Groundwater Pumping and Sampling Hire
Solinst 410 Peristaltic Pump
 The peristaltic pump is a reversible pump that can be used for vacuum pumping or for delivering liquids or gases. Silicone tubing runs through the U-shaped pump mechanism where it is clenched shut at 2 points by plastic rollers holding a volume of air between them. The rollers push the air in the direction dictated by the controller creating a negative pressure behind them and a positive pressure in front. By the time the 2nd roller has lost contact with the tubing, the 1st roller has already clenched the tubing off at the start of the next cycle creating a greater negative pressure on one side and greater positive pressure on the other.
As a vacuum pump, the lift is dictated by the surrounding air pressure. At sea level it can lift approximately 10 m, the lift decreases proportionally to height above sea level.
Solinst 425 Discrete Interval Sampler
Applications
Sampling from below LNAPL layers and Sampling of LNAPL and DNAPL
Interval sampling in lakes, rivers and wells
Sampling at points of inflow to a well
The Discrete Interval Sampler is a stainless steel chamber attached to a reel via a length of LDPE tubing. The reel has a pressure attachment for pressurising and venting the chamber. Pressure is applied using a high-pressure hand pump.
The chamber is pressurised initially which forces a check-ball valve at the bottom downwards, preventing water from entering. When the sampler is at the desired depth, the attachment on the reel can be switched to the vent the internal pressure allowing the chamber to be filled by the hydrostatic pressure around it. At the top of the chamber there is a polypropylene check-ball that floats and closes the valve when water fills the chamber preventing sample from coming in contact with the tubing. This provides a high quality VOC sample as organic compounds will not be lost via adsorption onto the LDPE tubing.
Global Water 12 V DC Whale Super Purge Pump
Global Water's groundwater purging pumps provide an easy‐to‐use, high‐quality, economical solution for purging, and groundwater testing to a depth of 18m, with a maximum flow rate of 11.4 L/min. The submersible groundwater testing purging pump's 40mm (1‐5/8”) diameter minimizes well hang ups and is ideal for use in 2” or larger monitoring wells. Each purging pump is self priming when fully submersed and can be connected to a DC power source to begin pumping. Sand, rocks or debris that pass through the groundwater testing purging pump’s inlet strainer will not result in clogging. The ground water purging pumps can be run continuously for 48 hours and the groundwater testing purging pump’s life expectancy is approximately 400+ hours.
QED Sample Pro Bladder Pump
The Sample Pro Portable MicroPurge Pump is the first pump developed specifically to bring the advantages of low-flow sampling to sites where groundwater samples are collected from many monitioring wells with the same pump. The Sample Pro Pump is easy to disassemble, without any tools, and simple to clean to eliminate any potential cross contamination. That includes the Sample Pro disposable bladder, which snaps in and out without any clamps, so they can be discarded after each well is sampled. The pump is available in two diameters: 1.75" (4.45cm) to fit in 2" (50mm) monitoring wells or larger; and 3/4" (1.91 cm) to fit small diameter wells and direct-push boreholes. Both pump models are capable of pumping from depths up to 200 feet (61m).
Solinst 407 Bladder Pump (Available in 1.66” and 1” diameter)
The Integra Bladder Pump is a bottom filling bladder pump suitable for both low-flow and regular-flow sampling. Two lines are attached to the top of the pump, one for “air in”, and another for “sample out”. In its relaxed state, water enters the pump from the bottom through the intake filter and fills the bladder inside. In its drive state, compressed gas flows into the pumps and applies pressure laterally to the bladder causing it to depress. A check-ball valve at the bottom closes forcing the water up the pump and out the “sample out” line and the cycle starts again.
The bladder ensures there is no contact between the air and the sample and is available in disposable LDPE or reusable PTFE. The Integra can lift from 150 m and is available in 25 m and 42 mm diameter stainless steel, or 42 mm diameter PVC. It is also easily convertible to a Double Valve Pump
Solinst 408 Double Valve Pump
The Double Valve Pump (DVP) is a pneumatic pump suitable for low-flow sampling, non-vertical applications and leachate/product pumping. Unlike a bladder pump where the water fills the pump and is then pushed out, in the DVP the system is “open” so the water rises through the pump and up the sample and air lines until it equilibrates at the static level. Compressed gas is pushed down the “air in” line which forces the water back down that line closing a check-ball valve at the bottom of the pump and up the “sample out” line. When the pressure is released, the water refills the pump and the “air in” line, while an upper check-ball valve prevents water in the “sample out” line falling back down. The DVP can be operated such that with a short enough drive time and a low enough applied pressure, compressed gas will never enter the pump body and thus high quality samples for VOC analysis can be taken.
Silex SPP2 Pneumatic Auto Pump (Available in 45 mm and 80 mm diameter)
Applications
Leachate and wastewater pumping
Operation
The SPP2-TL is 45 mm wide and can therefore be deployed in wells with a 50 mm or greater diameter and can sustain a flow rate of 4L/min at a maximum depth of 60 m. It is an entirely automatic pump utilizing a float-trigger system that does not require a pump controller to regulate gas flow, merely a compressed gas source. 3 lines are attached to the pump, air in, air out and sample discharge. As water enters the pump from the bottom, a plastic float rises with it. When the reservoir is full the float hits a trigger and compressed gas enters the pump from the top forcing the water down and out the discharge line. The float then hits another trigger at the bottom returning the system to its original state and starts the fill sequence again.
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