ZERO EMISSIONS RECIPROCATING PUMP

摘要

A sealing system for a pump having a plunger includes a housing having
an internal chamber adapted to receive a portion of the plunger. Primary and
secondary seals are located within the internal chamber and adapted to
sealingly
engage the plunger. The primary seal communicates with the fluid being
pumped. A barrier fluid chamber contains a barrier fluid in contact with the
primary seal and the secondary seal. A pressure referencing device has an
inlet
port in communication with the pumped fluid and an outlet port providing fluid
at a
pressure magnitude equal to a peak pressure of the pumped fluid. A
pressurizing device is in communication with the fluid at the peak pressure
and
the barrier fluid to maintain the barrier fluid pressure at a magnitude
greater than
the peak pressure of the pumped fluid such that the pumped fluid is restricted

from leaking past the primary seal.