• System overload protection - the second pump is activated if the rate of condensate return exceeds the limits of the first pump Extra long service life - each of the two pumps is activated automatically on alternating pumping cycles so the work load is evenly distributed between the two pumps Back-up system protection - a second pump is automatically actuated if the first one fails to start, maintenance or repairs can be made on either pump without shutting down the other one or interrupting system operation They are used where an unusually heavy amount of condensate must be returned or where it is desirable to have a stand-by pump Equipped with a float operated, automatic mechanical alternator, they provide several benefits

Spirax Sarco G Series condensate and boiler feed pumps are packaged units completely assembled, wired and tested at the factory. They are used in low pressure steam heating systems to collect and quickly return condensate to the boiler or boiler feed unit. Pumping action is controlled by an integral float switch on simplex (one pump) units or mechanical alternator on duplex (two pump) units. Unlike boiler feed units which are controlled by a boiler mounted control and equipped with a makeup valve mechanism, condensate pumps usually do not directly supply boiler makeup water.