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Structure and working principle
Thie relevant information of DB10-1-50/31.5 pilot relief valve:
Basic structure:
It is consists of main valve and pilot valve, the upper and lower ends of the main valve core are both affected by oil pressure.The pilot valve part is mostly a cone valve structure with small structural dimesions and small pressure regulating spring stiffness.
Working principle:
While working，hydraulic force make on the main spool and pressure testing face at the same time.While the oil inlet pressure is lower than the set pressure of the relief valve, the spool is closed,When the oil force is greater than the spring force, the pilot valve opens first, and the liquid flows back to the oil tank through the damping hole on the main valve core and the pilot valve.The main valve core moves up under the pressure diiference,opens the valve port, relizes overflow, and maintains the pressure basically stable.
Jinhai is professional manufacturer of Various types of Directional Control Valves, Flow Control Valves, Pressure Control Valves and Accessories, Should you have any questions please feel free to come back to us.
DB/DBW pressure control valve is a pilot relief valve.
They are used to limit (DB) or limit and system pressure with solenoid (DBW). The relief valve (DB) mainly consists of main valve (1) with main spool insert (3) and pilot with pressure regulating element valve (2).
DB type relief valve
The pressure in circuit A acts on the main spool (3). At the same time, the pressure acts on the ball (8) of the main (3) and the first (2) through the belt joint (4) (5 system passage (6) (7). If the pressure in the passage A exceeds the spring (9) The setting value, ball (8) overcomes bullet (9) and opens.
The signal for this is supplied internally from the A channel by the control oil (10) and (6). The oil on the loading side of the main spool (3) passes through the control port (7), throttling (11) and ball (8) into (12). From here internal supply - DB-5X-type via control channel (13), or external supply - DB..-5X..Y-type, via control channel (14) into tank. Orifices (4) and (5) create a pressure drop across the spool (3), opening from the A-pipe to B-pipe connection. Oil flows from pipe A to pipe B, while the set working pressure remains unchanged. The relief valve can be unloaded or switched over to a different pressure (second pressure rating) via port X (15).
Pressure relief valve (superimposed) with switching time delay type DBW../.S..R12
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Main Product:
Hydraulic Valves,
Solenoid Valve,
Solenoid Control,
Direction Control Valve,
Pressure Control Valve ,
Flow Control Valve
