Valfonta's pressure reducing valve model PRV20 is a self-regulating, piston-balanced self-regulating, piston-balanceddesigned to provide a constant outlet pressure regardless of fluctuations in the inlet pressure.. It is a compact, robust and maintenance free solution, ideal for applications in chemical laboratories, sanitary plants and chemical laboratories, sanitary plants and compressed air systems..
Manufactured entirely in stainless steel AISI 316L (with option in bronze), its design allows the installation in any position any position and offers precise regulation by means of a direct-acting system.. The valve closes automatically when the outlet pressure rises above the set value..
- Dimensional Range: Available in 1/4", 3/8", 1/2" and 3/4" sizes.
- Maximum Inlet Pressure: Supports up to 40 barg.
- Regulating Range: Offers three adjustable output pressure ranges:
- 0.2 to 2 barg
- 1 to 8 barg
- 5 to 20 barg.
- Materials:
- Body and internals: Stainless Steel AISI 316L (1.4404) as standard (Bronze on request).
- Seals: Available in NBR, FKM and EPDM according to chemical and temperature compatibility.
- Connections: BSP or NPT threaded ends (other connections on request).
- Temperature limits: -20 °C to +80 °C (other ranges available on request).
The PRV20 model works by direct action. The inlet pressure tends to close the valve due to the section difference in the piston. When the spring is compressed by the adjusting screw, the closing assembly opens, allowing the fluid to flow through and the downstream pressure to be regulated..
When consumption ceases (zero flow), the valve absorbs the oscillations and maintains the static pressure according to the setting. If the outlet pressure exceeds the set value, the valve closes tightly..
- Mounting Position: It can be installed in any position, which facilitates its integration in confined spaces or complex piping.
- Filtration: It is advisable to install a strainer filter upstream of the valve to protect the seal and piston from impurities that may affect the regulation.
- Supports: Pipe supports should be made close to the valve, but never fixed directly to the valve body or actuator, to avoid mechanical stresses.
- Safety Valve: It is recommended to install a safety valve downstream, leaving a distance of 0.5 to 1 meter from the reducer for better compensation.
- Adjustment: Turn the upper screw clockwise to increase the outlet pressure and counterclockwise to decrease it.
