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Direct Spring, Conventional – ASME code (F84/F85)
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Overpressure Protection

Direct Spring, Conventional

F84M / F84 (Plastic Seated): Gas & Vapor Service

Enhanced performance conventional style SRV’s. Made in accordance with ASME Section XIII. “CE” or “UKCA” marks available. Available in brass, carbon, and stainless steel materials as standard. Special alloy construction available upon request. A variety of seat materials and connection styles available. F80M series small orifice devices are ideal for instrumentation panels, line blocks on cryogenic storage tanks, or thermal relief applications.

 

FEATURES

  • Spring-operated, snap-acting 
  • Soft seated (Plastic) 
  • Full lift at set pressure 
  • Bubble tight seating and re-seating, factory tested per API 527
  • Adjustable blowdown 
  • Integral / full nozzle, corrosion resistant trim 
  • Packed lift lever available on most sizes 
  • Unbalanced against backpressure 

 

APPLICATIONS

  • Compressors 
  • Full lift at set pressure 
  • Bubble tight seating and re-seating 
  • Adjustable blowdown 
  • Integral / full nozzle, corrosion resistant trim 
  • Packed lift lever available on most sizes 
  • Unbalanced against backpressure 

Service Envelope

Connection Sizes
Larger sizes available on request		¼” x ½” – 2” x 3”
(6mm x 13mm – 50mm x 75 mm)
Set Pressure Ranges
See F80 Catalog for orifice specific ratings		15 - 10,313 psig
(1.03 - 711 barg)
Temperature Ranges
-65 to 525°F
(-54 to 274°C)
Orifice Area Range.003 – 1.689 in2
(1.9 – 1089 mm2)
End Connections
Custom types available on request		Threaded: NPT, SAE, MS33649/AS5202, AN 37° Flare
Welded: ASME / DIN / API / SAE flanged, Grayloc
Specialty: Swagelok® Tube / VCR, Threaded & Coned
Materials of Construction
Custom available for service or on request		Carbon Steel, Stainless Steel, Brass, Monel, Hastelloy C / C22 / C276, Duplex 22% or 25% Cr
Seat Materials
Custom available for service or on request		Elastomer: Nitrile (Buna-N), Fluoroelastomer (Viton®), Ethylene Propylene (EPR/EPDM), FFKM (Perfluuoroelastomer - Chemraz®, Kalrez®, Perlast®, or equivalent), Polyurethane, and others (upon request)

CERTIFICATIONS & COMPLIANCE

  • ASME Sec XIII (NB-18 Cert. No. 28066)
  • API 520 (Sizing & Selection of PRV’s) / API 527 (Seat tightness of PRV’s)
  • Superior flow capability (KA factor) vs. equivalent API 526 orifice
  • API 526 center-to-face dimensions available on most sizes
  • NACE MR0175 H2S compliant materials available on request
  • PED / CE (2014/68/EU) compliant on request
  • Canadian CRN (all Provinces per CSA B51)
  • PER/UKCA complaint or request
PRODUCT CATEGORIES
Overpressure Protection | Pressure Relief Valves
APPLICABLE REGIONS
Africa | Asia Pacific | China | Europe | Latin America | Middle East | North America | United Kingdom
DOWNLOADS

F84L Manual

F84L Manual – Spanish

F84/F85/F88 Spring Operated Safety Relief Valves (Gas Service) Catalog

F84L/F88 Spring Operated Safety Relief Valves  (Liquid Service) Catalog

F85M / F85 (Elastomer Seated): Gas & Vapor Service

Enhanced performance conventional style SRV’s. Made in accordance with ASME Section XIII. “CE” or “UKCA” marks available. Available in brass, carbon, and stainless steel materials as standard. Special alloy construction available upon request. A variety of seat materials and connection styles available. F80M series small orifice devices are ideal for instrumentation panels, line blocks on cryogenic storage tanks, or thermal relief applications.

FEATURES

  • Spring-operated, snap-acting
  • Soft seated (elastomer)
  • Full lift at set pressure
  • Bubble tight seating and re-seating
  • Adjustable blowdown
  • Integral / full nozzle, corrosion resistant trim
  • Packed lift lever available on most sizes
  • Unbalanced against backpressure

APPLICATIONS

  • Compressors
  • Thermal relief / instrument panels (see F84M Series)
  • Storage Tanks
  • Air/gas equipment or processes
  • Flashing cryogenic fluids

    Service Envelope

    Connection Sizes
    Larger sizes available on request    		¼” x ½” – 2” x 3”
    (6mm x 13mm – 50mm x 75 mm)
    Set Pressure Ranges
    See F80 Catalog for orifice specific ratings    		15 - 10,313 psig
    (1.03 - 711 barg)
    Temperature Ranges
    -65 to 525°F
    (-54 to 274°C)
    Orifice Area Range.003 – 1.689 in2
    (1.9 – 1089 mm2)
    End Connections
    Custom types available on request    		Threaded: NPT, SAE, MS33649/AS5202, AN 37° Flare
    Welded: ASME / DIN / API / SAE flanged, Grayloc
    Specialty: Swagelok® Tube / VCR, Threaded & Coned
    Materials of Construction
    Custom available for service or on request    		Carbon Steel, Stainless Steel, Brass, Monel, Hastelloy C / C22 / C276, Duplex 22% or 25% Cr
    Seat Materials
    Custom available for service or on request    		Elastomer: Nitrile (Buna-N), Fluoroelastomer (Viton®), Ethylene Propylene (EPR/EPDM), FFKM (Perfluuoroelastomer - Chemraz®, Kalrez®, Perlast®, or equivalent), Polyurethane, and others (upon request)

    CERTIFICATIONS & COMPLIANCE

    • ASME Sec XIII (NB-18 Cert. No. 28066)
    • API 520 (Sizing & Selection of PRV’s) / API 527 (Seat tightness of PRV’s)
    • Superior flow capability (KA factor) vs. equivalent API 526 orifice
    • API 526 center-to-face dimensions available on most sizes
    • NACE MR0175 H2S compliant materials available on request
    • PED / CE (2014/68/EU) compliant on request
    • Canadian CRN (all Provinces per CSA B51)
    • PER/UKCA complaint on request

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