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Author Archives: RWVC

  1. Thermal Expansion Relief Valve | Brass, Lead-Free

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    Since 1971, RED-WHITE VALVE CORP. has been a trusted manufacturer of valves for the plumbing, and commercial and industrial HVAC industries. We are committed to in-house design and manufacturing of all our products with fully automated, precision machinery. Our lead-free valves are third-party certified to ensure they meet stringent quality and health standards.

    The 5094AB Lead Free Brass Full Port Relief Ball Valve Thermal Expansion Device is made with lead-free brass, full port ball, adjustable packing gland, and a relief valve port.

    What Are Thermal Expansion Relief Valves?

    Thermal expansion causes pressure to increase in a hot water tank. If that pressure is not relieved, the tank could be severely damaged or even explode. In traditional systems, the pressure is relieved by displacing some of the water into a separate expansion tank.

    Another option is a thermal expansion relief valve (TERV). It is a specialized safety valve that relieves the high pressure by discharging water through an outlet line directly into a drain or water heater pan. TERV technology eliminates the expense and space needed for a secondary tank and is easier to install and maintain.

    5094AB: Brass Thermal Expansion Relief Ball Valve Features

    The 5094AB Lead Free Brass Full Port Relief Ball Valve Thermal Expansion Device is designed and manufactured in-house by RED-WHITE VALVE CORP. Product details include:

    • Materials: lead-free brass body and components per ASTM B927 standard
    • Size: 3⁄4”
    • Pressure rating: 600# WOG
    • End Connections: FNPT x FNPT threaded per ASME B1.20.1-NPT standard
    • Ball and seats: Chrome plated brass ball, PTFE seats
    • Stem, packing nut, and packing: Lead free brass stem, brass packing nut, PTFE packing
    • Adjustable packing
    • Blow-out proof stem design
    • Barbed outlet for drain routing per PEX F-1807 standard


    The 5094AB model is designed for these and other applications:

    • Thermal expansion control in potable water systems
    • Commercial plumbing and hot water systems
    • Residential plumbing and hot water systems


    The 5094AB is easy to install and built to last from durable brass, requiring minimal maintenance. The adjustable packing gland design allows you to adjust the brass nut tightness as necessary for a secure, leak-free seal.

    Compliance Information

    In addition to our in-house quality assurance standards, the 5094AB Lead Free Brass Full Port Relief Ball Valve Thermal Expansion Device meets these requirements:

    • AB1953 and NSF/ANSI 61 & 372 certified
    • Meets lead-free requirements of Safe Drinking Water Act
    • Complies with Buy American Act (BAA)

    Your Choice for Thermal Expansion Relief Valves

    RED-WHITE VALVE CORP. offers a comprehensive selection of valves for use in commercial, residential, and industrial plumbing and HVAC applications, including:

    At RED-WHITE VALVE CORP., we are the manufacturer. All of our valves are made in our own facilities with fully automated, precision machinery, and we promise you the highest quality and safety in every product. For more information about our 5094AB Lead Free Brass Full Port Relief Ball Valve Thermal Expansion Device, request a quote today.

  2. Benefits of Press Fitting vs. Brazing for Pipe-Joining

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    Pipe connections are integral to the optimal function of plumbing systems. Traditionally, brazing, welding, and soldering are popular techniques for pipe connection projects, but these skills cost extra time, money, and hours of training while presenting safety concerns.
    To make pipe connections easier and more affordable to install, the industry is rapidly adopting a newer technique known as press fitting, a mechanical pipe joining system. Learn more about the benefits of press fittings for pipe connections compared to brazing and other traditional techniques.

    Press Fitting vs. Brazing/Soldering for Joining Pipework

    Brazing is a pipework technique that uses a molten filler material known as brazing filler to join two pieces of metal. First, the brazer cuts, cleans, and prepares a pipe and a fitting. Then, using a torch, the brazer heats the pipe and fitting to a very high temperature. Once the pipe is sufficiently hot, the brazer adds filler metal to the joint, filling any gaps and forming a solid bond when it cools. Proper training and safety precautions are essential when brazing pipes, as it involves working with open flames and high temperatures.

    Press fitting, on the other hand, is a mechanical assembly technique used to join two or more parts together without the need for welding or additional fasteners like screws, bolts, or adhesives. Plumbing press fitting involves the insertion of a pipe into a fitting, which is subsequently sealed by pressing the pipe and fitting socket together using the electric jaws of a press-fitting tool. In addition to making it easier for workers without specialized training to join two lengths of pipe, press fitting delivers enhanced efficiency, safety, and flexibility for most pipe-joining applications.

    Why Use Press Pipe Fittings/Valves for Your Plumbing Application?

    The following are some of the benefits of press fittings in plumbing applications:

    • Saved time and money: With press fittings, little skill is required, and connections can be made in less time than it takes to weld or solder pipes. This makes press fitting an excellent time- and cost-saving solution, especially when handling large-scale pipe systems. 
    • Faster than brazing: While there are certain applications still well-suited to brazing, press fitting offers a significant advantage in terms of speed, completing tasks three times faster than brazing. This efficiency allows workers to minimize their on-site time commitments.
    • Lower labor costs: Press fitting tools streamline the process of connecting pipes and constructing systems, resulting in reduced labor requirements and, consequently, lowered project expenses. More projects can be completed within the same timeframe.
    • Pipe material compatibility: You can use press fitting with carbon steel, copper, or stainless steel piping. Compatibility with these materials makes press fittings suitable for various applications, such as handling gases, corrosive substances, petroleum products, steam, and potable water. 
    • Enhanced jobsite safety: Compared to brazing, press fitting is safer since it eliminates the need for brazing torches, reducing the risk of fire and burn injuries. This is particularly beneficial in areas with limited ventilation or when working in confined spaces like cabinets, beneath floorboards, or wall cavities.
    • Secure connections: Press fitting tools are consistently strong and secure. As long as the pipe is prepared in accordance with the manufacturer’s press tool system instructions, press fitting connections will exhibit strength comparable to a soldered or welded joint.
    • Improved accuracy: One of the distinct advantages of press fitting is that it significantly enhances job accuracy, reducing the potential for human error. Human errors are usually a concern in welding, brazing, and soldering, potentially leading to incomplete or inaccurate pipe connections.
    • Streamlined repairs and maintenance: Utilizing a press fitting tool for pipe system repair and maintenance enhances the efficiency of the process. Press fitting can still be done even if the piping system is wet, so repairs can be done without shutting down the entire system.

    Contact RED-WHITE VALVE CORP. for EzPress Valve Solutions

    There is no doubt plumbing press fittings in pipe connections offer superior benefits compared to brazing or soldering. RED-WHITE VALVE CORP. is a leading valve manufacturer, with a range of press valve products using high-quality lead-free alloys. For potable water or plumbing applications, our lead-free valves undergo rigorous testing and certification by an independent third-party laboratory to guarantee compliance with the highest quality and health standards.
    Contact us today or request a quote to start your order.

  3. What Are Pump Flanges?

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    Flanges are an essential component of many piping and pumping systems, such as those in plumbing, automotive, oil and gas, and other pressurized systems. Many flange attachments come with built-in ball valves that can be shut off to isolate the pump. Once the pump is disconnected, it can be replaced without losing water or system pressure. Learn more about pump flanges, including their benefits and applications.

    Click to Expand

    What Are Pump Flanges

    What Is a Flange?

    The basic definition of a flange is a flat extension that provides a stronger connection between attached parts. For pipes and pump applications, flanges are collar-like extensions that can be easily installed, along with a gasket, for a reliable, sturdy connection. Pump flange valves help connect pumps to a larger system. When the valves are closed, isolating the process flow, the pump can be replaced or otherwise serviced without completely draining the system. Some pump flange valves, such as our 2412 Brass Pump Flange Ball Valves, include a purge/drain valve that can be used to fill or drain the system as needed.

    Benefits of Flanges

    Flanges are a useful aid to piping and plumbing applications where they can replace traditional connections, making maintenance easier and systems more reliable. Some advantages of using flanges include:

    • Improved Access: Flange connections can be much easier to install in tight spaces where traditional fittings or adapters would be hard to use. They also typically require less torque to tighten properly than other connection methods. Flanges also help eliminate the need for adapters in the tube, pipe, or hose line.
    • Easy Maintenance: Flanged valves also simplify maintenance, cleaning, and inspections, especially in rigid systems of continuous or metal piping. Flanges allow a pump or section of piping to be easily dismantled without needing to drain the system.
    • Enhanced Reliability: Due to their ability to distribute the pressure around a connection, flanges are ideally suited to creating solid, resilient connections that are less likely to be compromised or loosened by shock, vibration, or high pressure.

    Applications of Flanges

    As a result of these strengths, pumping flanges are commonly used in applications for many industries, including:

    • Plumbing – Linked with bolts, flanged ends provide highly secure connections in high-pressure piping systems for plumbing applications.
    • Hydronics – Pumps with flange connections are used to pump media through the hydronic loops.
    • Petroleum – The oil and gas industry installs numerous flanges in vessels and piping systems to enable them to withstand temperature fluctuations and high stress.

    Pump Flanges From RED-WHITE VALVE CORP.

    With over 50 years of experience manufacturing top-quality valves and components for our clients in numerous industries, RED-WHITE VALVE CORP. is dedicated to delivering high-performance products and excellent customer service. We offer an extensive array of pump flanges in standard and lead-free materials, including:

    Contact us today to learn more about our full line of products and capabilities.

  4. Importance of Using CSA-Approved Gas Ball Valves

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      5100 1-piece Brass CSA Gas Ball Valve

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      5200 Brass CSA Gas Ball Valve

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      5210 Brass CSA Gas Ball Valve

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      5211 Brass CSA Gas Ball Valve

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      5212 Brass CSA Gas Ball Valve

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      5221 Brass CSA Gas Ball Valve

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      5231 Brass CSA Gas Ball Valve

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      5241 Brass CSA Gas Ball Valve

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    Gas ball valves can include various markings that identify certain testing and ensure quality. One of the most prominent markings is CSA or Canadian Standards Association. CSA is an organization that tests gas ball valves to ensure they meet US and Canadian standards, including NSF International (NSF), CSA Group (CSA), Underwriters Laboratories (UL), American National Standards Institute (ANSI), and other global and North American standards.

    A CSA-approved product will have a CSA logo with a “C,” “US,” or both, indicating which country’s standards the product has been tested to. While CSA certification is not mandatory, it gives consumers confidence in the performance of the ball valve product. Here, we will explore the markings on gas ball valves for indoor and outdoor use and compare UL ratings to CSA to help determine which marking you should look for in a high-performance gas ball valve product.

    Indoor Ratings vs. Outdoor Ratings

    CSA sets the ratings for gas ball valves, which are marked on the valve body. The ratings differ based on the country and whether the valve will be installed indoors or outdoors.

    Indoor Gas Ratings

    Both the US and Canada use the same ratings for indoor valves. The CSA gas ratings for indoor gas ball valves are 5G and 1/2 PSI, each of which has different applications. 5G ratings are for gas ball valves used in household piping systems, whereas the 1/2 PSI rating indicates valves used in gas-fired appliances.

    Outdoor Gas Ratings

    For a gas valve to be used outdoors, it must have either of the following ratings:

    • CAN 3.16: A Canadian gas pressure rating of 125 PSIG for outdoor use in piping systems. For gas ball valves to be installed outdoors in Canada, they must have this rating.
    • BRS125G: A US gas pressure rating of 125 PSIG for outdoor use in piping systems. For gas ball valves to be installed outdoors in the US, they must have this rating.

    UL vs. CSA Ratings

    In addition to CSA ratings, gas ball valves may also be marked as UL-certified. UL is a US-based organization, while CSA is Canada-based. Both certifications are well-respected and have worldwide credibility.

    Although both UL and CSA ratings are internationally recognized, a UL certification only applies to the United States, whereas a CSA certification applies to the United States and Canada. Because of this, gas ball valves and other products for international export will be at a slight advantage if they have a CSA rating. Regardless of which certification you choose, they both have the required expertise, knowledge, and skill to certify gas ball valves.

    CSA Approved Gas Ball Valves From RED-WHITE VALVE CORP.

    Gas ball valves require CSA certification for use in combustible gas applications. The association rates gas ball valves based on country-specific requirements and application areas, and the certification is recognized by several US regulatory bodies, including ANSI and OSHA. Compared to standard untested valves, CSA-approved gas ball valves ensure optimal safety and performance.

    When determining which markings to look for, it’s important to understand your application’s requirements for installation location and pressure. Look for 1/2 PSI and 5G ratings for indoor applications and CSA 3.16 or BRS125G for outdoor applications. At RED-WHITE VALVE CORP., we supply CSA-approved indoor and outdoor gas ball valves for various industrial applications. For more information, explore our CSA gas ball valves or contact us today.

  5. Ball Valve

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    The durability and versatility of ball valves make them an ideal solution for a range of industrial and commercial applications. Ball valves have a range of unique benefits. They function well even in challenging environments and can withstand exposure to high temperatures and pressures, as well as contaminated gas or liquid. RED-WHITE VALVE CORP. has been a leader in the valve industry for over 50 years. Our team of professionals can help you determine if ball valves are the best solution for your application.

    What is a Ball Valve?

    Ball valves are a type of shut-off valve characterized by a spherical disc that controls the flow of liquid or gas through a port. This type of valve is particularly popular in applications that feature high temperatures or pressures, as well as applications requiring a very tight shut-off. Ball valves are available with openings in multiple sizes, including standard and full port ball valves, to accommodate different flow rates. LF Brass Hose End Ball Valve

    How Does a Ball Valve Work?

    This type of valve may be operated either manually or by an actuator. When an external force moves the lever, the valve’s stem moves the ball by a quarter-turn, opening the valve and allowing the gas or liquid to pass through. To stop the flow of gas or liquid, the operator must turn the lever in the opposite direction. This will return the ball to its original position.

    Ball Valve Features & Benefits

    Several features characterize ball valves. These include:

    • Valve stops
    • Position indicators
    • Anti-static
    • Standard face-to-face dimensions
    • Fire-safe

    In addition, ball valves have many unique benefits, which include:

    Compact Design

    While some valves are quite large, ball valves have an economical design. This enables them to perform well in a versatile range of applications. Additionally, it is possible to inspect ball valves without removing them from the line.


    Ball valves perform well in harsh environments. They can withstand applications in which they are exposed to high volumes, temperatures, and pressures.

    Fast Shut-Off Speeds

    Their responsiveness makes ball valves ideally suited for complex applications that require rapid shut-off speeds.

    Corrosion Resistance

    Ball valves are available in a range of materials, including stainless steel and PVC, that offer superior levels of corrosion resistance. The design of these valves also makes them less prone to damage even in challenging environments.


    As they are available in a range of materials and designs, ball valves offer high levels of versatility. They are ideally suited for an array of industrial applications.

    Long Service Life

    The durable, high-quality design of ball valves gives them a particularly long service life. They continue to provide strong seals even after long periods of disuse.

    Ball Valve Applications

    Due to the reliability and durability of ball valves, they are ideally suited for a diverse array of applications. They function well in harsh environments and continue to perform well even when they encounter contaminated media. Some of the most common applications for ball valves include:

    • Compressor skids
    • Turbine skids
    • Generator skids
    • Separator skids
    • Crude oil plants
    • Field gas plants
    • Polymer plants
    • Industrial gas processing plants
    • LNG plants
    • Gas feed lines
    • Automated processing
    • Hydrocarbon processing
    • Oil refinery feedstock lines
    • Tank farms

    Meeting Your Valve Needs for Over 50 Years

    At RED-WHITE VALVE CORP., we have spent the past 50 years working to meet the needs of our customers by manufacturing a range of industry-leading valve solutions. We are dedicated to collaborating with our customers and meeting the highest standards of customer service, with each of our representatives offering expert knowledge of our products and services. By manufacturing our products in-house, we ensure reliable and high-quality results at competitive prices. To learn more about our valve solutions, contact us or request your quote today.

  6. Hydronic Valve

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    Hydronic HVAC systems for heating and cooling operate at peak performance only after achieving hydronic balance and temperature control. The best way to ensure this is through hydronic balancing – a process of optimizing the distribution of water in a building’s HVAC system by equalizing the system pressure using hydronic balancing valves. 

    RED-WHITE VALVE CORP. has served the commercial, industrial, plumbing, and HVAC industries for over half a century with an extensive range of top-quality valves. Our business philosophy is rooted in integrity, quality, and reliability, allowing us to further our reputation as an industry-leading valve producer.

    Balancing a Hydronic System

    Hydronic HVAC systems utilize heated or cooled water to heat or cool a facility. The conditioned water circulates through a closed system to achieve the desired temperature in specific areas of the facility. For optimal performance, it is essential to implement balancing measures to prevent underflow or overflow conditions. The aim is to provide the right amount of water at the right place and at the right time. A balancing valve ensures that all zones get proper flow under design conditions, ensuring optimal efficiency, comfort, and energy savings. 

    Unbalanced systems can lead to insufficient or excessive heating or cooling. Unbalanced systems will also be plagued by noisy operations, high energy use, and reduced valve and pump life. DZR LF Brass Fixed Orifice Static Balancing Valve

    There are two types of balancing valves: 

    • Manual balancing (Static): Also called pressure-dependent balancing valves, static valves offer a fixed resistance to water flow. Since they don’t adjust to changing system pressure, the valve settings are calculated and adjusted before installation. 
    • Pressure independent balancing (Automatic): This hydronic valve throttles to produce the pressure drop required to reduce the flow rate down to the design flow rate. Unlike static balancing valves, they have internal elements which move to adjust and compensate for differential pressure changes, allowing them to maintain a constant flow and operate more efficiently under variable load conditions.  

    Hydronic Valve Features & Benefits

    Both types of hydronic balancing valves offer unique advantages that make them suitable for different applications.

    Manual Balancing Valves

    Manual hydronic balancing valves are manually adjusted throttling valves that serve as a permanent resistance built into the system. They are pressure-dependent and maintain a balanced system at full-load conditions (designed load). Manual valves have several benefits: 

    • Sensitive – can read low rates accurately.
    • Environmentally friendly – manual balancing valves use much less energy than automatic hydronic valves.  
    • Cost-effective – they are energy efficient, which will translate to reduced energy costs.
    • Intuitive – easier to troubleshoot if there’s a problem. 

    Automatic Balancing Valves

    These balancing valves function independently of pressure and can maintain the designed flow rate within the PSID range specified by the manufacturer. They can also maintain an overall system balance, even when other branches fluctuate. Benefits of automatic balancing valves include: Straight DZR Brass Automatic Balancing Valve with Isolation Ball Valve

    • Ease of use – unlike manual balancing valves, automatic valves can automatically adjust with changing water flow rates, so there is no need for adjustments. 
    • Efficient – automatic balancing valves ensure more accurate balance in the water flow distribution throughout the system.
    • Durable and quiet – automatic balance valves are long-lasting and help eliminate noise and vibration in HVAC systems. 
    • Time-saving – automatic valves require less time and cost for maintenance.

    Hydronic Valve Applications

    Hydronic valves have several applications, including: 

    • HVAC: Hydronic balancing valves are used in HVAC systems to ensure the system delivers proper flow to all terminals.  
    • Heat exchangers: Balancing valves are used in heat exchangers to deliver the desired flows in low temperature, chilled, or hot water applications and provide the desired flow rate to maintain comfort and energy.
    • Power generation systems: Hydronic flow control valves are used in power generation systems to control conditions such as flow, pressure, temperature, and liquid. 
    • Refrigeration systems: Hydronic valves control the flow of liquid refrigerant between the low side and high side of a refrigeration system.
    • Server cooling systems: Hydronic zone valves are used to regulate water flow in hydronic server cooling systems.
    • Water return lines: Hydronic check valve keeps water flowing in one direction only and prevents reverse flow. 

    Hydronic Balancing Valves from RED-WHITE VALVE CORP.

    At RED-WHITE VALVE CORP., we manufacture and distribute a broad selection of balancing valves. Our valves feature brass (DZR) construction for superior corrosion resistance and a fixed venturi design for easier setting requirements. We also offer accessories for all types of connections. Contact us today to request a quote


  7. Use of Balancing Valves in Hydronic Systems

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    Balancing valveBalancing valves are throttling devices designed to regulate the fluid flow through hydronic components. In hydronic systems (HVAC systems that use water as a medium to heat and cool areas of the facility), they facilitate the distribution of heated or chilled water to all terminals. As a result, the system is able to achieve optimal performance, which translates to higher operating efficiency and lower operating costs.

    The following article discusses balancing valves for chilled water systems and heated water systems, including what they do, how to adjust them, and typical applications.

    What Does a Balancing Valve Do in HVAC Systems?

    The flow of fluid in an HVAC system is constantly changing to accommodate alterations in the conditions of the facility. Some of the factors that influence the demand for heating and cooling include building occupancy levels and heat from the sun. Properly designed and constructed HVAC systems should be able to offer the correct output when and where it is required. In unbalanced systems, there is a risk of underflow or overflow conditions, which can lead to insufficient or excessive heating or cooling. Balancing valves ensure the system delivers the right flow to all of the terminals, given the current facility conditions.

    How a Balancing Valve Works

    Receiving proper input flow & temperatureReceiving improper input flow & temperature

    Hydronic Circuits

    The flow of fluid in an HVAC system is constantly changing to accommodate alterations in the conditions of the facility. Properly designed and constructed HVAC systems should be able to offer the correct output when and where it is required.

    Unbalanced System

    Unbalanced System

    Water will take the path of least resistance. Unbalanced systems risk underflow or overflow conditions, which can lead to insufficient or excessive heating or cooling. Rooms further from the pump receive less water due to different “resistances” created by lines of different length. Head loss grows with pipe length, turns, restrictions and gravity.

    Balanced System

    Balanced System

    Balancing valves add the proper “resistance” on all lines, ensuring that the system delivers the right flow and temperature to all of the terminals, given the current facility conditions.

    How Do You Adjust a Manual Balancing Valve to Maintain System Balance?

    Differential pressure manometers/balancing computers—measure the pressure difference between two pressure points. Industry professionals can use this tool to calculate flow rates and determine if and when adjustments on the balancing valve(s) are needed to maintain system balance.

    Typically, an HVAC system has a balancing valve for each terminal-unit coil and air-handling unit (AHU). Adjusting all of them to maintain system balance involves several steps. For manual balancing valves, these are:

    1. Connecting a differential-pressure gauge or circuit-balancing instrument to the two metering/test ports of the valve
    2. Determining the required rate of flow through the balancing valve
    3. Adjusting the handwheel to achieve the proper flow rate
    4. Repeating the above steps for all balancing valves

    Applications of Balancing Valves

    As indicated above, balancing valves help achieve and maintain proper conditions within hydronic systems. In addition to being used in HVAC systems, they are also integrated into the following:

    • Heat exchangers
    • Power generation systems
    • Refrigeration systems
    • Server cooling systems
    • Water return lines

    Contact the Valve Experts at RWV Today

    Balancing valves are an essential component of hydronic systems. They ensure the proper temperatures within the facility are achieved and maintained, energy utilization is optimized, and operating costs are reduced. If you need balancing valves for your facility, turn to the experts at RWV.

    At RED-WHITE VALVE CORP., we manufacture and distribute a broad selection of balancing valves. Our valves feature brass (DZR) construction for superior corrosion resistance and a fixed venturi design for easier setting requirements. We also offer accessories for all types of connections. To learn more about our products and how they can benefit your hydronic system, contact us today.

  8. Globe Valves vs. Gate Valves

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    Gate valves and globe valves both serve important roles in applications that require control of liquid and media passing through industrial systems. As the most common valves used in industrial plants, they are often used in the same applications and are very similar in appearance, but they have different functionalities. 

    It is important to understand these differences when deciding what valve type to use in your application. This article discusses the differences between and the purposes of each type of valve.

    Globe Valves

    At a glance, it is easy to understand why globe valves were named as such. Traditional globe valves closely resemble a globe. Belonging to the linear motion valve family, globe valves are primarily intended to start, stop, and regulate the flow of media. Most globe valves have a top-entry design, meaning you have to access the valve’s internal components from the top.

    211B Bronze Globe Valve

    Globe valves provide a tight, efficient seal to limit the risk of leakage. They are suitable throttling valves because their seats are parallel to the media flow, preventing erosion of the seat when the valve is on. Globe valves experience high-pressure drops and are more resistant to media flow when the valve is turned on.

    Applications that encounter high temperatures, high pressures, or highly viscous media call for globe valves. They are appropriate for applications that require a safe, leak-proof solution that resists corrosion. Due to their capabilities, globe valves are more costly than gate valves but are a worthwhile expense in certain applications.

    Gate Valves

    206AB LF Brass Gate Valve

    As part of the shutoff valve family, these linear valves feature a wedge-shaped gate and a rising or non-rising stem to indicate when the valve is open or closed. The primary function of gate valves is to isolate media by providing a tight seal to stop the flow. Unlike globe valves, they don’t regulate the flow of media, but they can accommodate any flow direction.

    Gate valves are ideal for applications that require tight sealing. Knife valves, a unique variety of gate valves, are suitable for viscous media. Gate valves are useful in wide variety of above- and below-ground applications and are suitable for all kinds of fluids, including gas and water.

    Differences: Globe Valves vs. Gate Valves

    Click to Expand

    Globe Valves and Gate Valves

    While they appear similar in design and can be used in similar ways, these two valves differ in functionality, structure, sealing capabilities, and application.

    Some of the most distinct differences between globe valves and gate valves include the following:

    • Performance/Functionality: Globe valves are control valves, meaning they can start, stop, and regulate media, giving the operator full control media flow. The primary function of gate valves is to isolate media. Its design does not cater to flow control.
    • Structure: Globe valves and gate valves differ significantly in terms of structure. Globe valves tend to have a complicated structure with most of their components housed internally. Their design allows for a change in flow direction and obstruction, which promotes its throttling function. On the other hand, gate valves have a more simplistic structure. Their components are found on the upper part of the valve body, so they become hollow when the valve is open. Gate valves also have a non-rising or rising stem.
    • Sealing surfaces: Globe valves provide a superior seal to gate valves due to its internal valve core, which effectively seals globe valves. Gate valves only seal on the surface of the valve disc, creating a weaker seal.
    • Application: Because globe valves experience such drastic pressure changes, they are ideal for application that are unaffected by pressure drops. Gate valves are multidirectional, and they are suitable for applications that are more sensitive to drops in pressure.

    Valve Solutions at RED-WHITE VALVE CORP.

    Successful applications depend on choosing the right components to suit the job. At RED-WHITE VALVE CORP., we are committed to providing our customers with high-quality solutions that provide optimal system performance.

    With over 50 years serving the commercial, industrial, HVAC, and plumbing industries, we have the expertise to help you find the right solution for your business. To learn more about our selection of globe and gate valves, contact us or request a quote today.


  9. How to Maintain a Gas Tankless Water Heater

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    Gas tankless water heaters offer an energy-efficient and cost-effective way to get hot water on demand. However, these systems require proper maintenance to prevent premature component failure and ensure long service life. Generally, tankless water heaters should be serviced once a year; however, they may require more frequent maintenance if you have hard water or if you keep your water temperature high. To ensure that your tankless water heater is properly maintained, there are many steps you can take.

    What is a Tankless Water Heater?

    Tankless water heaters are a type of on-demand water heater that provides hot water when needed. They are capable of heating water without the need for a storage tank. Once a hot water faucet is turned on, cold water moves through the unit’s heat exchanger before it is heated by a natural gas burner. This results in a constant supply of hot water without having to wait for a storage tank to fill.

    Some of the primary advantages of gas tankless water heaters are their energy efficiency and compact size. This means that these systems not only save money but also save on the amount of space they take up in an area. However, minerals can build up within the heat exchanger over time, which can cause clogs and affect the water flow speed. Because of this, tankless water heaters require a certain degree of maintenance to ensure optimal performance.

    Steps for Maintaining a Tankless Water Heater

    When performing maintenance on your gas tankless water heater, it’s important to follow these steps:

    All tankless water heaters are not alike and therefore, cleaning procedures may differ.  Always refer to the manufacturer’s recommendations on proper cleaning procedures.

    Steps for Maintaining a Tankless Water Heater
    Click to Zoom

    1. Turn Off The Energy Source

    To ensure optimal safety, it is crucial to turn off the energy source before performing inspection or maintenance. In the case of a gas tankless water heater, you will need to turn off the main gas supply valve.


    2. Close All Main Water Valves

    To prevent water from entering the water heater, you must close the main water valves. Typically, there is a blue valve that marks cold water (in) and a red valve that marks hot water (out).


    3. Remove Purge Port Valve Caps

    Purge port valve caps cover and protect the hose connections used for maintenance.


    4. Attach Hoses To Each Valve

    Connect hoses to the hot and cold purge ports. The hose connected to the cold valve (blue) will attach to a small recirculation pump. The hose connected to the hot valve (red) will feed back to the cleaning solution container.


    5. Open the Port Valves

    Open all the port valves by turning them perpendicular to the direction of the water lines.


    6. Descale

    To thoroughly clean your tankless water heater, use a commercial descaling solution or white vinegar mixture to the container. The recirculation pump should be submerged in the cleaning fluid container. Turn on the pump. The pump will push the cleaning fluid through the hose and into the heat exchanger. The fluid will then exit the heater and return to the cleaning fluid container. 

    (Note: some manufacturers require the electrical power to be on during this procedure to allow all internal actuated valves to open properly)


    7. Flush and Drain the Unit

    To complete your maintenance routine, simply flush and drain your tankless water heater for approximately 45-60 minutes for thorough cleaning. Now, you can close the port valves, disconnect the hosing, and reseal the purge valves. It is always a good idea to do a final flush with clean water to remove any cleaning solution from the unit. 

    Tankless Water Heater Valve Kits From RED-WHITE VALVE CORP. 

    At RED-WHITE VALVE CORP., we offer valve and valve kits for gas tankless water heater maintenance. To ensure that all your daily tasks run smoothly, it’s crucial to maintain proper water pressure, and maintaining your water heater’s pressure relief valves is a key step in doing this. Our water heater relief valves relieve excess pressure in your tankless water heater to prevent pressure buildup that could lead to a tank burst. 

    Our valve and valve kits for tankless water heater maintenance include:

    To learn more about the gas tankless water heater maintenance solutions from RED-WHITE VALVE CORP., contact us or request a quote today.


  10. Everything You Need to Know About Ball Valves

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    Ball valves are a type of shut-off valve designed to control the flow of a gas or liquid through the use of a pivoting ball that has a port through its center. When the ball is rotated 90°, the medium is either blocked or allowed to flow through, depending on the orientation of the port. Ball valves come in a wide range of styles, materials, and sizes to meet the particular needs of various applications.

    What Are Ball Valves?

    Ball valves are installed throughout piping systems to allow, obstruct, and control the flow of various vapors, gases and liquids. The ball is mounted against two seats and is connected with a shaft to the control mechanism used to rotate the ball. When the port opening is perpendicular to the flow, the fluid is not allowed to pass through the valve. By rotating the port to the open position, fluid is allowed to pass through at a controlled rate. 5044AB DZR LF Brass Full Port Ball Valve


    One key design element of ball valves is their construction material. Ball valves can be constructed from a wide range of materials, such as metals, plastics, or metal fused with ceramic. The ball itself is often plated with chrome for added durability. The ideal ball valve material depends on factors such as operating temperature, pressure, and the type of fluid that will move through it. 

    Another design aspect of ball valves is their port profile. The hole through the ball can have different profiles such as V-shaped, reduced port or full port:

    • V-Shaped. A V-shaped or characterized profile allows for more precise control of flow rate by rotating the ball. The profile can be optimized to achieve linear flow characteristics.
    • Reduced port. This is the most common type of bore profile. Reduced bore ball valves can introduce friction losses into a system; however, these losses are relatively small compared to other valve types.
    • Full port. These ports have the same diameter as the pipe, meaning they are easier to clean and there are no extra friction losses. However, full port valves often cost more and are bigger than standard ball valves.


    Similar to other valves that use a rotating disc to control the movement of fluid throughout a system, ball valves use a ball to control the fluid. By moving the actuator, the ball rotates to a point where the port aligns with the valve body outlet and inlet, allowing the fluid to flow through the valve.

    The valve needs a one-quarter turn of a handwheel to move from fully open to fully closed. This small degree of movement allows operators to quickly open and close the valve in the event of an emergency. By closing the valve, operators can easily isolate a section of piping for repairs, installation, or inspection.


    Because of minimal flow restrictions, ball valves cause a low-pressure drop compared to other valve types, which prevents valve damage. Since ball valves only require a one-quarter turn to fully open or shut off, they offer a great way to immediately allow or restrict fluid flow. This advantage makes ball valves a popular option for a wide range of residential and specialized applications, including:

    • Outdoor hoses, plumbing, washing machines, and other residential applications
    • Oil and gas refining and processing applications
    • Automotive production applications
    • Power processing

    Ball Valve Parts

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    Valve Housing or Body

    This exterior shell houses the other valve components. It’s often constructed from a rigid metal that can provide adequate protection to the internal components.


    The spherical ball features a hole in the center, known as a port. The port serves as an opening to either allow or block the flow of fluid, depending on its position. When the cross-section of the port aligns with the fluid path, fluid is allowed to flow through. This is crucial in preventing throttling. 


    The seat seals the gap between the ball and the body of the valve.


    The stem connects to the actuator or handle that rotates the ball. It has o-rings or other seals in place so fluid can’t leak between the shaft, stem, or bonnet.


    This is part of the valve housing. It contains and protects the shaft and its packing.


    Working With RED-WHITE VALVE CORP.

    At RED-WHITE VALVE CORP., we specialize in creating high-quality ball valves for various residential, commercial, and industrial applications. Our products include:

    For more information about our capabilities, or for help determining the right ball valve for your application, contact our experts or request a quote today.


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