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.

Ratings

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)

Operating Parameters

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

Properties

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

Performance

CR10-28_Flow-Pressure

Dimensions

CR10-28_Dim

Materials

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.

Adjustment Option Details: See adjustment options

Note: Orifice Disc should not be used with this product.

Installation Specifications

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

Accessories

Seal kit:
  • SK10-2X-M X = seal option

Order Code

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