DOUBLE PENDULAR VALVES
Double flap valves are devices for discharging bulk materials, e.g. below conveying systems, filters or cyclones. Each one of the valve flaps arranged in tandem opens and closes alternately. This design enables a continuous discharge with simultaneous sealing. By means of different drive types, which can also be designed with overload protection, the flaps or butterflies can be adapted to customer specifications. Large maintenance openings enable cleaning and/or maintenance.
| Function | shut-off, dosing or discharging |
| Cross section | in rectangular execution |
| Design | as flanged valve or as weld-end valves |
| Number of butterflies | two arranged in tandem |
| Medium | bulk material, -50 to +800°C |
| Explosion protection | optional |
| Shaft seal | gland packing, also Clean Air Guidelines conformant /O-ring |
| Leaf seal | metallic striking / soft seal, chambered |
| Flange connection | DIN / BS / ANSI / customer specification |
| Insulation | without / internally lined / internally / prepared for on-site external insulation |
| Materials | steel / stainless steel |
| Actuation | electric / pneumatic / hydraulic / weighted, each with overload protection |
