Check valve swing check valve air cushion the traditional swing check valve is defined in awwa standard c508, has metal or resilient seats, and swings through a 60 to 90 degree stroke. Particular check valves perform additional services as follows. Swing check valves ansi swing check valves class 900 dimensions and weights nom size in 2 21. Designed to prevent backflow in horizontal piping systems.
Swing check valve description swing check valves, like all check valves, are used to prevent back flow in the line. Ask us how to spec the right check valve, or get catalogs, chemical resistance guides and submittals. Series 8001 swing check valves are of selfcontained, free swinging disc. Swing check valves prevent reversal of flow through pipe lines. Stop check valves tilting disc check valves are similar to swing check valves. Pdf swing check valve design criteria and cfd validation.
It is designed, manufactured, and tested in accordance with api6d q1 unless otherwise specified. Check valves shall be of swing check flapper type and meet materials requirements of awwa c508. Therefore, they are to be stored in a place, which is also to be kept as cool, dry and dark as possible. The swing check valve is manufactured with a ductile iron body, brass seat, and a rubberfaced clapper assembly, hinged to a removable access cover for easy inspection and maintenance. Inspection of valve during operation is recommended so that. The swing check valve functions by allowing flow forces to move the closure element. A conduit clapper profile that closely matches the valve bore helps to guide the pig through the body of the valve and into the downstream pipe. Swing check valve swing check valve manufactured in compliance with ansiawwa c512 date. The swing check valve must be installed in an area not subject to physical damage. In these valves, a clapper hangs from a hinge, a clapper shaft, or a pin mounted to the underside of the bonnet. Api 594 cast steel swing check valve quick sheet qs velan. Mueller canada offers several types of check valves including.
The valve is designed for municipal and industrial water and wastewater applications and fully complies with ansiawwa c508 and mss sp71mss sp6. When corrosive atmospheres andor contaminated water supplies are present, it is the owners responsibility to. Swing check valves installation instructions models 78 flomatic corporation flomatic corp, 15 pruyns island, glens falls, new york 12801 phone. In vertical installations, typical swing check valves must have an offset pipe section installed since these valves only function in a horizontal position. Products cast steel bolted bonnet valves swing check. Bonnet check valve and significantly reduces costs. Swing check valves allow liquid to flow in a single direction.
Trim number 1 may be replaced by trim number 8 without notice. When a check valve is needed to prevent backflow, nibco has a complete lineup, including the nibco ring check with selfclosing disc, horizontal swing, sliding disc, silent check and y pattern. For additional types of check valves, please visit. Valves shall incorporate a single disc design suitable for either horizontal or vertical installations. The secret to the tom wheatley swing check valves success is. A swing check valve or tilting disc check valve is a check valve in which the disc, the movable part to block the flow, swings on a hinge or trunnion, either onto the seat to block reverse flow or off the seat to allow forward flow. For gritty liquids, a composition disk is advisable to reduce damage to the seat. Swing check valves ansi swing check valves class 150 dimensions and weights nom size in 2 21. Near pumps with unstable flow, use av swing check valves. All swing check valves shall be of solid thermoplastic construction, having no metal. Api swing check valve is a casted full bore valve, swing check type, horizontal mounting, manufactured. A broad range of configurations that includes piston, tilting disc, springloaded disc and dualplate models meets the critical, hightemperaturepressure demands of the worlds major industries. They offer low resistance to flow and are particularly suited to low velocity service. The basic design of a check valve inhibits backflow in a line.
Class 125 bronze check valves horizontal swing regrinding type ypattern renewable seat and disc 125 psi8. While they may hold pressure in the reverse direction, they are not intended for use as isolation valves without special provisions e. Swing check valves are to be transported in their original packaging and to be stored in a clean location. For valves size 24 and smaller, the check valve is also equipped with external counterterbalance. Dn200 pvc or gfpp twoinone seat counterweight optional heavy duty body clapper assembly flange oring seal o.
The valmatic swing check valve incorporates many design features and characteristics that will provide energy savings, ease of maintenance and extended valve life. Robust onepiece construction to withstand the severe shock of check valve service. Check valves shall be ductile iron body, bronze and stainless mounted, full opening swing type. Utility swing check valves are designed for horizontal installations, but may be installed in upflow only vertical position. Hd swing check valve can be installed vertically or horizontally with flow direction as marked on the valve.
Wafer check valves reduce the effect of water hammer fm approved for such service. Model 78 is a unique flapper style swing check that permits flow in one direction only and is tight seated when the outlet pressure exceeds the inlet pressure. The ring is in forged stainless steel and is part of the trim. Hardfaced with cr, cocr alloy, ss 316, or monel, ground and lapped. Because of the long stroke, inertia of the disc, and friction in the. Counterbalance arms and weights counterbalance arms and weights for use with crown swing check valves. Inspection of valve during operation is recommended so that outside linkage can be inspected for proper operation. Wheatley swing check valve prevents backflow in a fraction of a. Ansi class valve type gate valve globe valve swing check symbol g gl s code class lb 1 150 3 300 6 600 9 900 15 1500 25 2500 2. Pdf this paper provides information on swing check valve selection criteria suitable for nuclear power plant applications.
Check valves must be installed with the valves flow arrow pointing in the direction of the flow. The viking swing check valve is a general purpose rubberfaced check valve approved for use in fire protection systems. The seat opening crosssection may be perpendicular to the centerline between the two ports or at an angle. Armtype check valve prevents fluid resistance increase. This valve is not designed to handle impacts of any kind. Most crane swing check valves can be installed in horizontal or vertical, upward flow, piping. Operating instructions a2600 series awwa swing check. Outside lever check valves may be fitted with a limit switch to detect flow. Swing check valves may be mounted vertically with flow upward or horizontally. Swing check valve 3 3 general instructions for transportation, unpacking and storage when suspending and supporting a valve, take care and do not stand under a suspended valve. The tom wheatley check valve is designed to facilitate pigging operations and to protect instrumentation on intelligent pigs.
Our experience has demonstrated our capability to handle the combination of high pressure and very low temperatures. Operating instructions a2600 series awwa swing check valve. The pin can be easily removed for maintenance of the valve. The model 78 swing check does not require any regular maintenance. Valco groups product portofolio contains strong and well established valve brands from inhpuse production, as well as provision of third party products. Check valves, also known as nonreturn or oneway valves, are designed to enable fluid to flow one way in a pipeline. Petrolvalves experience in the swing check valve design grew faster and faster, driving the company to challenge itself with more and more complex products, such as large. Swing check valves include sealing elements consisting of organic material, that reacts to environmental effects. Valve body shall be enlarged to allow disc to swing in the waterway. Kfs diversity in check valve configurations and materials of construction provide opportunities to service customers in many different markets. The regular swing check valve is not suitable if there is frequent flow reversal due to the pounding and wearing of the disk.
Cushioned swing check valve dependable, nonslam operation the ga figure 250ds cushioned swing check valve is a counterweighted, rubberseated check valve with a specially designed external, sidemounted cushion chamber. July, 2016 specifications for swl swing check valves general. The pressure of the fluid passing through a system opens the valve, while any reversal of flow will close the valve. Leakfree, tight sealing, protection against reverse flow and minimal flow direction changes are at the core of flowserve check valve designs. Minimum back pressure to close valve psi cv values troubleshooting what if valve leaks through the seat. Class 125 threaded cap brassbonze disc threaded ends figure 37 class 125 threaded cap ptfe disc threaded ends figure 41tf. Selection check valves are for the prevention of backflow. Brayrite vertical assembly compared to conventional check valve assembly.
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