Generic selectors
Exact matches only
Search in title
Search in content
Search in posts
Search in pages

Cochrane FILTEREX Condensate Polisher

The COCHRANE® FILTEREX Condensate Polisher is a co-current style ion exchange softener typically used for High Temperature applications. If can be configured as either Sodium or Amine Cycle.


Feed water enters the vessel and is evenly distributed
over a bed of high temperature strong acid cation resin
media. The water then flows down through the bed
where the resin continues to exchange ions of sodium
for calcium, magnesium and iron/copper oxides. The
water enters the distributor system at the bottom of the
vessel and is piped out of the vessel.

When pressure loss of the system exceeds a preset value, the unit must be taken off line and cleaned/regenerated. There are four distinct phases: backwash, salt brine addition, slow rinse and fast rinse. This process is designed to restore the resin bed to its original form and capacity. The total regeneration process takes approximately 90 minutes after which the vessel is then switched back into normal operation.

After backwash the resin is regenerated with a concentrated salt solution. When regeneration begins saturated brine is diluted with feed water and introduced through the top distributor. Spent regenerant is collected from the bottom of the bed and discharged to waste. After regeneration the resin is rinsed prior to starting a new cycle.

ModelRating (gpm)InletTank ODTank SSResin Volume (ft3)Capacity (Kilograins)

Technical information

Included Components

  • 100-psig rated carbon steel with epoxy coating (up to 250oF, unlined 304 stainless vessel for higher temperatures) with top dome manway and side-shell hand hole accessways
  • 30-inches of industrial grade macroporous-type strong acid cation softening resin (Cochranex® CRV resin, highly crosslinked, >95% sphericity, 1.6 uniformity coefficient) with gravel subfill
  • Lug-style pneumatically actuated butterfly valves with stainless steel disc & stem, EPDM seat, steel body and two-way NEMA 4 UL certified 24V solenoid
  • Paddlewheel-style flowmeter with 316 stainless steel body (> 100 psig rated up to 300oF), stainless steel rotor and pin, UL certified
  • Schedule 10 304 stainless steel piping, eductor, upper flow distributor and underdrain collector (separate brine distributor on 60-inch polisher)
  • Feed and discharge pressure gauges (2.5” dial, stainless case, glycerin filled)
  • Manual stainless-steel vessel drain and vent ball valves
  • Self-supported face piping
  • Polyethylene or FRP (temperature based) tank-based brine saturator complete with gravel bed, underdrain lateral, automated fill valve and level switch controls

Options Available

  • Epoxy coated steel skid for multiple units
  • ASME code stamped vessels
  • Manually operated design
  • Brine centrifugal pump with titanium wetted parts
  • Substitution of flowmeter for magnetic type flowmeter
  • Differential pressure switch
  • Seismic zone rated
  • PLC based control panel with touchscreen and ethernet communication capability



• To remove hardness (scale forming calcium and magnesium ions) and replace with soluble sodium ions
• To remove iron/copper oxides and replace with soluble sodium ions
• Hardness and iron/ copper oxides in boiler condensate can easily damage plumbing, valves and downstream equipment
• Hardness and iron/copper oxides in boiler condensate are harmful to boilers and can cause scaling and thermal efficiency loss

Key benefits


• Provides effective removal of water hardness in boiler condensate
• Provides effective removal of iron/ copper oxides in boiler condensate
• Can be automatically regenerated based on manual, time or metered flow demand initiated
• Inlet/outlet pressure gauges
• Efficient internal designs provide a typical 10 PSI pressure drop across tank when clean
• Minimum energy and maintenance requirements• Stand alone tanks or modular skid mounted (pre-piped & pre-wired) options


Cochrane® FILTEREX Condensate Polisher Features

  • Industrial grade high-temperature ion exchange softener (Cochranex® CRV resin)
  • Removes dissolved hardness and suspended corrosion products from condensate up to 300oF.
  • Compact, high-flow design


  • Fully integrated system with vessel, media, piping and instrumentation pre-wired and pre-tested
  • Rated for continuous or intermittent duty
  • Automatically regenerated based on manual, time or metered flow demand
© 2023 newterra ltd. All rights reserved