The Solinst Double Valve Pump (DVP) is a pneumatic drive pump that allows consistent, high quality samples. It has been field proven in thousands of applications.
It offers excellent performance and reliability. No bladder replacement is required, and the Double Valve Pump provides higher pumping rates than with the Solinst Bladder Pump. There is a selection of sizes and materials, variable flow rates, and it is field serviceable.
The DVP is suitable for low flow or regular flow sampling. The stainless steel pumps can operate to depths of 500 ft (150 m).
For long term monitoring it is best to dedicate the pumps to reduce sampling time and avoid cross-contamination. Dedicated well caps are designed for ease of use. Caps easily slip onto 2" or 4" wells, and have quick-connect fittings for the drive tubing and easy push-fit connections for the sample tubing.
For less frequent sampling, reel mounted portable systems allow access to multiple monitoring wells, even in remote locations. The reel mounted portable units are free-standing with a convenient carrying handle. They can be made for almost any size or depth of application.
Solinst offers Double Valve Pumps in 316 stainless steel with Viton® o-rings. The two standard pump body sizes are:
• 5/8" dia. x 1 ft long (16 mm x 305 mm)
• 1.66" dia. x 2 ft long (42 mm x 610 mm)
Standard dedicated systems use 1/4" OD (6 mm) sample and 3/8" OD (10 mm) drive tubing. Adaptors for both 1/4" and 3/8" OD (6 mm and 10 mm) tubing are included. Portable systems use dual 1/4" OD (6 mm) skip-bonded tubing.
Everything is easily accessible or replaceable without the need for tools. All components can be cleaned with mild detergent or non-phosphate soap.
Survives Dry Pumping, Dirty Air and Sand
Pumps are not damaged by operation in sediment laden water, or in dry pumping conditions.
Saves Time and Costs
Low flow sampling reduces purge volumes and the time it takes to obtain a sample. There is less need for repeate sampling, which reduces the time needed for each sampling round.
Part of Simple System
The air compressor or tank, pump controller, and flow-through cell are easily transported to each site with the DVP. Compression fittings, quick-connect, and push-fit connections allow simple attachment to well caps or portable reels.