A direct-acting pressure reducing valve is a device that uses changes in outlet pressure to directly drive the valve disc to achieve pressure reduction and stabilization. It mainly consists of a valve body, piston, spring, and diaphragm. The outlet pressure is set by adjusting the spring. When the medium pressure changes, the diaphragm or bellows senses the pressure difference and drives the piston to change the main valve opening, thereby maintaining downstream pressure stability. This valve uses a copper alloy valve cover and a ductile iron or stainless steel valve body, and is suitable for temperatures up to 300℃, including steam, compressed air, and liquid media. It is commonly used in building hot and cold water supply systems, industrial hydraulic and pneumatic control systems, and is suitable for small flow scenarios with pipe diameters ≤ DN50. It has a compact structure and low price, but suffers from a relatively wide proportional band (30%-40% upstream pressure) and downstream pressure fluctuations with flow rate. Therefore, it is mostly used in applications with stable loads and low control precision requirements. During installation, attention should be paid to valve orientation and pipeline cleanliness, and the condition of the adjusting spring should be checked regularly to prevent breakage.
Installation Requirements for Direct-Acting Pressure Reducing Valve
The installation of a direct-acting pressure reducing valve should meet the following requirements:
1. It should be installed on a straight pipe section in the direction of medium flow and perpendicular to the pipeline.
2. The flow direction of the medium should be consistent with the direction indicated by the arrow on the valve body.
3. Pay attention to the seal between the valve body and the pipeline during installation.
4. Before installation, the valve should be inspected and cleaned to ensure its normal operation.
Maintenance and Care of Direct-Acting Pressure Reducing Valve
Maintenance and care of a direct-acting pressure reducing valve should include the following:
1. Regularly check the valve's sealing and regulating performance.
2. Regularly clean the inside of the valve to ensure it is clean and free of impurities.
3. Regularly replace valve seals to ensure their sealing performance.
4. Regularly check the valve's operating status and promptly identify and resolve any problems.
Direct Acting Pressure Reducing Valve Factory
