Operating Principles
When the Solinst Bladder Pump is placed in a well or borehole, water rises inside the bladder and sample tubing to static level. Compressed nitrogen or air is supplied to the pump via the drive tubing using a control unit. Applying pressure causes the bladder to compress and closes the bottom check valve, forcing water from the bladder into the sample tubing.
During a vent cycle the pressure is released from the drive tubing. The bladder returns to its initial state as water re-enters the pump, while the top check valve prevents water already in the sample tubing from falling back into the bladder. Cycling the drive and vent provides water flow, the rate of which can be adjusted for purging or sampling.
Pump Operation
Portable: The Pump will be attached to skip-bonded, dual 1/4" OD tubing, mounted on a reel.
- Push the tubing onto the Drive and Sample Stems of the Bladder Pump and secure using dual-ear Oetiker Clamps.
- Lower the assembled Bladder Pump into the well. The Solinst Model 103 Tag Line can be used as a safety line if required.
- Connect the supply line with the in-line dryer from the compressed gas source to the Control Unit. The drive line connects from the Control Unit to the reel.
- Attach a short (3 ft. or 1 m) length of 1/4" OD sample line to the sample connector on the reel.
Dedicated: The Pump will come with a roll of tubing to be cut to length, as required, for attachment to a Wellhead.
- Cut the tubing to desired length. Push the tubing onto the Drive and Sample Stems of the Bladder Pump and secure using dual-ear Oetiker Clamps.
- Attach the sample line and drive line to the appropriate Push Fitting on the underside of the Wellhead. (See diagram below for use of Push Fittings.)
- Lower the Bladder Pump into the well, using a stainless steel safety line connected to the Suspension Hook on the Wellhead, if desired. Push the Wellhead down firmly onto the riser casing.
- Attach a short (3 ft. or 1 m) length of 1/4" OD sample line to the sample connector on the Wellhead
- Connect the supply line with the in-line dryer from the compressed gas supply to the Control Unit. the drive line connects from the Control Unit to the top of the Wellhead.
- For detailed pumping instructions, please see the 466 Control Unit Operating Instructions.
Notes: |
- The maximum depth for 1" Bladder Pump operation is 500 ft. (150 m) below grade.
- DO NOT exceed an operating pressure of 250 psi.
- The pump has been decontaminated before leaving Solinst, however, you may wish to decontaminate your pump before use. The pump should be decontaminated between wells.
- Refer to the operating instructions in the lid of the Solinst Model 466 Control Unit for detailed pumping instructions.
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® Solinst is a registered trademark of Solinst Canada Ltd.
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