Skip to main content
Flowserve - Flowserve - Horizontal - Multistage - DoubleCase - WXB - WXBB

Horizontal - Multistage - Double Case - WXB / WXBB

BRAND: Flowserve

The WXB is a multistage, diffuser-casing barrel pump with tandem impellers and a balance drum to carry axial thrust forces. It is designed for users who need the hydraulic range and performance of a ring section pump, but demand the design and maintenance attributes of a barrel pump. An extension of the well-proven WXB, the WXB-B is an API 610-style, multistage barrel pump which incorporates Barske style impellers to produce stable low-flow performance. It is a reliable, direct drive solution for low-flow, high-head applications.


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

industry sectors

  • Conventional Steam
  • Combined Cycle
  • Upstream Exploration & Production
  • Midstream Transportation
  • Downstream Processing
  • Basic
  • Specialty
  • Biofuels
  • Other Industries
  • Flowserve
  • Hydraulic Institute
  • ISO 13709 / API 610
  • ISO 21049 / API 682 seal chamber and seal flush plans
Operating Parameters


  • Flows to 300 m3/h (1320 gpm)
  • Head to 1200 m (3940 ft)
  • Pressure to 150 bar (2175 psi)
  • Temperature from -75°C (-103°F) to 425°C (797°F)


  • Flows from 4.5 m3/h (20 gpm) to 35 m3/h (154 gpm)
  • Heads to 1560 m (5116 ft)
  • Pressure to 200 bar (2900 psi)
  • Temperature from -46°C (-51°F) to 200°C (392°F)
Design Range

Size Ranges


  • 4 frame sizes
  • 12 hydraulics
  • Up to 14 stages


  • 3 sizes
  • 4 hydraulic designs per size
  • Up to 8 stages
Features & Benefits

Designed to meet the intent of API 610, latest edition the WXB pump is a BB5 category, double case horizontal, multistage, centerline mounted barrel pump.

The compact, space-saving design has a convenient cartridge-style construction to minimize maintenance down time. The WXB is field proven in oil refineries and petrochemical plants throughout the world. and first choice for most demanding applications - in all services where process conditions demand a barrel construction, process industry, refineries, chemical and petrochemical plants, liquefied gas stations, condensate service and boiler feed service.

A full range of sizes from 2” to 6” combined with a wide range of hydraulics, numbers of stages and all API material columns allows the WXB to be applied across the complete breadth of the market. An on-going research and development program guarantees an up-to-date product, constantly evolving to meet the latest standards API 682 / ISO 21049 mechanical seal chambers, ATEX, CE marking etc.

The WXBB pump is a horizontal, double case, diffuser collector, multistage, centerline mounted between bearing pump designed to meet API 610 latest edition requirements. The inner element is constructed as a two piece channel ring/diffuser stage and Barske impellers mounted in-line (tandem), utilizing a straight balance drum at the discharge side to balance residual thrust.

The hydraulics are specifically developed for low flow high head applications.


Flowserve Horizontal - Multistage - Double Case - WXB / WXBB

Worthington Horizontal - Multistage - Double Case - WXB / WXBB


Our global expertise and local service centers ensure that you stay up and running. Learn more about our services.

Learn More