density or gravity variations from day to day. This requires manual corrections to overcome.

    Conversely, digital manometers don’t use physical fluids to measure differential pressure or gauge pressure. They can be portable, interface with computers or programmable logic controllers (PLCs), and hold dozens or hundreds of readings to best suit busy industrial applications. These tools have microprocessors and complex code that can average high volumes of readings to balance out atmospheric changes and complications. Digital manometers are well-suited to complex industrial environments and can transmit the data to multiple different devices and systems to allow for better process control and maintenance.

    <Explore RED-WHITE VALVE CORP.’s selection of balancing valves.>

    Differential Pressure Manometers from RED-WHITE VALVE CORP.

    T650 Manometer - open caseAt RED-WHITE VALVE CORP., we create high-performance digital differential pressure manometers. Our Balancing Computer model can hold up to 20,000 pressure readings at any given time to allow for complex process monitoring and extreme accuracy. Our devices also hold up to 1,200 valves in the memory simultaneously, identifying the valves through image-based detection. These devices also feature a lithium-ion rechargeable battery, a USB charger, a mini-USB port to interface with PCs and PLCs, and a 2.2-inch QVGA RGB 240 x 320 screen.

    If you want to see how our digital differential pressure manometers can help with process improvements in your operation, contact us today.

  8. How Does an Electric Valve Actuator Work?

    Comments Off on How Does an Electric Valve Actuator Work?

    Electric valve actuators control the opening and closing of valves. They can provide either linear or rotary motion and work with different types of valves, including ball and butterfly valves. Electric valve actuators respond to prompts through remote control or centralized process control systems, which make them invaluable for managing systems that are hard to reach or spread across a large area. Process control systems can operate electric actuators from a centralized system to deliver scheduled and programmed commands, thereby allowing organizations to automate the system and improve reliability.

    Overall, electric valve actuators are becoming increasingly responsive, technologically advanced, and easier to use. The following guide explains what you need to know about how these components work and what’s needed to install and use them.

    Electric Actuator Components

    Unlike other valve actuators, electric actuators contain motors that can convert electricity in either linear or rotary motion to open, close, or adjust a corresponding valve. Different electric actuators control various types of movement; a quarter-turn actuator, for example, will turn the valve’s mechanism 90 degrees, which is fully open.

    It’s important to choose the electric valve actuator that runs on the right voltage to match your facility’s system. These systems vary depending on whether an operator uses alternating current (AC) or direct current (DC) power sources.

    Some of the most popular voltage types are:

    • 12 VAC
    • 12 VDC
    • 24 VAC
    • 24 VDC
    • 115 VAC
    • 120 VAC

    Along with the motor, actuators have other electrical components, including a limit switch, wiring, and gearing. All these parts are arranged in a compact, protective housing unit.

    Torque Requirement for Electric Valve Actuators

    Torque is the rotational force an actuator generates to close a rotational valve. Electric actuators can generate this force by transmitting it to the output shaft and then the valve stem. When pressure is applied to the valve stem, the valve’s orifice opens or closes.

    Actuators have different levels of motor capacity (power) based on the torque they need to provide. It’s important to select actuators based on the breakaway torque a valve requires. The “breakaway torque” is how much power is needed to initiate the switch from a static open to a closed position or vice versa. It’s the highest level of torque required to operate the system.

    Mounting Process

    Sloop2 electric valve actuatorWhen you’re mounting electric valve actuators in place, use sturdy, industry-standard parts. Many actuators and mounting hardware use the ISO 5211 standards for connections, which ensures various brands and components work together seamlessly.

    You’ll need at least three components for mounting:

    • An output drive
    • A stem to connect to the valve head
    • A flange that mounts the actuator onto the valve

    Various actuators require different types of flanges based on the torque and fasteners available.

    How to Choose an Electric Valve Actuator

    How to Choose an Electric Valve ActuatorElectric valve actuators can make fluid systems safer and easier to control. They’re especially useful if you need to expand or upgrade your system and make it more complex.

    Here are some parameters that can help guide your decision:

    • Torque: Consider the general torque and breakaway torque requirements of the system. Secondary factors that influence the torque include fluid viscosity and valve size.
    • Voltage Requirements: Determine the current type and intensity of the power source at the site of the actuator installation.
    • Valve Mounting Connection: Different flanges, actuators, and mounting environment requirements can limit your choice of electric valve actuator.
    • IP Rating: IP ratings, as established by IEC 60529, have different levels of protection against environmental factors such as moisture and dust.
    • Enclosure Protection Certification: Similarly, the protective housing and enclosures must be able to act as a barrier against the application hazards that are specific to the environment.
    • Fail-Safe: Integrated electric valve actuators can be programmed with automated settings that go into effect if there’s power loss, an emergency, or system failure.
    • Modulation: Some actuators can control the fluid flow rate, modulating it, while other allow just a ON/OFF control.
    • Application: The fluid material, temperature, and other factors of your intended application can also affect which electric actuator valve will work best.

    Electric Actuator Valves From RED-WHITE VALVE CORP.

    At RED-WHITE VALVE CORP., we serve a variety of industries by providing powerful, integrable electric valve actuators.

    These industries include:

    • Agriculture
    • Food and beverage
    • HVAC systems
    • Oil and gas
    • Paper pulp
    • Power generation
    • Wastewater treatment

    For more details about our exceptional craftsmanship and specs, see our electric actuator product pages:

  9. Wafer vs. Lug-Style Butterfly Valves

    Comments Off on Wafer vs. Lug-Style Butterfly Valves

    A butterfly valve is a type of quarter-turn valve that controls the flow of a product in a pipeline. From pharmaceuticals to manufacturing and food processing, the valve has a variety of applications and can be used to limit solid, liquid, or gas material flow.

    Butterfly valves are usually grouped into two types: lug-style and wafer-style. These mechanical components are not interchangeable and have distinct advantages and applications. The following guide explains the differences between the two butterfly valve types and how to select the right valve for your needs.

    Lug-Style Butterfly Valve

    Lug-style butterfly valves are usually composed of metal such as ductile iron or steel. They feature threaded tapped lugs positioned on the valve flanges for bolt connections.

    Lug-style butterfly valves are suitable for end-of-line service but a blind flange is always recommended. Lug-style butterfly valves are manufactured to be compatible with either pneumatic or electric actuation. Disc and seat material should be determined based on application and flow media.

    Wafer-Style Butterfly Valve

    Most wafer-style butterfly valves are engineered with four holes that align with the connected pipeline. The valve is designed to clamp between two flanges in your pipe work. Most wafer butterfly valves fit the majority of flange standards. The rubber or EPDM valve seat creates an exceptionally strong seal between the valve and flange connection.

    Unlike lug-style butterfly valves, wafer-style butterfly valves cannot be used as pipe ends or end-of-line service. The entire line must be shut down if either side of the valve requires maintenance. Wafer style butterfly valves are manufactured to be compatible with either pneumatic or electric actuation. Disc and seat material should be determined based on application and flow media.

    Water Style

    Industrial Applications

    Butterfly valves are used in a variety of industries, including:

    • Oil and gas
    • Chemical processing
    • Water and wastewater processing and transportation
    • Food processing
    • Pharmaceuticals
    • Manufacturing
    • Shipbuilding and shipyards
    • HVAC

    Choosing between a lug-style butterfly valve and wafer-style butterfly valve depends on your project specifications. For more information about butterfly valves and selecting the right part for your needs, contact RED-WHITE VALVE CORP. today.

Close
Phone

Easily get up-to-date technical sheets for valves

Download RWV App
X

Have Any Questions?

Click Here Now!