Pressure Control Valves

CR10-28 — Relief Valve, Bi-Directional
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CR10-28 Valve

U.S. Patent 7,069,945

SYMBOL:
CR10-28 Valve symbol

DESCRIPTION
A screw-in, cartridge-style, direct-acting, differential area, poppet-type, bi-directional relief valve.

OPERATION
The CR10-28 is a direct-acting, dual cross-over relief valve in a single cartridge format.
When pressure at either port exceeds the nominal setting value, flow will be transmitted
to the opposite port. Back pressure at either port will affect the nominal setting of the
opposite port on a 1:1 basis.For correlation purposes, pre-set value will be measured at
port 2. Pressure at port 1 will not exceed ±150 psi from the port 2 value.

FEATURES
• Adjustments cannot be backed out of the valve.
• Adjustments prohibit springs from going solid.
• Hardened spool and cage for long life.
• Industry-common size.

RATINGS:
Operating Pressure: up to 240 bar (3500 psi)
Adjustable Pressure Range: 14 – 210 bar (200 – 3000 psi); 2 springs; Pressure is set at port 2

Proof Pressure: 345 bar (5000 psi)
Reseat Pressure: 90% of crack (crack pressure at 0.95 lpm/0.25 gpm)
Maximum Difference for Crack Pressure in Both Directions: 10.5 bar (150 psi)
Flow: up to 60 lpm (16 gpm); see performance chart
Internal Leakage: when reseat to 80% of crack pressure: 33 ml/minute (2 cu. in./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: VC10-2; See page 9.110_2w
Cavity Tool: CT10-2xx; See page 8.600.1
Seal Kit: SK10-2x-B; See page 8.650.1

PERFORMANCE:

CR10-28 Flow-Pressure

  DIMENSIONS:
CR10-28 Valve Dimensions

MATERIALS:

Cartridge: Weight: 0.22 kg (0.5 lb);
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: 0.16 kg (0.35 lb); Anodized high-strength 6061 T6 aluminum alloy, rated to 207 bar (3000 psi); Ductile iron bodies available; dimensions may differ.
See page 8.010_2w.

Adjustment Option Details:

See page 6.003.1
Note: Orifice Disc should not be used with this product.
  ORDERING CHART:

CR10-28 Ordering Chart

Selection guide - similar valves.
PDF file of this page. STP file for CR10-28 Request a quote.