KR VAVLE
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| ●Valve Type: | Swing check valve | ●Structure: | Rubber flap type |
| ●Standard: | DIN F6 | ●Workmanship: | Investment casting |
| ●Sealing Direction: | Single-directional | ●Sealing Grade: | Zero leakage |
| ●Temperature: | -20°C < T < 120°C | ●Operation: | Self-starting |
NBR rubber valve disc is oil and water resistant, suitable for conventional media such as water and oil; EPDM rubber valve disc is acid and alkali resistant, aging resistant, and can be used in sewage treatment and weak acid and weak alkali medium transportation scenarios.
Made of QT450-10 and other grades of ductile iron casting, with a straight through horn mouth design for the flow channel. The inner wall is smooth and the flow area is large, which can reduce the flow resistance of the medium and avoid impurity accumulation. Main connection method is flange connection, and some small caliber models can be customized with clamp connection.
Made of nitrile rubber (NBR) or ethylene propylene diene monomer (EPDM) molded, integrated with the sealing surface of the valve seat, without hinges, shafts or other moving parts. The valve disc is umbrella shaped or petal shaped, with excellent elasticity and wear resistance. When opened, it can fully adhere to the inner wall of the valve body.
Equipped with a stainless steel limit block, it can limit the maximum opening angle of the valve disc (usually 60°~70°), prevent excessive deformation or damage of the valve disc caused by high-pressure medium impact, and ensure precise alignment when the valve disc is reset.
Standard export wooden case packaging ensures the safety of the valves during international transit.
Versatile enough for urban water supply and drainage, sewage treatment, fire protection systems, HVAC, water treatment plants and farmland irrigation, this valve excels in low-pressure, high-flow pipeline systems with media containing small quantities of impurities. It has established itself as the go-to anti-backflow valve choice for civil buildings and municipal engineering projects.
| Components Name | Material |
|---|---|
| Valve body / Valve cover | Cast iron, ductile iron, cast steel |
| Valve petal | Rubber Combination components |
| Spring | Stainless steel |
| DN (mm) | L | D | D1 | dn | n |
|---|---|---|---|---|---|
| 50 | 203 | 165 | 125 | 17.5 | 4 |
| 65 | 216 | 185 | 145 | 17.5 | 4 |
| 80 | 241 | 200 | 160 | 17.5 | 8 |
| 100 | 292 | 220 | 180 | 17.5 | 8 |
| 150 | 356 | 285 | 240 | 22 | 8 |
| 200 | 495 | 340 | 295 | 22 | 8 |
| 250 | 622 | 395 | 350 | 22 | 12 |
| 300 | 698 | 445 | 400 | 22 | 12 |
| 350 | 787 | 505 | 460 | 22 | 16 |
| 400 | 914 | 565 | 515 | 22 | 16 |
| 450 | 978 | 615 | 565 | 26 | 20 |
| 500 | 978 | 670 | 620 | 26 | 20 |
| 600 | 1295 | 780 | 725 | 30 | 20 |
The rubber flap design eliminates hinges and shafts, reducing moving parts that are prone to wear. This results in zero leakage and high reliability even in media containing impurities.
NBR is ideal for water and oil media. If your system involves sewage treatment or weak acidic/alkaline media, EPDM is recommended for its superior resistance and aging properties.
The stainless steel limit block restricts the valve disc's opening angle to 60°~70°, preventing damage from high-pressure impact and ensuring the disc returns to its position accurately.
This valve is designed to operate within a temperature range of -20°C to 120°C, making it suitable for standard industrial and municipal HVAC or water systems.
Yes, the valve body features a straight-through horn mouth design with a smooth inner wall, which significantly reduces medium flow resistance and prevents impurity accumulation.
The valve follows the DIN F6 standard for dimensions and construction, ensuring compatibility with standard industrial pipeline specifications.
