YB110, YB116 type vacuum regulator valve, a diaphragm or piston type pressure regulating valve. Diameter less than DN50 suggested the use of Y110 and Y116 (screwed) diaphragm-type valve; DN50 caliber greater than or equal suggested the use of Y410 and Y416 (flange) piston-type valve. Such valves are adjustable-type valve, the pressure after the valve can be adjusted as needed before it is put to use, and put into use after the valve pressure is always reduced and stabilized at the set value, not because of fluctuations in the valve before pressure, flow and change. Valve material quality (nylon reinforced rubber diaphragm diaphragm), reliable performance and long service life.