Mercer pressure relief valve installed in the field

Mercer Pressure Relief Valves

ASME Section XIII UV-Stamped Relief Valves for Gas and Liquid Service

Relief valves that hold their set pressure

A-Best Industrial is an authorized Mercer Valve distributor. Mercer pressure relief valves are built in Oklahoma City. Mercer's Auto Seat Technology® uses a low-rated, fully guided spring and a non-rising stem to hold set pressure consistently and extend valve life. Their soft-seat, pop-action spring valves reach full lift at set pressure, and their pilot-operated valves cover larger sizes and higher pressures. Every series is ASME Section XIII UV stamped.

Tell us your set pressure, media and size, and we'll help you pick the right valve. Full specs are on Mercer's product pages.

Spring-Operated Relief Valves

  • 9100 Series | Threaded

    Soft seat, high flow design with NPT connections.

    Set pressure: 10 – 3,500 psig
    Orifices: C, D, E, F, G, H, J, K
    Service: Air/gas and liquid

  • 9100 Series | Flanged

    The same soft seat, high flow design with flanged connections for larger capacities.

    Set pressure: 10 – 3,500 psig
    Orifices: C through P
    Service: Air/gas and liquid

  • 9100 Series | Model 20

    Built for CNG and other high-pressure applications.

    Set pressure: 3,000 – 8,700 psig
    Orifices: C, D
    Service: Air/gas and liquid

  • 8100 Series

    High flow design with a non-rising stem and smaller frame.

    Set pressure: 15 – 2,000 psig
    Orifices: E, G
    Service: Air/gas and liquid

  • 8500 Series

    Compact design for tight spaces.

    Set pressure: 15 – 1,650 psig
    Orifices: E
    Service: Air/gas

  • 1400 Series

    Compact valve for demanding high-pressure applications.

    Set pressure: 150 – 6,000 psig
    Orifices: B
    Service: Air/gas

Pilot-Operated Relief Valves

  • 9500 Series | Snap Pilot

    Pops fully open at set pressure for fast relief.

    Set pressure: 15 – 4,500 psig
    Orifices: D through T, plus full bore 1-1/2" to 8"
    Service: Air/gas

  • 9500 Series | Gas Modulating Pilot

    Opens the main valve gradually in proportion to overpressure, so it only relieves what it needs to.

    Set pressure: 15 – 4,500 psig
    Orifices: D through T, plus full bore 1-1/2" to 8"
    Service: Air/gas

  • 9500 Series | Liquid Modulating Pilot

    Modulating action that puts far less shock on a liquid system.

    Set pressure: 15 – 1,480 psig
    Orifices: F, H, J, L, M, P, R, T
    Service: Liquid

Options

  • Body & Trim

    Carbon steel or 316 stainless steel bodies, with 440C/17-4 or 316 stainless trim.

  • Seats & O-Rings

    FKM, PTFE, PEEK, Buna-N, EPDM, FFKM, Vespel® and more, matched to your media and temperature.

  • Sour Service

    NACE MR0175 sour service trim available.

  • Code Compliance

    ASME Section XIII UV stamped, with Canadian CRN and CE/PED options.

  • Weather Caps

    Protect the valve outlet from rain, dirt and debris.

Mercer Valves in the Field

  • Mercer relief valve in service

    Built for the Oilfield

    Mercer relief valves protect wellsites, compressors and production equipment.

  • Mercer relief valves on site

    Day and Night Protection

    Consistent set pressure, shift after shift.

  • Mercer relief valve, your last line of defense

    Your Last Line of Defense

    When pressure climbs, the relief valve is what keeps people and equipment safe.

Mercer 9100 Model 20 relief valve installed

Need a Relief Valve Sized?

Send us your set pressure, media, temperature, inlet and outlet size and required capacity, or the nameplate off the valve you're replacing. Call 310-833-3353 or email sales@abesttube.com. Open Monday–Friday, 8:00 AM–5:00 PM Pacific, with after-hours emergency service.

Request a Quote
Back to top