The product meets the requirements of domestic and international quality standards.
DBT/DBWT remote control overflow is a direct acting overflow valve used for remote control system pressure
The DBWT type is used to remotely control system pressure and unload it with the help of solenoid valves
DBT type remote control overflow valve is mainly composed of valve body, valve core, valve seat, spring and regulating device
The system pressure acts on the valve core through the throttle hole. When the system pressure exceeds the set pressure of the spring, the pressure oil is discharged back to the oil tank from the T port (or discharged back to the oil tank from the outside)
Product Description
| Pressure remote relief valve types DBT/DBWT | |
| up to 31.5 MPa | up to 3L/min |
Types DBT and DBWT remote control pressure valves are pilot operated pressure relief valves.
Type DBT is apply to remote control the pressure of system.
Type DBT:
Type DBT consist mainly of the main valve (1), main spool (2), valve seat (3), and adjustment (6).
The pressure of system acts on the spool(2) via orifice. If the pressure exceeds the valve set at the spring, the pressure fluid drain to tank from port T(or drain external).
Type DBWT:
Type DBWT consist mainly of the main valve (1), main spool (2), valve seat (3), electrically operated valve (5), and adjustment (6).
Type DBWT is apply to remote control the pressure of system and drain by actuating the electrically operated valve.
Remote control function (when using the remote control port):
This is the key function of DBT/DBWT valve. Connect remote control port Y to a remote pressure regulating valve.
At this point, the pressure in the upper chamber of the main valve core is no longer controlled by its own pilot valve, but by the set pressure of the remote pressure regulating valve.
The remote pressure regulating valve is actually a direct acting relief valve that sets a lower control pressure than the main valve pilot valve.
When the system pressure P reaches the set pressure of the remote pressure regulating valve, the remote pressure regulating valve opens first and the oil flows out from port Y. Similarly, this will create a pressure drop on the damping hole, causing the main valve core to open.
Final result: The overflow pressure of the main valve is determined by the set pressure of the remote pressure regulating valve, rather than the set pressure of its own handwheel.
Important features:
The set pressure of the remote pressure regulating valve must be lower than the set pressure of the pilot valve of the main valve itself. Otherwise, the remote control function will fail and the system pressure will be limited by the higher set pressure of the main valve itself.
Through the remote control port, advanced functions such as remote adjustment (installing the pressure regulating valve in a convenient location for operation) and multi-stage pressure control (switching different remote pressure regulating valves through an electromagnetic directional valve) can be achieved.
ordering details:
Unit dimensions(dimensions in mm)
Notice
1.The fluid must be filtered. Minimum filter fineness is 20 gm.
2.The tank must be sealing up and an air filter must be installed on air entrance.
3.Products without subplate when leaving factory, rf 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.
Main features
Flexible pressure control: Remote and multi-level pressure control can be achieved through a remote control port.
Large flow capacity: The pilot structure is suitable for high-pressure and high flow hydraulic systems.
Stable pressure regulation: Pilot control ensures that the regulation under high pressure is still light and smooth.
Stable pressure: Good opening and closing characteristics, with minimal pressure overshoot.
Multiple options: There are usually multiple diameters, pressure levels, types of pressure regulating handles, and types of oil port connections to choose from.
Typical applications
DBT/DBWT valves are widely used in various industrial hydraulic equipment, especially in situations that require complex pressure control:
Injection molding machine: used to control different pressures at different stages such as injection, holding pressure, and mold opening and closing.
Hydraulic press/hydraulic press: realizes multi-stage pressure control such as pressurization and unloading.
Construction machinery: such as excavators and cranes, used to achieve pressure limitation in different working modes.
Machine tool: used for different pressure requirements of clamping, feeding and other circuits.
Any system that requires remote or programmatic changes to the maximum pressure of the system.
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