Pressure Control ValvesCR08-38 — Relief Valve, Bi-Directional, Vented |
Selection guide - similar valves. PDF file of this page. STP file for CR08-38. Request a quote. |
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DESCRIPTION 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. OPERATION 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. FEATURES • Adjustments cannot be backed out of the valve. • Adjustments prohibit springs from going solid. • Hardened parts for long life. • Compact, industry-common size. RATINGS: Operating Pressure: up to 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: 90% of crack (crack pressure at 0.96 lpm/0.25 gpm) Maximum Difference for Crack Pressure in Both Directions: 20.7 bar (300 psi) Flow: up to 30 lpm (8 gpm); see performance chart Internal Leakage: when reseat to 75% of crack pressure: 0.4 cc/minute (8 drops/minute) max. Cycle Limitations: Internal seal life limited to 300,000 cycles in either direction at max. setting Temperature: -40° to 100°C (-40° to 212°F) with Buna seals; -26° to 204°C (-15° to 400°F) with Fluorocarbon 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_3w Cavity Tool: CT08-3xx; See page 8.600.1 Seal Kit: SK08-3x-BM; See page 8.650.1 |
PERFORMANCE:
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DIMENSIONS:![]() |
MATERIALS: Cartridge: Weight: 0.14 kg. (0.30 lbs.); Steel with hardened work surfaces. Zinc-plated exposed surfaces; Buna N O-rings and TFE back-up standard. Anodized aluminum knobs. Standard Ported Body: Weight: 0.27 kg. (0.60 lbs.); Anodized high-strength 6061 T6 aluminum alloy, rated to 207 bar (3000 psi); Ductile iron bodies available; dimensions may differ. See page 8.008_3w. Adjustment Option Details: See page 6.003.1 Note: Orifice Disc should not be used with this product. |
ORDERING CHART:
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Selection guide - similar valves. |
PDF file of this page. | STP file for CR08-38 | Request a quote. |