Industrial Extended Bonnet Gate Valve, 304/316 Stainless Steel, Class150/300, for LNG & Petrochemical Plant Cryogenic -196℃
Superior Low Temperature Resistance Made of CF8 (304SS) or CF8M (316SS) stainless steel, suitable for cryogenic service down to -196℃, ideal for LNG, liquid nitrogen, and low-temperature gas pipelines.
Extended Bonnet Design for Cryogenic Service Long stem and extended bonnet protect packing gland from freezing, ensuring smooth operation and preventing leakage under extreme low temperature conditions.
Bi-directional Tight Shut-off Performance Precision-machined wedge gate with hard-faced seats provides zero-leakage sealing in both directions, meeting API 6D/API 607 fire-safe standards.
Manual Operation with Clear Position Indication Rising stem design allows direct visual check of open/closed status, and the heavy-duty handwheel ensures easy and reliable manual operation.
Standard Flange Connection Flanged end compliant with ASME B16.5 Class 150/300, compatible with most industrial piping systems for easy installation and replacement.
Strictly Tested & Certified Quality Each valve undergoes 100% shell test and seat test at cryogenic conditions, ensuring stable performance and long service life in harsh environments.








Qingdao Yida Tongtu Machinery Technology Co., Ltd., in the beautiful coastal city of Qingdao. Specializing in high-growth ventures such as valves and power equipment, the company is dedicated to providing comprehensive solutions for industries including petroleum, chemicals, and water utilities, empowering clients to grow and achieve success.
We are a cutting-edge trading enterprise specializing in one-stop industrial valve matching, deeply cultivating gate valves, globe valves, ball valves, check valves, butterfly valves, etc. Our main products include American standard API, German standard DIN, and Japanese standard JIS, suitable for various industries such as chemical, petroleum, gas, power, metallurgy, etc.
We selects qualified factories from the source, strictly controls product quality, adheres to the direct supply mode, and relies on the advantages of a streamlined and efficient team to achieve rapid implementation of customer demands. At the same time, we can provide customers with standard spot goods, non-standard customization, OEM, project batch matching, and a complete set of export documentation services, becoming a long-term stable valve procurement partner for customers with professionalism, reliability, and high cost-effectiveness.












Our mission is to offer "High Quality" & "Good Service" & "Fast Delivery" to help our clients to gain more profits.