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September 02,2026
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RGFALCN
Name: Low-pressure-range, direct-acting relief valve - RGFALCN Description: Direct-acting relief cartridges are normally closed, pressure-limiting valves used to protect hydraulic components from pressure transients. When the pressure at the inlet (port 1) reaches the valve setting, the valve starts to open to tank (port 2), throttling flow to limit the pressure rise.
All 2-port relief cartridges (except pilot reliefs) are physically and functionally interchangeable (same flow path, same cavity for a given frame size).
Will accept maximum pressure at port 2; suitable for use in cross port relief circuits. If used in cross port relief circuits, consider spool leakage.
Not suitable for use in load holding applications due to spool leakage.
Back pressure on the tank port (port 2) is directly additive to the valve setting at a 1:1 ratio.
Corrosion resistant cartridge valves are intended for use in corrosive environments and are identified by the model code suffix /AP for external stainless steel components, or /LH for external zinc-nickel plated components. See the CONFIGURATION section for all options. For further details, please see the Materials of Construction page located under TECH RESOURCES.
Incorporates the Sun floating style construction to minimize the possibility of internal parts binding due to excessive installation torque and/or cavity/cartridge machining variations.
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1_3to1_6
1_8to1
20gpm
350bar
5000psi
80lpm
adjustablerelief
backpressureadditive
bidirectional
bunaseals
cartridgevalve
clampingsystems
commoncavity
contaminationresistant
corrosionresistant
crossportrelief
cylinderratio
differentialarea
differentialratio
directacting
directionalratio
dirttolerant
dualcylinderclamping
epdmseals
fastresponse
fatiguerated
floatingstyle
functionaltested
hydrauliccartridge
hydraulicvalve
industrialhydraulics
mineraloil
mobilehydraulics
multiplespringranges
nfpastandard
nobinding
normallyclosed
petroleumfluids
phosphateester
poppettype
pressurecontrol
pressurelimiting
pressureremovedtoadjust
quietoperation
rbuy
reliefvalve
reseat80percent
sc1002cavity
screwadjustment
smoothoperation
sunhydraulics
temperatureinsensitive
transientprotection
vitonseals
zincnickelplating