DMX Between Bearings, Multistage, Axially Split Pump

DMX pump is a horizontal, multistage, axially split, near centerline-mounted pump. The the fully compliant API
610, latest edition is used for applications involving high-flow, high-pressure movement of water, crude oil, CO2 and other hydrocarbons.

The basic pump design, consisting of back-to-back mounted impellers operating in heavy-duty double volute casings,
inherently results in optimum axial thrust and radial thrust balance over the full operating range.
• First-stage impellers are available with single- or double-suction inlets depending on NPSH available for a given application.
• Inherent hydraulic balance allows both seal chambers to operate at pump suction

Application
• Pipeline
• Boiler feed
• Water injection
• CO2 injection
• Process charge
• Descaling
• Mine dewatering

Operating Parameters
• Flows to 2950 m3/h (13 000 gpm)
• Heads to 2130 m (7000 ft)
• Pressures to 275 bar (4000 psi)
• Temperatures to 205°C (400°F)
• Speeds to 8000 rpm
• Specific gravities down to 0.35

WDX Multistage Ring Section Pump

The WDX type pump is a horizontal, multistage, radial split case, vaned diffuser type centrifugal pump equipped with a special suction impeller for low NPSH. It can be used with motor, steam turbine and gasoline or diesel engine drives.

The WDX pumps are of modular construction with identical stages being stacked axially to achieve the desired pressure output. Four high strength external tie rods connecting the two end casings hold them together. A variety of optimal features and materials allow it to fit a wide range of applications such as boiler feed or reverse osmosis.
Various orientations for the radial suction and discharge nozzlesare allowed every 90°except towards the bottom.

They are available in the following configurations

WDXR

  • Horizontal
  • Radial suction
  • Drive end on discharge side – C W
  • Thrust bearing on drive side
  • Radial bearing on suction side
  • 2 shaft seals

WDXC

  • Horizontal
  • Radial suction
  • Drive end on suction side – CCW
  • Thrust bearing on suction side
  • Radial bearing on discharge side
  • 2 shaft seals

WDXE

  • Horizontal
  • End suction
  • Drive end on discharge side – C W
  • Thrust bearing on drive side
  • Sleeve bearing on suction side
  • 1 shaft sea

WDXS

  • Horizontal
  • Radial suction
  • Drive end on discharge side – CW
  • Thrust bearing on drive side
  • Sleeve bearing on suction side
  • 1 shaft seal

Operating Limits (depending on pump size, material column and temperature)

  • Capacity at 50 cycle up to  660 US gpm (160 m3/h)
  • Capacity at 60 cycle up to 800 US gpm (190 m3/h)
  • Suction pressure up to 365 psi (25 bar)
  • Discharge pressure up to 1090 psi (75 bar)
  • Pumping Temperature up to 410 oF (210 oC)
  • Maximum speed 3600 RPM

WXH Utility Grade Multistage, Ring Section Pump

The WXH multistage ring section pump is a heavy-duty, between bearing pump that is very well suited for combined cycle plants where severe cycling, cold start-up and thermal transient conditions are commonplace. It is frequently used in boiler feed and start-up boiler feed in conventional power stations as well. Its hydraulic coverage also gives it broad application in alternative power generation, including concentrated solar power and biomass plants.

In addition to power generation, the WXH can be effectively configured for high-pressure descaling service in steel mills as well as applications in the broader chemical processing industries.
Typical Applications
• Power generation
–– Combined cycle heat recovery steam generator
(HRSG) feedwater
–– Conventional boiler feed and start-up boiler feedwater
–– Alternative power generation boiler feedwater
• Steel mill descaling
• Chemical processing

Operating Parameters
• Flows to 900 m3/h (4000 gpm)
• Heads to 2650 m (8700 ft)
• Pressures to 310 bar (4500 psi)
• Temperatures to 250°C (480°F)
• Speeds to 5000 rpm