During a process, the flowing medium mechanically holds the flap gate open. The aperture angle is defined by a combination of the medium’s flow speed and the closing pressure of the flap gate. To achieve an optimal seal, a degree of positive pressure is required on the nominally downstream side of the valve.
| nominal diameter |
inlet | outlet |
| DN 65-500mm / 2.5"-20" | DN 65-500mm / 2.5"-20" | |
| pressure class |
PN: 63-640 / 300-2500lbs |
|
| material | cast: 1.0619 - 1.5419 - 1.7357 - 1.7706 forged steel: 1.5419 - 1.7335 - 1.7380 - 1.6368 - 1.4903 - 1.4901 |
|
| piping connection |
welding ends or according customer specification |
|
| body | cast: with bolted bonnet forged steel: pressure seal |
|