What is a pressure reducing valve?

Pressure reducing valve is a device used to control and maintain fluid pressure within a certain range. Its principle of action is based on fluid mechanics and automatic control principles, mainly through the adjustment of fluid flow and valve opening to achieve pressure stability.

Pressure reducing valve usually consists of the following parts:

Main valve: 

It is mainly composed of valve seat, valve spool and spring. The tightening force of the spring will make the valve spool and seat tightly combined, preventing the passage of fluid.

Adjusting component: 

A mechanical device, usually a knob or handle, used to adjust the position of the spool.

Sensing element: 

An element used to detect fluid pressure, which can be a pressure sensor, float, etc.

Principle of operation: 

The pressure reducing valve is to reduce the water pressure by the local resistance of the flow channel in the valve to the water flow, and the range of the water pressure drop is automatically adjusted by the film connected to the valve disc or the water pressure difference between the inlet and outlet on both sides of the piston. The principle of fixed ratio decompression is to use the water pressure ratio control of the floating piston in the valve body, and the decompression ratio of the inlet and outlet ends is inversely proportional to the area ratio of the inlet and outlet pistons. This kind of pressure reducing valve works smoothly without vibration; there is no spring in the valve body, so there is no worry about spring corrosion and metal fatigue failure; the sealing performance is good and no leakage, so it reduces both dynamic pressure (when water flows) and static pressure (flow rate is 0 time); especially when the pressure is reduced without affecting the water flow.

Working principle: 

The pressure reducing valve adjusts the flow of the medium by controlling the opening of the opening and closing parts in the valve body, and reduces the pressure of the medium. Within a certain range, cooling water is sprayed into the valve body or behind the valve to reduce the temperature of the medium. This kind of valve is called a pressure reducing and temperature reducing valve. The quick, easy and optimized automatic selection of pressure reducing valves is included. The characteristic of this valve is to keep the outlet pressure and temperature within a certain range under the condition of constant change of inlet pressure.

It is important to note that the exact operating principle and structural design of pressure reducing valves may vary depending on the type and application. Pressure reducing valves are widely used in various industrial systems and equipment, such as water supply systems, petrochemicals, and air compressors, to ensure stable fluid pressure and safe operation.

Pressure reducing valves offer a variety of advantages that have led to their widespread adoption in many applications. Below are a few of the main advantages of pressure reducing valves:

Pressure Stabilisation:

Pressure reducing valves are capable of controlling fluid pressure steadily between the upper and lower pressure limits. They are able to automatically adjust the valve opening to accommodate different pressure changes and maintain a stable outlet pressure, ensuring that the system operates within safe limits.

Safety Protection:

Pressure reducing valves protect the system from damage caused by excessive pressure. When the pressure in a system exceeds a set upper limit, the pressure reducing valve automatically opens, allowing some of the fluid to flow out, reducing the pressure to a safe range. This helps prevent rupture or damage to piping, vessels or equipment due to excessive pressure.

Flow Control:

Pressure reducing valves can also be used to control the flow of fluid. By adjusting the opening of the valve, the flow of fluid can be precisely regulated and ensures that the demands of the system are met when needed. This is important for applications where a steady flow needs to be maintained, such as water supply systems or hydraulic systems.

Energy savings:

Pressure reducing valves can help achieve energy savings. By reducing the fluid pressure to the desired operating pressure, pressure reducing valves reduce the pressure differential in the system that requires energy consumption. This helps reduce energy consumption and improves the efficiency of the system.

Reliability and durability:

Pressure reducing valves are typically manufactured from high-quality materials that are rigorously tested and certified. They have good corrosion resistance and mechanical strength, and are able to operate reliably for long periods of time under a variety of harsh operating conditions.

Overall, pressure reducing valves play an important role in controlling and maintaining fluid pressure. They offer a variety of advantages such as pressure stabilisation, safety protection, flow control and energy efficiency, making them an essential device in many industrial and commercial applications.

WESDOM Group specializes in pipeline fluid systems: R&D, production and sales of valves, pipe fittings, water meters, flow meters, etc. The products cover cast iron, cast steel, stainless steel, copper, plastics and other materials, which are widely used in hydropower stations, heat, buildings, Water supply and drainage, petroleum, chemical industry, electric power, medical and other fields.

Why more and more customers are choosing wesdom valves:

1. There is a professional technical team, and quality is guaranteed

2. Independent factory, more favorable price

3. Extensively trained employees are well-versed in all aspects of flow control technology

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