HMH Horizontal Multistage Splitcase

The HMH multistage splitcase pumps are used in a variety of commercial & industrial applications where extremely high temperature and extremely high pressure are present. HMH pumps are industry leading from a feature & benefits standpoint and are specifically designed for the boiler feed markets. This heavy wall, radial, enclosed, investment cast 304 stainless steel impeller design provides a very broad operating range. These four and six-stage split case pumps also feature opposed, hydraulically balanced rotor designs eliminating the need for expensive balancing drums. These heavy duty multistage split case pumps feature double row inboard and duplex angular contact outboard bearings standard. Each bearing housing has a 360º, circumferential cooling jacket standard to uniformly cool the entire outer race of each bearing. Exclusive tongue & groove case wear rings, stage pieces and throat bushings are also standard. Ring oiled bearing lubrication is also standard as operating temperatures of the HMH product line can exceed 500ºF. Each model features 600# cast dimensional flanges and 420 stainless steel shafting. These industry exclusive features makes this product adaptable for the building trades and HVAC applications.

Flow & Pressure Characteristics

Flows To: 850 GPM (193 m³/hr)
Heads To: 2,100 Feet (640 m)
Temperatures To: 500ºF (270ºC)
Speed Ranges: 3000 RPM To 3600 RPM

Size Range

1.5×2.5-8 (38/20) – 4×5-10 (100/25)

Features & Benefits

  • Cast iron casing/investment cast 304 stainless steel impellers
  • Standard ring oil lubrication with 360º circumferential cooling jackets
  • Modular, removable bearing housings
  • Standard bearing isolators
  • Fully removable rotor assembly
  • Hydraulically opposed impeller orientation
  • Multi-vane, enclosed, high efficiency impeller with broad band efficiency
  • Investment cast 304 stainless steel, tongue & groove stage pieces
  • Bronze, impeller wear rings standard (HMM 6 has front & rear impeller wear rings standard)
  • Bronze, tongue & groove throat bushings standard
  • Bronze, tongue & groove fit, case wear rings offer superior pressure boundary protection
  • 600# suction/600# discharge flange drilled & tapped for easy connection to system piping
  • Drilled & tapped suction & discharge flanges for easy connection to system piping
  • Suction & discharge gauge connections standard
  • Turned, ground and polished 420 stainless steel shaft standard
  • Heavy duty, 304 stainless steel shaft sleeves with separate shaft sleeve nuts
  • Packing standard with optional component and/or cartridge mechanical seals available
  • Double row inboard and duplex angular contact outboard bearing
  • 50,000+ hour minimum L10 bearing life standard

Available Metallurgies

  • Cast iron, ductile iron, 304 stainless steel fitted, 316 stainless steel fitted


  • Building Trades
  • Chemical Processing
  • Food & Beverage
  • General Industry
  • Marine & Offshore
  • Mining & Aggregate
  • Power Generation
  • Oil & Gas
  • Pharmaceutical
  • Pulp & Paper
  • Water Resources

Why Superior Pump and Motor?

  • 20+ Years of Experience
  • Great Response Time
  • Available 24/7
  • Certified, Trained, and Experienced Team
  • Only Company in NYC to Offer Same Day Pumps
  • Great Customer Service Beginning to End

Consult With Us

Call us at (631) 212-1613 or fill our form.
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