Condensate Return Pumps Used (W4100 series - carbon steel receivers) for returning condensate from the facility back to the boiler room. In Condensate Return applications, the operation of the pump is controlled by a Float Switch located on the receiver tank. The pump turns on when the receiver tank is full and shuts off when emptied. Duplex units contain a Mechanical Alternator float switch to alternate operation between the two pumps.
SIMPLEX - Float Switch is used to activate the pump.
DUPLEX - Mechanical Alternator (used in place of the Float Switch found on Simplex units) is used to cycle operation between the 2 pumps.
• Fabricated steel receivers (W4100), Cast Iron (W4200),
Stainless Steel (W4300)
• Simplex and duplex packages
• Bronze-fitted centrifugal pumps
• Energy-efficient 3450 RPM motors
• Automatic venting of mechanical seal
• Ceramic pump seal with carbon face
• Heavy-duty float switch
• All steel and iron receivers over 24 gallons include
a threaded NPT overflow port
The float, which is connected to the switch assembly, rises when
condensate enters the receiver tank. When the float rises above
its set point, it energizes the motor on the pump. Once started,
the pump will continue to run until the water level drops below
the bottom position of the float switch.There it will de-energize
the motor to shut off the pump. This cycle repeats as condensate
begins to fill the receiver tank. On duplex systems the float switch
is replaced with a Mechanical Alternator-Switch connected to
a float. The Mechanical Alternator cycles use between the two
pumps, allowing only one pump to run at a time under normal
conditions. If the condensate reaches a high water level, both
pumps will be activated.
Selection / Sizing / Capacities • A Condensate Return Pump contains an automatic
float switch in the receiver tank to activate the pump
when the tank is filled and deactivate when empty.
• On Duplex units, the standard float switch is replaced
with a Mechanical Alternator float switch to alternate
operation between the two pumps. Must be ordered
separately. An Electric Alternator is also an option.
• The capacity of the condensate return pump in Gallons
Per Minute (GPM) is based on the amount of Effective
Direct Radiation (EDR) in sq ft. of heating surface in the
facility that the pump is expected to handle.
For Example: an EDR of 2000 sq. ft. can condense
up to 500 lbs/hr of steam which translates to 1.0 GPM
of condensate flow. Using a 3:1 safety factor would
require a 3.0 GPM Condensate Return pump. The
properly sized receiver tank that is adequate for that
pump capacity is shown in the model selection chart for
Condensate Return units. Larger receiver sizes are
always desireable in order to cool condensate.
• Select a discharge pressure for the pump to overcome
all system back pressures including frictional piping
losses. Pump discharge pressures of 20-50 PSI are
available. Selecting a pump with a significantly higher
discharge pressure than required can cause pump
to cavitate.
Please click on individual model to see dimension.
• Mechanical and Electrical Alternators
• Gauge Glass
• Thermometers
• Discharge Pressure Gauges
• Isolation valves
• Magnetic Starters with HOA Selector Switch
• 1750 RPM Motors
• Larger pumping capacities & higher discharge pressures
• Wide variety of control panels
• Oversized Receivers (45, 60 & 95 gallons)
• Stainless Steel Receivers
• High Temperature (250°F) Components
Installation and Maintenance Place on an elevated, level and substantial foundation in a
clean, dry and accessible area. Locate receiver tank inlet below
lowest point of the condensate return lines.
Pump(s) shall be of the centrifugal type with 2-piece closed
bronze impeller, cast iron housing and stainless steel motor shaft.
A flat perforated brass strainer shall be provided in the inlet of
the pump.