A check valve or non-return valve which normally allows to flow through it in only one direction.
Check valves are two-port valves, means they have two openings in the body, one for fluid to enter and the other for fluid to leave. There are various types of check valves used in a wide variety of applications. Although they are available in a wide range of sizes and costs, Check valves work automatically and most are not controlled An important concept in check valves is the cracking pressure which is the minimum upstream pressure at which the valve will operate.
A swing check valve or tilting disc check valve is 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 to allow forward flow.
A lift-check valve is a check valve in which the disc, can be lifted up off its seat by higher pressure of inlet or upstream fluid to allow flow to the outlet or downstream side. A guide keeps motion of the disc on a vertical line, so the valve can later reseat properly. When the pressure is no longer higher, gravity or higher downstream pressure will cause the disc to lower onto its seat, shutting the valve to stop reverse flow.
The flow can only go in one direction through a wafer check valve. The disc in a check valve, also known as a swivelling disc, swings onto the seat to stop backflow and off the seat to let flow through. This is accomplished with the use of a hinge or trunnion. Our provided wafer check valve is of the highest quality wafer check valve that is a must-buy for you. Al Dossary Valve ensures that its products will meet or surpass the standards of many different markets by employing only the highest quality components.
At Al Dossary Valve, we make high-quality wafer check valve that has several unique qualities. A lift-check valve allows fluid to pass through it when the inlet pressure is greater than the output pressure. The disc is rotated about a vertical axis to allow for a correct reseating of the valve. The disc falls onto its seat and the valve closes when the pressure upstream decreases, preventing backflow. Not only are our wafer check valves extremely practical, but they are also available in a wide range of sizes, prices, and configurations, and they operate automatically and without human intervention. Our upstream cracking pressure is the lowest pressure required to open our check valve.
To ensure the quality of the finished products, as one of the best wafer check valve manufacturers, our skilled engineers provided great consideration to every step of production. The products are well-made and aesthetically pleasing. Because of these and other enhancements, we are now widely recognized as one of Kingdom of Saudi Arabia premier suppliers of wafer check valves.
When it comes to quality, no one beats Al Dossary Valve. We go above and beyond to ensure that our customers receive the best wafer check valves on the market. Our product has several applications and benefits, such as its high-pressure resistance and minimal maintenance costs. We spent many long hours with an experienced team designing a wafer check valve that can be applied in many different contexts with little to no adjustment. As one of the industry’s premier wafer check valve suppliers, we take every precaution during production to guarantee that our products will endure the toughest conditions with minimal intervention from the user over their long service lives.
To ensure that we continue to be the preferred provider of wafer type check valve manufacturers in Kingdom of Saudi Arabia, we inspect each and every unit for defects in construction, materials, and workmanship. In addition to improving their performance in a variety of contexts, our wafer check valves are built with sustainability and safety in mind. As time passes, the strength and durability of the high-quality steel they are made from will only increase. We produce wafer check valves and cater to our customer’s unique requirements by offering a wide range of tailored services.
| MANUFACTURING STANDARDS | |
|---|---|
| Design | Api 6d / Api 594 / Asme b 16.34 |
| Face to face | Api 6d / Api 594 |
| Testing | Api 6d / aAi 598 |
| Material | ASTM specifications |
| Trims | Soft seat for tight shut-off. |
| Optional | ASTM Specifications |
| Trims | Varieties of combinations. Lesser weight, smaller size and lesser force to open. |
| Optional | Replacement of conventional check valves without pipeline modification. |
The product designs are in accordance to ANSI B16.34 / BS1868 / IBR with reliable sealing & sturdy construction to ensure excellent performance.
Suitable for the horizontal & vertical pipe runs.
“NON-SLAM” arrangement i.e. Dash Pot arrangement can be provided.
Pressure sealed bonnet for ANSI#900 and above to provide excellent sealing against increased line pressure.
Full range of Body / Cover / Bonnet & Trim material.
Valves are available in both Flange End & Butt Weld ends.
| MATERIAL | |||||
|---|---|---|---|---|---|
| S.NO. | Description | Wcb | C5 | Lcb | Cf8m |
| 1 | Body | A 216 gr. Wcb | A 217 gr. C5 | A 352 gr. Lcb | A 351 gr. Cf8m |
| 2 | Seat ring | Wcb + 13% cr. Seel | Wcb + 13% cr. Seel | A 352 gr. Lcb+ss304 | A 351 gr. Cf8m |
| 3 | Soft seated ring | Epdm / nitrile vition / neoprene | Epdm / nitrile vition / neoprene | Epdm / nitrile vition / neoprene | Epdm / nitrile vition / neoprene |
| 4 | Disc | A 217 gr. Ca15 | A 217 gr. Ca15 | A 352gr. Lcb+ss304 | A 351 gr. Cf8m |
| 5 | Spring | Ss304 / inconel | Ss304 / inconel | Ss304 / inconel | Ss316 / inconel |
| 6 | Hinge | A 216 gr. Wcb/ a 217 gr. Ca15 | A 217 gr. C5/ a 217 gr. Ca15 | A 351 gr. Cf8/ a 352 gr. Lcb | A 351 gr. Cf8m |
| 7 | Flange seal | Epdm / nitrile vition / neoprene | Epdm / nitrile vition / neoprene | Epdm / nitrile vition / neoprene | |
| 8 | Stem shaft / hinge pin | A 276 tp 410 | A 276 tp 410 | A 276 tp 304 | A 276 tp 316 |