QRS type electronic dry-valve fast opening external device reset QRS Electronic Accelerator is dry valve dry valve quick opening device that can reduce when one or more action dry sprinkler valve opening time. Tyco Fire Suppression and Building Products TFS & amp; BP provide fire solutions and ancillary buildings to build solutions for commercial, industrial, institutional, government agencies and homes. RV-1 straight type and angle type fire with pressure relief valve holding pressure RV-1 type holding pressure relief valve is specially designed for the fire system. Pressure relief valve on the pilot valve through automatic control valve wet rain, wet flow changes in the system and rain Valves, fire protection system can maintain the pressure at the set value. When the system pressure exceeds a set value, pressure relief valves automatically open to the excess flow back to the fire water tank, to keep the system pressure constant. Fire protection system stops working when wet rain specialty valves, pressure relief valves fully open valve wholesale wet rain, the water pump all traffic back to the tank, then the system check valve is closed, isolating fire pumps and systems, the system against pressure Shock. When the pump is closed, the pressure relief valve automatically shut down slowly. RV-1 type valve is a hydraulic valve controlled by the pilot valve, providing maximum control accuracy. Pressure relief valve is normally 'T' connected to the pipeline fire, the fire pump is installed between the valve and the system where wet rain _ Chong Anyuan electromechanical valves (certified) _ wet rain Castle valve by the Hubei Chong Anyuan Electrical Equipment Co., Ltd. to provide. Hubei Chong Anyuan Electrical Equipment Co., Ltd. (www.hbcay119.com) (www.hbcay119.com) is a leader in Wuhan, fire protection equipment, over the years, the company implement the scientific management, innovation and development, the principle of honesty and trustworthiness, the maximum Limits to meet customer needs. Anyuan electromechanical leadership in creating the staff warmly welcome all inquiries negotiations to create create a better future for electromechanical Anyuan.