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What is Double Regulating Valve? Properties, Uses and Application

Double Regulating Valve

Various components are important in the world of HVAC system installations to ensure optimal performance. The Double Regulating Valve (DRV) is one of the most significant components. It is essential to understand the properties, uses, and applications of DRV, especially for HVAC technicians and installers. So, what exactly is a Double Regulating Valve? How does it work? Let us explore this in detail.

What is Double Regulating Valve?

A Double Regulating Valve (DRV) is a type of pressure control valve that has two independently adjustable outlets, allowing for precise control over the regulated pressure. It functions by controlling the flow of fluid, such as water or air, within a system by using two separate regulating valves to adjust and stabilize the delivery pressure. DRVs are used in various industries — ranging from manufacturing and oil & gas to chemical processing to maintain accurate and reliable process pressures.

Properties of Double Regulating Valve:

DRV is a valve that comes with two operations- flow regulation and isolation of the flow. It is a dual-function valve designed to control and measure the water flow rate in HVAC systems. It has two adjustable features; one regulates the flow rate while the other balances the pressure of the liquid passing through the valve. DRV is available in various sizes, ranging from 15mm to 150mm. It is also available in different materials, including bronze, stainless steel, or ductile iron.

Uses of Double Regulating Valve:

DRV is commonly used to control the flow rate of hot water in hydronic heating systems. It can also be used in cooling systems to regulate chilled water flow. DRV is an essential component in HVAC systems that require precise control of fluid flow rates. It can regulate the flow rate to maintain a constant temperature and pressure drop. DRV is also used in industrial applications where fluids are carried through a piping system.

Application of Double Regulating Valve:

DRV is essential equipment in systems that require precise regulation of fluid flow rates. It is commonly used in HVAC systems in commercial, industrial, and residential buildings. DRV is installed in the return circuit of the hydronic system, with the main objective of continuously controlling fluid flow. This component plays a significant role in maintaining the overall efficiency and performance of the HVAC system.

How to Use Double Regulating Valve:

You need to be mindful of a few things to get the best performance from the Double Regulating Valve. Firstly, installing the DRV in the right location in your HVAC system is essential. Secondly, setting the valve up correctly is critical to ensure it provides the correct flow rate. HVAC technicians and installers can adjust the flow rate using a hand wheel or a screw. For optimal performance, ensure you lubricate the pistons frequently.


In summary, understanding the properties uses, and applications of Double Regulating Valves is critical for the optimal functioning of your HVAC system. This vital component is crucial in regulating water flow in hydronic heating systems to maintain a constant temperature. By following the tips on how to use DRV, HVAC technicians and installers can improve the performance of Heating, Ventilation, and Air Conditioning systems. So, the next time you install an HVAC system, remember to ensure that a Double Regulating Valve (DRV) is part of the system!

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