Valves - Pressure Controls - Relief Valve - Crossover

CR10-28

RELIEF VALVE, BI-DRECTIONAL

Overview

Description

CR10-28 is a screw in, cartridge style, direct-acting, differential area, poppet type, bidirectional hydraulic relief valve.

Operation

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.

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.
Pressure Ratings
Pressure rating:
  • 241.3 bar (3500 psi)
Proof pressure:
  • 345.6 bar (5000 psi)
Burst pressure:
  • 896.3 bar (16000 psi)
Reseat pressure:
  • 90% of crack pressure at
  • 0.95 lpm (0.25 gpm)
Crack pressure:
  • 10.5 bar (150 psi) Maximum difference both directions
Flow Ratings
Flow rating:
  • 60 lpm (16 gpm)
Maximum internal leakage:
  • 33 ml/min (2 in³/min) When reseat to 80% of crack pressure
Temperature Ratings
Operating fluid temperature:
  • -40 to 100 °C (-40 to 212 °F) With buna N seals
  • -26 to 204 °C (-15 to 400 °F) With fluorocarbon seals
  • -54 to 107 °C (-65 to 225 °F) With polyurethane seals
Storage temperature:
  • -40 to 70 °C (-40 to 160 °F)
Ambient temperature:
  • -40 to 70 °C (-40 to 160 °F)
Fluids:
  • Mineral based or synthetic with lubricating properties
Fluid viscosity range:
  • 7.4 to 420 cSt
Maximum operating contamination level:
  • 18/16/13 per ISO 4406
Unit weight:
  • 0.25 kg (0.55 lb) CR10-28A
  • 0.28 kg (0.61 lb) CR10-28B
  • 0.29 kg (0.65 lb) Cr10-28c/l
  • 0.24 kg (0.53 lb) Cr10-28f/h
Internal wetted surface area:
  • 193 cm² (29.9 in²) Cr1028a/b/c/l
  • 189 cm² (29.3 in²) Cr1028f/h
CR10-28_Flow-Pressure(2022-02-24)
CR10-28_Dim(2022-02-24)
Cavity:
Cartridge installation torque:
  • 33.9 to 36.6 N-m (25 to 27 ft-lb)
  • 68 N-m (50 ft-lb)
Plug torque:
  • 33.9 N-m (25 ft-lb)
Orientation restriction:
  • None
Seal kit:
  • SK10-2X-M X = seal option
CR10-28_Order(2022-02-24)

Model Options

CR10-28F-H-J-R/S
F Adjustment Option
CODE
DESCRIPTION
A
1/4" Hex Allen Head
B
1-1/2" Diameter Aluminum Knob with Aluminum Lock Knob
C
1/4" Hex Allen Head with Cover Cap
F
Factory Preset Non-Adjustable
H
Factory Preset Hidden Adjustment
L
1/4" Hex Allen Head with Cover Cap and Lockwire Holes
H Line Body
CODE
DESCRIPTION
0
No Body
6T
Aluminum SAE 6
8T
Aluminum SAE 8
6TD
Ductile Iron SAE 6
8TD
Ductile Iron SAE 8
2B
Aluminum BSPP 1/4" (2)
3B
Aluminum BSPP 3/8" (3)
4B
Aluminum BSPP 1/2" (4)
4BD
Ductile Iron BSPP 1/2" (4)
J Seal
CODE
DESCRIPTION
N
Buna-N
V
Fluorocarbon
P
Polyurethane
U
PPDI Urethane
R Spring
CODE
DESCRIPTION
24
14 to 168 bar (200 to 2400 psi) Spring Range
30
160 to 210 bar (2300 to 3000 psi) Spring Range
S Setting
CODE
DESCRIPTION
MXXX
Spring Setting in XXX bar
XX
Spring Setting in XX psi (x 100)