The MBP pumps consist of:
• PVC or Stainless Steel (SS)
• Teflon bladder
• ½, ¾, 1, 1.3 and 1.66 in
Selection table >>
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 5 mL to nearly 2 L/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
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
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.
Tell us your requirements by filling our Sampling
Pump Requirements Form (PDF, 110 KB).
Bladder Pump, 1/2" x 18"
Bladder Pump, 3/4" x 18"
Bladder Pump, 1" x 18"
Mini PVC Bladder Pumps
Dual Range Controller
> Full-Size Pneumatic Bladder Pumps
For applications that require higher flow rates, full-size bladder pumps are
available with stainless steel, Teflon, or PVC bodies. The pumps fit 2-inch
or larger wells, work to depths of 200 feet, and provide flow rates of up to
> Locking Caps
Locking caps provide a convenient way to suspend bladder pumps in dedicated
installations. The cap has an expandable gland that holds it firmly in place
and seals the well to prevent entry of surface water or contaminants. The
cap includes connections for a stainless steel suspension cable and fittings
for tubing from the pump. A 0.75 inch port allow a water level probe to pass
through so that water level measurements can be made.
For more information
Catalog pages (PDF, 329 KB)
Air Flow and Pressure Loss
table (PDF, 255 KB)
Water Flow and Pressure
Loss table (PDF, 241 KB)