Significant Features in Reciprocating Pump Arrangements

Triplex, three piston (not used as steam driven) 

Piston packed packing mounted on piston and moves with piston applied to comparatively low pressures 

Applied Process Design for Chemical and Petrochemical Plants 

The liner (grey area) is in full-capacity position with the seal point at the top and the pumping chamber at the bottom All liquid coming into the pump at the left is moving out of it at the right. 

Now the liner has been rotated counterclockwise. which opens the seal point at the top. This allows part of the liquid to be recirculated, reducing the net flow by a proportionate amount 

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Significant Features in Reciprocating Pump Arrangements, 215 Performance, 217 Discharge Flow Patterns, 218 Horsepower, 218 Pump Selection, 221. 

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