Influential factors leading to losing efficacy of the three way valve are analyzed, and some remaking measures are employed, including ball valve shim made from X resin ,fluorubber O shaped seal circle in the slit between the valve body and the valve cover.

Two design strategies that three-way valve control unsymmetrical cylinder and four way valve control symmetrical cylinder were analyzed from principle and system structure aspects.

Introduced a hydraulic dynamical outfit control system with three-way valve and differential hydro cylinder.

Integrating the principle with characteristic of regulating valve, several problems of three-way valve used in air conditioning water system are analyzed.

When cleaning medium enters the mixing chamber of the sprayer with certain pressure and flow ,together with the high pressure gas entering the mixing chamber,it is sprayed through the nozzle to the outside surface of triple valve with high kinetic energy to clean the surface dirt.