Double Displacement Pump The Harbison-Fischer Double Displacement Pump is an insert pump with a production capacity greater than a tubing pump for the same size tubing. It provides the benefits of an insert pump and greater production when tubing size is limited. It is a traveling barrel pump with two barrels, two connected plungers and a seal section between the barrels. The larger plunger displacement is obtained by combining the areas of the upper and lower plungers minus the area of the connecting plunger. The capacity of the 1-1/2" bore is 14% greater than a 1-3/4" tubing pump. The 2" bore produces 29% more fluid than a 2-1/4" tubing pump. The Harbison-Fischer Double Displacement Pump uses oversized cages,
balls and seats as well as an oversized, special seating assembly with
greater holding capacity. It is also available in a stationary barrel
design. All materials for corrosion or abrasion resistance are available
for this pump. |
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