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How does a foot valve work? 1. Tubing/Valve assembly is installed in well. Water level inside tubing rises to that in well. 2. A rapid upstroke closes the foot valve and lifts the water column inside the tubing a distance equal to the stroke. 3. At the end of the upstroke, the water column continues to rise due to its momentum. A further column of water is thus simultaneously drawn into the tube. 4. Pushing the tubing down immediately after the upstroke forces a further column of water into the tubing due to the inertia of the water column. 5. The cycle is repeated and water rises in pulses to discharge at the surface. |
High Flow
The High Flow System is designed to be used in 2 inch wells or larger where a high pumping rate is desired.
This system is also an excellent well development tool in 2 inch piezometers.
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D-32
Delrin D-32 valves with 1.25-in. (32mm) OD tubing is Ideal for: Deep well sampling, Large
diameter wells, Well development, and Sediment-laden wells. Features: Self tapping female
thread, durable, excellent resistance to organics, excellent silt handling abilities and |
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SS-32 The Stainless Steel SS-32 is used when Delrin is unsuitable for your sampling, developing |