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Series High Capacity NXT3000 System
The gas feed system shall be a vacuum-operated, solution feed type with a feed range _ to _ PPD of _ gas. It shall be of the sonic flow design.
The vacuum regulator shall be suitable for wall mounting and be provided with an integrally mounted manifold trap with built-in electric heater with ten foot cord. Power requirement shall be 120 Vac or 241 Vac, 50/60 Hz. The manifold shall have a 5 square inch, removable filter cartridge having a 90 micron pore size.
A positive tight shut-off valve with Hastelloy®C body shall be provided within the vacuum regulator to isolate gas under pressure from the control system should there be a loss of vacuum. A spring-loaded pressure relief valve shall be provided to prevent the build-up of pressure within the gas control system. An excess vacuum shut-off valve shall be provided as an integral part of the vacuum regulator to automatically isolate the regulator from the meter assembly and ejector on loss of gas supply pressure. Provisions for automatic changeover shall be incorporated within the vacuum regulator without the need for an external valve. An indicator shall provide visual indication when the chlorine gas supply is exhausted or interrupted.
A meter assembly having a 20:1 range shall be provided to indicate the gas feed rate. The meter shall be calibrated for gas being fed and shall be directed reading in both English and metric units and the meter scale shall be 10 inches (25.4 cm). It shall be suitable for mounting on the wall. It shall be provided with a manual rate valve for manual control. When the system is automatically controlled no manual valve is provided. When required for automatic operation a ChloromaticTM control valve shall be provided (reference bulletin 100.0310 for equipment description).
An ejector shall be furnished with the system. The ejector nozzle and throat shall be sized for the application and have a check valve and emergency drain valve to prevent water or solution from flooding the chlorinator. The ejector shall be designed for the following conditions:
Water supply pressure: _____________psig
Maximum water flow: _______________gpm
Maximum back pressure: ____________psig
The vacuum regulator, meter assembly, rate control valve (manual or automatic), and ejector assembly shall be manufactured from materials resistant to corrosion from the chemicals being fed. All components shall be manufactured in a facility certified to meet the requirements of IS09001 International Standards.
The following accessories shall be supplied: Insect screen, bottle for test solution, four spare lead gaskets, universal wrench, thread lubricant, and instruction manual and parts lists.
The gas feed shall be DE NORA WATER TECHNOLOGIES, INC. Series High Capacity NXT3000, or approval equal.
Design improvements may be made without notice.
De Nora Water Technologies
3000 Advance Lane Colmar, PA 18915
ph +1 215 997 4000 • fax +1 215 997 4062
®Registered Trademark. © 2015. All Rights Reserved.
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