Model PRS-06

PRESSURE-REDUCING VALVE

Printable Product Specs PDF Instructions Pricing

Spring-diaphragm operated 3/8"-1" NPT THD (can also be special ordered flanged 1/2' & up) Max Recommended Inlet pressure to 150 PSI (~10 Bar) based on diaphragm limitation Outlet pressures to 80 PSI (5.5 Bar) (multiple spring ranges)

Features Pressure-containing parts made from solid bar stock materials — unlike castings which have wall thickness variations. Body: Standard materials are stainless steel, steel, and brass. Special alloys (e.g. Monel, titanium, and Hastelloy) also available. Trim: Stainless steel for valve seat holder and internal valve spring is standard. Main valve is stainless steel. Special alloys also available, same as body. Elastomeric diaphragm is reinforced and has a 300 psi (~20 bar) burst pressure rating permits maximum travel for high capacity. Available in Teflon (standard), Viton, and EPDM. In-line porting allows for simplified piping installation.

Applications

Valve can be used for non-corrosive or mildly corrosive fluids, depending on the materials selected (consult factory). When liquids or gases contain debris or other solid matter which might cause internal clogging or improper operation of the valve, a strainer with a fine wire mesh should be installed before the inlet of the valve. In-line strainer fittings STF-05 or basket strainer models SBS-10 or SBV-05 can be purchased from Stra-Val to solve this problem.

This valve is similar to the model PRS-05 or PRS-05-1, except that it can pass a much higher capacity because of the greater travel produced with the elastomeric diaphragm compared to a metal one. This valve will work quite well on applications where the inlet pressure will not fluctuate widely. However, where the condition does exist and the outlet pressure needs to be controlled closely, a pressure-reducing valve with a balanced design is recommended such as the Stra-Val model PRS-09i.

Although the diaphragm has a 300 psi burst pressure limit, when the inlet pressure exceeds 80 psi (5.5 bar) a relief valve located on the outlet side of the valve is strongly recommended in case the seat is unable to hold back the full inlet pressure. This will assure that the diaphragm will not be subjected to excessive pressure which may cause it to fail prematurely. 

 

Options

Principle of Operation

This is a direct-acting pressure-reducing valve with an adjustable spring operating against a flexible stainless steel diaphragm subjected to the reduced outlet pressure of the valve. With the spring completely uncompressed and adjusting screw backed out, the inlet pressure will close the main valve and keep it shut. This will shut off flow and reduce the outlet pressure to zero if the valve seat is sealing effectively.

Downstream sensing pressure is achieved with an internal sensing port, but can be supplied with an external means as an option.

Customized Pricing & Ordering Information ($USD)

To show prices: Click on a size:	3/8" PRS06-03T (call for pricing)	1/2" PRS06-05T	3/4" PRS06-07T	1" PRS06-10T
To price or order, first select a size above.