Porplate® Filter Septa
Purolator Poroplate® septa are application engineered and manufactured to optimize your F/D systems. They are tailored to the specific operating conditions and requirements of your systems. These septa will extend run times, maximize the use of ion exchange resins, increase Precoat uniformity, and improve backwash efficiency, with no measurable resin bleed-through. Poroplate® septa precoat uniformly, without the need for a cellulose precoat. By increasing the run time between backwashing, and decreasing the requirement for cellulose precoating, the radwaste volume is reduced. The result - an optimized F/D system.
Pleated Polypropylene Septa
Purolator-designed polypropylene pleated septa are used in either precoat or non-precoat applications. These septa are used primarily for iron removal with or without thin overlay precoats. Filtration ratings for pleated polypropylene tube bundle assemblies and septa are commonly from 2 microns to 20 microns. The pleated design is made to fit in top and bottom tubesheet vessels and as with other septa designs, is available in a complete tube bundle assembly to enhance installation and reduce exposure (for nuclear plants).
The exclusive mechanical and metallurgical engineering capabilities of the Purolator Power Generation Group involve applying the latest CAD solid modeling and drafting programs. These, and dedicated filter septa test equipment, are used to custom-design and manufacture septa, meeting the filtration and strength requirements of the nuclear power generation industry. The Purolator dedicated septa test equipment allows testing of full length septa, including visual examination of precoat and backwash performance under the actual operating parameters of your plant. These capabilities, coupled with Purolator's excellent QA/QC program and manufacturing capability, provide you with septa designed to optimize your system's performance. For either new installations or direct replacement retrofitting of Graver, DeLaval or Croll Reynolds septa, the Purolator Power Generation Group is your resource for flexible, application-matched filtration solutions.
Tube Bundle Assemblies
Septa are commonly provided in complete tube bundle assemblies. This enhances the installation and removal of septa from the filter demineralizer to reduce installation cost and associated soft labor charges. In nuclear plants, the associated savings as a result of reduced radiation exposure is dramatic. Standard designs are available for top and bottom tubesheet assemblies.
A key component of Poroplate® septa is a diffusion-bonded, stainless steel wire-cloth and perforated-plate laminate. Poroplate® septa are available in a variety of filtration ratings, all providing low differential pressures and high collapse strength. Poroplate® media are readily constructed in cylindrical tubes, or custom fabrications for Funda-type retrofits or resin traps. The high strength and corrosion resistance of Poroplate® septa provide for enhanced precoating, aggressive backwashing and extended service life.