Three Tube Pump
    The Harbison-Fischer Three Tube Pump is the traditional trash pump for efficient operation in extremely abrasive or "dirty" production. The concept of this pump is to have large clearances (.014") between the plunger and barrels, allowing particulates and/or large quantities of particulates to pass between the plunger and barrels without causing them to stick or hang up.

    The Three Tube Pump has the advantages of both a stationary barrel pump and a traveling barrel pump. It is rugged like a stationary barrel pump but has the top valve of a traveling barrel pump that closes when the pump is shut down, preventing particulates from settling into the pump and keeping particulates from settling around the pump's bottom hold-down. Excess slippage is prevented by the long slippage path between the multiple tubes.

    The Three Tube Pump is available with regular or hardened barrels.