The selection of ground spring mainly selects different types of ground spring according to the weight of glass door.

The ground spring is a hydraulic door closer, but the device that compresses the spring is a worm gear rather than a rack and pinion.

Before installation, the construction shall be carried out according to the plan, and the varieties, standards, opening direction and support pieces of doors and windows shall be checked.

The national standard of floor spring door is that the first-class product is opened ≥ 300000 times (actually the minimum standard of qualified products), the high-quality product is opened ≥ 500000 times, and the European standard is the minimum 500000 times.

This  window meet international standards.

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