... valve (specialize in wine tank), 1pc with internal threaded ball valve, 2pc with internal threaded ball valve, 3pc with internal threaded ball valve3) Check valve ... : Welded check valve, threaded check valve, clamp type check valve, movable check valve 4 ) Diaphragm valve: quick-installed diaphragm valve, triplet diaphragm valve, U-type diaphragm valve5 ...