| 摘要 |
An in-line chemical feed pump for a foam dispenser system comprising an inlet conduit for receiving chemical fluid, a pump head in chemical fluid communication with said inlet conduit, an outlet conduit in chemical fluid communication with said pump head, a driver, a pump drive transmission system positioned in drive transmission communication between the driver and pump head. The pump drive transmission system includes a magnetic coupling with first and second magnetic coupling members placed to opposite sides of an intermediate protective shroud, and wherein said shroud has a coupling reception cavity which receives one of said first and second magnetic coupling members. The shroud is preferably in the form of a cylindrical side wall defining said coupling reception cavity and said first magnetic coupling member includes an annular magnetic coupling ring extending about said cylindrical side wall, and said second coupling member has a magnetic coupler positioned within said shroud and magnetically coupled with the annular magnetic coupling ring. The pump is also preferably annular magnetic coupling ring has multiple poles. The pump feeds a heated chemical hose with a feed through unit attached at the dispenser end and the free end positioned closer to the pump and/or source. Heater units are also preferably also provided in the heater unit to supplement the chemical hose heater. |
