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Precision Pressure Reducing Valves for Reliable Flow Control

Engineered for durability with UPVC/CPVC/PP bodies and PTFE composite diaphragms, offering adjustable output from 1 to 9 bar.

  • Factory set at 1 bar, field-adjustable from 1 to 9 bar to meet your precise system requirements.

  •  Features corrosion-resistant polymer bodies (UPVC/CPVC/PP) and a long-life PTFE composite diaphragm for reliable operation.

  • Supports multiple connection methods (adhesive, hot melt, thread, flange) and handles neutral media like water.

  • Designed with a secure adjustment mechanism (lock nut + optional lead seal) and built to withstand standard pressure tests.

  • Features a straightforward adjustment process and durable construction for minimal upkeep.

Category:
Pressure reducing valve size table
Unit： mm
Model Norm L H D h d z
18815 DN15 170 172 82 27 20 21
18820 DN20 170 172 82 27 25 21
18825 DN25 212 202 107 35 32 26
18832 DN32 226 202 107 35 40 28.5
18840 DN40 292 259 148 58 50 37
18850 DN50 305 259 148 58 63 37
Pressure reducing valve installation and maintenance instructions
Installation and Usage Instructions Valve body parameters
Install Flow direction should be consistent with the arrow direction on the valve body.  Body material UPVC、CPVC、PP
Check valve body pressure Use a neutral medium to check the pressure, such as water. Diameter DN15~DN50
Test pressure < permissible equipment pressure. Pressure 1.0Mpa
Test pressure < 1.5PN. Diaphragm material PTFE+Composite rubber
Test pressure < PN + 5 bar to check valve seal. Connection method Adhesive bonding, Hot melt bonding, Thread, Flange
Set pressure Factory default value: 1 bar (other default values ​​can be agreed upon with the manufacturer). Output pressure 1~9bar
The pressure relief valve must be set according to the environmental conditions that will be used in the future. Maintenance and Repair
Recommended setup: Install a diaphragm pressure gauge at the front end of the pressure reducing valve. Maintenance The normal operating condition remains unchanged, and the sealing performance is normal.
Step: Operating noise and vibration;
1. Remove the protective cover of the adjusting bolt and loosen the bottom locking nut. Tighten the housing bolts to the specified torque, and clean the valve with a damp cloth as needed.
2. Rotate the adjusting bolt counterclockwise until you can clearly feel the compression spring completely released.  Repair Protective equipment should be properly installed as required, media should be safely recycled, and hazardous waste should be disposed of in an environmentally friendly manner.
3. Start the equipment and rotate the adjusting bolt clockwise until the desired equipment pressure is reached. Remove the valves to ensure the equipment is emptied, depressurized, and cooled.
4. Use a box wrench to hold the adjusting bolt in place while tightening the lock nut, then install the protective cover. Ensure the equipment will not restart, then remove the valve from the pipeline.
5. If necessary, the adjusting bolts can be sealed with lead to prevent unauthorized adjustments. When it is necessary to disassemble a valve, be aware that there may still be media in the dead corners of the valve.

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