How to choose the flange and gasket for a burst disc holder
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The rupture disc device is used for compressed air; the supply pressure is 1 MPa and the charging pressure is 0.01 MPa, with pressure reduction achieved by a pressure reducing valve； The rupture disc device is used to protect pressurized containers in the event of a failure in the pressure relief valve, with the discharge side being directly vented to atmosphere ； The current issues are: 1. The inner diameters of the upper and lower clamping devices are different; which type of flange should be chosen? Is it sufficient to use a standard DN40 flange? However, in that case the flange will not fit with the inner diameter of the intake end clamping device, as the latter has an inner diameter of 50, while the flange is specified for DN40. 2. For easier connection, would it be possible to use a threaded flange for the intake end? 3. The drain side flange is no longer connected to any pipelines – can any type of flange be used? 4. Is a raised face required for the sealing surface of the flange? 5. On the actual booster (there are water lines on the end faces of the lower and upper clamps, while there are no such lines on the upper clamp). Why is that? What material and type of gasket should be chosen? 5. Can metal gaskets with a nominal pressure greater than 1 MPa (flange class of 1 MPa) be used? 6. The manual states that rubber gaskets cannot be used, so can PTFE gaskets be used?
Check the applicable ranges for HG flanges, gaskets, and sealing surfaces
But I don’t know if it applies to boosters? It seems that plastic deformation occurs during use, which leads to excessive relaxation; as a result, the clamp is unable to hold the blast disc. I’m not sure which one to choose – I work in the hydraulic field and this is my first time using this product
Flanges in accordance with HG/T20592 of the Ministry of Chemical Industry can be used; based on the tool holder type you provided, it should have an RF face, and the outer diameter of the holder is generally K-L
On the actual holder, there is a water line on the end faces of the lower and upper clamps, while there is no such line on the upper clamp – this is there for sealing purposes. The water line between the clamp and the blast disc serves as the sealing line; if this line gets damaged or compressed, it is necessary to purchase a new clamp, otherwise leakage will occur