Gate Valve Manufacturer – Soft Seal (Brass) & Hard Seal (Cast Steel)

Coliter® offers a comprehensive range of gate valves engineered for reliable on/off control in water supply, heating, gas, and industrial pipelines. Our portfolio includes soft sealing gate valves (Z45X non-rising stem, Z41X rising stem) with EPDM/NBR seals for bubble-tight shut-off, hard seal gate valves (Z45T/Z41T) for high-temperature or abrasive media, and cast steel gate valves (Z40H, PZ73H knife gate) for high-pressure industrial use. We also provide lockable variants (DZ45X, CZ45X) with mechanical or magnetic security to prevent unauthorized operation—ensuring safety, durability, and compliance with GB/T 12234 standards.