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  • Diffusion characteristics of the pump casing
    Diffusion characteristics of the pump casing For general diffusion pump, pump more than made straight type; for large pumps, but also useful or convex cylindrical cone-shaped cavity pump. Due to the ...

  • Gas migration
    Gas migration Molecules on the surface moving in is called migration. In a hot state of motion of gas molecules, are divided by a space to go to another part, the physical quantities (energy, momentu...

  • Roots vacuum applications in respect of petroleum products refined
    Roots vacuum applications in respect of petroleum products refined (1) dry gas oil in the gas oil product contains water if minimal scene, it will make it muddy color is not bright, greatly reducing ...

 
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