For low-flow ground water purging and sampling.

The pneumatic Mini Bladder Pumps are designed to obtain a representative ground water sample with the assistance of a controller to provide variable flow rates. The controller allows the user to match the pumping rate to the well recharge rate, limiting the stress on the formation. With the small volume per cycle, the fluid velocity at the pump inlet is substantially reduced, making the pumps ideal for low flow sampling.

 

The high efficiency design enables pump rates from 5ml to nearly 2L/min when used with one of our Precision Dual Range Controllers. The 1.66 in diameter pump will produce flow rates up to 2 gpm.

 

Tech Tip: The amount of pump submergence will affect the pump flow rate. Pump curves were developed with 10 ft submergence.

 

The bottom inlet of the pump is positioned at the desired sampling point, generally at the mid section of the well screen. The inner Teflon® bladder will fill with fluid based on the submergence of the pump. The annular space is pressurized using the controller and the liquid is gently lifted to surface. All pumps can be supplied contaminant free.

 

Tech Tip: In portable applications, the pump is easily decontaminated by submersing it in a cleaning solution such as Alconox®. Then the pump is cycled to circulate the solution through the internal components. This method avoids the need to replace bladders after each use.

 

Dedicated assemblies can be supplied to reduce cross contamination, well disturbance and facilitate installation. The pump, tubing and well cap assemblies are plastic bagged and each assembly is identified with your well ID number and the well depth.

 

Selection Table for Mini Bladder Pumps
Type	Stainless Steel			PVC
Diameter	1/2 in	3/4 in	1 in	1.3 in	1.66 in
Part Number	TR-042	TR-037	TR-035	TR-070	TR-071
Body Length (nom.)	18 in			14 in	20 in
Stroke Volume	20 mL	51 mL	95 mL	35 mL	175 mL
Max. Rated Flow Rates* (mL/min):
0 ft*	460	1500	1800	1400	2000
50 ft*	240	600	750	600	1500
100 ft*	100	300	500	300	800
150 ft*	40	130	200	130	400
Max. Lift	100 ft	150 ft	150 ft	150 ft	200 ft**
Tubing Size	1/8" OD x .095 ID Nylon for air supply and 3/16"OD x .125 ID Teflon tubing for discharge	1/4 in OD x 1/4 in OD			1/4 x 3/8 in
Weight	12 oz	12 oz	18 oz	14 oz	2 lb
Materials	Body: 304 stainless steel Bladder: flexible Tefon®			Body: 304 PVC Bladder: Tefon®

   Mini Bladder Pumps (60,47 KB)