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Source Factory Offers Wholesale of High-Quality Sealing DIN Standard Gate Valves. Ductile iron body with epoxy coating, anti-corrosion, long service life for underground pipe networks. Resilient rubber seat, zero leakage, reliable sealing for water & sewage medium. Non-rising stem design, saves installation space, suitable for buried pipeline projects. Complies with GB/T13927 & DIN3352 F4 standards, available for global engineering procurement. Easy operation, low maintenance, ideal for urban drainage, water supply and sewage treatment.