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

Gold Index: 20032

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solenoid actuated pressure relief valves 

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

Model No.: DB/DBW...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: 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 Pressure relief valve casting:
-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 built-in directional spool valve

functional description of Pressure relief valve casting:
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 spoof assembly (3) and pilot operated valve (2) with pressure adjustment element.
Pressure relief valve type DB:
The pressure present 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 ball
(8) in the pilot control valve (2). If the pressure in port A exceeds the value set at the spring (9), the ball (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 ball (8) into the spring
chamber (1 2). In type DB...50B/... it flows internally via the control line (13) to tank, or in type DB..50/..Y. externally
via the control line (14). 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 whilst maintaining the set operating pressure.
The pressure relief valve may be unloaded or switch over to a different pressure (second pressure stage) via port
 "X" (15).
Pressure relief valve type DBW:
The function of this valve is basically same as the valve type DB.
The unloading at the main spool(3), however, is achieved by actuating the built-in directional valve(16).

Section of solenoid actuated pressure relief valves:Pressure relief valve casting

Symbol of solenoid actuated pressure relief valves
Pressure relief valve casting

Ordering codes:
Pressure relief valve casting

Technical data

Installation position
Weight               (kg)
DB 10
DB 15
DB 20
DB 25
DB 30
Subplate mounting DB    (kg)
DBW                  (kg)
DBC                   (kg)
1.2 (DBWC add 1.2kg)
DBC 10 or 30            (kg)
1.5 (DBWC 10 or 30 add 1.2kg)
Cartridge connection DB…G…(kg)
DBW…G…                (kg)
Technical data for the directional valves
See WE6

Hydraulic data:
Operating pressure port A B X (Mpa)
To 35.0
Back pressure
Port Y
DB (Mpa)
To 31.5
DBW.6A.(standard solenoids ) (Mpa)
DC: 10.0      AC: 16.0
DBW.6B.(Min.setting pressure) (Mpa)
Indicator light       (Mpa)
Flow dependent
Maximum           (Mpa)
To 5.0, 10.0, 20.0, 31.5, 35.0
Max. flow
-Subplate mounting  L/min
-Threaded connection L/min
DB 10
DB 15
DB 20
DB 25
DB 30
Pressure Fluid
Mineral oil or Phospate ester
Temperature range      ℃
Viscosity range       mm²/s
NAS1638 9 class

Unit dimensions (dimensions in mm)

Subplate mounting:
Pressure relief valve casting

Threaded connection
Pressure relief valve casting

Cartridge connection
Pressure relief valve casting
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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