DIRECTIONAL VALVES
CV08-20 Check Valve
DESCRIPTION
A screw-in, cartridge-style, hydraulic check valve for use as a blocking or load-holding
device.
OPERATION
The CV08-20 allows fl ow passage from ➀ to ➁, while normally blocking oil fl ow in the
opposite direction.
The cartridge has a fully guided check which is spring-biased closed until suffi cient
pressure is applied at
➀ to open to ➁.
FEATURES
• Hardened seat for long life and low leakage.
• Optional bias springs for back-pressure application fl exibility.
• Fully guided check assembly.
• Compact size.
• Fast closing and seating.
RATINGS
Operating Pressure: 240 bar (3500 psi)
Proof Pressure: 350 bar (5075 psi)
Flow: See Performance Chart
Internal Leakage: 0.10 cc/minute (2 drops/minute) max. at 240 bar (3500 psi)
Crack Pressure Defi ned: Gauge psi evident at
➀ at 16.4 cc/minute (1 cu. in./minute)
attained
Standard Bias Springs at Crack: 0.3 bar (4 psi); 0.7 bar (10 psi); 1.7 bar (25 psi);
4.1 bar (60 psi)
Temperature: -40 to 120°C
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: VC08-2; See page 9.108.1
Cavity Tool: CT08-2XX; See page 8.600.1
Seal Kit: SK08-2X-T; See page 8.650.1
ISO:USASI:
PERFORMANCE (Cartridge Only)
SYMBOLS
4.010.1
6.9/100
5.2/75
3.4/50
1.7/25
7.5
2
15.1
4
22.7
6
30.2
8
FLOW lpm/gpm
PRESSURE DROP bar/psi
to
(with 0.7 bar/10 psi spring)
32 cSt/150 ssu oil at 40°C
➀➁
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CV08-20 - __ __ __ - __ - __ __
Cartridge: Weight: 0.08 kg. (0.17 lbs.)
Steel with hardened work surfaces.
Zinc-plated exposed surfaces.
Buna N O-rings and back-up
standard.
Standard Ported Body: Weight:
0.16 kg. (0.35 lbs.) Anodized high-
strength 6061 T6 aluminum alloy,
rated to 207 bar (3000 psi). Ductile
iron bodies available; dimensions
may differ. See page 8.008.1
CV08-20
MATERIALS
TO ORDER
Seals
N Buna N (Std.)
V Fluorocarbon
Porting
Cartridge Only 0
SAE 4 4T
SAE 6 6T
1/4 in. BSP* 2B
3/8 in. BSP* 3B
1/2 in. BSP* 4B
*BSP Body;
U.K. Mfr. Only
DIMENSIONS
4.010.2
Bias Spring
4 0.3 bar (4 psi)
10 0.7 bar (10 psi)
25 1.7 bar (25 psi)
60 4.1 bar (60 psi)
100 6.9 bar (100 psi)
150 10.3 bar (150 psi)
200 13.8 bar (200 psi)
270 18.3 bar (270 psi)
®
HYDRAFORCE
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