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  • [PRE TORQUED HOLDER DISCS]
  • [PRE TORQUED HOLDER DISCS]
  • [PRE TORQUED HOLDER DISCS]
  • [PRE TORQUED HOLDER DISCS]

PRE TORQUED HOLDER DISCS

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MARSTON Pre Torqued Holder Bursting Discs
The bursting disc holder can have a significant effect on the performance of a bursting disc. The holder provides an accurate location, sealing face, vent bore size and form.

MARSTON Pre Torqued Holder Bursting Discs
Generally, holders will be manufactured from stainless steel, though other materials can be supplied when required. Holders are normally non-torque sensitive. Marston provide holders specifically designed for each disc type, and to fit the particular application. Usually the holder will be an insert type; one that fits within the flange bolt circle. This provides an easier method of fitting replacement bursting discs since fewer flange bolts need to be removed.
Holders usually consist of two annular rings that provide a flat sealing flange for the bursting disc. Consequently, the performance of the disc should be unaffected by excessive flange bolt loading. (Certain graphite assemblies require close control of the flange bolt torque.) Most holders are supplied with assembly screws .Pre-torque holders are tightened to pre-set values to ensure an adequate joint is achieved between the disc and holder before installing onto the plant.

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