1. The main control parameters for the selection damper specifications. 2. damper suitable for ventilation and air conditioning systems, in addition to public buildings, kitchen hood system with dampers, operating temperature of 150 ℃, the general ventilation and air conditioning systems with fire dampers operating temperature of 70 ℃. 3. The damper is suitable for pipe ventilation, air conditioning or exhaust system, the basic functions and scope 4. Table 1 should pay attention to the choice of valve function damper valve 150, normally open or normally closed, shut down automatically turned on manually OFF ON, manual reset, signal output, remote control and other requirements. Our attention to reputation, to ensure product quality damper 280, focusing on small profits, rapid delivery dampers, and a service system Hengtong fire dampers, many new buildings in recent years to provide air-conditioning equipment, from product quality and after-sales service users have been satisfied if the valve and fan interaction should be used with double micro-switch device. Leaves should be steel body thickness of 2 ~ 6mm, the body of non-combustible material, rotating parts should be corrosion-resistant metallic materials, and flexible rotation. Shall not be less than the thickness of the valve housing 2mm. Yi Rong parts shall comply with recognized standards of 280 fire department fire dampers, fire dampers, rich ventilation equipment (View) provided by Dezhou Plumper ventilation plant. "Fans, dampers, pressure delivery outlet" preferred Dezhou Plumper ventilation plant (0), the company is located: Shandong Dezhou City, Shandong Wu Tun right, over the years, rich ventilation equipment to provide customers with the best quality service, contact People: Zhang. Welcome to the new and old customers call, letter, visit the guide, business negotiations. Rich ventilation equipment expect to be your long-term partner!