Disc check valve with centering ring for placing between flanges in accordance with din, une, ansi, bs, etc. For use in hydraulic, pneumatic, heating and steam systems, chemical and food industries, etc. Tilting disk check valves check flowserve skip to main content. Tilting disc check valves with hydraulic damper eliminate the closing slams and water hammer for entire closing stroke. Henry pratt continues to expand our product offering to those customers who require specialty valves for applications where opening and closing times are critical to control flow reversal and reduce water hammer. They are commonly used where a minimum pressure drop is important. 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. The dcv1 disc check valve is of the wafer pattern designed to be sandwiched between flanges. Parts in contact with line fluid either cast or forged 188 stainless steel or equivalent. Tilting disc henry pratt company valve manufacturer. Because of the disc travel, swing check valves are generally not used for systems in which water hammer is likely to occur. 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. Pressure seal tilting disc check valves crane nuclear. Nafcheck tilting disc check valves size 224, ansi class 150 and 300, naf 526440 528661 fk 30.
Closing time is reduced compared to the other check. It is also available in ansi and api standards see catalogue sheet fk 30. Usually used in water pipework systems and installed immediately after the pump. 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.
The shafts are in maintenancefree, selflubricating friction bear. Closing speed is adjustable depends on working conditions. The general types of check valves are swing, tilting disk, piston, butterfly, and stop. Emergency valve for automatic back flow prevention in the event of pipe rupture or interruption of. The check tilting disk check valve is a costeffective valve with a unique design that provides excellent tightness and minimizes waterhammering. Keckley globe check valves center guided silent type are suited for liquid applications only.
Tilting disk check valves can be installed in horizontal lines and vertical lines having upward flow. Swing check valves are best fit for horizontal pipeline installation. 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. From the most common application to the most severe, velan has a solution. Use the diagram 1 for vertical pipe and diagram 2 for horizontal pipe. The tilted disc allows a flow area that is 40% greater than the nominal bore of the pipe. Velan products pressure seal forged and cast steel valves pressure seal tilting disc check valves. Our two piece body design allows for a 40% expanded cross sectional flow area, so the area. Cf8c cast 188 stainless steel type 347 body and bonnet. For applications requiring natural gas, steam, or vacuum service please refer to our wafer double disc check valve.
Naf check tilting disc check valves dn 40, pn 10 pn 40, naf 526520 528630 fk 30. The pressure of the fluid passing through the system opens the valve, while any reversal of flow will close the valve. Slamming of check valves is the result of failure of the valve disc to reach its closed position before the fluid flow reversal. A wide variety of tilting disc check valve options are available to you, such as pressure, power, and material. Baltic valve downloads, pdf files downloads baltic valve. 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. They are ideally suited for clean municipalindustrial water and other industrial liquid applications. Globe style check valves are constructed from rugged castings that are machined to exacting specifications.
The most common check valve is the disc type horizontal or vertical. The valve closes the instant backpressure exceeds line pressure. 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. Tilted disc check valves check valve mga controls ltd.
Superior flow characteristics the apco slanting disc check valve, because of. Check valve swing check valve, tilting disc check valve. Tilting disc check valves have to close rapidly since the disc has a shorter distance to travel and therefore arrives at the seat faster. These check valves can be used in all non return applications. Better closing characteristics due to the smaller swing angle of the disc. The dynamic opening force on the disc depends on the density of the medium and the.
The circular wafer body is designed to be clamped bet ween two pipe flanges. When flow reduces or reverses if the pump fails then the disc. An introduction to nonreturn valves and the importance of correct. Forged steel gate, globe, swingliftball, check, needle globe size range. Tilting disc check by mounting the disc hinges lower on the disc, the energy required to open this check valve is greatly reduced. Closure is accomplished by the weight of the check mechanism, by back pressure, by a spring, or by a combination of these means.
The tilted disc check valve is an excellent choice for raw water, cooling water and treated waterwastewater applications. The flow swing open the disc, that is seated, on closed position, against a mating conical surface. We are the professional check valve manufacturer in china. Tiltingdisc check valves, short body to din 3202 series f4 for liquids and gases, pn 10 pn 40, dn 150 dn 2000. Unique design gives excellent tightness and minimizes waterhammering. Cf3m cast 188 stainless steel type 316l body and bonnet. These check valves have a singlepiece disc without a hinge. Valve cracking pressure is equal to or less then 0. As a result, tilted disc check valves offer both low head losses and excellent nonslam performance. Disc check valve 2026 2026c ball valve, ball valves. 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.
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. Apco slanting disc check valves frank olsen company. The check valve shall be of the tilting disc type as manufactured by henry pratt company. 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. Not for sea water or other liquids with high chloride content. The pratt tilting disc check valve is the most versatile and reliable check valve pratt has to offer. The tilting disk check valve is similar to the swing check valve. 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. 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. Not only do these check valves operate ideally, they also offer added advantages. 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.
The milliken flex check valve has only one moving part. Tilting disc check valves produce slightly more pressure drop than swing check valves of the same size. 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. Avk tilting disc check valves are installed in pumping applications to prevent backflow in the system. It is also known as a tilt check valve or a tilting disk check valve. Tilted disc check valves are very high performance check valves, designed for applications that display very high flow characteristics.
The pivots are located just above the center of the disc, offset from the plane of the body seat. The spring and disc construction allows the valve to open at the slightest pressure differential, and the valve seat provides an extremely tight seal. If the back flow reaches to check valve before the disc closed, the result will be slammed closing and water hammer. Throttling is not recommended because partially open gate valves exhibit flow. The double disc check valve can be installed in either horizontal or vertical pipelines that carry clean water or air. When flow is moving forward, the valve easily opens and when there is flow reversal, the valve immediately closes. 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. 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. Check valves or non return valves are designed to ensure one way flow only.
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 cni tilting disc check valve uses gravity to rapidly close the disc upon reversal of flow. Tilting disc, resilient seat check valve with lever and weight for drinking water and other neutral liquids to max. Dn15 to 100 dn125 to 200 see catalogue for model 172. It is also available in bs, din and ss standards see catalogue sheet fk 30. A list of the international flange standards to which the valve is adapted is shown on.
1450 955 1347 148 295 756 1310 335 673 231 1302 1472 1336 813 1356 933 1242 1327 1471 100 1007 1020 1488 1442 33 1293 181 838 636 1392 506 677 360