Model 408 Double Valve Pump

High Quality Sampling: - gives excellent VOC results, comparable with bladder pump results. (See paper on VOC Retention by Baerg et al, presented at 1992 National Groundwater Sampling Symposium - available through Solinst.)

Deep Applications: - standard systems are suitable to depths of 500 ft. (150m). Specialized controllers, tubing, etc. can be supplied for depths up to 2000 ft. (600m).

Non-Vertical Applications: - operates effectively at almost any angle and can be placed under landfills, tailings, storage tanks or plumes.

Miniature Model: - has a dia. of 5/8” (16 mm) to allow cost-effective sampling from wells as small as 3/4" dia. (19 mm).

Low Cost PVC: - makes dedication more feasible on projects where budgets are tight. The lower capital cost allows several PVC pumps to be dedicated for the cost of one portable stainless steel pump. Further savings are subsequently gained through shorter field operating times. A weight may be used to overcome buoyancy.

PVC pumps are also useful for applications where tainless steel is unsuitable such as:

metals analysis

sampling highly corrosive liquids

Leachate/Product Pumping: - stainless steel, pneumatic drive pumps are well suited for pumping contaminant liquids. High solids content, strong solvents and corrosive chemicals are easily and economically pumped. Survives dry pumping, dirty air and sand.