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

Gold Index: 20032

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hydraulic pilot operated pressure relief valves 

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

Model No.: DB20...30B/...
Packing: carton
Power: Solenoid
Pressure: High Pressure
Material: Stainless Steel
Media: Oil
Production Capacity: 20000pc/month
Delivery Date: 2 weeks
Standard or Nonstandard: Standard
Structure: Pilot
Temperature of Media: Others
Brand Name: Power

-Sandwich plate valve
- 4 pressure ranges
- 5 circuit options
-With one or two pressure relief cartridges
- 4 adjustment elements

Features of hydraulic pilot operated pressure relief valves:
-Subplate mounting
-Pipe connection
-Insert connection
-Three adjustment elements:
. Rotary knob
. Hex. head screw with protective cap
. Lockable rotary knob with scale
-Solenoid operated unloading via a built-in directional spool valve


Functional description of hydraulic pilot operated pressure relief valves:
General
         Types DB and DBW pressure valves are pilot operated pressure relief valves.
         They are used for the limitation (DB) or limitation and solenoid actuated unloading (DBW) of the control pressure.
         The pressure relief valves (DB) consist mainly of the main valve (1) with main spool assembly (3) and pilot operated valve (2) with pressure adjustment element.
Pressure relief valve type DB:
          The pressure presents in port A acts on the main spool (3) At the same time pressure is applied via the control lines (6) and (7), which are fitted with orifices (4) and (5), on the spring loaded side of the main spool (3) and at the poppet(8) in the pilot control valve (2). If the pressure in port A exceeds the value set at the spring (9), the poppet (8) opens against the spring (9).
          The signal for this comes internally via the control lines (10) and (6) from port A. The pressure fluid on the spring loaded side of the main spool (3) now flows via the control line (7), orifice bore (11) and poppet (8) into the spring chamber (12). In type DB...30/... it flows internally via the control line (13) to tank, or in type DB..30/..Y.. externally via the port Y. Due to the orifices (4) and (5) a pressure drop occurs at the main spool (3), the connection from port A to port B is open. Now the pressure fluid flows from port A to port B while maintaining the value set operating pressure.
         The pressure relief valve may be unloaded or switched over to a different pressure (second pressure stage) via port "X" (15).


Section of type DB...30B/
Pressure relief valve with solenoid operated



Section of type DBW...30B/
Pressure relief valve with solenoid operated



Oil control forms of graphlic symbols
Pressure relief valve with solenoid operated


Ordering datails of Pressure relief valve with solenoid operated
Pressure relief valve with solenoid operated



Technical data of Pressure relief valve with solenoid operated:
Size
8
10
15
20
25
30
Max. flow            L/min
Threaded connections
100
200
200
400
400
600
subplate mounting
-
200
-
400
-
600
Operating pressure port A B X (Mpa)
To 31.5
Back pressure          (Mpa)
DB
To 31.5
DBW
To 6
Min. setting pressure   (Mpa)
Flow dependent
Max. setting pressure   (Mpa)
To 10 or 31.5
Pressure Fluid
Mineral oil or Phospate ester
Viscosity range    mm²/s
10~800
Temperature range   ℃
-30~+80
Characteristic of solenoid valve
See type WE5



Unit dimensions (dimensions in mm)

Subplate mounting:
Pressure relief valve with solenoid operated


Port Size 1
Pressure relief valve with solenoid operated


Threaded connection
Pressure relief valve with solenoid operated


Port Size 2
Pressure relief valve with solenoid operated


Cartridge connection:
Pressure relief valve with solenoid operated



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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