ПНД круглый клапан

HDPE (High Density Polyethylene) flap valve characteristics 1. Material density of HDPE products density is usually 0.94-1.17g/cm3 which is about steel 1 / 7. Therefore, it is very low head drainage. When the door is covered all immersed in water, drainage water level as low as 5 mm. 2. Impact resistance and good cold tolerance, resistance to environmental stress cracking resistance 3. Excellent chemical stability, good oil resistance 4. Water and the tiny <0.01%, permeability is low. 5. Insoluble in any organic solvent, acid, alkali and corrosive salts. The main performance parameters: 1.Temperature: -20°C—60°C (requirements under the maximum design temperature 120 °C flap valve) 2.Working pressure: 1—1.6MPa 3.Opening angle of the cover: >75° 4.Closed time: <2s 5.Open water level: (1). GRP cover shoot inside and outside the door open when the water level difference of ≥ 40mm (2). HDPE cover shoot inside and outside the door open when the water level difference of >5mm The open water level associated with the flap valve’s open angle weight, diameter size of the relevant. The open water level can be designed according to user needs. 6.Proportion: GRP flap valve 1.6­—1.9 g/cm3 HDPE flap valve 0.94-1.17g/cm3 7.Save energy: ≥10% 8.Design head: ≤15m( HDPE flap valve ≤5m)