MARSA Soft Seat Relief Valve - MPI™ Specialty Valves and Filters
MARSA Soft Seat Relief Valve - MPI™ Specialty Valves and Filters
SKU:VAL-890e31
Reliable MARSA Soft Seat Valve for gas systems, offering bubble-tight sealing and precise pressure control, ideal for critical applications.
Regular price
$399.99
Regular price
Sale price
$399.99
Unit price
per
Delivery via Maden
Expect your order to arrive on time.
Secure Payments
All orders are processed through a secure, PCI-compliant checkout.


The MARSA Soft Seat Relief Valve is a precision-engineered solution for gas systems, offering reliable venting at pressures ranging from 1,500 psi to 15,000 psi. Designed with a soft seat for bubble-tight sealing and enhanced cycle life, this valve ensures repeatable pop-off and reseat functionality. Operating in temperatures from -50ºF to 400ºF, it provides dependable performance critical for applications requiring zero leakage. Not recommended for cryogenic liquids, this factory-set valve maintains accuracy within +/-3% of setpoint, making it ideal for pressure gas systems demanding high reliability and safety.
Product Specifications
Dimensions A
10.62 in
Dimensions Back Pressure Max
500 psi | 34 bar
Dimensions Connection
MPI™ to FNPT
Dimensions Orifice Diameter
.156 in
Dimensions Pressure Rating Max
5000 psi | 345 bar
Dimensions Pressure Rating Min
1500 psi | 103 bar
Dimensions Repair Kits
R9MARSA-5K
Dimensions Size
9/16 x 3/4
Specifications Caution
Parker Relief Valves are preset and factory sealed. Warranty is voided if seal is broken by customer. Maximum system operating pressure should not exceed 90% of relief valve set pressure. Pressures in excess of this value may cause weepage resulting in damage to plug and seat. Care should be taken when locating a relief valve within a piping system to keep the relief valve as far from the pump as possible. Certain pumps create an end-of-stroke spike in pressure that is not detectable by common instrumentation. These spikes could cause premature failure of the relief valve.