Valves - Directional Controls - Check Valve

CV08-21

CHECK VALVE

Overview

Description

The CV08-21X is a screw-in, cartridge style, hydraulic check valve for use as a blocking or load-holding device

Operation

The cartridge valve allows flow from port 2 to 1, while normally blocking flow in the opposite direction. The cartridge valve has a fully guided check, which is spring biased closed until sufficient pressure is applied at port 2 to open to port 1

Features

  • Hardened seat for long life and low leakage.
  • Fully guided poppet.
  • Compact size.
Pressure Ratings
Pressure rating:
  • 241 bar (3500 psi)
Flow Ratings
Flow rating:
  • See graph
Maximum internal leakage:
  • 0.10 ml/min (2 drops/min) At 241 bar (3500 psi)
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 urethane seals
Storage temperature:
  • -40 to 70 °C (-40 to 160 °F)
Ambient temperature:
  • -40 to 90 °C (-40 to 194 °F)
Other Ratings
Corrosion protection:
  • 960 hr salt spray per ASTM b117 (gcv08-21x)
Fluids:
  • Mineral based or synthetic hydraulic fluid with lubricating properties
Fluid viscosity range:
  • 7.4 to 420 cSt
Maximum operating contamination level:
  • 20/18/14 per ISO 4406
Unit weight:
  • 0.05 kg (0.12 lb)
Internal wetted surface area:
  • 61.3 cm² (9.5 in²)
CV08-21_Perf_Chrt
CV08-20_Dim_Dwg

Materials

Cartridge: Weight: 0.05 kg (0.12 lb); Steel with hardened work surfaces. Zinc-plated exposed surfaces; Buna N O-rings and back-ups standard.

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.

Cavity:
Cartridge installation torque:
  • 25.8 to 28.5 N-m (19 to 21 ft-lb)
Orientation restriction:
  • None
Seal kit:
  • SK08-2N-B Buna N
  • SKO8-2N-B Fluorocarbon
  • SK08-2U-0 Urethane
CV08-21_Order
POSITION
CODE
DESCRIPTION
CV08-21G-H-J-R
G
Screen
G
BLANK
NONE
G
S
100 Mesh Screen
H
Line Body
H
0
No Body
H
4T
Aluminum SAE 4
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
3BD
Ductile Iron BSPP 3/8" (3)
J
Seal
J
N
Buna-N
J
V
Fluorocarbon
J
P
Polyurethane
J
U
PPDI Urethane
R
Spring
R
30
30 psi Bias Spring