Standards
Design and manufacturing: GB12236
Structure length: GB12221
Pressure-temperature scale: GB9131, JB/T74, HG20604
Connection flange: JB/T74, GB9113, hg20592-20635
Test and test: JB/t9092-1999, GB13927
Features
Internal thread check valve, high precision, appearance beautiful, modelling is small, with the spring mechanism, vertical and horizontal installation are etc. Mainly used in the pipe system to prevent the reverse medium is used, the function of internal thread check valve is used to prevent the backflow medium pipeline.