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GroundwaterSoftware.com
520 Chicopee Row
Groton, MA, 01450
Tel: (978) 502-6001
Fax: (978) 477-0250
E-mail Us Here

 
 
Solinst 404 Inertial Pump
A simple, reliable inertial pump using proven technology, in an elegant manner to suit the needs of modern groundwater monitoring.



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 Solinst 404 - Item 100883 - 5/8"x1/2" HDPE hi-den polyethylene tubing - 100' roll $31.02
 Solinst 404 - Item 100884 - 5/8"x1/2" HDPE hi-den polyethylene tubing - 200' roll $62.04
 Solinst 404 - Item 101281 - D16 Footvalve (5/8" Delrin) for 5/8" O.D. tubing $10.34
 Solinst 404 - Item 101282 - D25 Footvalve (1" Delrin) for 5/8" O.D. tubing $4.94
 Solinst 404 - Item 101285 - SS16 Footvalve (5/8" SS) for 5/8" O.D. tubing $37.60
 Solinst 404 - Item 101286 - SS19 Footvalve (3/4" SS) for 5/8" O.D. tubing $78.02
 Solinst 404 - Item 105867 - Mini Inertial Pump $10.34



Page Content

 

    Solinst 404 Inertial Pump (Wa Terra Pump) Overview

    Solinst 404 Inertial Pump (Wa Terra Pump) Principles

    Applications and Features

    Tubing, Footvalves and Flow Rates

    Disposable Filters


Solinst 404 Inertial Pump (Wa Terra Pump) Overview

 

  • Ideal as a dedicated sampler
  • Excellent in silty/sandy enviroments
  • Easily operated by hand
  • Low cost and convenient

 

Available from GroundwaterSoftware.com, the Inertial Pump (Wa Terra Pump) is a simple, reliable inertial pump that provides a cost effective sampling option for groundwater monitoring as well as functioning as a dedicated sampler. The Pump consists of a riser tube fitted with a one-way foot valve. It can be easily operated manually, or by using a surface pumping mechanism. The tubing and foot valves come in various sizes suitable for varying well diameters and sampling applications. Effective to depths of 200+ ft (60+ m) in 0.4" - 6" ID wells (12 mm - 150 mm).

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Solinst 404 Inertial Pump (Wa Terra Pump) Principles

 

 

The Inertial Pump (Wa Terra Pump) is a simple, reliable inertial pump that provides a cost effective sampling option for groundwater monitoring. The Pump consists of a riser tube fitted with a one-way footvalve. It can be easily operated manually at shallow depths, or by using a surface pumping mechanism. The tubing and footvalves come in a range of sizes suitable for most well diameters and sampling applications. A 1/4" (6 mm) Mini Inertial Pump is available for sampling inside CMT Multilevel Systems (See Solinst Model 403 Data Sheet on GroundwaterSoftware.com.) The Inertial Pump is a simple alternative to using a bailer for cost effective groundwater sampling, both are available from GroundwaterSoftware.com Like a bailer, the key part is the check ball which is located in the foot of the pump. As such, the Inertial Pump is often referred to as a 'footvalve'. 

Operation as Recommended by GroundwaterSoftware.com

To obtain a sample, hand-thread a footvalve onto the tubing, and then lower to the desired depth in a well or borehole. Repeatedly lower and raise the assembled tubing and footvalve approximately 6" - 12" (15 - 30 cm). A slug of water enters the tubing on the downward stroke and is retained, as the valve closes, on the upward stroke. This enables the water to gradually rise in the tubing and discharge at surface. It is very easy to operate the pump by hand for cost effective groundwater sampling, but if preferred, Surface pumping mechanisms powered manually, or by gasoline or electricity are available. Delrin® Surge Blocks are available to fit any footvalve and well diameter up to 6" (150 mm). The Surge Block creates a strong churning effect, which helps remove silt and fine sand during well development for both efficient and cost effective groundwater sampling. 

 

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Applications and Features

 

 

From left to right: SS10, SS16, SS19, D13, D16, D25 and D32 Inertial Pumps

Features
  • Easily operated by hand
  • Ideal for well development
  • Operates to 200+ ft. (60+ m)
  • For 0.4" - 6" ID wells (12 mm - 150 mm)
  • Efficient purging rates, and high quality samples
  • Essentially maintenance free
VOC Samples

To obtain high quality VOC samples, use approximately 8 ft. of 1/4" diameter (2.5 m of 6 mm) sample tubing inserted into the riser tube, leaving about 1 ft. (30 cm) protruding. Develop a steady flow of water, and upon ceasing, the sample tube will continue to act as a gravity flow siphon and produce undisturbed VOC samples. To collect VOC samples, free of any contact with the air, Solinst recommends the Model 407 Bladder Pump. (See Solinst Model 407 Data Sheet on GroundwaterSoftware.com.)

Ideal as a Dedicated Sampler
  • Low cost
  • Avoids cross-well contamination
  • Eliminates repeated pump decontamination
  • Avoids costly field and wash blanks
  • Reduces time in the field
  • Fast, easy operation

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Tubing, Footvalves and Flow Rates

 

Riser Tubing

High density polyethylene (HDPE) tubing is most frequently used. It provides high strength, durability and good sampling properties for cost effective groundwater sampling. Available in various sizes, the tubing comes in coils of 100, 200, or 500 ft. (30, 60, or 150 m). Teflon® tubing is also available.

Footvalves

Footvalves consist of a check ball inside the valve body, and are available in Delrin or stainless steel, in a variety of sizes from 3/8" to 1-1/4" (10 mm to 32 mm) diameters. Tapered threads enable the footvalve to self-tap onto either end of the riser tubing.

 

 

Flow Rates

Flow rate is a function of the momentum generated in the tubing. It varies with tubing length, submergence depth of the footvalve, flexing of the tube, and the rate at which the tubing is pumped. Up to 7.6 L/min (2 gpm) with 5/8" x 1/2" (16 mm x 12.5 mm) tubing Up to 15 L/min (4 gpm) with 1" x 5/6" (25 mm x 21 mm) tubing Higher volumes are obtained with the use of electric or gasoline powered surface pumping mechanisms.

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Disposable Filters

 

In-line Disposable Filters

 

High flow, in-line disposable/dedicated sampler filters have a 0.45 µm membrane. They have a 700 cm2 filtration area, to effectively prepare samples for dissolved metals analysis, or to filter large volumes of turbid groundwater. They fit 1/2" and 3/8" (12.5 mm and 10 mm) tubing and a barb is also included which fits 5/8" (16 mm) tubing. These filters can also be used with most other Solinst sampling devices for cost effective groundwater sampling. (See Solinst Model 860 Data Sheet.)

Pumping Mechanisms

A surface pumping mechanism handles larger volumes of water and provides higher pumping rates for longer periods of time. The HydroLift II electric pump, gasoline Power Pump II, and Hand Pump Handle are available.

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