Tilting disc check valves with hydraulic damper eliminate the closing slams and water hammer for entire closing stroke. The dynamic opening force on the disc depends on the density of the medium and the. If the back flow reaches to check valve before the disc closed, the result will be slammed closing and water hammer. The tilted disc allows a flow area that is 40% greater than the nominal bore of the pipe. The pivots are located just above the center of the disc, offset from the plane of the body seat. 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. Emergency valve for automatic back flow prevention in the event of pipe rupture or interruption of. Disc check valve with centering ring for placing between flanges in accordance with din, une, ansi, bs, etc. Usually used in water pipework systems and installed immediately after the pump. When flow reduces or reverses if the pump fails then the disc. Tilting disk check valves check flowserve skip to main content. Better closing characteristics due to the smaller swing angle of the disc. 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.
Tilted disc check valves check valve mga controls ltd. Cf3m cast 188 stainless steel type 316l body and bonnet. Slanted seat check valves are so designed that the seating plane makes an angle with the vertical plane to reduce the swing angle and closing time. Cf8c cast 188 stainless steel type 347 body and bonnet. The milliken flex check valve has only one moving part. 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. 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.
Not only do these check valves operate ideally, they also offer added advantages. As a result, tilted disc check valves offer both low head losses and excellent nonslam performance. The flow swing open the disc, that is seated, on closed position, against a mating conical surface. Swing check valves tilting disc check valves performance in any application cast steel valves gate valves serve as efficient stop valves with flow in either direction. 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. They are ideally suited for clean municipalindustrial water and other industrial liquid applications. From the most common application to the most severe, velan has a solution. The shafts are in maintenancefree, selflubricating friction bear. The general types of check valves are swing, tilting disk, piston, butterfly, and stop. Avk tilting disc check valves are installed in pumping applications to prevent backflow in the system. These check valves have a singlepiece disc without a hinge. The check tilting disk check valve is a costeffective valve with a unique design that provides excellent tightness and minimizes waterhammering. Valve cracking pressure is equal to or less then 0. Tilting disk check valves can be installed in horizontal lines and vertical lines having upward flow.
Tilted disc check valves are very high performance check valves, designed for applications that display very high flow characteristics. 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. Check valve swing check valve, tilting disc check valve. Closure is accomplished by the weight of the check mechanism, by back pressure, by a spring, or by a combination of these means. 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. The cni tilting disc check valve uses gravity to rapidly close the disc upon reversal of flow. A wide variety of tilting disc check valve options are available to you, such as pressure, power, and material. The most common check valve is the disc type horizontal or vertical. Velan products pressure seal forged and cast steel valves pressure seal tilting disc check valves. The tilting disk check valve is similar to the swing check valve.
The tilted disc check valve is an excellent choice for raw water, cooling water and treated waterwastewater applications. The double disc check valve can be installed in either horizontal or vertical pipelines that carry clean water or air. The pressure of the fluid passing through the system opens the valve, while any reversal of flow will close the valve. It is also known as a tilt check valve or a tilting disk check valve. We can produce swing check valve, tilting disc check valve, dual check valve, double check valve, wafer check valve, vertical check valve, piston check valve, stainless steel check valve, api check valve, etc. The spring and disc construction allows the valve to open at the slightest pressure differential, and the valve seat provides an extremely tight seal.
The circular wafer body is designed to be clamped bet ween two pipe flanges. One of the most comprehensive valve product lines available from any manufacturer. Closing speed is adjustable depends on working conditions. Insert check valves 0 20 40 60 80 100 160120 140 flow m3h 50 45 40 35 30 25 20 15 10 5 delta p kpa cs 100 dn 100 mounting example oring product dimensions pressure losscurve the watts check valve type cs 100 is the latest generation of check valves. We are the professional check valve manufacturer in china. Apco slanting disc check valves frank olsen company. These check valves can be used in all non return applications. Parts in contact with line fluid either cast or forged 188 stainless steel or equivalent. Tilting disc check valves produce slightly more pressure drop than swing check valves of the same size. The check valve shall be of the tilting disc type as manufactured by henry pratt company.
Because of the disc travel, swing check valves are generally not used for systems in which water hammer is likely to occur. 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. Throttling is not recommended because partially open gate valves exhibit flow. Not for sea water or other liquids with high chloride content. An introduction to nonreturn valves and the importance of correct. Disc check valve 2026 2026c ball valve, ball valves. When flow is moving forward, the valve easily opens and when there is flow reversal, the valve immediately closes. Keckley globe check valves center guided silent type are suited for liquid applications only. 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. 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. It is suitable for use on a wide range of fluids for.
Nafcheck tilting disc check valves size 224, ansi class 150 and 300, naf 526440 528661 fk 30. Like the swing check, the tilting disk type keeps fluid resistance and turbulence low because of its straightthrough design. It is also available in ansi and api standards see catalogue sheet fk 30. Check valves or non return valves are designed to ensure one way flow only. Apco csd slanting disc check valves are available in sizes 272 501800mm with asme 125150 flanged end connections or 248 501200mm with asme 250300 flanges. A list of the international flange standards to which the valve is adapted is shown on. Closing time is reduced compared to the other check. The pratt tilting disc check valve is the most versatile and reliable check valve pratt has to offer. For applications requiring natural gas, steam, or vacuum service please refer to our wafer double disc check valve. The valve closes the instant backpressure exceeds line pressure. Tiltingdisc check valves, short body to din 3202 series f4 for liquids and gases, pn 10 pn 40, dn 150 dn 2000. Tilting disc check by mounting the disc hinges lower on the disc, the energy required to open this check valve is greatly reduced.
They are commonly used where a minimum pressure drop is important. Unique design gives excellent tightness and minimizes waterhammering. 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. This simple, innovative valve provides dependable, maintenance free performance, and quiet operation with its inherent nonslam construction.
The dcv1 disc check valve is of the wafer pattern designed to be sandwiched between flanges. Dn15 to 100 dn125 to 200 see catalogue for model 172. For use in hydraulic, pneumatic, heating and steam systems, chemical and food industries, etc. Superior flow characteristics the apco slanting disc check valve, because of. The apco slanting disc check valve, because of its very unique two piece design and slant disc position, has superior flow characteristics lowest head loss when compared to any hinged disc type check valve available. Tilting disc check valves have to close rapidly since the disc has a shorter distance to travel and therefore arrives at the seat faster. Forged steel gate, globe, swingliftball, check, needle globe size range. 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. Our two piece body design allows for a 40% expanded cross sectional flow area, so the area.
400 329 271 1520 796 239 452 116 220 1479 247 863 1272 9 1175 1230 230 1456 1371 919 1592 193 1505 1207 661 1051 1159 98 463 638 1074 1196 957 1395 1123 957 157 505 839 755 75 974 171