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Flowserve-IDP-API Process Pumps - HWMA

API Process Pumps - HWMA


The HWMA is a single or two stage, vertical in-line overhung pump with a separate bearing bracket. With its small footprint, this low-flow, high-head process pump is a space-saving alternative to many overhung process pumps in upstream and downstream services.


  • General Industry
  • Chemicals
  • Water
  • Oil & Gas
  • Power

industry sectors

  • Pulp & Paper
  • Mining
  • Steel & Primary Metals
  • Other Industries
  • Basic (Organic & Inorganic)
  • Specialty (Fine & Consumer)
  • Biofuels
  • Water
  • Upstream Exploration & Production
  • Downstream Processing
  • Conventional Steam
  • Combined Cycle
  • Flowserve
  • Hydraulic Institute
  • ISO 13709 / API 610
  • ISO 21049 / API 682 seal chamber and seal flush plans
Operating Parameters
  • Flows to 45 m3/h (200 gpm)
  • Heads to 220 m (725 ft) for single stage design
  • Heads to 440 m (1455 ft) for two stage design
  • Pressures to 60 bar (870 psi)
  • Temperatures -46°C (-51°F) to 260°C (500°F)
Design Range

Size Range: 2 designs (single stage, double stage) 80 hydraulic designs (8 impeller diameter and 10 different vane hight combinations)

Features & Benefits
  • Single stage, radially vaned, vertical in-line overhung pump according to ISO 13709/API 610 OH3 design recommendations with separate bearing housing as well as OH4 rigidly coupled (WMA)
  • Replaceable single channel diffuser can be easily changed for future system requirements
  • Straight vaned, low NSS impeller
  • Proven OH3 bearing housing design, patented oil circulation with pump ring and flinger, shaft stiffness according to API requirements

single stage HWMA (OH3)

double stage HWMA (OH3)

single stage HWM (OH4)

double stage (OH4)



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