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Weihai Zhonghao Pneumatic Hydraulic Co., Ltd.

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Pneumatic and hydraulic component manufacturer and supplier

We specialize in seven major product lines, including pneumatic valves for petroleum machinery, air-source treatment components, control components, actuating components, auxiliary components, pneumatic tools, and hydraulic components—totaling over 1,000 varieties.

Pneumatic hydraulic components

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Product News

Two-position three-way directional control valve

2-BA-1 button-type two-position three-way directional control valve: P is the inlet port, A is the working port, and the exhaust port can be installed internally or on the panel. It can be controlled either manually or via foot pedal.

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Pneumatic hydraulic components

Two-position three-way normally closed pneumatic valve

The 23QB-L8 two-position three-way normally closed pneumatic valve is a new type of pneumatic valve, serving as a redesigned and upgraded replacement for the original QF506 dual-purpose relay.

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Pneumatic hydraulic components

Two-position three-way normally closed air control valve

The 23QB-L15 two-position three-way normally closed pneumatic directional control valve is a new, advanced pneumatic valve that serves as a pneumatic replacement for the original QF506 dual-purpose relay.

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Pneumatic hydraulic components

Internal pilot-operated pressure reducing valve

The PJXN pressure reducing valve primarily controls the main valve pressure by adjusting the gas pressure of the pilot valve. It is an internally-piloted pressure reducing valve, where a small pressure reducing valve controls a larger one. Compared to direct-acting pressure reducing valves, it requires less effort to adjust and exhibits smaller fluctuations in output pressure. Consequently, it is widely used in control systems that handle large flow rates and high pressures.

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Pneumatic hydraulic components