Butterfly valve, also called the flap valve, which is a kind of simple structure of the regulator, also can be used in low pressure pipeline medium valve butterfly valve in the switch control the way work is closed a (disc or disc) is a ...
Tags: Butterfly Valve, Rod Valve
Thermal expansion pipe is divided into seamless steel pipe and hot expanded seamless pipe, ERW high frequency by the former straight seam welded steel pipe hot expanding processing, the weld heat treatment at intermediate frequency weld ...
Tags: Pipe Welds, Machinery