Beijing Huade Hydraulic Industrial Group is a renowned state-owned company specializing in the the design, manufacturing, and service of hydraulic products and equipment. DBWT relief valve can replace the products offered by Rexroth®. The factory has passed ISO9001, ISO14001 and OH SAS18001. Huade Hydraulic has a good inspection system to ensure the high quality of hydraulic valves. The factory operates more than 750 pieces advanced production equipment imported from all over the world. Each pressure valve will be packed in waterproof plastic bags and standard cartons, with anti-counterfeiting marks attached. Huade® hydraulic products are widely used in the military industry to promote the modernization of defense equipment.
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Size |
6 |
8、10 |
15、20 |
25、30 |
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Operating |
Port P |
40 |
63 |
40 |
31.5 |
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Port T |
31.5 |
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flow (L/min) |
50 |
120 |
250 |
350 |
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Pressure fluid |
Mineral oil (for NBR seal),or |
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Pressure fluid |
-30～+80 |
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Viscosity range (mm ²/s) |
10～800 |
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Features:
▶ As cartridge valve
▶ For threaded connections
▶ for subplate mounting
▶ 3 pressure adjustment elements, optional:
·Rotary knob
·.Hex. head screw with protective cap
·Lockable rotary knob with scale
Application:
The DBD pressure relief valves are direct operated poppet valves.
They are used to limit the pressure in a hydraulic system.
The valves mainly consist of sleeve (1), spring (2),poppet with damping spool (4) (pressure stages 2.5 to40 MPa) or ball(4) (pressure stage 63 MPa) and adjustment element (3). The setting of the system pressure is infinitely variable via the adjustment element (3). The spring (2) pushes the poppet (4) onto the seat. The P channel is connected to the system. The pressure present in the system is applied to the poppet area (or ball).
If the pressure in channel P rises above the valve set at the spring (2), the poppet (4) opens against the spring(2). Now pressure fluid flows form channel P into channel T. The stroke of the poppet (4) is limited by a pin.In order to maintain a good pressure settings over the entire pressure range the pressure range is split into 7 pressure stages.One pressure stage corresponds to a certain spring for a maximum operating pressure which may be set with it.
Structure and symbols of Pressure Relief Valve DBD
Symbols of DBD
1.The fluid must be filtered. Minimum filter fineness is 20 ㎛.
2.The tank must be sealing up and an air filter must be installed on air entrance.
3.Products without subplate when leaving factory, if need them, please ordering specially.
4.Valve fixing screws must be high intensity level (class 10.9). Please select and use,them according to the parameter listed in the sample book.
5. Roughness of surface linked with the valve is required surface roughness is 0.8.
6. Surface finish of mating piece is required to 0.01/100mm.
Address
No. 27, Yangsha Road, Huilong Town, Nantong City, Jiangsu Province, China
Tel
