AHBP SG FTV 6 1#0378.qxp & Suction Guide Flo Trex Valve
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Suction Guide & Flo-Trex Valve Series Pump Trim FILE NO: DATE: SUPERSEDES: DATE: 6-1 August 2010 6-1 July 2007 Series SG & FTV Suction Guides Designed for direct mounting on the suction flange of horizontal and vertical pumps. Armstrong Suction Guide Design: Model SG: Supplied with cast iron body and 125 psig/PN16 flanges. Model SGG: Supplied with ductile iron body with grooved inlet connection and 125 psig/PN16 outlet flange. Model SGHH: Supplied with ductile iron body and 250 psig/PN25 flanges. 90° Elbow Mounting the Suction Guide on any pump suction turns the piping 90°, replacing an elbow. In addition, the Suction Guide can be rotated to any position allowed by the pump suction bolts, from vertical to horizontal. In-Line Strainer The stainless steel strainer has free area of at least 250% of pipe sectional area. A disposable fine-mesh strainer is installed for start-up cleaning. Reducing Elbow The Suction Guide connects same size piping to the pump suction, but can also connect to inlet piping one size larger than the pump suction, eliminating a reducing elbow. Guide Vanes Flow stabilizing vanes on the outlet allow the Suction Guide to bolt directly to the pump, saving the space and cost of a long straight pipe length. 2 Suction Guides and Flo-Trex Valves Armstrong Model FTV Flo-Trex combination valves combine the features of a check valve, throttling valve, and a shut-off valve, and are designed for installation on the discharge side of centrifugal pumps. The convertible body design permits the valve to be changed on site from the straight to the angle configuration. Armstrong Model FTV Flo-Trex Valve Design: Model FTV-F: Flo-Trex valve is supplied with hard (cast-in) flanges. Model FTV-G: Flo-Trex valve is supplied with grooved port connections, designed for Armstrong ArmgripTM flange adapters or standard grooved pipe fittings. Drip-tight Shut Off Valve The Armstrong Flo-Trex valve is designed and tested for drip-tight isolation at 150% of maximum working pressure. Non-slam Check Valve The Armstrong Flo-Trex valve incorporates a spring closure design that closes the valve in a controlled manner, protecting the valve from slamming due to a reversal in flow caused by gravity or re-circulation from a parallel pump. Flow Throttling Valve The Armstrong Flo-Trex valve uses a plug and disc design which is the most effective valve type for combining throttling of flow and isolation. Other design valves may be effective for throttling or isolation, but not both. Convertible Body Design The Armstrong Flo-Trex convertible body design permits the valve to be changed on-site from straight to angle configuration. 3 Suction Guides and Flo-Trex Valves Armstrong Method • Fewer components required as redundant fittings are eliminated Flo-Trex Combination Valve • Fewer connections required with Armstrong's multipurpose fittings • Less installation time required by reducing the number of fittings Suction Guide with Strainer • Less installation space required as pump inlet spool piece is eliminated Base Mounted Single Suction Pump Flo-Trex Combination Valve The Smart Choice Suction Guide with Strainer An Armstrong Vertical In-Line Pump installation requires the fewest components and connections, maximizing savings and minimizing installation time. Base Mounted Double Suction Pump Flo-Trex Combination Valve Suction Guide with Strainer Vertical In-Line Pump 4 Conventional Method Components eliminated using Armstrong Flo-Trex Valves and Suction Guide strainer for base mounted single and double suction pump installations and Vertical In-Line installations: 5 1 4 1. “Y” Strainer 7 7 2. Suction long radius elbow 3. Discharge long radius elbow 8 2 4. Discharge check valve 6 5. Discharge globe valve Base Mounted Single Suction Pump 6. Suction spool piece 5 In addition, use of the FTV-G style eliminates three welded flange connections. 1 4 7 7 3 2 6 8 Base Mounted Double Suction Pump Additional components eliminated using Armstrong Vertical In-Line pumps with Flo-Trex Valves and Suction Guide strainers in place of base mounted applications: 5 1 7. 4 Flexible connectors 8. Inertia base isolation 9. Field shaft alignment (not shown) 3 2 6 Vertical In-Line Pump 5 Materials of Construction Suction Guides Flo-Trex Valves Model Body Cover Strainer 3 mm (1/8”) Perforations Fine-Mesh (Start-Up) Strainer Guide Vanes Model SG Cast Iron Ductile Iron Stainless Steel Galvanized Steel Cast Iron FTV-F 125 PN16 Cast Iron SGHH Ductile Iron Ductile Iron Stainless Steel Galvanized Steel Ductile Iron FTV-F 250 PN25 FTV-G PN25 Stem & Seat & Port Spring O-Ring Fittings Bronze Stainless Steel EPDM Brass Ductile Iron Bronze Stainless Steel EPDM Brass Ductile Iron Bronze Stainless Steel EPDM Brass Body Disc Suction Guide Body Cast iron, or ductile iron, with PN16 or PN25 flanges. Same size ports are available with over- sized inlet flange to eliminate reducer. Start-up strainer Removable fine mesh strainer, furnished as a standard item, helps prevent mechanical seal or instrument damage during initial run period. Guide Vanes Stabilizing vanes reduce turbulence, thereby creating optimum flow conditions and minimizing stress on pump components. Optional magnet to help eliminate free floating metallic particles from system. Strainer 3mm (1/8”) perforated stainless steel, star-shaped for added Model SG Suction Guide Removable cover, with O-ring, enables easy access to strainer. strength, designed to provide large free flow area to reduce pressure drop. Maximum Operating Parameters Suction Guide & Flo-Trex Pressure/Temperature Parameters (27.6) 400 Pressure - psig (bars) (20.7) 300 SGHH 250#/PN25 flanges FTV-F 250#/PN25 flanges FTV-G 250#/PN25 flange adapter VITON (13.8) 200 (6.9) 100 SG, SGG 125#/PN16 flanges FTV-F 125#/PN16 flanges FTV-G 125#/PN16 flange adapter VITON (0.0) 0 -50 (-45.6) 0 (-17.8) 50 (10.0) 100 (37.8) 150 (65.6) 200 (93.3) 250 (121.1) Temperature - °F (°C) Note: For temperatures from 230°F to 300°F (110°C to 149°C) use Viton Elastomer. 6 300 (148.9) Technical Information Design Benefits Flow/Temperature Measurement Ports Drain Connection (on opposite side) Flow Indicator Scale • Reduced field installation and material costs. • Cast iron or ductile valve body with hard flanges, or ductile iron valve body with standard grooved ends. • Eliminates requirement for two separate valves on pump discharge and, in some cases, a 90° elbow. ArmgripTM Anti-rotation Lugs Bonnet “O” Ring Stainless Steel Stem Resilient Seat • FTV-G eliminates three welded flange connections. • Soft seat to ensure tight shut-off. Bronze Disc • Spring-closure design uses a non-slam silent check valve feature for vertical mounting. • Flow measurement and pump throttling capabilities. Stainless Steel Spring • Temperature measurement capability. • Spring-closure design check valve prevents gravity or reverse circulation when pump is not operating. Seat Gasket Model FTV-GA Flo-Trex Valve • Bonnet “O” Ring can be replaced under full system pressure by back seating of valve stem. • Suitable for maximum working pressure up to 375 psi (26 bars) and temperatures up to 110°C (230°F). • Optional Viton elastomer for temperatures up to 150°C (300°F). Flow Indicator Scale • Valve seat can be changed in the field without use of special tools. • Low pressure drop due to “Y” pattern valve design. Flow Indicator Scale The valve stem, with its grooved rings and positioning sleeve, indicates the throttle position of the valve. Gasket ArmgripTM Flange Adapter The quarter turn graduations on the sleeve, with the scribed line on the stem, provide for approximate flow measurement. Hard Flanged Body or ArmgripTM Flange Adapter The hard flanged body or the combination of the Armstrong flange adapter and Flo-Trex body, equipped with the unique ArmgripTM anti-rotation lugs, ensures a rigid pump installation. 7 Typical Specification - Pump Trim Suction Guides Furnish and install on the suction of each pump an Armstrong Suction Guide, with Outlet Flow Stabilizing Guide Vanes, removable Stainless Steel Strainer and Fine Mesh Start-up Strainer. For 10 bar flanged pipe - Supply valve with Cast Iron body with PN16 flanged ports. For 20 bar flanged pipe - Supply valves with Ductile Iron body and PN25 flanged ports. The mechanical contractor shall inspect the strainer prior to activating the pump and, further, shall remove the Fine Mesh Start-up Strainer after a short running period (24 hours maximum). Space shall be provided for removal of the Strainer and connection of a blow-down valve. Flo-Trex Valves Furnish and install on the discharge side of each pump an Armstrong Model FTV Flo-Trex Combination Valve. Each valve is to incorporate the following three functions in one body: Tight shut-off, spring-closure type, silent non-slam check giving effective throttling with flow measurement capability. The body shall have (2) 1/4” NPT connections on each side of the valve seat. Two connections to have brass pressure and temperature metering ports, with Nordel check valves and gasketed caps. Two other connections to be supplied with brass drain plugs. Metering ports are to be interchangeable with drain ports to allow for measurement flexibility when installed in tight locations. The valve disc shall be bronze plug & disc type with high impact engineered resin seat to ensure tight shut-off and silent check operation. The valve stem shall be stainless steel with flat surfaces provided for adjustment with open-end wrench. For Grooved Piping: Valve body shall be ductile iron with grooved ends and Armstrong anti-rotation ArmgripTM lugs on the inlet and outlet of the body. Flange adapters, where necessary, are to be Armstrong ArmgripTM PN16 or PN25 ductile iron flanges with anti-rotation lugs and EPT gaskets. For Welded Flange Piping: For 10 bar flanges - Valve body shall be Cast Iron with PN16 flanged ports. For 20 bar flanges - Valve body shall be Ductile Iron with PN25 flanged ports. The valve shall be selected and installed in accordance with the manufacturer’s instructions and be suitable for the pressure and temperature specified. Insulation (Available for 2.5” - 6” Flo-Trex Valves) Each valve shall be furnished with a pre-formed removable PVC insulation jacket to meet ASTM D1784 Class 14253-C, MEA #7-87, ASTM-E-84 and ASTM136 with a flame spread rating of 25 or less and a smoke development rating of 50 or less. There will be provided sufficient mineral fibreglass insulation to meet ASHRAE 90.1-1989 specifications in operating conditions with maximum Fluid Design Operating Temperature Range of 60°C-93°C (141°F-200°F) and Mean Rating Temperature of 52°C (125°F). Our policy is one of continuous improvement and we reserve the right to alter our dimensions and specifications without notice Armstrong Integrated Limited Wenlock Way Manchester United Kingdom, M12 5JL T: +44 (0) 8444 145 145 F: +44 (0) 8444 145 146 S. A. Armstrong Limited 23 Bertrand Avenue Toronto, Ontario Canada, M1L 2P3 T: 001 416 755 2291 F: 001 416 759 9101 For Armstrong locations worldwide, please visit www.armstrongintegrated.com
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