Pneumatic flapper valve movement. Model specifications DN400 form 100 according to shape into flapper valve port side, round mouth flapper valve, side port side and one side round mouth flapper valve flapper valve by type into manual, electric and pneumatic flapper valve flapper valve . flapper valve common parameters can be divided into several inner diameter of 200, 300 and so on. For more information call us Su Jing, Price 15128740750. cast stainless other materials can be customized. Other Valves Product Name: three-way dosing valve, positive links dosing, pneumatic three dosing valves, electrical, pneumatic, hydraulic power, the three-way valve Model: Dy / D / Q / S / FC-I , FC-II Product Specifications: 200 * 200-900 * 900 Media: powder, dust solids Temperature: ≤350 ℃