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Poppet Valves are not tolerant of uneven flow distribution. The poppet valve is used
in a medium pressure range compressor. Nowadays these types of valves are used in
hydrocarbon service because of easy maintenance.
The Figure shows a drilled crankshaft.
Crankshafts should have removable balance weights to compensate the rotary unbalance
as well as reciprocating unbalances. The crankshaft should be dynamically balanced
when above 800 rpm.
Cross Head十字头
All industrial compressors are equipped with crosshead. The crosshead is used to
guide the piston in the cylinder bore. The following are the advantage of the crosshead.
Backup Ring支承环
The construction of the backup ring is similar to the radial ring. As the name
indicate this type of ring is used to backup all the rings when using in the high-
pressure application.
The packing rings are the important element of rod packing assembly. The below-listed
packing rings are widely used in a reciprocating compressor.
Compartments in the distance piece collect and control packing leakage when the gas is toxic or flammable. The leakage can be direct to a flare or buffer inert gas is used to prevent the toxic gas leakage to the atmosphere.
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