Permutit® Dual Velocity Strainers

In addition to retaining ion exchange media, Permutit® dual velocity strainers ensure uniform collection of demineralized water with low head loss during the down flow service cycle. During backwash and regeneration (upflow operation), these strainers provide a high velocity flow for positive flushing, separation of mixed resins and optimum regenerant distribution and contact. Regeneration time is reduced and service runs are extended up to 25%. The strainers are arranged in a regular pattern on the bottom of the vessel. During backwash, 16 jet streams fan out in a 360-degree pattern from the base of each strainer. The high velocity jets flush all areas of the bottom of the vessel and leave no resin undisturbed. Backwash and resin separation is complete. Similarly, in regeneration, regenerant distribution and contact is complete.

Permutit® dual velocity strainers can be used in double dish underdrain systems, mixed bed deionizers, the regenerators of condensate demineralizing systems and counterflow regenerated ion exchange equipment.

We have a number of options to choose from:

• We offer a complete line of dual velocity strainers for existing systems
• We can optimize one of your water treatment units with our dual velocity strainers or can assist you in optimizing your entire water treatment system with our comprehensive System Optimization Program.  Please click here for information
• If part or all of your water treatment system needs to be mechanically upgraded, please click here for information on our Mechanical Upgrade Program

The strainer assembly, including fittings, is durably constructed of stainless steel and the float valve is high-density polyethylene for long-term, dependable operation.   Some of the other benefits of Permutit Dual Velocity Strainers:

• Short regeneration times
• Extended service runs
• Effective flushing of resins
• Efficient separation of mixed resins
• No dead spots between strainers
• Optimum regenerant and resin contact
• Low head loss in service
• Uniform collection of demineralized water
• Highly efficient operation at low cost

Dual Velocity Strainer Data Sheet (pdf)
Dual Velocity Strainer Drawing (pdf)