gate valve Class900 (approx. 15.4 MPa) is a high‑pressure rating per API 6D, widely used in long‑distance natural gas pipelines, compressor stations, and urban high‑pressure ring mains. Such valves must comply with API 6D design, ASME B16.10 face‑to‑face dimensions, and B16.5 flange standards, with fire‑safe, anti‑static, and emergency sealant injection features. Below are leading domestic manufacturers with Class900 gate valve production capability.The main gate valves product names of China gate Valve Network include:,Electric Rising Stem Single Disc Wedge Gate Valve,Electric Wafer Knife-shaped Gate Valve,Electro-hydraulic Wafer Knife-shaped Gate Valve,Electric Slurry ValveElectric Flange Gate Valve,Fire Special Signal Relisient Seat Seal Gate Valve,Fire Special Rising Stem Resilient Seat Seal Gate Valve,Forged Steel Socket Welding Valve,Forged Steel Flange Gate Valve,

GB Bellows Wedge Gate Valve,High Temperature & pressure Power Station Gate Valve

1. Kaixinwei Valve Group Co., Ltd.

Located in Sanqiao Industrial Zone, Oubei Street, Yongjia County, Wenzhou, Zhejiang – the “Hometown of Pumps and Valves” in China. Founded in 1990, Kaixinwei is a large enterprise integrating R&D, casting, manufacturing, and sales. It holds ISO9001, TS, CE‑PED, and API 6D certifications. Pressure ratings cover Class900 to Class2500, sizes NPS 1/2″ to NPS 24″, with materials including WCB, WC6, WC9, C12A, F11, F22, F91, F92, etc. Products include slab gate valves and high‑pressure hydrogen‑service valves, with proven references in Sinopec Zhenhai Refining & Chemical hydrocracking units. Kaixinwei is a key supplier for long‑distance pipelines and petrochemical projects.

2. Valveway Valves Co., Ltd.

Based in Lishui, Zhejiang, jointly developed a 48″‑Class900 ultra‑large‑bore wedge gate valve with Tsinghua University in 2024, designed to API 600. The body is epoxy‑coated, with hardened guide ribs for superior erosion resistance.

3. Zhejiang Zhongxin Valve Co., Ltd.

Pressure ratings from Class150 to Class900; materials include stainless, alloy, carbon, and duplex steels.

4. Chaoda Valve Group Co., Ltd.

Covers Class150–Class900 and PN16–PN160. The first Chinese company to hold both API 6D and API 600 gate valve certifications.

5. Zhejiang Tingyu Fluid Equipment Co., Ltd.

Offers pneumatic parallel double‑disc gate valves for Class900–Class2500, temperature range -46°C to 600°C.

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