Ultra low temperature valve design standards: 1. Design: API6D, JB/T77492. Routine inspection and test of valves: API598. 2. Low temperature inspection and test of valves: according to JB/T7749. 3. Drive mode: manual, bevel gear drive and electric drive device. 4. Valve seat form: the valve seat is of welded structure, and the sealing surface is welded with cobalt base carbide to ensure the sealing performance of the valve. 5. The ram adopts elastic structure, and the pressure relief hole is designed at the pressure inlet end. 6. The one-way sealed valve body is marked with a flow direction sign. 7. Low temperature pneumatic ball valve, gate valve and globe valve adopt long neck structure to protect the packing.

1、 Overview of pneumatic ball valve: pneumatic ball valve is a ball valve equipped with a pneumatic actuator. The pneumatic actuator has a relatively fast execution speed, with the fastest switching speed of 0.05 seconds per time, so it is usually called pneumatic quick cut-off ball valve. Pneumatic ball valves are usually equipped with various accessories, such as solenoid valves, air source processing triplets, limit switches, positioners, control boxes, etc., to achieve local control and remote centralized control. The valve can be opened and closed in the control room without the need to run to the site or high altitude and dangerous areas for manual control, which greatly saves human resources, time and safety