精品人妻无码一区二区三区网站_69堂亚洲国产日韩精品无码专区成人妻中文字幕一区二区三区在线久久久久_77777人妻少妇毛片A片

Reciprocating vacuum pump equipment and environmental requirements

(1) The pump body is clean and there is no dust and oil on the outside. (2) There is no water, waste liquid or other debris on the surface and surrounding of the base. (3) There must be no leakage at the valve and fittings. (4) The leakage of the packing seal does not exceed...

Vacuum pump unit appears vibrating

When the vacuum pump unit appears vibrating, it is necessary to pay attention to the installation of the spring isolator, which is because of the choice of the spring isolator of the vacuum pump unit; in general, the self-standing spring damper will also be used. If it is simple in structure ...

Product use of Vertical oil-free vacuum pump

WLW Vertical oil-free vacuum pump Oil-free (corrosion-resistant) vertical reciprocating vacuum pump is a replacement product of W-type horizontal vacuum pump, which is the main equipment for obtaining rough vacuum. The complete isolation of the crankcase and the cylinder is achieved by the use of...