Heating Helper

CHAPTER 1 - STEAMSizing of Vacuum PumpVacuum condensate pumps are normally sized at 2 or 3 times the systemcondensing rate. This is the same procedure for sizing standardcondensing rate. The vacuum pump must also remove air from thereturn system. The system size, the inches of vacuum desired, andtightness of the system piping must be considered. The following chart.will help.1 210Air Removal RequirementSystem Vac / In. Hg. CFM / 1,000 EDR• up to 10,000 EDR (tight)0 - 10.5• over 10,000 EDR (tight)• all systems, someair in-leakage0 - 100 - 10.31.0Highest Temperature °F of CondensatePermissible with Vacuum PumpsVacuum Inches of Mercuryin Pump Receiver15121086421Highest Permissable Temperatureof Condensate °F17918719219620120520921033