The wastewater treatment process requires the controlled dosing of chemicals into the process stream either to assist the treatment or to remove undesirable elements. In order for the metering pumps to work efficiently, operators need to be constantly aware of what is happening in the treatment process so that dosing levels and speeds can be adjusted accordingly. It is additionally important that the metering pump be durable enough to perform reliably in harsh chemical environments. SEEPEX, a longtime specialist in progressive cavity pump technology, recently introduced the MDR progressive cavity metering pump specifically for those situations.
The SEEPEX MDR range progressive cavity pump is a metering pump that can withstand the harshest of chemicals. Due to an external GA seal arrangement and engineered composite seal housing, lantern and rotating unit, the only metallic part in contact with the conveyed product is the rotor. The lantern and seal casing is integrated into a single engineered composite material that is chemically resistant and easily retrofit-able in existing pumps. This design allows mounting of the pump in any orientation due to a lip seal and propylene glycol to lubricate and protect the components.
By using a seal mounted externally, the metallic components are never in contact with the conveyed product. This allows for the use of a stainless steel GA seal in even the harshest applications. This design allows for broad chemical compatibility, increased performance, and decreased maintenance, according to Mark Yingling, SEEPEX director of product and market development.
“Due to the external seal and engineered composite components, expensive inventories of wear parts, constructed of exotic materials for chemical compatibility, are no longer required,” says Yingling. “This is an advantage to our customers we are happy to offer.”
The MDR range features a QUADX joint design that performs as a constant velocity joint, reducing pulsation to levels only detectable by laboratory equipment. It is constructed from engineered composite material, durable to wear, chemically inert, resistant to heat and easy to assemble and maintain. This, combined with progressive cavity pump technology, provides laminar flow and a high degree of accuracy in chemical dosing applications. These key characteristics help reduce chemical usage, provide accurate dosing for line injection, and maintain required chemical levels without over or under dosing. 937-864-7150; www.seepex.com
