DIRECTIONAL VALVES
CV10-28 Check Valve with Thermal Relief
DESCRIPTION
A screw-in, cartridge-style, hydraulic check valve for use as a blocking or load-holding
device. The cartridge incorporates a low fl ow thermal relief valve intended to prevent
cylinder damage resulting from temperature-induced pressure intensifi cation.
OPERATION
The CV10-28 allows fl ow from ➀ to ➁, while blocking oil fl ow in the opposite direction.
If the pressure at
➁ exceeds the thermal relief valve setting, a small amount of oil will
be allowed to pass from
➁ to ➀, preventing cylinder damage from pressure
intensifi cation.
NOTE: The relief valve feature is not intended for use in dynamic pressure limiting
applications. Consult factory.
FEATURES
• Hardened seats for long life and low leakage.
• Industry common cavity.
RATINGS
Formula for Thermal Expansion: ΔP = 57.7 x ΔT (where ΔP is in psi; ΔT is in °F)
Operating Pressure: 241 bar (3500 psi)
Proof Pressure: 390 bar (5700 psi)
Thermal Relief Settings:
05 34.5 – 48.3 bar (500 – 700 psi)
10 69.0 – 93.1 bar (1000 – 1350 psi)
20 137.9 – 172.4 bar (2000 – 2500 psi)
25 172.4 – 217.2 bar (2500 – 3150 psi)
30 206.9 – 262.1 bar (3000 – 3800 psi)
40 275.9 – 344.8 bar (4000 – 5000 psi)
45 310.3 – 386.2 bar (4500 – 5600 psi)
Flow: See Performance Chart
Internal Leakage: 0.25 cc/minute (5 drops/minute) max. at 240 bar (3500 psi)
Standard Check Bias Spring at Crack: 4.5 bar (65 psi)
Check
➀ to ➁ Crack Pressure Defi ned: Gauge bar (psi) evident at ➀ at
16.4 cc/minute (1 cu. in./minute) attained at
➁
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: VC10-2; See page 9.110.1
Cavity Tool: CT10-2XX; See page 8.600.1
Seal Kit: SK10-2X-T; See page 8.650.1
USASI: ISO:
SYMBOLS
PERFORMANCE
(Cartridge Only)
4.050.1
8.6/125
6.9/100
5.2/75
3.4/50
18.9
5
37.9
10
56.8
15
FLOW lpm/gpm
PRESSURE DROP bar/psi
Fully Open to
32 cSt/150 ssu oil at 40°C
➁➀
HYDRAFORCE
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Blue rectangles are links to other catalog pages.
Cartridge: Weight: 0.08 kg.
(0.18 lbs.) Steel with hardened
work surfaces. Zinc-plated
exposed surfaces. Buna N
O-rings and polyester
elastomer back-ups standard.
Standard Ported Body: Weight:
0.16 kg. (0.35 lbs.) Anodized
high-strength 6061 T6 alumi-
num alloy, rated to 207 bar
(3000 psi). Ductile iron bodies
available; dimensions may
differ. See page 8.010.1.
Porting
Cartridge Only 0
SAE 6 6T
SAE 8 8T
1/4 in. BSP* 2B
3/8 in. BSP* 3B
1/2 in. BSP* 4B
*BSP Body
U.K. Mfr. Only
Seals
Buna N (Std.) N
Fluorocarbon V
Check Bias Spring Setting
65 4.5 bar (65 psi) Std.**
Thermal Relief Setting
05 34.5 – 48.3 bar (500 – 700 psi)
10 69.0 – 93.1 bar (1000 – 1350 psi)
20 137.9 – 172.4 bar (2000 – 2500 psi)
25 172.4 – 217.2 bar (2500 – 3150 psi)
30 206.9 – 262.1 bar (3000 – 3800 psi)
40 275.9 – 344.8 bar (4000 – 5000 psi)
45 310.3 – 386.2 bar (4500 – 5600 psi)
CV10-28
DIMENSIONS
MATERIALS TO ORDER
CV10-28
- __ __ __ - __ - __ __ / __ __
4.050.2
®
HYDRAFORCE
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**Non-standard check bias spring settings and thermal relief
settings available for OEM applications. Consult factory.
Blue rectangles are links to other catalog pages.
