Coliter ® Water Heating Gate Valve – PN16, -20~180°C, Threaded End for Hot Water & Steam Systems

Z15W Water Heating Gate Valve – Compact Brass or Stainless Steel Gate Valve with Metal-to-Metal Sealing for High-Temperature Service

The Coliter® Z15W Water Heating Gate Valve is a specialized threaded gate valve engineered for reliable shut-off in hot water, steam, and heating systems. Designed for elevated temperatures up to 180°C, it features a robust metal-to-metal hard sealing structure—eliminating elastomer degradation common in soft-seal valves at high heat. The valve is available in multiple material configurations: WCB carbon steel (Z15W-16C), CF8 (304 stainless steel, Z15W-16P), or CF8M (316 stainless steel, Z15W-16R) for the body, bonnet, and flashboard, with matching stainless steel stems (2Cr13, 304, or 316) for corrosion resistance. Rated at PN16 (1.6 MPa), it undergoes rigorous testing: shell test at 2.4 MPa, seal test at 1.76 MPa (water), and hermeticity test at 0.6 MPa (air). Suitable for media including water, gas, oil, nitric acid, and acetic acid, it operates reliably from -20℃ to 180℃. The valve uses ISO 228 cylindrical pipe threads (G1/2" to G4") per GB/T standards and complies with GB/T 12224 (design), GB/T 12221 (structure length), and GB/T 13927 (testing). With a compact non-rising stem design and PTFE/flexible graphite packing, the Z15W delivers durable, leak-resistant performance in residential heating, district energy networks, and light industrial thermal systems.