Product Description ... F5 German standard resilient seated gate valve F4 / F5 German standard resilient seated gate valve of the soft sealing valve cavity-free structure, the valve bonnet and external surface coating of epoxy resin, rubber coated shutter, so eliminate the possibility of corrosion fundamentally. Discard the stem seal packing and the use of "O" ring seal, the seal more reliable. Unique design: the whole bonnet, dark bar design, compact; both stem nut and gate structure, without jamming phenomenon; a straight path, no retention cavity; stem seal with "O" ring. Excellent corrosion resistance: the shell, the outer surface coating of epoxy resin; connecting bolts using hex bolts, top wax seal. Reliable hygiene: Epoxy meet the health standards GB / T17219-1998; shutters covering the whole meet the health inspection of rubber; valve stem nuts and other parts made from water corrosion of stainless steel or bronze and other materials. Scope: drinking water, drainage, sewage treatment. F4 / F5 German standard resilient seated gate valve technical parameters: Size: DN 40-300mm Working Pressure: 1.0-1.6Mpa (10-25bar) 1.0MPa 1.6MPa seal test: 1.1MPa 1.76MPa shell test: 1.5MPa 2.4MPa Design Standard: DIN3352 connection flange: DIN2501 (equivalent to GB / T17241) ISO2531 / EN545 / BS4504 Structure length: DIN3202 (equivalent to ISO5752) DIN3202 (equal to ISO5752) Operating temperature: NBR ≤80 ℃ (NBR≤80 ℃) EPDM ≤120 ℃ (EPDM≤120 ℃)