Coliter®’s hard sealing gate valves are engineered for demanding applications in steam, oil, gas, and high-temperature water systems where metal-to-metal sealing ensures long-term reliability. The series includes the Z41T rising stem gate valve and Z45T non-rising (dark rod) gate valve, featuring a precision-machined bronze or stainless steel wedge that seals directly against a hardened seat—eliminating elastomer degradation risks. Rated at PN16 (1.6 MPa) and suitable for temperatures up to 200°C (depending on material), these valves comply with GB/T 12234 and offer full-port flow with robust cast iron or ductile iron bodies. Ideal for power plants, district heating, industrial pipelines, and fire protection systems requiring maintenance-free, fire-safe shut-off performance.
