Shut Off and Control Valves
This type of butterfly, also called damper valve, has repeatedly proven itself due to its simple and robust design. Multiple leaf variants are described under multi-leaf dampers. By means of various options, this valve is able to fulfil different functions or can be adapted respectively to different operating conditions.
| Function | shut-off, control or throttling, or a combination of all | |
| Cross section | in circular or rectangular execution | |
| Design | as flanged valve, as sandwich valve for clamping between flanges or as weld-end valves | |
| Flange connection | to DIN / BS / ANSI / customer specification | |
| Number of leafs | single leaf, multiple leaf valves are designated multi-leaf dampers | |
| Medium | gaseous, pressure range to 10 bar, temperature range -50 to +1200°C | |
| Explosion protection | optional | |
| Shaft seal | gland packing, also Clean Air Guidelines conformant /O-ring | |
| Leaf seal | without (sweeping) / metallic striking / soft seal, chambered | |
| Insulation | without / internally lined / internally clad with fibre insulation / prepared for on-site external insulation | |
| Materials | steel / stainless steel | |
| Actuation | electric / pneumatic / hydraulic / hand lever / also with emergency actuation in the case of power failure |
