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Parker’s MARA series (Metal Seat) relief valves provide reliable venting of gases or liquids for set pressures from 3,000 psi (206.8 bar) minimum to 15,000 psi (1035 bar). The standard temperature range for all models is -423ºF to 400ºF (-252ºC to 204ºC). A high temperature option to 750ºF (400ºC) is also available. These precision valves are designed for pressure gas systems, cryogenic systems, petrochemical applications and other special systems.

Capable of handling air, gases, steam,more
Unit of Measure

Dimensions

Connection

 MPI™ to FNPT

Size

 1/2 x 3/4

Orifice Diameter

 .188 in

Pressure Rating [Min]

 5000 psi345 bar

Pressure Rating [Max]

 10000 psi690 bar

Back Pressure [Max]

 500 psi34 bar

A

 10.62 in

Repair Kits

 R8MARA-10K

Specifications

Caution
  1. Parker Relief Valves are preset and factory sealed. Warranty is voided if seal is broken by customer.
  2. 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.
  3. 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.