日本不卡一区二区免费,国产一卡二卡三卡四卡免费,国产乱老熟视频胖女人,国产又粗又猛又大爽又黄

1.Three-eccentric seal structure, seat and disc almost no wear, with the more closed more tightly sealing function.

2.Seal ring made of stainless steel, with dual benefits of metal seal and flexibility. No matter in the case of low temperature or high. Both with excellent sealing properties, resistant to corrosion, and long service life.

3.Disc sealing surface using cobalt-based alloy welding, sealing surface wear resistance and long service life

4.Large size disc using lattice structure, high strength, flow area large, small flow resistance.

5.The valve has a two-way sealing function, the installation media from the flow restriction are not subject to the impact of spatial location. Can be installed in any direction,

6.Drive can be multi-position(rotated 90°or 180°)to install. Easy to use.

D343H-10/16/25/The main external connection dimensions of Worm Gear Hard Seal Butterfly Valve.(unit:mm)

(1)Clean cavity and the sealing surface; dirt adhesion is not allowed.

(2)Check whether the conjunction of the thread is evenly tightened.

(3)Check whether the packing is compressed in order to keep the seal of the packing.

Check whether the switch button and the porous socket of the electric device are in normal condition when installing the electric valve

(5)Check whether the electrical devices function well.