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. Stop check valve is a combination of a lift check valve and a globe valve. Bolted bonnet horizontal swing renewable seat and disc 200 psi. Wafer double disc check valve style dd, dl, and df pressure drop chart this pressure drop chart is based on the flow of clean water through the keckley double disc check valve. Titan is committed to maintaining a large inventory of silent check valves, center guided check valves, double disc check valves, and single disc check valves in a variety of types. Tilting disc check valve operation and maintenance manual.
Keystone rubber disc check valve figure 87l features double flanged design. A guide keeps motion of the disc on a vertical line, so the valve can later reseat properly. The valve body shall be constructed of ductile iron astm. Check valve shall be of the flexible disc, full body check valve type with no internal moving parts except the closure disc. The nafcheck valve is available in ansi and api standards in carbon steel and stainless steel.
Thanks to their energy saving design, they are believed to be the highest performing, but cost effective check valve on the market today. Titan is committed to maintaining a large inventory of silent. The twopiece body design allows for a 40% expanded cross sectional flow area, compensating for the disc mass. Disk type check valve eclipse series disc type check valves are designed to prevent reverse flow of gas or air, however, they are not designed for tight shutoff. Check valves types, construction, applications and. T433y check valve bronze, ptfe disc, threaded ends on nibco.
Mueller canada offers several types of check valves including. Scv full port swing check valves are all designed to operate without any assistance, reacting to dominate flow direction. They are ideally suited for clean municipalindustrial water and other industrial liquid applications. The swing check valves are automatically held in a central position by the. Check valves should be placed at a distance equal to 5 to 10 pipe. These valves can be closed with the help of a stem that is not connected to the valve disc during normal operation and make it possible to use these valves as a regular nrv. Spring loaded disc to prevent reverse flow in pipe lines.
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. 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. Leakfree, tight sealing, protection against reverse flow and minimal flow direction changes are at the core of flowserve check valve designs. Because of the disc travel, swing check valves are generally not used for systems in which water hammer is likely to occur. The keckley style dd has a cracking pressure equal to or less than 0. The tilted disc check valve is an excellent choice for raw water, cooling water and treated waterwastewater applications. Titan flow controls check valves are the preferred choice for achieving automatic shutoff and preventing backflow in piping systems. Closing speed is adjustable depends on working conditions. The surgebuster check valve is a swing check valve that fully meets ansiawwa c508.
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. A basic check valve consists of a valve body, bonnet or cover, and a disc which is attached to a hinge and swings away from the valve seat to allow fluid to flow in the forward direction, as in a swing or tilting disc check valve, and returns to valve seat when upstream flow is stopped. They are suitable for use on a wide range of fluids for applications in process. The pratt tilting disc check valve is the most versatile and reliable check valve henry pratt company has to offer. Tilted disc check valves check valve mga controls ltd.
The dynamic opening force on the disc depends on the density of the medium and the. Anticipated closing limiting the intensity of the check valve shock. These check valves can be used in all non return applications. Class, ff flange, cast iron body, 304 ss disc, bunan seats, 316 ss spring. Valve is ruggedly constructed with aluminumbronze or stainless steel trim to give years of trouble free operation.
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. Nibco may substitute ductile iron astm a395 604018 or astm a536 654512 for all other astm a126 class b cast iron components. Apco slanting disc check valves frank olsen company. Wafer swing or tilting disc check valve can be manufactured with flanges on request. Valve shall contain tilteddisc design to achieve better seating characteristics. The dd plus is a versitile double disc swing check valves use spring assisted halfdiscs for up to 66 sizes. Stronger, lighter and smaller than conventional swing. Tilted disc check valves are available in a wide range of sizes from 3. The compact design features nonslam springassisted closing. Minimal forward flow will instantly open the valve disc, while zero flow closes.
Using the same valve body as the type n and with inner and outer disc diameters being the same in the two valves, the type nz provides the same internal flow profile. Our two piece body design allows for a 40% expanded cross sectional flow area, so the area. Check valve comparisons slanting disc check pivot off center slanting disc check is a unique valve fig. Disc check valves are designed to be sandwiched between flanges i. The spring return reduces noise for quiet operation. Better closing characteristics due to the smaller swing angle of the disc. Aws swing check valves require a low opening pressure. The nibco leadfree cast iron wafer style check valve is spring actuated with bunan seat. For springassisted discs, spring material shall be 316 stainless steel as standard, or hastelloy as required. The disc begins closing the valve as forward flow decreases.
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. 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. The duochek wafer valve design is generally stronger, lighter, smaller, more efficient and less expensive than conventional swing check valves. It is also available in bs, din and ss standards see catalogue sheet fk 30. This valve offers significant energy and cost savings over the life of the valve due to its. Tilted disc check valve body design ultra low headloss is the result of streamlined body contouring and 140% flow area through the seat. For springassisted discs, spring material shall be 316 stainless steel as. It could be installed in any position, for fluids in horizontal and vertical circulation, ascending or descending. Its design meets api 594 which is approximately one fourth the face to face dimension and 15% to 20% the weight, on most popular sizes, making them less expensive than a swing check valve. Disc design contoured disc provides minimum headloss and energy savings. They are especially suited for use in distribution systems and industrial plants.
Disc check valve is an advanced design which gives full flow and occupy very less space than other type of non return valve. See the valve arrangement drawing for disc clearance dimensions. A lift check valve is a check valve in which the disc, sometimes called a lift, can be lifted up off its seat by higher pressure of inlet or upstream fluid to allow flow to the outlet or downstream side. 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. The valves are used in oil lines processing line, hot and cold water systems, steam and condensa gas lines etc. The main body is made of two pieces to allow a greatly enlarged flow area through the disc.
The check valve shall be of the tilting disc type as manufactured by henry pratt company. Browse t433y check valve bronze, ptfe disc, threaded ends in the nibco catalog including material number,upc code,valve size,connection type,description,turnsoperation. But here is where the similarities to traditional swing check valves end. Series 586ct pivoting disc check valve with top mounted control the claval series 586 pivoting disc check valve provides superior flow characteristics with lower head loss than any other comparable. Cair valves cair offers disc check valve wafer type especially for chemical, food processing, pharmaceuticals, pulp and paper, textiles, power generation, refrigeration u air conditioning etc. This also available with ibr certificate in form ill c.
Hydraulically profiled disc optimising the passing of the flow. Buttweld 50 750 mm 923 tilting disc check 900 flanged 3 18 29. T433y check valve bronze, ptfe disc, threaded ends. All iron components are coated in fusion bond epoxy resin. Usually used in water pipework systems and installed immediately after the pump.
The tilted disc allows a flow area that is 40% greater than the nominal. Minimal forward flow will instantly open the valve disc, while zero flow closes the valve disc preventing backflow. Tilted disc check valves are very high performance check valves, designed for applications that display very high flow characteristics. Mueller 212 swing type gravity operated check valve flxfl maximum working pressure. When flow reduces or reverses if the pump fails then the disc. The twin disc check valve is wafer style to fit between. Disc opens in the direction of flow and returns back on body seat when flow stops and seals with seat ring against backpressure. Short disc travel from full open to full close provides the ability to close very rapidly. The check disc valve close for the spring action when reduce the line pressure, getting a mild closing and avoiding the fluid recession and the surge when it close to the zero point of pressure. An introduction to nonreturn valves and the importance of correct.
Closing time is reduced compared to the other check. Use the diagram 1 for vertical pipe and diagram 2 for horizontal pipe. 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. Disc and body seat rings leak tight seating is achieved at all working pressures by utilizing a lift and tilt action which provides.
Check valves or non return valves are designed to ensure one way flow only. Superior flow characteristics the apco slanting disc check valve, because of. Tilting disc check valves with hydraulic damper eliminate the closing slams and water hammer for entire closing stroke. Find more detail about industrial valves from,download cast and forged steel ball valve,gate valve,check valve,globe valve pdf catalog,contact us quickly. The flap rises above the flowpath reducing wear and allows for a flushing action during operation. The valve achieves full opening when the disc tilts in the flow of the media. The twin disc check valve is wafer style to fit between standard flanges. Buttweld 50 900 mm 623 tilting disc check 600 flanged 2 30 28 623. The tilting disc check valve shall consist of a circular disc with conical rim, hinged about a fixed pivot above its center.
Its design meets api 594 which is approximately one fourth the. 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. If the back flow reaches to check valve before the disc closed, the result will be slammed closing and water hammer. Valve catalogue ball valve,gate valve,check valve,butterfly. A broad range of configurations that includes piston, tilting. For additional types of check valves, please visit. Nafcheck tilting disc check valves size 224, ansi class 150 and 300, naf 526440 528661 fk 30. 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. A basic check valve consists of a valve body, bonnet or cover, and a disc which is attached to a hinge and swings away from the valve seat to allow fluid to flow in the forward direction, as in a. Series 586ct pivoting disc check valve with top mounted control the claval series 586 pivoting disc check valve provides superior flow characteristics with lower head loss than any other comparable hinged disc check valve. Type n radially guided ring disc with the type nz the ring disc is centrally guided with a single spring. The internal disc allows flow to pass forward, which opens the valve.
1127 1097 605 273 313 1112 1154 711 218 1347 266 142 1038 1230 494 1389 547 243 1581 364 613 664 839 1174 751 1348 707 469 798 834 549 830 246 598 471