The flow swing open the disc, that is seated, on closed position, against a mating conical surface. The nafcheck valve is available in ansi and api standards in carbon steel and stainless steel. Baltic valve downloads, pdf files downloads baltic valve. Tilting disc check valve operation and maintenance manual. Do not drop valve when unloading from carrier or installing into pipeline. Side entry trunnion ball valve 20 metal seated ball valve 16 top entry ball valve 5 fully welded ball valve 2 gate valve 91 wedge gate valve 80 pressure seal bonnet gate valve 8 parallel disc gate valve 3 check valve 18 swing check valve 9 pressure sealing swing check valve 2 dual plate check valve 5 tilting disc check. Valve corporationvalve corporation design features wafer style one piece body design. If the back flow reaches to check valve before the disc closed, the result will be slammed closing and water hammer.
One of the most comprehensive valve product lines available from any manufacturer. The compact design features nonslam springassisted closing. Swing check valves prevent reversal of flow through pipe lines. The pratt tilting disc check valve is the most versatile and reliable check valve henry pratt company has to offer.
It is also available in ansi and api standards see catalogue sheet fk 30. The tilting disc check valves are made of 2 piece body, designed to accomplish full flow opening by having the disc pivot or tilt in the flow media. This valve offers significant energy and cost savings over the life of the valve due to its large flow area and low head loss characteristics. Pulp and paper waste water treatment plants food and beverage etc. Gate valves are best for services that require infrequent valve operation, and where disc is kept either fully opened or closed. This shortarc coupled with the low pendulum effect achieved by pivoting the disc through a point near its. Its streamlined body contouring, flow area 40% greater than nominal pipe size and hydrodynamic disc combine to provide the lowest headloss of any check valve produced today. The tilting disc design through lifting and stabilizing in the fullopen. Bridgewater, new jersey, ais, waiver request, epa, tilting disc check valve created date. Naf check tilting disc check valves dn 40, pn 10 pn 40, naf 526520 528630 fk 30.
The cover is in carbon or stainless steel and is also available in many other cra materials. Tilting disc check valve check valves babcock valves. Tilting disc check valve, with counterweight and hydraulic damper in option, is designed as double eccentic double falnge, and is applied in the water industry, irrigation, municipal engineering, water conservancy project, drinking water engineering, and etc. The fabricast fig 6 is a fabricated and welded tilting angle disc check valve.
Tilting disc check valves are designed to prevent the disc slamming and to ensure, at the same time, a quick closing service. Oblique seat design optional spring loaded disc quick closing action tilting disc check valvetilting disc check valve c9000 c9000 fig. Design appropriate for liquid with solids concentration of 5% max. Figure number system check valve series check valve. Tilting disc check valves are designed utilizing triple offset seat geometry to prevent the disc slamming, stable disk operation and to ensure, at the same time, a. The tilting disc check valve is also offered with an upper hydraulic dashpot to aid in disc closure in multiple pump systems even after a power failure. It is also available in bs, din and ss standards see catalogue sheet fk 30. When flow is moving forward, the valve easily opens and when there is flow reversal, the valve immediately closes. Industrial valves pressure seal tilting disc check valves supplier. Crispin tilting disc check valve function description tilting disc check valve td series tilting disc check valve crispin valve, 600 fowler ave.
Heavy duty fabricated 304 or 316 stainless steel body and gate disc. Tilting disc check valve,cast steel tilting disc check valve. With the development of the first rubber seated butterfly valve more than 70 years ago, the henry pratt company became a trusted name in the flow control industry. The connection sealing surfaces are raised face or ring joint to suit the valve rating.
Tilting disc check valve,cast steel tilting disc check. Nonreturn stopcheck valves provide the same function as a globe valve with the addition of providing pistonliftcheck valve protection in the event of backflow. Material list of tilting disc check valveastm standard material for sizes and classes not shown,please contact our sales department technical specification no. Unlike most other tilting disc check valves which must swing through a 90 o arc, the pacific design fully opens or closes through an arc of only 45 o. The check valve is seen from the side, with the valve housing surrounding the movable disc and a weighted lever attached to it. Newco cast steel bodies provide low resistance flow and optimum strength and performance. Tilting disc check by mounting the disc hinges lower on the disc, the energy required to open this check valve is greatly reduced. An investigation of the dynamic characteristics of a. The valve stem is not connected to the disc, and when the stem is in the open position then the disc is free to. Emergency valve for automatic back flow prevention in the event of pipe rupture or interruption of. Tilting disc check valve top entry bs 1868 orion steel valves 64 swing check valves bs 1868. Here you can find valves you need that are not listed in product show room.
It is also known as a tilt check valve or a tilting disk check valve. Avfi specialise in a wide range of check valves non return valves include tilting disc, swing type with lever and counter weight arms, wafer check, duo check, single flap check, flex check valves and ball check valves. Dual disc check valves the dual disc check valve with its compact wafer design and low cost have made it a popular choice when space and price are major factors in valve selection. Tiltingdisk valve definition of tiltingdisk valve by. Stop check valves are essentially the same as globe and angle valves, except there is no mechanical connection between the stem and disc. Erhard tilting disc check valve with pneumatic fullopening device, ensuring. The disc is part of the trim and is in forged or cast steel. To avoid the formation of an excessively high surge pressure as a result of the valve closing, the valve must close fast enough to prevent the devel. The disc is maintained open in equilibrium by the fluid flow and when it stops the reversed flow makes the disc move to the closed position by rotating it against the seat, not slamming into it as it happens in a swing check valve.
Carbon steel,100% quantity tested before delivery established in 1985,didtek valve is a professional supplier of industrial valves for major. Part name pressure class carbon steel stainless steel alloy steel astm design of tilting disc check valve tilting disc check valve product line dn 50 65 80 100 125 150 200 250 300. Stop check valves are essentially the same as globe and angle valves, except there is. A tilting disc check valve is a check valve where the disc has a pivot point at the center of the disc. The pratt tilting disc check valve offers significant energy savings compared to other types of conventional check valves because of its larger flow area and low head loss characteristics.
Tiltingdisk valve definition of tiltingdisk valve by the. The check valve shall be of the tilting disc type as manufactured by henry pratt company. Erhard erk tiltingdisc check valve 2 the universal check valve with double excentric valve disc a key component of the erhard erk tiltingdisc check valve is the valve disc which has a freely oscillating, flowfacilitating design with double eccentricity support. Pn25 technical information check valves tilting type 100 25 2 35 19 06 x 8 4 125 25 2 70 1 84 9 3x 6 5 150 25 3025 1 8x 4 9 6 7 200 25 36 0 12 74 8x 5 250 25 4 2 53 70. Emergency valve for automatic back flow prevention in the event of pipe rupture or interruption of delivery of flow in pipe system. The tilted disc check valve is an excellent choice for raw water, cooling water and treated waterwastewater applications.
Erhard tiltingdisc check valve with pneumatic fullopening device, ensuring. A complete range of gate, globe and check valves for all of your high pressure and high temperature applications, proven over years of service in conventional thermal and nuclear power plants as well as other hp steam services around the world. Erhard erk tilting disc check valve 6 suggestion for installation of check valve and butterfly valve attention. Stop check valves tilting disc check valves are similar to swing check valves. Tilting disk check valves can be installed in horizontal lines and vertical lines having upward flow.
Nonreturn stop check valves provide the same function as a globe valve with the addition of providing pistonlift check valve protection in the event of backflow. Most crane swing check valves can be installed in horizontal or vertical, upward flow, piping. Swing check valve 50 tilting disc check valve 8 wafer check valve 19 butterfly valve 15 forged valve 60 forged ball valve 15 forged check valve 9. Tilting disc check valves with hydraulic damper eliminate the closing slams and water hammer for entire closing stroke. Typical newco cast steel bolted cover tilting disc check valve expanded view note. The circular wafer body is designed to be clamped bet ween two pipe flanges. Downloads, pdf files downloads of dervos valves dervos. When lifting, the valve should be lifted with straps or bolts in the. Use the diagram 1 for vertical pipe and diagram 2 for horizontal pipe. Nafcheck tilting disc check valves dn 40, pn 10 pn 40, naf 526520 528630 fk 30. Wcb wc6, wc9, c12a, cf8m quick deliveries available rev. Xiamen dervos upload pdf files of supplement product information.
The shafts are in maintenancefree, selflubricating friction bear. The check tilting disk check valve is a costeffective valve with a unique design that provides excellent tightness and minimizes waterhammering. Suitable for all the standard flanges short face to face. From the most common application to the most severe, velan has a solution. Installation must be effected in such a way that the weightloaded lever of the check valve is on the left seen in flow direction and that the gearbox of the butterfly valve is on the right, seen in flow direction. Jul 15, 2016 a tilting disc check valve is a check valve where the disc has a pivot point at the center of the disc. Pratt tilting disc check valve henry pratt company. Short disc travel from full open to full close provides the ability to close very rapidly.
The tilting disc check valve shall consist of a circular disc with conical rim, hinged about a fixed pivot above its centerline and offset from the plane of the seat, sealing against a body seat clamped between the two sections of the valve body. Table 4 edward cast steel tilting disk check valve flow coefficients 154 table 5 edward cast steel equiwedge gate valve flow coefficients 157 3. A disc actuated by a stem and handwheel that moves up and down at right angles to the path of flow, and seats against two seat faces to shut off flow. Highly efficient the nvf tilting disc check valve uses gravity to rapidly close the disc upon reversal of flow. They offer low resistance to flow and are particularly suited to low velocity service. The disc is rotating about an axis located in the flow. Founded in 19th century by james walworth, the company has consistently dedicated itself to improvements in design and. Closing speed is adjustable depends on working conditions. Check valves archives avfi avfi valve solutions for. Velan products pressure seal forged and cast steel valves pressure seal tilting disc check valves. Tilting disc check valve alloyduplex stainless steel tilting disc check valve pressure rating. Apr 21, 2015 challenger valves is a leading manufacturer, supplier and distributor of valves and actuation, providing products and solutions to the water, mining, power generation, irrigation and general industries. The hinge is made by forged steel and in cast steel. The dynamic opening force on the disc depends on the density of the medium and the.
A top mounted oil dashpot may be included to control the opening and closing of the valve. Tilting disc check valve dn250dn1200 model tcv challenger. Some designs simply fit between two flange faces and provide a compact, lightweight installation, particularly in larger diameter valves. Bridgewater waiver request for tilting disc check valve author. Dual plate check valve 5 tilting disc check valve 2 globe. Swing check valves are best fit for horizontal pipeline installation. The opening stroke range is much less than that of the conventional swing check valves, therefore reduces opening and closing time critical to controlling flow reversal and reducing. Nafcheck tilting disc check valves size 224, ansi class 150 and 300, naf 526440 528661 fk 30. Pulp and paper wastewater treatment plants food and beverage etc. The valve achieves full opening when the disc tilts in the flow of the media. It is also known as a tilt check valve or a tiltingdisk check valve. The rm model is a reliable metal seated check valve with oblique seating angle widely used in industries such as. Tilting disc check valve 35 1 the series 35 check valve is a reliable metal seated valve with an oblique seating angle widely used in industries such as.
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