four-way valve through a positive and negative water supply Industrial Valves switch. Every turn 90, water supply mode switch. Need four valves before. Water supply, open the valve 1 and 4, 2 and 3 off valve. When water supply reverse, 2 and 3 open valve, the valve closed 1 and 4. Now using four-way valves instead of, easy to operate. The structure characteristics and application of spool valves: 1. Low fluid resistance: the spheroid and the valve body section is equal, sphere channel assumes the circular arc connections. Through a medium sphere has a low fluid resistance. 2. Sealed performance is good: seat USES the elastic deformation and high strength of ptfe material, sealed performance is good, can guarantee the stability of the valve. 3. Long service life, the valve core and light neck austenitic stainless steel, the seat material adopts teflon, has good corrosion resistance, prolong the service life of the valve.

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