PMPLS Pressure Motive Pump

Brand: Watson McDaniel

The PMPLS model Carbon Steel non-electric pressure motive pump is a lower profile than the standard PMPF model. It is sometimes required when draining condensate from process equipment that is positioned close to the ground, which limits the filling head of the pump. 

This stand-alone pump is capable of operating with a maximum motive pressure of psig: 150 (kPa: 1,034, bar: 10.34) provided by steam, air or other gas supply. These pumps receive the ASME "UM" code stamp.
  • Equipped with our Patented "Snap-Assure" Mechanism which extends the useful life of the pump
  • Mechanism incorporates heat-treated stainless steel wear items
  • All stainless steel internals for ultimate corrosion resistance
  • Dual compression springs made from Inconel®-X-750 for high-temperature corrosive service
  • Operates using steam, air, nitrogen or other pressurized gases as the motive force
  • Non-Electric – can be used in remote locations or NEMA 4, 7, 9 and hazardous areas


Cover Material

  • Carbon Steel

Enclosure, Body Material

  • Carbon Steel

Environmental Protection

  • IP66
  • NEMA 4
  • NEMA 7
  • NEMA 9

Gasket Material

  • Cover Gasket: Grafoil

Materials of Construction

  • Check Valves, Other Internal Components: Stainless Steel
  • Inlet & Vent Valve: Hardened Stainless Steel 40 Rc
  • Mechanism Yoke, Ball Float: 304 Stainless Steel

NPT Connection

  • 1” NPT Female
  • 1-1/2” NPT Female

Nut & Bolt Material

  • Cover Bolts: Steel

Operating Pressure

  • psig: 150 (kPa: 1,034, bar: 10.34) - Max.

Operating Temperature

  • 185.5° C (366° F) - Max.

Pressure Range

  • Allowable Pressure - psig: 0 to 150 (kPa: 0 to 1,034, bar: 0 to 10.34)

Pressure Type

  • Gauge

Spring Material

  • Inconel X-750

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