Geotech 0.675, Инструкция по установке и эксплуатации

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Section 1: System Description
Function and Theory
Geotech’s pneumatic Portable Bladder Pumps operate with a unique action, ideal for both
gentle low-flow sampling and higher flow rate purging. Timed ON/OFF cycles of
compressed air alternately squeeze the flexible bladder to displace water out of the pump
to the surface and then exhaust the air allowing the pump to refill.
Fluid enters the pump through the fluid inlet check valve at the bottom of the pump body
via hydrostatic pressure. The pump must be submerged to operate.
The bladder then fills
with fluid. Compressed air enters the space between the bladder and the interior of the
pump housing. The intake check valve closes and the discharge check valve (top) opens.
Compressed air squeezes the bladder, pushing the fluid to the surface (see figure 1-1).
The discharge check valve prevents back flow from the discharge tubing. Driven by the
Bladder Pump Controller (BP Controller) or Geocontrol PRO, this cycle automatically
repeats.
Compressed air does not contact the sample. The bladder prevents contact between the
pump drive air and the sample.
Figure 1-1: Bladder Pump Operation