Jiangsu Huafilter Hydraulic Industry Co., Ltd.
Jiangsu Huafilter Hydraulic Industry Co., Ltd.
Products
Pilot Operated Check Valve SV
  • Pilot Operated Check Valve SVPilot Operated Check Valve SV
  • Pilot Operated Check Valve SVPilot Operated Check Valve SV
  • Pilot Operated Check Valve SVPilot Operated Check Valve SV
  • Pilot Operated Check Valve SVPilot Operated Check Valve SV

Pilot Operated Check Valve SV

Huafilter’s main business is the supply of Huade® hydraulic directional valves and repairs of hydraulic systems for many years in China. We became the only one authorized overseas distribution company of Beijing Huade Hydraulic Industrial Group in 2023. Our check valves have always come up to the international standards. We’re sure that the quality of Pilot Operated Check Valve SV conforms to customer needs. We provide a good after-sales service with experienced engineers providing timely technical support. Contact us for cost-effective, reliable hydraulic products and top-notch services.

After Huade was established, it cooperated with Rexroth twice. Huade® check valve SV are affordable substitutes for Rexroth's same series of products. It is competitive with well-know products with good quality and lower price. The factory has passed ISO9001, ISO14001, and OH SAS18001. It is a well-know national brand in China. Within the guarantee period, it is free to repair. All check valves undergo rigorous testing before leaving the factory to ensure superior and stable performance. Huade® hydraulic valves are widely used in the military industry and other fields due to the superior performance.  

Product parameter of the Pilot Operated Check Valve SV

Technical data

Style

10

16

20

25

30

Weight

subplate mounting (kg)

1.8

-

4.7

-

7.8

threaded connection (kg)

2.1

5.4

5.4

10

10

Installation position (MPa)

Optional

Direction of flow (MPa)

From A to B free, from B to A through opening

Operating pressure, max.(MPa)

0.5~315

Control pressure, max (MPa)

0.5~315

Control volume -port X (cm3)

2.5

10.8

10.8

19.27

19.27

Control areas -area A1 (cm3)

1.3

3.46

3.46

5.72

5.72

-area A2 (cm3)

0.33

0.7

0.7

1.33

1.33

-area A3 (cm3)

3.8

10.17

10.17

16.61

16.61

-area A4 (cm3)

0.79

1.13

1.54

1.54

Pressure fluid

Mineral oils(for NBR seal) or phosphate ester(for FPM seal)

Pressure fluid temperature range(℃)

-30~+80

Viscosity range    (mm2/s)

2.8 to 500


Product Feature And Application of the Pilot Operated Check Valve SV

Features:

▶ check valve controlled by fluid

▶ For subplate mounting,Mounting pattern to DIN 24 340

▶ Subplate or screw threaded connection

▶ With or without leakage port

▶ With or without pre-opening

▶ Type with pre-opening,dampened decompression

▶ 4 opening pressures

▶ Porting pattem to Din 24 340 fom A, 1SO 4401 and CETOP- RP 121H


Application:

Pilot operated check valves SV are used for the isolation of operating circuits under pressure, as safeguard against the lowering of a load when a line break occurs or against creeping movements of hydraulically locked-in actuators.

Functions,section,symbols of the Pilot Operated Check Valve SV

Check valves SV are hydraulic pilot operated check valves in poppet type design which may be opened to allow low in either direction.

Basically these valves consist of housing (1), poppet (2),compression spring (3), control spool (4) as well as a pre-opening,as ball poppet valve(5), optionally.

The valve enables free flow from A to B, in the counter direction the poppet (2) is held on its seat by the system pressure, additionally to the spring force.  

Through the pressure connection at control port X the control piston (4) is moved to the right. This pushes the poppet(2) from the seat. Now the valve may also have a flow from B to A.

In order to ensure the proper opening of the valve via the control piston (4) a certain minimum control pressure is necessary.

Type SV..A..(with pre-opening,section 1)

This valve has a additional pre-opening. Through pressure connection at control port X the control piston (4) is pushed to the right.

This first pushes the ball (5) and then the poppet (2) from the seat. Now the valve may also have a flow from B to A. Because of the pre-opening there is a dampened decompression of the fluid under pressure. Through this possible pressure shocks are avoided


Symbol of SV


Cutaway view of check valve type SV. .PA

(without leakage port, with pre-opening)

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