What is the working principle of pneumatic butterfly valve measured with a multimeter? 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.
2. In order to achieve good measurement effect and longer service life, electrode materials must be selected according to whether the measured fluid is corrosive. Please consult the manufacturer's corrosion manual for details. The following figure shows the common electrode materials and their corresponding corrosion resistance.
