slide valve

poppet valve

ball valve

Directional control valve, check valve, reversing valve, etc.

Pressure control valves, relief valves, pressure reducing valves, sequence valves, pressure relays, etc.

Flow control valve, throttle valve, speed regulating valve, diverter valve, etc.

Manual control valve, handle control valve, hand wheel control valve, pedal (or lever) control valve

Mechanical control valve, stop control valve, spring control valve

Electric control valve, electromagnetic control valve, electro-hydraulic combined control valve

Pipe connection valve, threaded connection valve, flange connection valve

Plate and stacked connection valves, single-layer connection plate valves, double-layer connection plate valves, manifold connection valves, Denga valves

Cartridge connection valve Threaded cartridge valve, flange cartridge valve

An ordinary one-way valve is generally referred to as a one-way valve. Its function is to only allow hydraulic oil to flow in one direction in the oil circuit and does not allow reverse flow. Therefore, it is also called a check valve or a check valve. There are two types: straight-through type and right-angle type. type.

The hydraulic control check valve is a one-way valve that can realize reverse flow. Compared with the ordinary one-way valve, the hydraulic control check valve has a control oil chamber a, a control piston 1 and a remote control port K added to the structure.

1. Bits - represented by squares, the number of bits is how many squares 2. Passed—↑ Barred—┴, ┬ The number of intersections between the beginning and end of the arrow and the interception symbol and a square is the number of passes. 3. P, A, B, and T have fixed orientations P—oil inlet, T(O)—oil return port A, B—working oil ports connected to the actuator 4. Control mode and return spring - W, drawn on both sides of the square. Two-position valve, one position depends on the spring. 5. Normal position (in the schematic diagram, the oil line should be connected at the normal position) Three-position valve, one in the middle.

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Manual reversing valve The manual reversing valve uses a control handle to change the position of the valve core to achieve reversing.

Motorized reversing valve Motorized reversing valve is also called stroke valve. It uses a stopper or cam installed on the moving parts to push the roller at the end of the valve core to move the valve core, thereby reversing the direction of the oil circuit. This kind of valve is usually a two-position valve, which is divided into two types: normally closed and normally open, and is returned by a spring.

Electromagnetic reversing valve The electromagnetic reversing valve uses the thrust of the electromagnet to change the working position of the valve core to achieve reversal. Solenoid directional valves can be divided into AC solenoid directional valves and DC solenoid directional valves according to the power source used.

Hydraulic reversing valve Hydraulic reversing valve uses the force of the hydraulic oil to control the valve core to change the working position to achieve reversing. It is suitable for large flow circuits.

Electro-hydraulic directional valve The electro-hydraulic directional valve is composed of an electromagnetic directional valve and a hydraulic directional valve. Among them, the electromagnetic reversing valve is the pilot valve, used to change the direction of the control oil circuit; the hydraulic reversing valve is the main valve, used to change the direction of the main oil circuit. The electro-hydraulic reversing valve can be used to control the reversing direction of a large-flow hydraulic valve with a sensitive small-sized electromagnetic reversing valve, so it is easy to control and has a large flow rate.