PRESSURE RELIEVING BUTTERFLY VALVES
Pressure relieving butterfly valves are automatic opening or closing safety devices. Designed for applications where the butterfly valve protects industrial facilities against over and under-pressure.
| Function | pressure relief |
| Cross section | in circular or rectangular execution |
| Design | as flanged valve |
| Number of leafs | single leaf |
| Medium | gaseous, pressure range to 10 bar, temperature range -50 to +800°C |
| Explosion | optional |
| Shaft seal | gland packing, also Clean Air Guidelines conformant /O-ring |
| Leaf seal | metallic striking / soft seal, chambered |
| Flange connection | to DIN / BS / ANSI / customer specification |
| Insulation | without / internally lined / internally clad with fibre insulation / prepared for on-site external insulation |
| Materials | steel / stainless steel |
| Actuation | Actuation opens or closes automatically, spring or weighted |
