国产成人在线观看_青青草91视频_日韩一二在线_天天操91_国产精品内射后入合集_四库成人免费视频

Pneumatic Central Line butterfly valve is a butterfly plate rotary center (that is, the valve shaft center) located in the center line of the valve body and butterfly plate on the sealing section of the butterfly valve, the connection mode is sandwich-type and flange type.Middle line pneumatic butterfly valve fluid resistance is small, large diameter butterfly valve full open effective flow area is large, quick opening and closing labor saving, using compressed air to drive disc rotation 90 Angle to complete the opening and closing, can also be equipped with electrical valve locator on the medium flow, pressure, temperature and other parameters to adjust and control.

Product model: D641X
Nominal diameter: DN40-DN1000mm
Material of valve body: ductile iron, 304, 316
Connection: clamping, flanged, lug clamping
Pressure classes: PN1.0mpa, PN1.6mpa
Seat sealing: EPDM: -30℃ ~ 120℃ NBR: -30℃ ~ 80℃ PTFE: -30℃ ~ 140℃ VITON: -30℃ ~ 150℃
Valve plate quality: ductile iron nickel plating, nylon coating, aluminum bronze, 304, 316, 316L, 1.4529, 2507
Stem material: stainless steel 410, 304
Suitable medium: water, liquid, gas, oil, powder, steam, caustic medium.