VA 22 31 11-2011 WATER SOFTENERS.pdf

1、02-11 22 31 11 - 1 SECTION 22 31 11 WATER SOFTENERS SPEC WRITER NOTE: Delete between /-/ if not applicable to project. Also delete any other item or paragraph not applicable in the section and renumber the paragraph. PART 1 GEN1ERAL 1.1 DESCRIPTION: Provide sodium cycle, cation exchange, pressure ty

2、pe, water softening equipment complete with piping services, electrical services, controls, accessories and auxiliary equipment. 1.2 RELATED WORK: A. Preparation and finish painting: Section 09 91 00, PAINTING. B. Section 13 05 41, SEISMIC RESTRAINT REQUIREMENTS FOR NON-STRUCTURAL COMPONENTS. C. Sec

3、tion 22 05 11, COMMON WORK RESULTS FOR PLUMBING. D. SECTION 22 08 00, COMMISSIONING OF PLUMBING SYSTEMS. Requirements for commissioning, systems readiness checklist, and training. 1.3 SUBMITTALS: A. Submit in accordance with Section 01 33 23, SHOP DRAWINGS, PRODUCT DATA, AND SAMPLES. B. Manufacturer

4、s Literature and Data: 1. Softener tank construction, coatings and linings. 2. Tank distribution system design. 3. Main operating valve. 4. Control system and flow meter. 5. Exchange resin. 6. Brine system. 7. Accessories including pressure gages and test kit. 8. Performance data including normal an

5、d maximum flow and pressure drop. Certification that required performance will be achieved. 9. Piping. C. Complete detailed layout, setting, arrangement, and installation drawings including electrical/pneumatic controls. Drawings shall also show all parts of the apparatus including relative position

6、s, dimensions, and sizes and general arrangement of connecting piping. D. Completed System Readiness Checklist provided by the Commissioning Agent and completed by the contractor, signed by a qualified technician and dated on the date of completion, in accordance with the requirements of Section 22

7、08 00, COMMISSIONING OF PLUMBING SYSTEMS. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-02-11 22 31 11 - 2 1.4 PROJECT CONDITIONS: A. Influent Water Analysis: Calcium, Ca: _ppm Magnesium, Mg: _ppm Total Hardness: _ppm Iron, Fe: _ppm Manganese, Mn:

8、_ppm Total Dissolved Solids: _ppm Turbidity, NTU _ Color: _ PH: _ Confirm the analysis with current samples and tests. B. Design Parameters: Normal System Flow and Pressure Drop:_L/s100 kPa (_gpm15 psi) Maximum System Flow and Pressure Drop:_L/s100 kPa (_gpm25 psi) Backwash/Rinse Flow: _L/s (_gpm) B

9、ackwash Volume: _liters nominal (_gallons nominal) Daily Water Usage: _liters per day (_gallons per day) Volume of soft water between regenerations: _liters (_gallons) min. Daily Hours of Water Demand: _ Operating Temperature Range: 4 50 degrees C (40 120 degrees F) Operating Pressure Range (System)

10、: _ - _kPa (_ - _psig) Electrical Requirements: Dedicated 120 v, 60 Hz, 1 phase receptacle. 1.5 APPLICABLE PUBLICATIONS: A. The publications listed below form a part of this specification to the extent referenced. The publications are referenced in the text by the basic designation only. B. Federal

11、Specifications (Fed. Spec.): A-A-694DSodium Chloride, Technical C. American Society of Mechanical Engineers (ASME): B16.1-1998 Cast Iron Pipe Flanges and Flanged Fittings B16.3 - 2006Malleable-Iron Threaded Fittings Classes 150 and 300 B40.100 - 2005 .Pressure Gages and Gage Attachments Boiler and P

12、ressure Vessel Code, Section VIII, Pressure Vessels, 2007 D. ASTM International (ASTM): A53/A53M - 07 Pipe, Steel, Black and Hot-Dipped, Zinc-Coated Welded and Seamless D2665-04ae2.Poly (Vinyl Chloride) (PVC) Plastic Drain, Waste, and Vent Piping and Fittings. Provided by IHSNot for ResaleNo reprodu

13、ction or networking permitted without license from IHS-,-,-02-11 22 31 11 - 3 E. American Water Works Association (AWWA): B300 - 10 Hypochlorites B301 - 10 Liquid Chlorine C651 - 05.Disinfecting Water Mains F. National Electrical Manufacturers Association (NEMA): ICS-6-1993(R2006Industrial Control a

14、nd Systems: Enclosures G. Department of Health and Human Services, Food and Drug Administration (FDA): CFR 21, Chapter 1, Part 173.25, Ion-Exchange Resins CFR 21, Chapter 1, Part 175.300, Resinous and Polymeric Coatings PART 2 - PRODUCTS SPEC WRITER NOTE: Make material requirements agree with applic

15、able requirements specified in the referenced Applicable Publications. Update and specify only that which applies to the project. 2.1 SOFTENING SYSTEM: A. Vertical, down flow, pressure type with automatic controls to operate on sodium cycle. Automatic-alternating duplex units. Designed for 690 kPa (

16、100 psi) working pressure. All materials exposed to water shall be considered as generally safe by the Food and Drug Administration (FDA). B. Performance Requirements: 1. Continuous flow of zero hardness soft water (ASTM soap test method) with influent water conditions and flows listed in Part 1, wi

17、th only one of the duplex units in service. 2. Exchanger material shall not wash out of apparatus during any softening run regardless of rate of flow. 3. Turbidity and color of treated water shall not increase above that of raw water. 4. Dirty or turbid water shall not occur during any softening run

18、, regardless of changes in demand rate. 5. Strainer system, gravel bed, and exchange material shall not become fouled, either by turbidity in the raw water, or by dirt, rust or scale from pipe to the extent to render backwash ineffective. 6. Regeneration shall be accomplished within a period of 75 m

19、inutes and occur not more than once per day. Regeneration period shall be that part of cycle of operation from the time unit has delivered its softening capacity until it is ready to be delivering soft water again, including all backwashing, brining and brine washout, complete. Amount of salt necess

20、ary to completely recondition unit Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-02-11 22 31 11 - 4 after a capacity run shall not exceed 240 kg per cubic meter (15 pounds per cubic foot)of existing material. SPEC WRITER NOTE: Choose steel or FRP t

21、ank construction. Steel with ASME construction is recommended for durability and quality of construction and resistance to shock loads such as water hammer or impacts. ASME construction may be required in certain jurisdictions. FRP is subject to impact failure, cannot withstand a vacuum and is not s

22、uitable for seismic areas. C. Softener Tanks Steel: Butt-welded industrial grade steel. Test hydrostatically at 1.5 times the design pressure and provide certification. / Conform to ASME Boiler and Pressure Vessel Code, Section VIII. Provide stamp on tank and written certification. / Sidewall height

23、 shall be adequate to allow 50 percent of the mineral bed depth for expansion. Tanks shall have openings for mineral filling and removal. Provide steel supports to hold tanks in operating position above floor /and designed to resist seismic loading requirements for Zone 4, UBC Importance Factor 1.0/

24、. Exterior shall be degreased, cleaned, and coated with manufacturers standard prime and finish coatings. Interior shall have near-white sandblast and lined with phenolic epoxy, 0.20 0.25 mm (8 - 10 mils) thick. Interior coating shall be chemically inert, non-toxic, odorless and meet the requirement

25、s of CFR 21, Chapter 1, 175.300. D. Softener Tanks Fiberglass Reinforced Plastic (FRP): Polyester reinforced by a continuous roving glass filament overwrap. Hydrostatically test at design pressure and provide certification. Support on a molded structural base. Tanks shall have flanged openings for m

26、ineral filling and removal. Provide vacuum breaker. E. Distribution System: Soft water collector and backwash water distributor shall be non-clogging, single point and hub radial laterals, designed to not cause channeling in the bed, PVC, Schedule 80. The distributor system shall be fully covered by

27、 one layer of quartz under-bedding with no debris or fines. F. Exchange Material: Solid virgin high capacity styrene base resinous material. Material shall be stable over the entire pH range with good resistance to bead fracture from attrition or osmotic shock. Particle size 20 50 mesh and contain n

28、o agglomerates, shells, plates or other shapes that might interfere with the functioning of the softener. Exchange capacity as CaCO3 shall be considered to be 840 grains per cubic meter (23.8 grains per cubic foot) at 240 kg per cubic meter (15 pounds per cubic foot) salt dosage. Resin shall not req

29、uire dosing or Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-02-11 22 31 11 - 5 addition of any chemical, mixture, or solution to the water requiring treatment, or the water used for backwashing, other than NaCl for regeneration. Resin shall be FDA

30、 compliant under CFR 21, Chapter 1, 173.25. G. Brine Measuring Tank with Cover: Rotationally molded high density polyethylene. Tank sized to provide a minimum of four regenerations per load of salt at a full salting. Tank shall include elevated salt plate and a chamber to house the brine valve assem

31、bly. H. Brine System Controls: Automatic valve shall open to admit brine to softener and close to prevent air admission to the softener. During refill, the valve shall regulate flow of soft water to the brine tank. Provide float-operated safety valve to prevent brine tank overfill. I. System Control

32、s: 1. The controller shall be completely automatic and shall sequence all steps of regeneration and return the softener to a service or stand-by mode and alternate the duplex units. Selectable time or flow meter initiated regeneration. The initiating time or volume set points shall automatically res

33、et upon initiation of the regeneration sequence. Controller shall permit manual initiation of regeneration. 2. Computer-based field-programmable controller with selectable flow meter based and time clock based operating cycles. The controller will utilize alphanumeric, self-prompting programming for

34、 simple start-up. EEPROM memory shall store program data eliminating need for battery back up on configuration input after power loss. Self-diagnostic and capable of emitting an audible error signal and displaying error-specific messages. Lockout function to prevent unauthorized access to the progra

35、m data. Sealed keypad with capability of all programming functions. Fluorescent alphanumeric display on face of controller. Enclose controls in NEMA ICS-6; Type 4X enclosure mounted approximately 1.5 meters (5 feet) above the floor. 3. Operating conditions shall be continuously monitored and display

36、 shall show time of day, volume remaining before next regeneration, number of regenerations in last 14 days, number of days since last regeneration, instantaneous flow rate, resettable totalized flow since the last regeneration, time of next regeneration, and identify the cycle that is in progress.

37、4. Flow shall be regulated to prevent resin loss, operate between 200 and 690 kPa (30 and 100 psi) supply pressure, and prevent noise and Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-02-11 22 31 11 - 6 hydraulic shock. Control shall permit only on

38、e unit to regenerate at a time. 5. Flow meter shall have turndown range of 60/1, minimum accuracy of +/-1% of maximum range, repeatability of +/-0.5% of full range. Install with manufacturers recommended straight pipe before and after the meter. 6. Main operating valve shall be a fully automatic mul

39、tiport diaphragm type or valve nest constructed of cast iron or corrosion resistant alloy material with hard-coat anodization and final coat of flouroplate polymer. Coating shall resist 1000 hour/5% salt spray test without sign of corrosion. Valves shall be slow opening and closing, free of water ha

40、mmer; diaphragm assembly shall be fully guided. All valve parts accessible for service. The main operating valve shall include a valve mounted automatic self adjusting brine injector to draw brine and control rinse at a constant rate regardless of water pressure in the range of 200 to 690 kPa (30 to

41、 100 psi). Valve shall have soft water sampling cock and indicator to show system status. J. Sampling Cocks: Provide for hard and soft water. K. Sodium Chloride: Fed. Spec. A-A-694D. Provide sufficient quantity for ten regenerations. 2.2 EXTERNAL SOFTENER PIPING: A. Pipe: ASTM A53, galvanized, Sched

42、ule 40. B. Fittings: Malleable iron, ASME B16.3, or coated cast iron, ASME B16.1, class 125. C. Flanges: ASME B16.1, Class 125. D. Threaded Joints: Shall be made with ends reamed out. Apply bituminous base lubricant or fluorocarbon resin tape to male threads only. 2.3 BRINE PIPING: Polyvinyl chlorid

43、e (PVC), ASTM D2665, Schedule 80 with solvent welded joints. 2.4 VALVES Ball: Carbon steel body, stainless steel trim, reinforced Teflon seat and seal, full port, threaded ends. 2.5 PRESSURE GAGES ASME B40.100, Grade A, 1% accuracy, 110 mm (4-1/2 inches) diameter, all metal case, bottom connected. W

44、hite dials, black hands, graduated from 0 to 700 kPa (0 to 100 psi) and identity labeled. Provide gages with gage cocks at softener hard water inlet and soft water outlet to show pressure drop thru softener. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IH

45、S-,-,-02-11 22 31 11 - 7 SPEC WRITER NOTE: Use backflow preventer, only for softener serving boilers. 2.6 BACKFLOW PREVENTER: Provide on suction side of water softener serving boilers. Parts shall be made of corrosion-resistant materials and shall be of heavy duty construction, 850 kPa (125 psi) cla

46、ss minimum. Units shall operate automatically on line pressure without any manual control or assistance. Failure of any part vital to prevention of backflow shall be indicated by a continuous discharge for relief valve opening. Moving parts shall be easily removed and replaced without disconnecting

47、backflow preventer, shall operate on “reduced pressure“ principle and incorporate a zone where pressure is always less than supply pressure. Pressure differentials shall be maintained by two spring-load vertical check valves and one spring-load, diaphragm-actuated, differential pressure relief valve

48、. SPEC WRITER NOTE: Brine Reuse System shall be used only for softeners 1200 mm (48 inches) in diameter and over. 2.7 BRINE REUSE SYSTEM: Automatic valving supplied to enable recovery of 25% of brine. 2.8 WATER TESTING EQUIPMENT: A. Furnish water testing equipment in a portable cabinet specially made for the installed equipment. B. Equipment shall permit the conducting of Boutron & Boudet standard soap test, or test as recommended by manufacturer of equipment. C. Include in the testing equipment kit the following: 1. One test bottle suitable for taking and shaki