APT14 automatic pump-trap
APT14 is a Spirax Sarco automatic pump-trap that drains continuously when pressure is available and switches to pressure-powered pumping when backpressure or vacuum stop ordinary trap discharge.
Condensate and heat recovery systems > Mechanical pumps
MFP14 condensate pump
MFP14 is a Spirax Sarco automatic condensate pump with a ductile iron body that uses steam or compressed air to lift condensate and other liquids where ordinary trap drainage is limited by backpressure, vacuum or low differential pressure.
Steam- or compressed-air-powered automatic condensate pumpSuitable for lifting condensate from vacuum equipment, pressurised plant and low-level return pointsCan be paired with ball float steam traps on temperature-controlled heat exchangersCurrent selector keeps verified MFP14 complete-unit flanged sizes only
Quick facts
ModelMFP14
Product typeAutomatic condensate pump
Body materialDuctile iron
Documented sizesDN25, DN40, DN50, DN80 x DN50
ConnectionsFlanged PN16 in selector / threaded BSP also documented
Pressure boundaryPN16 / motive inlet up to 13.8 bar g
Minimum inlet head0.15 m minimum, 0.3 m recommended
Where MFP14 fits
MFP14 condensate pump is the model-specific route for users already looking
for MFP14, a pressure powered condensate pump or a non-electric way to lift
hot condensate. It sits inside the wider
mechanical condensate pumps
family but narrows the selection down to one documented pump body and the
currently selectable complete-unit sizes.
Documented MFP14 product boundary
The current technical and installation material confirms MFP14 as an automatic pump powered by steam or compressed air for lifting condensate and other liquids. In suitable duties it can discharge directly from vacuum equipment or pressurised plant, and when paired with ball float steam traps it is intended to remove condensate from temperature-controlled heat exchangers, including vacuum conditions.
The documented range also includes MFP14S and MFP14SS, but this page keeps
the selector focused on standard MFP14 complete-unit options only.
MFP14is the ductile iron versionMFP14Sis the cast steel versionMFP14SSis the stainless steel version- documented connection coverage includes
1",1 1/2",2"and3" x 2"threaded BSP routes, plusDN25,DN40,DN50andDN80 x DN50flanged routes - the MFP14 pressure boundary is
PN16, with motive gas inlet pressure up to13.8 bar g
Selection and installation points
Before final specification, confirm motive pressure, total backpressure, actual condensate load and installation height. The same documentation states that total lift plus backpressure must stay below the available motive inlet pressure.
- minimum inlet head is
0.15 m, with0.3 mrecommended - pumped volume per cycle is
7 litresonDN25 / DN40,12.8 litresonDN50, and19.3 litresonDN80 x DN50 - flash steam should be vented or condensed before condensate enters the pump
- current ordering guidance states that flanges and check valves are specified separately
Related routes
- Return to mechanical condensate pumps to compare MFP14 with wider pressure powered pumping options.
- Compare electrical condensate pumps when the project needs a conventional motor-driven pumped return.
- Review practical methods of preventing stall when the application starts from exchanger stall rather than from the MFP14 model name.
Related products
Continue the MFP14 selection path
MFP14 selection usually sits between hot condensate lifting, low differential pressure drainage and wider condensate recovery decisions.
Compare the wider mechanical pumping range
Return to the mechanical condensate pump family to compare MFP14 with pump traps, pressure powered pumps and wider non-electric condensate recovery routes.
Confirm where MFP14 fits
Review stall guidance when the application starts from a temperature-controlled heat exchanger, backpressure or vacuum drainage problem rather than from a model number.
Check the electrical pumping route
Compare electrical condensate pumps when the project is better suited to a conventional receiver-and-motor arrangement.