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GroundwaterSoftware.com
520 Chicopee Row
Groton, MA, 01450
Tel: (978) 502-6001
Fax: (978) 477-0250
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Solinst 408M
The Solinst Micro Double Valve Pump (DVP) is a pnuematic drive pump with a small and flexible design.



408M.jpg
 Solinst 408M - Item 108220 - micro DVP 90ft PTFE Assy. $865.74
 Solinst 408M - Item 108219 - micro DVP 140ft PTFE Assy $1,248.32
 Solinst 408M - Item 108218 - micro DVP 240ft PTFE Assy $2,026.64
 Solinst 408M - Item 110603 - Filter Assembly for the Micro Double Value Pump $28.20
 Solinst 408M - Item 108120 - 3CH Multipurge Pump Manifold Assembly (3 pump) $240.64
 Solinst 408M - Item 107523 - 7CH Multipurge Pump Manifold Assembly (3 pump) $240.64



Page Content

 

    Description

    Features

    Applications

    Operation

    Applications

    Accessories


Description

The Micro Double Valve Pump (Micro DVP) is a pneumatic pump similar to a Bladder Pump, but using coaxial Teflonฎ tubing, rather than a Teflon bladder to give high quality samples. It is small enough to fit in 1/2” (13 mm) tubing and all channels of the Solinst Model 403 CMT Systems, as its diameter is only 3/8” (10 mm). The unique combination of flexibility and size make the pump easy to transport and install in a variety of applications.


The Micro DVP is ideal for low flow sampling and narrow down-hole applications. Flow rates of 20 to 150 ml/min, are obtained, with very small associated purge volumes from within the narrow applications. The Micro DVP is durable and easy to operate using the pre-sets and fine tubing capabilities built into the Solinst Model 466 Electronic Control Unit.

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Features

 

Design & Construction

The Micro DVP uses coaxial Teflon tubing in lengths of 50’, 100’, 150’ and 200’ (15 m, 30 m, 50 m and 60 m). The 50 ft. (15 m) pump is also available with LDPE outer drive tube and a Teflon inner tube. The pump body and filter is 6” x 3/8” (150 x 10 mm). It is constructed of coaxial Teflon tubing with stainless steel fittings and a 100 mesh stainless steel filter. Filters are easily cleaned and replaced. A manifold at the top end of the pump has a 3/16” (5 mm) Teflon sample tube and a quick-connect fitting for easy attachment to the Control Unit. A multi-purge sampling head is also available for use with the CMT System.

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Applications

 

Groundwater sampling in:

  • CMT and Waterloo Multilevel Systems
  • Direct-Push/Drive-Points
  • Low flow monitoring in narrow diameters

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Operation

 

Operation

Formation water enters through the filter under hydrostatic pressure into both the inner Teflon tube and the annulus of the coaxial tubes. Drive gas/air is cycled down the annular space between the two tubes to close the lower check valve and push the water up the inner sample tube. The pump is then vented to allow new formation water to enter both tubes under hydrostatic pressure. Air/gas pressures are carefully controlled at all times to ensure that the air/water interface never enters the body of the pump. Repeating the pressure/vent cycle brings the high quality sample to the surface at a controlled rate. The Micro DVP operates with 2 ft (0.6 m) or more head of water above the intake.

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Applications

 

  • Only 3/8” (10 mm) in diameter
  • Flexible Teflon, goes almost anywhere
  • Inexpensive and readily dedicated
  • Narrow applications

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Accessories


The 466 Electronic Control Unit controls the supply of compressed gas to pneumatic pumps including the Integra Bladder Pumps and Double Valve Pumps. The Control Unit uses simple, preset sample modes to allow easy selection of the desired sample rate, with controls for further fine- tuning. The sampling rates may be selected to ensure a representative low-flow sample at 100 ml/min or less. Higher flow rates for purging may also be chosen. The Electronic Control Unit is available in 160 psi and 250 psi models. The Controller uses 8 AA batteries, that allow continuous operation for up to 30 hours, and can be easily replaced in the field.

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