Masoneilan 3" Model 88U-25125 Diaphragm Control Valve | 2" Body | 150 ANSI | SVI-2 Valve Positioner | Air Filter Regulator

What pressure, flow and temperature is it rated for?

The valve body is rated for 150 ANSI (typically 285 psig at standard temperatures for carbon or stainless steel). Flow capacity and temperature limits are not provided in the listing—contact the seller for the valve's Cv rating, trim style, and material temperature range. Diaphragm control valves of this type typically handle temperatures from -20°F to 450°F depending on diaphragm material and body construction.

What materials are the wetted parts?

The valve body is constructed in 316 SS. The listing does not specify trim material, diaphragm composition, or seal materials—contact the seller for details on the plug, seat, stem, and diaphragm to confirm compatibility with your process media.

What should I inspect before putting it into service?

The seller states this unit must be re-serviced before use. At minimum, inspect the diaphragm for cracks or stiffness, check the seat and plug for erosion or damage, verify stem packing integrity, and confirm the positioner responds correctly across its signal range. Bench test for seat leakage per ANSI/FCI 70-2 and calibrate the SVI-2 positioner to your control signal—diaphragm valves often require trim replacement and actuator recalibration after storage.