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HomeMy WebLinkAboutWater Report i T September 15, 2010 Mr. Stephen Maldonado Jr. City of College Station Water Services Department 1101 Texas Avenue College Station, TX 77842 Re: Domestic Water Report Proposed Hillel Student Center 800 George Bush Drive College Station, Texas Gessner Engineering Job No.: 10 -0407 Dear Mr. Maldonado: The peak water demand was calculated in accordance with the fixture count determination method. A total fixture unit count of 88 was determined for this building, and values are shown below in Table One. Fixture Number Load Total Factor Value Lavatory 12 2 24 Dishwasher 2 2 4 Water Fountain 2 2 4 Urinals 2 4 8 Water Closets, 6 8 48 Valve Operated Total 88 Table One: Fixture Units The peak water demand (based on 500 fixtures) for the domestic service line and meter is 125 gallons per minute, and the average Gessner water demand is 31 gallons per minute. The maximum continuous Engineering capacity of the 1.5" Sensus OMNI T water meter is 160 gallons per minute, well over the expected peak demand. The specification sheet 2501 Ashford Drive for the Sensus OMNI T water meter is attached. Suite 102 Please contact us if you have any questions or if we can be of further assistance. College Station, Texas 77840 P.O. Box 10763, 77842 Sincerely, GESSNER ENGINEERING, F -7451 � 979.680.8840 r" OFTES v , � y ; • ' ••• • • ''�{r fax 979.680.8841 ` V L a /\ :* l Melissa P. Thomas, P.E. * ' :* . MELISSA P. THOMAS 1I q' 98398 2204 S. Chappell Hill Street Kyle M. Zapalac, M.E., E.I.T. ftO.4: • •4 /cENs .r� i FS •.,....,,.� Brenham, Texas 77833 979.836.6855 4 - 0 . !d fax 979.836.6847 lo :dv OMNI- 210 -R2 ' w OMl\I T 2 OMNI _ CCRIPTION Model:The OMNI meter operation is based on advanced Floating Ball Technology (FBT) with an operating range of .75 GPM (.17m /hr) @ 95% min. !fx - to 200 GPM (45 m /hr) @ 100% +/- 1.5% registration t � ('� of actual throughput.The meter is also rated for • continuous flows up to 160 GPM (36 m /hr). s "" Conformance to Standards: The OMNIT meter meets and far exceeds the most recent revision of ANSI / '_`�•. t AVWVA Standard C701 class II standards. Each meter is performance tested to ensure compliance. All OMNI meters are NSF Approved to the latest standards. 1 - 1/2" OMNIT Performance:The patented measurement principles of the OMNIT meter assure enhanced accuracy ranges, an overall greater accuracy, and a longer service life - than any other comparable class meter produced.The ®sEnsusO. T meter has no restrictions as to sustained flow rates within its continuous operating range.The floating ball a TOTAL allows for flows up to its OsCnsus COO 004 measurement technology - 9Y p 0 GAL x" OsEnsusO - rated maximum capacity without affecting undue wear AMA 1vs 2- EST x or accuracy degradation. 00020 CCC GAL I vam ® GAL Construction:TheT 2 meter consists of two basic ii o,r assemblies; the maincase and the measuring chamber. Totalization Mode The measuring chamber assembly includes the "floating ball" impeller with a coated titanium shaft, AMR /AMI Mode ResettableTest Mode hybrid axial bearings, integral flow straightener and an all electronic programmable register with protective bonnet.The maincase is made from industry proven Strainer:The OMNIT with the "V" shaped integral Ductile Iron with an approved NSF epoxy coating. strainer using a stainless steel screen along with Maincase features are; easily removable measuring Floating Ball Technology (FBT) create a design that chamber, unique chamber seal to the maincase using gives far improved accuracy even in those once a high pressure o -ring, testing port and a convenient thought questionable settings. A removable strainer integral strainer. cover permits easy access to the screen for routine OMNI Electronic Register: TheT electronic register maintenance. Optional drain ports, located at the back consist of a hermetically sealed register with an lower corners of the strainer body, allow for easy electronic pickup containing no mechanical gearing. discharging of debris without the need to remove the The large character LCD displays AMR,Totalization and cover. a ResettableTestTotalizer. OMNI register features; AMR Maintenance:The OMNIT meter is designed for easy resolution units that are fully programmable, Pulse maintenance. Should any maintenance be required, output frequency that are fully programmable, Integral the measuring chamber and / or strainer cover can be customer data logging capability, Integral resettable removed independently. Parts and or a replacement accuracy testing feature compatible with AR -5000 measuring chamber may be utilized in the event repairs Testing Assistant Program, Large, easy -to -read LCD also are needed. Replacement and Measuring Chamber displays both forward and reverse flow directions and Exchange are available under the Sensus MMP Program all with a 10 year battery life guarantee. for theT meters and this program may also be utilized Magnetic Drive: Meter registration is achieved by for retrofitting to competitive meters to achieve utilizing a fully magnetic pickup system.This is increased accuracy and extended service life. accomplished by the magnetic actions of the embedded AMR / AMI Systems: Meters and encoders are rotor magnets and the ultra sensitive register pickup compatible with current Sensus AMR /AMI systems. probe.The only moving component in water is the "floating ball" impeller. Guarantee: Sensus OMNIT Meters are backed by Measuring Element:The revolutionary thermoplastic, "The Sensus Guarantee:' Ask your Sensus representative for details or see Bulletin G -500. hydro dynamically balanced impeller floats between the bearings.The Floating BaIlTechnology (FBT) allows the measuring element to operate virtually without friction or wear, thus creating the extended upper and lower flow ranges capable on only the OMNIT meter. Page 1 of 2 OMNI- 210 -R2 1.5" T Pressure Loss Curve with Strainer 1.5" T Accuracy Curve 14 102 d 12 — 101 101.5 to 10 100 tn -I 8 V 99 ` g 7 98 98.5 4 U 97 y U y 2 Q 96 a 0 , 95 0.751.25 7 15 30 50 80 100 160 200 0.751.25 7 15 30 50 80 100 160 200 Rate of Flow (GPM) Rate of Flow (GPM) D 1 A Register with NA n.11�� I M Pulse and AMR _ — Measuring r C ■ Chamber Assembly 1 Strainer Cover ^� Test - ..- ...... 1 1 J . ��� . ammo ' .. �r ': li, - �r�: L R Plug NISI \j �\ ; J . 7 ., 1 ±, IN. 1 : Mal TOM Direction a of Flow a "` fir r 71 i I \._ ,../1 \ rcle \�� ii9 \ \ \ \ \`tl0_� ��� G - No. of Bolts L �� ���������� N. H - Size of Bolts Maincase ` I Strainer Screen T Rotor DIMENSIONS AND NET WEIGHTS Meter and Normal Dimensions Net Shipping Pipe Size Operating Range Connections A B C D E F G H J Weight Weight 1 -1/2" .75 gpm 200 gpm Flanged 13" 7 -7/8" 15/16" 5 -1/8" 2- 5/16" 4" 2 5/8" 1" 18.8 lbs. 22.5Ibs. DN 40mm .17 ma/hr 45 m /hr 330mm 200mm 24mm 130mm 59mm 102mm 2 16mm 25mm 8.53 kg. 10.20 kg. SPECIFICATIONS SERVICE Measure of potable water. FLANGE 1 -1/2" U.S. ANSI B16.1 /AWWA Class 125 Operating temperature range of 33 °F (.56°C)- 150°F (65.6 ° C). CONNECTIONS OPERATING 100% ± 1.5% from 1.25 - 200 GPM (.28 - 45 m REGISTER Fully electronic sealed register with programmable RANGE registration ( Gal. /Cu.Ft./ Cu. Mtr. / Imp.Gal / Acre Ft.■ LOW FLOW 95 %- 101.5% @ .75 GPM (.17 m3 /hr) Programmable AMR/AMI reading and pulse outputs — Guaranteed 10 year battery life MAXIMUM 160 GPM (36 m /hr) CONTINUOUS NSF APPROVED Maincase: Coated Ductile Iron OPERATION MATERIALS Measuring Chamber: Thermoplastic Rotor "Floating Ball ": Thermoplastic MAXIMUM 200 GPM (45 m3 /h) Radial Bearings: Hybrid Thermoplastic INTERMITTENT Thrust Bearings: Sapphire /Ceramic Jewel OPERATION Magnets: Ceramic Magnet PRESSURE 6.9 psi © 160 GPM (48 bar @ 36 m' /hr) Strainer Screen: Stainless Steel LOSS Strainer Cover: Coated Ductile Iron MAXIMUM 200 PSI (13.8 bar) Test Plug: Coated Ductile Iron OPERATING PRESSURE Page 2 of 2 AUTHORIZED SENSUS DISTRIBUTOR P.O. Box 487 I 450 North Gallatin Avenue SE11S Uniontown, PA 15401 USA C T: 1- 800 - 638 -3748 F: 1 -800- 888 -2403 www.sensus.com /water h2oinfo @sensus.com