Technical features:

1. Rectangular check valves are installed on ventilation pipes to prevent airflow from flowing backwards after the fan stops.

2. The opening pressure of the valve can be adjusted.

3. When the valve is closed, the air leakage meets the requirements of (JG/T436-2014 Building Ventilation air volume control valve) ordinary valves.

Product features:

1. The outer frame of the check valve is made of galvanized steel plate with a thickness of 1.5MM, and the blades are made of aluminum plate with a thickness of 1.5MM, which has the advantages of flexible switch and explosion protection.

2. The bearing of check valve is made of oil-containing copper powder, which can be lubricated permanently without oiling and can withstand high temperature of 200 C.

3. When the blade shaft is medium-12 galvanized round steel or stainless steel round steel valve with a width of more than 1200MM in the w direction, a middle partition plate is added to separate the blades, which plays a reinforcing role.