The Chemtube 2000 provides accurate metering and transfer of a wide variety of chemicals and is available in three-piston sizes (52, 68, and 88mm), four stroking speeds (36, 72, 96, and 144 strokes per minute), and simplex or a double simplex arrangement.
The liquid end uses two diaphragms. A flat disc diaphragm and tubular diaphragm form a sealed intermediate chamber between the process fluid (inside the tubular diaphragm) and the hydraulic fluid (inside the piston displacement cylinder). The liquid surrounding the tubular diaphragm is a water/propylene glycol mixture (50/50) and is compatible with most process fluids. There are no mechanical connections between the two diaphragms and the pump drive. Both diaphragms are hydraulically balanced during pump operation. The disc diaphragm is driven by hydraulic fluid, which is driven by the pump piston. The piston causes the liquid in the intermediate chamber to displace the tubular diaphragm and create pumping action with each stroke of the piston.
The pump features built-in, adjustable pressure relief valve and cartridge type valves for ease of service; an automatic hydraulic fluid make-up valve that is mechanically actuated by sensing the position of the flat intermediate diaphragm; a stroke adjuster (manual or optional electric) that is capable of varying the stroke from zero to 100%; and the electronic leak detection system that monitors the conductivity of the intermediate fluid and will automatically signal a change due to leakage through the tubular diaphragm of the process fluid. Also, when the optional Teflon-lined tubular diaphragm is used, the Chemtube 2000 pump is capable of handling a variety of corrosive fluids.
When an electric stroke length positioner or variable speed drive is used with the pump, a separate instruction manual covering the equipment used will be furnished.