08.08 Vic-Check Valves

Transcription

1 The check valves are a product of computer-assisted innovative engineering with quality features including a new hydrodynamically efficient profile. The Vic-Check valve utilizes a spring-assisted, single-disc design that achieves a leak-free seal with as little as 5 ft./.5 m of head pressure. The valve can be installed in both horizontal and vertical positions. check valves are engineered for long life and seize-free sealing. For the Series 76H, in -3"/50-80 sizes, the stainless steel disc seats against the o-ring seal which is mounted on the electroless nickel plated end face. The Series 76, in 4-"/ sizes, feature an elastomer encapsulated disc and a electroless nickel plated seat. -3"/50-80 size check valves are rated to 365 psi/500 kpa and 4-"/ sizes check valves are rated to 300 psi/065 kpa. ll sizes are factory tested to the rated working pressure. Drains can be optionally provided both upstream and downstream of the disc. Grooved ends allow fast, easy installation with just two Victaulic couplings. The valve may also be connected to flanged (NSI Class 50) components using Style 74 Vic-Flange adapters on either end. H job owner contractor engineer System No. Submitted By Spec Sect Para Location Date pproved Date

2 H material specifications Body: Ductile iron conforming to STM -536, grade Ductile iron conforming to STM -395, grade , is available upon special request. Body Seat: s 3"/50 80 machined surfaces electroless nickel plated. 4 "/ threaded electroless nickel plated seat. Disc Coating / O-rings: (Specify Material Choice) Grade E EPDM EPDM (Green color code). Temperature range 30 F to +30 F/ 34 C to +0 C. Recoended for hot water service within the specified temperature range plus a variety of dilute acids, oil-free air and many chemical services. UL classified in accordance with NSI/NSF 6 for for cold +86 F/+30 C and hot +80 F/+8 C potable water service. NOT RECOMMENDED FOR PETROLEUM SERVICES. Grade T nitrile Nitrile (Orange color code). Temperature range 0 F to +80 F/ 9 C to +8 C. Recoended for petroleum products, air with oil vapors, vegetable and mineral oils within the specified temperature range; except hot, dry air over +40 F/+60 C and water over +50 F/+66 C. NOT RECOMMENDED FOR HOT WTER SERVICES. Grade O fluoroelastomer Fluoroelastomer (Blue color code). Temperature range +0 F to +300 F/ 7 C to +49 C. Recoended for many oxidizing acids, petroleum oils, halogenated hydrocarbons, lubricants, hydraulic fluids, organic liquids and air with hydrocarbons to +300 F/+49 C. * Services listed are General Service Recoendations only. It should be noted that there are services for which these disc liners are not recoended. Reference should always be made to the latest Victaulic Gasket Selection Guide for specific liner service recoendations and for a listing of services which are not recoended. Discs: -3"/50-80 the stainless steel disc seats against the o-ring seal which is mounted on the electroless nickel plated end face; 4-"/ feature an elastomer encapsulated disc and a electroless nickel plated seat. Shaft: - 3"/50 80 Brass. 4 "/ Type 36 stainless steel. Spring: ll sizes Type 30/304 stainless steel. Shaft Plug: 3"/50 80 only; Type 46 stainless steel. Pipe Plug: 4 "/ only; carbon steel zinc plated to STM B-633. _

3 H dimensions B K B P P R ➀ / NPT Upstream Drain (Optional) ➁ / NPT Downstream Drain (Optional) H Typical 3"/50-80 MM R 3 C D E ➀ /" NPT Upstream Drain (Optional) ➁ /" NPT Downstream Drain (Optional) ➂ " NPT (Drain Optional) Typical 4 8"/00-00 MM J J D C E C E-E Dimensions Overall Width B C D E J K P R pprox. Wgt. Each / Lbs. kg D E K B J ➀ /" NPT Upstream Drain (Optional) ➁ /" NPT Downstream Drain (Optional) Typical 0 "/ MM _3

4 H Performance Vic-Check valves combine high pressure capabilities with low pressure drop performance. The grooved end design permits fast, easy installation. The seat provides leak-free sealing under conditions as low as five feet of head. C v /K v values for flow of water at +60 F/+6 C with a fully open valve are shown in the table at right. Formulas for C v /K v values: P = Q C v Q = C v x P Where: Q = Flow (GPM) P = Pressure Drop (psi) C v = Flow Coefficient P = Q P = Q C v K v Q = CQ v x = K P v x P Where: Where: m Q = Flow Q = (m3/h) Flow ( 3 hr. ) P = Pressure Drop (bar) K P = Pressure (bar) v = Flow Coefficient K v = Flow Factor Valve C v /K v Valve C v /K v Valve C v /K v (Full Open) (Full Open) / (Full Open) _4

5 H Flow Characteristics NOTE: Placement of check valves too close to sources of unstable flow will shorten the life of the valve and potentially may damage the system. To extend valve life, valves should be installed a reasonable distance downstream from pumps, elbows, expanders, reducers or other similar devices. Sound piping practices dictate a minimum of five (5) times the pipe diameter for general use. Distances between three (3) and five (5) diameters are allowable provided the flow velocity is less than eight (8) feet per second (.4 meters per second). Distances less than three (3) diameters are not recoended and will violate the Victaulic product warranty. The chart below expresses the flow of water at 60ºF/6ºC through valve. Series 76 Check Valve PRESSURE LOSS - P.S.I. 0 Pressure Loss (psi) 0 " & 50 3" & 80 4" & 00 5" & 39" ½" & 76" 6" & 65" Flow 000 (GPM) " 5" 6" 8" 0" " " 3".5" FLOW RTE - G.P.M. 8" & 00 0" & 50 " & 300 Series 76 Check Valve PRESSURE LOSS - (kpa) Pressure Loss (kpa) " & 50 ½" & 76" 3" & 80 Metric 4" & 00 5" & 39" 6" & 65" 8" & 00 0" & 50 " & Flow Rate 000 (Liters/Min) " 5" 6" 8" 0" " ".5" 3" FLOW RTE (Litres/Min) _5

6 H warranty Refer to the Warranty section of the current Price List or contact Victaulic for details. note This product shall be manufactured by Victaulic or to Victaulic specifications. ll products to be installed in accordance with current Victaulic installation/assembly instructions. Victaulic reserves the right to change product specifications, designs and standard equipment without notice and without incurring obligations. Updated 07/ rev H