Crane nuclear twopiece tilting disc check valve principle of operation the core of a cni twopiece tilting disc check valve consists of a pivoting circular disc secured within a cylindrical housing. The pivots are located just above the center of the disc, offset from the plane of the body seat. Lightweight discs and spring assisted closure combine to allow the noreva. It is also available in ansi and api standards see catalogue sheet fk 30. Kooij for his contribution to the cvwp manual and the distribution of the.
The sole purpose of a valve is to regulate flow throughout a fluid processingtransport system whether it is starting, stopping, throttling, or simply controlling flow rate. Pressure seal tilting disc check valves crane nuclear. It is also known as a tilt check valve or a tiltingdisk check valve. They are in forged stainless steel machined from ground bar. Pulp and paper waste water treatment plants food and beverage etc. Tiltingdisk valve definition of tiltingdisk valve by the. 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 gcf sierra model 5400 is a swing type tilting disc check valve that is a development of the traditional type swing check valve that has been designed to allow for frequent flow reversals without causing wear in the shaft seat which is a common feature of the swing check. You can also choose from manual non slam check valve, as well as from stainless steel non slam check valve there are 128 suppliers who sells non slam check valve on, mainly located in asia. Tilting disc, slanted metal seat check valve for drinking water and other neutral liquids to max. In case the outer diameter 1 5 swing check valves bs 1868 check. Tilting disc prostheses use a single circular leaflet or disc that tilts to occlude or open the valve orifice. Velan products pressure seal forged and cast steel valves pressure seal tilting disc check valves.
Tilting disc check valve,cast steel tilting disc check valve. Figure number system check valve series check valve figure. Tilting disc check vs swing check valve valve engineering. Tilting disc check valve dn250dn1200 model tcv challenger. Tilting disc check valve,china tilting disc check valve. The tilted disc check valve is an excellent choice for raw water, cooling water and treated waterwastewater applications.
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 check tilting disk check valve is a costeffective valve with a unique design that provides excellent tightness and minimizes waterhammering. Gates globes angles swing checks tilting disc checks. Suitable for all the standart flanges short face to face. To satisfy your needs, specify check valves from crane energy flow solutions the worldwide leader of valves manufactured for the prevention of backflow. The dynamic opening force on the disc depends on the density of the medium and the. A wide variety of non slam check valve options are available to you, such as low pressure. Brayrite inlet ports and disc have been shape optimized to achieve. Tilting disc check valves have to close rapidly since the disc has a shorter distance to travel and therefore arrives at the seat faster.
They offer low resistance to flow and are particularly suited to low velocity service. Nafcheck tilting disc check valves size 224, ansi class 150 and 300, naf 526440 528661 fk 30. Slamming of check valves is the result of failure of the valve disc to reach its closed position before the fluid flow reversal. Unlike most other tilting disc check valves which must swing through a 90 arc, the pacific valve design fully opens or closes through an arc of only 45. The flow swing open the disc, that is seated, on closed position, against a mating conical surface. Ritepros brayrite wafer combination swing check valves are flow activated and rite sized. Tilting disc type bonnetless tilting disc check valves, otherwise called equilibrated disc check valves, have the well known features of a typical no slam behavior. Typical newco cast steel bolted cover tilting disc check valve expanded view note. Wafer check valves goodwin crane mission stockham style. Use the diagram 1 for vertical pipe and diagram 2 for horizontal pipe. Pulp and paper wastewater treatment plants food and beverage etc. The check valve shall be of the tilting disc type as manufactured by henry pratt company.
The tilted disc allows a flow area that is 40% greater than the nominal bore of the pipe. The pratt tilting disc check valve is the most versatile and reliable check valve pratt has to offer. 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. Nafcheck tilting disc check valves dn 40, pn 10 pn 40, naf 526520 528630 fk 30. Check valves are used to stop backflow and protect rotating equipment or other mechanical devices from the sudden backflow surges that may occur. The ring is part of the trim of the valve, and is supplied as weldedin as a standard. Tilting disc valve definition of tilting disc valve by. Stop check valves tilting disc check valves are similar to swing check valves. A tilting disc check valve is a check valve where the disc has a pivot point at the center of the disc. Gate, globe, angle globe, swing check, tilting disc check, and stop check valve configurations are designed to perform different functions within a fluid system. 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. A tilteddisc check valve often provides slamfree operation without dashpots.
Short disc travel from full open to full close provides the ability to close very. Closing speed is adjustable depends on working conditions. Most crane swing check valves can be installed in horizontal or vertical, upward flow, piping. But here is where the similarities to traditional swing check valves end. Erhard erk tilting disc check valve 2 the universal check valve with double excentric valve disc a key component of the erhard erk tilting disc check valve is the valve disc which has a freely oscillating, flowfacilitating design with double eccentricity support. An investigation of the dynamic characteristics of a tilting disc check. The vatac wafer ends tilting disc check is an excellent choice for raw water, cooling water and treated waterwastewater applications. Material list of tilting disc check valveastm standard material for sizes and classes not shown,please contact our sales department technical specification no.
One of the most comprehensive valve product lines available from any manufacturer. If the back flow reaches to check valve before the disc closed, the result will be slammed closing and water hammer. Tilted disc check valves are very high performance check valves, designed for applications that display very high flow characteristics. Naf check tilting disc check valves dn 40, pn 10 pn 40, naf 526520 528630 fk 30. Fluidstructure analysis cho and kane 1980 combine a fluid and structure.
Figure number system check valve series check valve. These check valves have a singlepiece disc without a hinge. Carbon steel tilting disc check valve,wcb tilting disc check. Emergency valve for automatic back flow prevention in the event of pipe rupture or interruption of.
The check valve is seen from the side, with the valve housing surrounding the movable disc and a weighted lever attached to it. Tilting disc check valve alloyduplex stainless steel tilting disc check valve pressure rating. 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. 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. When flow is moving forward, the valve easily opens and when there is flow reversal, the valve immediately closes. Tilting disc check valves produce slightly more pressure drop than swing check valves of the same size. Swing check valves prevent reversal of flow through pipe lines. 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. 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. Tilting disc check valves with hydraulic damper eliminate the closing slams and water hammer for entire closing stroke. These valves were developed in the late 1960s and the most popular was the bjorkshiley valve shiley, inc, irvine, california which first became available for clinical use in 1969.
Not for sea water or other liquids with high chloride content. Long leaf springs prevent rubbing of disc and seat. The disc pins are centred in position with two flanges and they can be easily removed for maintenance of the valve. The disc is rotating about an axis located in the flow. 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.
Manufacturing north america manufacturing europe head office montreal. Newco cast steel bodies provide low resistance flow and optimum strength and performance. Ritepros check rite wafer combination swing check valves are flow activated and. Based on dynamic tests the natural closing time of a tilting disc check valve is. Tilting disc check valvealloyduplex stainless steel tilting disc check valve pressure rating. Tiltingdisc check valves, short body to din 3202 series f4 for liquids and gases, pn 10 pn 40, dn 150 dn 2000. In response to flow forces, the disc pivots about hinge pins that are located within the geometry of the disc and slightly above the centerline of the valve body. Tilted disc check valves check valve mga controls ltd. 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. It is also known as a tilt check valve or a tilting disk check valve. Tilting disk check valves check flowserve skip to main content.
Tilting disc henry pratt company valve manufacturer. 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. The nafcheck valve is available in ansi and api standards in carbon steel and stainless steel. 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. This valve features field replaceable seat, cast iron body, stainless steel seat rings, epoxy coating inside and out and an optional bottom and top size dashpots available in sizes from 2 up to 72. The shafts are in maintenancefree, selflubricating friction bear. The cni tilting disc check valve uses gravity to rapidly close the disc upon reversal of flow. An investigation of the dynamic characteristics of a tilting. Material list of tilting disc check valve astm standard material for sizes and classes not shown,please contact our sales department technical specification no. It is also available in bs, din and ss standards see catalogue sheet fk 30. Information of tilting disk check valve creat by saranchai angkawinijwong 5610502764 chavinpat naimee 5610505887. Department of justice has cleared their proposed merger without any conditions, granting early termination of the waiting period required by the hartscottrodino antitrust improvements act of 1976 with respect to the proposed merger.
From the most common application to the most severe, velan has a solution. In response to flow forces, the disc pivots about hinge pins that are located within the geometry of. Crispin valve manufactures tilting disc valves for efficient flow reversal control. Since the tilting disc is partially balanced, the cracking pressure is lessparticularly for vertical upward flow. In tilting disc check valves, the closure element is a pivoted disc with the pivot axis closer to the center of the flow steam, if compared with the swing check models. Avk tilting disc, slanted metal seat check valves are installed in pumping applications to prevent backflow in the system.
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