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

Gold Index: 20032

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4 adjustment elements Pilot operated pressure reducing 

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

Model No.: DR...50B/
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

Features:
- Subplate mounting
- For threaded connections
- For manifold mounting
- 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..
At rest, the valves are open, fluid can freely pass from port B to port A via the main spool insert (3).
Pressure present in port A acts upon the bottom side of the main spool. At the same time there is pressure acting on the ball (6) in the pilot valve (2) via the orifice (4) on the spring-loaded side of the main piston (3) and via the port (5). Same it is acting on the ball (6) via the orifice (7), control line (8), check valve (9) and orifice (10). According to setting of spring (11), pressure builds up in front of the ball (6), in port (5) and in spring chamber (12), holding the control piston (13) in the open position. Fluid can freely flow from port B to port A via main spoof insert (3), until the pressure in port A exceeds the value set at spring ('11) and opens the ball (6). The control piston (13) 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 (14) to tank takes place externally via control line (15).
Free return flow from port A to B can be achieved by installing an optional check valve (16).
A pressure gauge connection (17) allows the reduced pressure in port A to be monitored.


Section:
Pilot operated pressure reducingmanifold mounting


Ordering codes:
Pilot operated pressure reducingmanifold mounting


Symbol
Pilot operated pressure reducingmanifold mounting


Technical data:
Inter pressure   Mpa
to 31.5
outlet pressure   Mpa
To 5.0,to 10.0, to 20.0, to 31.5
Back pressure   Mpa
to 31.5
Max. flow/subplate mounting         L/min
DR10
DR30
150
300
Max. flow/threaded connection         L/min
DR10
DR15
DR20
DR20
150
300
300
400
Pressure Fluid
Mineral oil or Phospate ester
Temperature range    ℃
-30~+80
Viscosity range    mm²/s
10~800
Filtration
Max. permissible Degree of fluid contamination is to NAS 1638, class 9β10≥75



Unit dimensions (dimensions in mm)

Subplate mounting:
Pilot operated pressure reducingmanifold mounting


Port size:
Pilot operated pressure reducingmanifold mounting


Threaded connection:
Pilot operated pressure reducingmanifold mounting
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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