Garage Door Torsion Springs Alloy Steel

We specialize in the design and manufacture of torsion springs.

We can provide our clients with well-known expertise, a good reputation in China, and the future direction is global.

A check valve comprises a housing having a ball normally disposed on a seat defined therein to prevent communication of fluid from an inlet to an outlet thereof. A torsion spring is mounted on the housing to have an end thereof engage the ball to hold it in its normally closed position and to permit opening thereof to communicate the inlet with the outlet when the level of fluid pressure in the inlet exceeds a predetermined level. During assembly of the valve, a pin is secured to the housing in blocking relationship across an outlet passage to limit pivotal movement of the end of the spring and to prevent the ball from rolling there past.

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Place of Origin: China
Certification: ISO9001-CE
Material: 304、316、X-750、718、625、7090
Precise adherence to force and dimension requirements.