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.

Ratings

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)

Operating Parameters

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

Properties

Unit weight
0.05 kg (0.12 lb)
Internal wetted surface area
61.3 cm² (9.5 in²)

Performance

CV08-21_Perf_Chrt

Dimensions

CV08-20_Dim_Dwg

Materials

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.

Installation Specifications

Cavity
VC08-2
Cartridge installation torque
25.8 to 28.5 N-m (19 to 21 ft-lb)
Orientation restriction
None

Accessories

Seal kit
SK08-2N-B Buna N
SKO8-2N-B Fluorocarbon
SK08-2U-0 Urethane

Order Code

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
CV08-21_Order