Introduction of straight pipe section for welding butterfly valve front and rear position

The working environment temperature of butterfly valve should be no more than 95% of relative humidity (-30 ~+60). There should be straight pipe section in front and back of butterfly valve, and the length of pipe should be no less than 10 times of pipe diameter (10D), so as to avoid the short straight pipe section of butterfly valve and influence the flow characteristics. Before installing butterfly valve, read the instruction manual. The instruction manual introduces the product, safety precautions and precautions that should be paid attention to before and during installation.

Confirm that the welded butterfly valve pipeline is clean: Foreign matter in the pipeline may damage the sealing surface of the welded butterfly valve or even hinder the movement of the spool, ball or butterfly plate, resulting in the valve not closing properly. In order to reduce the possibility of dangerous situation, it is necessary to clean all pipes before installing butterfly valves. Confirm that welded butterfly valves have removed pipe dirt, metal debris, welding slag and other foreign bodies. In addition, check the pipe flange to ensure a smooth gasket surface. If welded butterfly valves have threaded connections, high-grade pipeline sealants should be coated on the positive threads of the pipeline. Do not apply sealant on the screw, because the excess sealant on the screw will be squeezed into the valve body. Redundant sealants can cause the accumulation of plugs or dirt in the spool, which can lead to the valve not closing properly.