Deionized Waste Water Pump (WWP)

Environmental System Support Aboard the International Space Station (ISS) | Leading Supplier of Spacecraft Environmental Systems

P-086, 86-D-451

Features & Benefits

This ceramic spur gear pump was designed to allow variants to support three environmental systems on the ISS: oxygen generation (OGA system), water delivery (WPDP system), and waste water processing (WWP system).  The highly engineered solution provides the exceptional reliability and long operating life required of space-based equipment; service calls are problematic.  Designed with common parts and processes these pumps featured:

  • Zirconia pump gears
  • Stellite drive shafts
  • Ceramic side plates
  • 316 stainless steel housings
  • Silicon-carbide journal bearings
  • Complete traceability and documentation to support NASA program standards
  • Zero-G operation

This ECLSS NASA Fact sheet provides an overview of the system which is located on Node 3 of the ISS.

Performance Parameters

Part Number
86-D-451
Application Fluid
Grey Waste Water (WWP)
Drive Type
Mechanical
Pump Type
Gear
Circuits
Max Flow Max Pressure Operating Speed
Single-circuit 0.09 gpm 110 psi 2500 rpm
Flow (in3/minute)
330 (OGA & WPDP models), 20 (WWP model)
Pressure Rise (psid)
30 (OGA & WPDP models), 110 (WWP model)
Vibration & Shock
Typical Spacecraft Launch Loads

positive displacement gerotor pump For the International Space Station (ISS)

Deionized Water Pump, positive displacement gerotor pump