Applicable: plate exhaust port installed in the aisle ceiling or wall board, it can be installed directly in the exhaust air terminal, smoke detector alarm signals emitted when the fire broke out, the control center via DC24V electricity to a remote control device, a remote control device movement within the solenoid, releasing the rope, in the valve body of the torsion spring force to open the valve manually open the valve or exhaust. Performance: 1, the electrical signal DC24V open the valve; 2, remote manually open the valve; 3, remote manual reset; 4, when the valve is open the output signals, and can chain and other equipment. Our company specializes in the production of central air conditioning and ventilation, smoke ventilation various damper: dampers, fire control valve, exhaust valves, smoke damper, manual control valve, check valve, residual pressure valves, pressure delivery outlet, leafy exhaust port, exhaust port plate, a variety of remote control valve. The company is strong in technology, superior product quality, credit protection, low prices. Our call to discuss!