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Ningbo Power Hydraulic Motor Co., Ltd.
Ningbo Power Hydraulic Motor Co., Ltd.  

Gold Index: 20032

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Pilot operated pressure reducing Valve controlled from the secondary circuit 

Price: 10.0~100.0 USD 
Place of Origin: Zhejiang, China (Mainland) 
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Product Detail

Model No.: DR...30B/
Packing: carton
Power: Solenoid
Pressure: High Pressure
Material: Casting
Media: Oil
Production Capacity: 20000pc/month
Delivery Date: 2 weeks
Standard or Nonstandard: Standard
Structure: Pressure Reducing
Temperature of Media: Others
Brand Name: Power

-optional check valve (only for valve for subplate mounting)
-4 pressure settings

-For subplate mounting
-For threaded connections
-For cartridge connection
-4 adjustment elements:
. Rotary knob.
. Sleeve with hexagon and protective cap,
. Lockable rotary knob with scale
. Rotary knob with scale
-4 pressure settings
-optional check valve (only for valve for subplate mounting)

Functional description, section
Pressure valves type DR are pilot operated pressure reducing valves, which are controlled from the secondary circuit. They basically consist of main valve (1) with main spool insert (3) and pilot valve (2) with pressure adjustment element(9).
At rest, the valves are open, fluid can freely pass from port B to port A via the main spoo1(3).
Pressure present in port A acts upon the bottom side of the main spool(3). At the same time there is pressure acting on the poppet (6)in the pilot valve (2) via the orifice (4) on the spring-loaded side of the main spool (3) and via the port (5). Same it is acting on the poppet (6) via the orifice (7), control line (8) and orifice (10). According to setting of spring (11), pressure builds up in front of the poppet (6), in port (5) and in spring chamber (12), holding the control spool (3) in the open position. Fluid can freely flow from port B to port A via main spool (3), until the pressure in port A exceeds the value set at spring (11) and opens the poppet (6). The control spool (3) moves to closing position.
The desired reduced pressure is achieved, when a balance between the pressure in port A and the pressure set at spring (11) is reached.
Pilot oil drain from spring chamber (12) to tank takes place externally via line (15).
Free return flow from port A to B can be achieved by installing an optional check valve (14).
A pressure gauge connection (17) allows the reduced pressure in port A to be monitored.



Ordering codes:

Technical data:
Flow (L/min)
Subplate mounting
Threaded connection
Max. operating pressure(inlet) Mpa
To 10 or to 31.5
Inter pressure  Mpa
To 31.5
outlet pressure  Mpa
Back pressure  Mpa
To 31.5
Pressure Fluid
Mineral oil or Phospate ester
Viscosity range       mm²/s
Temperature range      ℃

Unit dimensions (dmensions in mm)

Subplate mounting:

Port size

Threaded connnection
Pilot operated pressure reducing Valve

Cartridge connection
Pilot operated pressure reducing Valve

Mr. shawn
skype Mr. shawn

Tel: 86-574-87193975
Fax: 86-574-23671688
Mobile: 86- 181 5744 9077
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Company Info

Ningbo Power Hydraulic Motor Co., Ltd. [China (Mainland)]

Business Type:Manufacturer, Trading Company, Agent, Distributor/Wholesaler, Service
City: Ningbo
Province/State: Zhejiang
Country/Region: China (Mainland)

shawn:   skype

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