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F7000/F8000 Pilot Operated Safety Relief Valve
F7000/F8000 Pilot Operated Safety Relief Valve

IACS Approved Offshore/Marine Class



·         Choice of modulating or snap acting, flowing or non-flowing pilot

·         Soft seated (Elastomer or Plastic)

·         Backflow preventer & field test connection (quick-connect)

·         Full bore (F7000) or reduced bore (F8000) orifice

·         Full piston lift @ set pressure

·         Pilot vents to process (F100, F300, F500) or atm. (F200)

·         Leak tight seating and re-seating

·         Integral flange design

·         Integral nozzle (SS), 316/316L corrosion resistant trim



·         Ambient or cryogenic fluids

·         Chemical processing

·         High cycle rates / long service life

·         Minimal product loss importance

·         Operation close to set point with zero leakage required



Connection Sizes

Custom sizes & dual outlet bodies available on request

1” x 2” - 12” x 16”

(25mm x 50mm - 300mm x 400 mm)

Set Pressure Ranges

See F7000/8000 Catalog for orifice specific ratings

15 – 6,000 psig

(1.03 - 413 barg)

Temperature Ranges

-423 to 525°F

(-252 to 274°C)

Orifice Area Range

.134 – 111.87 in2

(86 – 72174 mm2)

End Connections

Custom types available on request


Female NPT (1” x 2” & 1.5” x 3” size only)

Integral ASME RF Flanged (up to 2500# inlet)


DIN flanged (EN 1092-1), Grayloc, MS33649/AS5202

Materials of Construction

Custom available for service or on request

Carbon Steel, Stainless Steel, Monel, Inconel,

Hastelloy C / C22 / C276, Duplex 22% or 25% Cr

Seat Materials

Custom available for service or on request

F7040/F8040 Material (Plastic):

Teflon®, Ekonol-filled PTFE, Kel-F (PCTFE),

PI/PAI (Vespel®, Duratron®, or equal), PEEK


F7050/F8050 Material (Elastomer):

Buna-N, Viton® (FKM) or equal, EPR/EPDM, Aflas,

FFKM (Chemraz®, Kalrez®, etc), Polyurethane, HNBR


·         ASME Sec VIII Div. 1 (NB-18 Cert. No. 28000, 28011, 28022, 28099, 28156)

·         ISO 9001-2015

·         IGC Code Sizing (Air @ 0°C)

·         ABS Product Design Assessment (Cert. No. 16-HS1495073-PDA)

·         BV Mode 1 & Type Approval

·         DNV-GL Type Approval

·         LR Design Appraisal Document F7100/8100, F8200, F8300, F8500

·         US Coast Guard Certificate

·         Cryogenic testing per ISO 21013:1(2008)