The reversible shutter helps to limit leaks from the pipeline when it is under maintenance.
A reversible shutter consists of a solid shutter and a hollow which are manufactured, for the needs of the installation, in one piece. It is used as a safety device to isolate a particular section of piping or equipment when that section or equipment is to be inspected or taken out of service. It is different from a valve in that the shutter is considered a true isolation device. It helps to limit leaks from the pipeline when it is under maintenance.
Depending on the size and class of the flanges, it will be more appropriate to offer two separate components (solid shutter and hollow shutter) instead of a reversible shutter to limit weight and avoid handling heavy parts.
In normal operation, the reversible shutter is mounted in the open position so as to let the fluid flow. If maintenance is to take place, the shutter should be turned to the closed position so that the flow of fluid is stopped. This rotation can be carried out thanks to the bolts placed in the hole drilled in the connecting piece. The bolts must be loosened, some removed, and the reversible shutter will be rotated to the desired position. The seals are then changed, the bolts can be reassembled and tightened.
Technical characteristics:
- Standard: ASME B16.48.
- Installation between flanges: ISO PN 2.5 to PN 420, ASME 150# to 2500#, others on consultation.
- Materials: Standard: 304L / 316L stainless steel, others depending on your application.
- Fluid:liquid, gas, vapour.
- Diameter: according to the nominal diameter of the flange.
- Thickness: Calculated according to the rated pressure of the flange
- Working pressure: limited to the rated pressure of the flange.
- All types of faces: RF, RTJ, male or female socket.
