VN 900-3000 - F Series Softener Specifications

VN 900 to 3000 – 4F and – 6F Specifications Mineral Tank (Standard Non Code Vessels). The non-code vessel shall be A36 carbon steel or better rated at 100 psi working pressure designed to a factor of safety of 3.0. Mineral Tank (Optional Code Vessels). ASME code stamped tanks shall be available. Tank shall be clearly specified as code or non-code with a specified working pressure. Tanks “built to ASME code but not stamped” shall not be acceptable as ASME code.  An ASME U1 form shall be provided with each ASME code tank. Coating and lining. Tanks shall be prepared for internal and external coating with a SPCC 11 near white sand blast. Internal and external coating shall be two 3 - 4 mill coats of white Series 20 Tnemic Epoxy. Paint shall be applied according to manufacturer’s recommendations. Internals. The bottom distributor shall be hub and lateral design with SCH 80 PVC hub and SCH 40 PVC slotted laterals. The slots shall be .012" - .016" wide to retain mineral and the total slot area shall be equal to or larger than the unit pipe size.  A four point SCH 80 PVC upper distributor with an opening equal to or larger than the unit pipe size shall be installed in the mineral tank. Face Piping. For models with a –4F or –6F designation the inlet and outlet connection shall be 4” or 6” flanges and the pipe shall be schedule 40 galvanized grooved fittings. Tanks shall have double drilled double tapped pad flanges on the side shell for inlet and outlet. Media. The resin shall be sodium form polystyrene 8% divinyl benzene cross linked resin with clear spherical beads. Resin beads shall be 16-50 US Standard Mesh with a particle size range of 0.3 to 1.2 mm. The resin shall be clean and packaged in sealed plastic bags weighing 55 lbs or less. Underbedding shall be #20 graded washed flint gravel sieved between 1/8” and 1/16”. Valves. The valves shall be Water King DMB Series cast iron body valves with grooved connections.  The valve can be operated by air or water.  The diaphragm shall be preformed, nylon fabric reinforced natural rubber. Internal parts shall be stainless steel and brass.  Working pressure on the valve is 230 psi with maximum temperature of 175oF. Stager. Diaphragm valves shall be operated by a rotary pilot valve (stager) with multiple ports through which control fluid is directed, thereby operating the diaphragm valves installed in a process system.  Standard units shall use stagers constructed of durable, non-corroding, self-lubricating material for long, maintenance free life. The stager shall function by opening and closing its ports, singly or in combination, in a sequence that accomplishes the five cycles of softening. The stager shall use either water or air for the operating fluid. Process fluid, if pressurized, and not damaging to the internal parts of the stager or diaphragm valve, may be drawn from the main line to the inlet of the stager.  Otherwise, an independent source of control fluid is required.  The pressure of the control fluid must be equal to or greater than the line pressure of the system. The stager enclosure shall be a 10” x 8” x 6” NEMA 4 fiberglass control box which houses both the stager and the timer. Maximum pressure shall be 100 psi with a maximum temperature rating of 150oF. Ports are 1/8” NPT.  Power shall be either 120 VAC/60 Hz or 230 VAC/50 Hz. Flexible tubing (¼” O.D.) shall connect stager ports to diaphragm valves. Brine System. The brine system shall be of the Accumaticä high grid plate design.  The brine tank shall be rotationally molded HDPE or fiberglass, including a cover. The system shall include a SCH 80 PVC float operated brine valve to control refill shut-off and refill flow rate.  Brine volume is to be repeatedly accurate within 10% and not dependent on salt bed void space for brine volume. Brine draw is to volumetrically controlled, not timed. Brine Distributor. The vessel shall be equipped with a header lateral brine distributor system allowing brine to enter above the bed rather than through the upper distributor. External Ejectors. Brine shall be drawn directly into brine header using an EE series external ejector. This venturi type device shall be SCH 80 PVC with 1” or 1 ½” FNPT connections. The venturi shall be chemically bonded to the housing. The venturi shall be precision machined. Maximum temperature shall be 140°F. The external injector shall provide both brine flow and brine dilution. Operating Conditions. Maximum temperature shall be 100°F. Pressure shall be 25 to 100 psi. Simplex. Simplex systems shall consist of one mineral tank with attached valve nest and one brine tank. Simplex systems shall be controlled using the ERCt 99-day electronic timer and an MPV1 stager both housed in a single NEMA 4 enclosure. Regeneration shall be initiated at preset times of the day.  Manual regeneration shall be available at the stager. Twin. Twin systems shall consist of two mineral tanks with attached valve nest and one brine tank with a brine director. Twin systems shall be controlled using the ERCt 99-day electronic timer and two MPV1 stagers all housed in a single NEMA 4 enclosure. Regeneration shall be initiated at preset times of the day. Softeners run in parallel and are out of service only during regeneration. Simultaneous regeneration is prevented by setting different regeneration times for each unit. Manual regeneration shall be available at the stager. Twin Alternating Demand Initiation.  Twin alternating systems shall consist of two mineral tanks with attached valve nest and one brine tank with a brine director. Twin alternating systems shall be controlled using the ERCd electronic controller and an MPV3 stager housed in a single NEMA 4 enclosure. Regeneration shall be initiated based on the total quantity of water treated by the softener. One softener is in service and one in regeneration or standby. Manual regeneration shall be available at the stager. Twin alternating systems provide a continuous flow of softened water with no bypassing of unsoftened water during regeneration. Multiple Tank Demand Initiation.  Regeneration shall be initiated based on the total quantity of water treated by the softener. For pipe sizes 3” and below, the VN Series uses PW series flow meters with the ERCd   controller, and MPV 1 or MPV3 stager. For 4” and 6” and larger piping the VN series uses the PW 400S and 600S saddle mounted flow meters with the WK520-84 controller, stagers and ARC cycle timers. Twin alternating systems provide a continuous flow of softened water with no bypassing of unsoftened water during regeneration. Other items. A standard soft water soap test kit shall be provided. A complete set of instructions, including installation, loading, start-up, adjustments, servicing, and a parts list shall be provided with the equipment.  Qualifications. A company that has continuously manufactured water softeners for at least 10 years shall construct the equipment. Pressure gauge and test tap kit. A kit containing two liquid filled, stainless steel pressure gauges with 2 ½” Ø face, two brass ball valve sample taps with hose barb connections and associated brass connection fittings shall be provided for mounting in the 1/4" FNPT predrilled and tapped ports in the inlet and outlet diaphragm valves.