Relief Valves, High Pressure - MAR Series | Product Series

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Relief Valves, High Pressure - MAR Series

Relief Valves, High Pressure - MAR Series

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Parker’s MAR Series (Hard and Soft Seat) relief valves provide reliable venting of gases or liquids for set pressures from 1,500 PSI (103 BAR) minimum to 15,000 PSI (1034 bar).

Technical Specifications

  • Inlet Connection Size: 1/2" MNPT, 9/16" MNPT, 9/16" HP Cone & Thread
  • Outlet Connection Size: 1/2" FNPT
  • Orifice Size: 0.312, 0.250, 0.188, .0188, 0.156 inch
  • Minimum Operating Pressure: 3000, 5000, 10000, 15000, 1500 psi
  • Maximum Operating Pressure: 5000, 10000, 15000, 20000 psi
  • Maximum Operating Temperature: 400 °F
  • Minimum Operating Temperature: -423, 32 °F
Safety Warning

Full Product Description

Parker's MAR Series Relief Valves offer two distinct designs for systems up to 15,000 PSI (1034 bar). One is a hard seat relief valve and the other is a soft seat relief valve. Parker’s MARA Series (Hard 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 (1034 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.

These precision valves are designed for pressure gas systems, where zero leakage is critical. They are not recommended for liquid nitrogen or liquid carbon dioxide, which produce gas at cryogenic temperatures upon relief. Relief valves are designed to open proportionally to increasing pressure. Therefore, they are not recommended for applications requiring immediate full valve flow at set pressure (such as decompositions, polymerizations, etc.). Full flow of relief valve is defined at 10% over set pressure.

Parker’s MARSA Series (Soft Seat) relief valves utilize a soft seat design for reliable venting of gases at set pressures from 1,500 psi (103 bar) to 15,000 psi (1034 bar). The operating temperature range is 32ºF (0ºC) to 400ºF (204ºF). The soft seat design provides bubble tight sealing, repeatable pop-off, and reseat. Additionally, soft seat valves provide a higher cycle life than metal seat relief valves. These precision valves are designed for pressure gas systems, where zero leakage is critical. They are not recommended for liquid nitrogen or liquid carbon dioxide, which produce gas at cryogenic temperatures upon relief. Relief valves are designed to open proportionally to increasing pressure. Therefore, they are not recommended for applications requiring immediate full valve flow at set pressure (such as decompositions, polymerizations, etc.). Full flow of relief valve is defined at 10% over set pressure.


Markets:

• Chemical Processing
• Petrochemical
• Research
• Power


Features/Benefits:
• Hard and Soft Seat designs
• NPT High Pressure End Connections
• Heat code traceability
• High Cycle Life
• Large Filter Areas

Applications:

• Process Control Lines
• Pressure Gas Systems
• High Pressure Equipment Protection
• Cryogenic Systems


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Products Seat Type Material Inlet Connection Outlet Connection Orifice Size Minimum Working Pressure (psi) Maximum Working Pressure (psi) Maximum Working Temperature (F) Minimum Working Temperature (F)
8MP712F-MARA-10000-2507 Metal Seat Super Duplex 1/2" MPI 3/4" FNPT 0.188 10000 15000 400 -423
9MP712-MARA-3000-2507 Metal Seat Super Duplex 9/16" MPI 3/4" FNPT 0.188 3000 5000 400 -423
9MP712-MARA-5000-2507 Metal Seat Super Duplex 9/16" MPI 3/4" FNPT 0.188 5000 10000 400 -423
9MP712-MARA-10000-2507 Metal Seat Super Duplex 9/16" MPI 3/4" FNPT 0.188 10000 15000 400 -423
8MP712F-MARSA-1500-SS Soft Seat Stainless Steel 1/2" MPI 3/4" FNPT 0.156 1500 5000 400 -50
8MP712F-MARSA-5000-SS Soft Seat Stainless Steel 1/2" MPI 3/4" FNPT 0.156 5000 10000 400 -50
8MP712F-MARA-5000-2507 Metal Seat Super Duplex 1/2" MPI 3/4" FNPT 0.188 5000 10000 400 -423
8MP712F-MARSA-10000-SS Soft Seat Stainless Steel 1/2" MPI 3/4" FNPT 0.156 10000 15000 400 -50
9MP712F-MARSA-5000-SS Soft Seat Stainless Steel 9/16" MPI 3/4" FNPT 0.156 5000 10000 400 -50
9MP712F-MARSA-10000-SS Soft Seat Stainless Steel 9/16" MPI 3/4" FNPT 0.156 10000 15000 400 -50
8MP712F-MARSA-1500-2507 Soft Seat Super Duplex 1/2" MPI 3/4" FNPT 0.156 1500 5000 400 -50
8MP712F-MARSA-5000-2507 Soft Seat Super Duplex 1/2" MPI 3/4" FNPT 0.156 5000 10000 400 -50
8MP712F-MARSA-10000-2507 Soft Seat Super Duplex 1/2" MPI 3/4" FNPT 0.156 10000 15000 400 -50
9MP712F-MARSA-1500-2507 Soft Seat Super Duplex 9/16" MPI 3/4" FNPT 0.156 1500 5000 400 -50
9MP712F-MARSA-1500-SS Soft Seat Stainless Steel 9/16" MPI 3/4" FNPT 0.156 1500 5000 400 -50
8MP712F-MARA-3000-2507 Metal Seat Super Duplex 1/2" MPI 3/4" FNPT 0.188 3000 5000 400 -423
9MP712-MARA-10000-SS Metal Seat Stainless Steel 9/16" MPI 3/4" FNPT 0.188 10000 15000 400 -423
9MP712-MARA-5000-SS Metal Seat Stainless Steel 9/16" MPI 3/4" FNPT 0.188 5000 10000 400 -423
8MP712F-MARA-3000-SS Metal Seat Stainless Steel 1/2" MPI 3/4" FNPT 0.188 3000 5000 400 -423
8MP712F-MARA-5000-SS Metal Seat Stainless Steel 1/2" MPI 3/4" FNPT 0.188 5000 10000 400 -423
8MP712F-MARA-10000-SS Metal Seat Stainless Steel 1/2" MPI 3/4" FNPT 0.188 10000 15000 400 -423
9MP712-MARA-3000-SS Metal Seat Stainless Steel 9/16" MPI 3/4" FNPT 0.188 3000 5000 400 -423
9MP712F-MARSA-5000-2507 Soft Seat Super Duplex 9/16" MPI 3/4" FNPT 0.156 5000 10000 400 -50
9MP712F-MARSA-10000-2507 Soft Seat Super Duplex 9/16" MPI 3/4" FNPT 0.156 10000 15000 400 -50

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