CR08-38 Bi-Directional Relief Valve, Vented (CR08-38)

A screw-in, cartridge-style, direct-acting, differential area, poppet-type, bi-directional relief valve, intended for use as a pressure limiting device in demanding hydraulic circuits.

The CR08-38 is a direct-acting, dual cross-over relief valve in a single cartridge format. It blocks flow from 1 to 2 bi-directionally, with the spring chamber constantly drained at 3.
On attainment of a pre-determined pressure at either 1 or 2, the poppet is forced from its seat. Back pressure on port 3 will affect the nominal setting on a 2:1 basis.
NOTE: If pressure is applied simultaneously at port 1 and port 2, the pressure isadditive and may cause the valve to shift at a pressure lower than the pre setpressure setting.

Product Features

 Adjustments cannot be backed out of the valve.
 Adjustments prohibit springs from going solid.
 Hardened parts for long life.
 Industry common cavity.

Product Ratings

Maximum Operating Pressure: 205 bar (3000 psi)
Adjustable Pressure Range: 68–205 bar (1000–3000 psi); Pressure is set at port 2
Proof Pressure: 345 bar (5000 psi)
Reseat Pressure: 80% of Crack; Crack: 0.96 lpm (0.25 gpm)
Maximum Difference for Crack Pressure in Both Directions: 20.7 bar (300 psi)
Flow Range: 30 lpm (8 gpm); See performance chart
Maximum Internal Leakage: When reseat to 75% of crack pressure: 0.4 cc/minute (8 drops/minute maximum)
Cycle Limitations: Internal seal life is limited to 300,000 cycles in either direction at maximum setting
Temperature: -40 to 120°C with Buna N seals
Filtration: See page 9.010.1
Fluids: Mineral-based or synthetics with lubricating properties at viscosities of 7.4 to 420 cSt (50 to 2000 sus); See Temperature and Oil Viscosity, page 9.060.1
Installation: No restrictions; See page 9.020.1
Cavity: VC08-3; See page 9.108.1
Cavity Tool: CT08-3XX; See page 8.600.1
Seal Kit: SK08-3X-BM; See page 8.650.1

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