English to German Tech/Engineering pumps

Plan 23 is the plan of choice for all hot water services, particularly boiler feed water, and many hydrocarbon services. This plan is the standard selection for hot water 80 `C (180 °F) and above and boiler feed water. Hot water has very low lubricity above 80 °C (180 °F) resulting in high seal face wear. This plan is also desirable in many hydrocarbon and chemical services where it is necessary to cool the fluid to establish the required margin between fluid vapour pressure (at the seal chamber temperature) and seal chamber pressure. In a Plan 23, the cooler only removes seal face-generated heat plus heat soak from the process. This duty is usually much less than that in a Plan 21 or Plan 22.