EXPLOSION VENTING WITH STUVENT RUPTURE DISC

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1 Background The pressure increase in process equipment caused by a dust/gas explosion can be controlled if a vent installed on the equipment is opened at the right moment. In order to reduce the risks for man and environment caused by the outgoing flame jet, the explosion venting must always be done into open air and in a safe direction. Product If location and environment allow, a traditional rupture disc - a thin metal membrane that opens at a specified pressure - is a simple and a very economical solution. Explosion venting with a STUVENT rupture disc A STUVENT rupture disc has important advantages: Suitable both for dust and gas explosions 100% efficiency Usable with underpressure and overpressure depending on type Smooth interior surface eliminates 'dead corners' Integrated gasket for simple and fast mounting Construction is such that projections at opening are avoided The STUVENT rupture disc is an ATEX safety system for the venting of explosion pressure. Its efficient functioning as a safety system depends on the right venting area and correct positioning on the process equipment. See also EN Functioning Explosion venting The STUVENT rupture disc is remarkably simple: when the preset opening pressure is exceeded, the disc opens on the three pre-cut sides. The fourth side is not pre-cut to avoid it flying away. Signalling The STUVENT rupture disc can optionally be equipped with a rupture sensor. In addition to its use as a break sensor for rupture discs, the EBS is also widely used as an interlock switch. The advantages of the EBS sensor are countless: Very simple and quick installation No false alarms, unlike classical break wires Functionality can be tested without disassembling or switching off Detects rupture discs that have opened to the outside as well as rupture discs that have been sucked in Not integrated with the rupture disc, therefore not only universally applicable, but the EBS also fits every rupture disk or explosion door already installed (regardless of brand) ATEX certified for dust and gas Ex zones /C5 -

2 System description The STUVENT rupture disc is available in both round and rectangular form. Depending on the application, the rupture discs can be supplied in various models: - Type GE Type KER Type KEW EBS - Sensor Type KE: if only relatively small pressure variations are present, a simple flat rupture disc is sufficient. Type KER: to facilitate mounting, the KE can also be supplied with reinforced edges for mounting without a counter-frame. Type KEW: for mounting on curved surfaces (such as a silo wall), curved rupture discs with a specific radius can be supplied. Type GE: in the case of large pressure changes and/or significant underpressure, it is advisable to install a convex rupture disc. Depending on the size and the model, the GE type can be used up to an absolute vacuum. Various process conditions The STUVENT rupture disc can be used for dust, gas and hybrid mixtures. For processes with both overpressure and vacuum. The STUVENT rupture disc is made of stainless steel. Various gaskets are available: for high temperatures, for food and hygienic environments and with FDA approval. To avoid problems with condensation, an insulation layer up to 100 mm thick can be applied to all disc types. Various installation conditions Installation is possible in all positions. Intended use This product is an ATEX certified safety system. Consequently, any application must be based on the instructions contained in the ATEX certificate, the product specifications and the user manual. Technical specifications For further details, we refer to the technical datasheet. StuvEx retains the right to make changes without prior notice.

3 Characteristics Type GE KE KER KEW Product Kind of product Organic dust Gas IIA / II B Kst max 250 bar.m.s -1 Kg max 100 bar.m.s -1 Application Underpressure bar 0.05 bar 0.05 bar 0.02 bar processes Admissible EPDM: -40 C up to +120 C temperature range Silicone: -50 C up to +200 C Kligerit: -100 C up to +400 C Type and availability Shape Convex Flat Flat Curved Opening pressure 0.1 bar 20 C Tolerance on Pstat 10% 20% 20% 20% Pressure peak up to 70% of pstat 50% of pstat 40% of pstat 40% of pstat Material SS 304 or SS 316 Sealing EPDM, Silicone or Klingerit Delivery Pre-assembled, seal and possible isolation included. Construction One piece Flanges All types: according to the manufacturers specifications (fixing holes included) Only round discs: installation between flanges DIN2632 (without holes) Installation Installation with Yes Yes No Yes counter flange Positioning In open air or, if allowed, through a vent duct Montage In all positions ATEX Certificate FSA 03 ATEX 1508X ATEX Markings As a safety system II GD Functionality Reconditioning The rupture disc is simply replaced after activation Options Sensor EBS (proximity switch) or SE (breaking sensor) Insulation 40 mm, 60 mm, 80 mm or 100 mm Earth connection Joggle with bolt hole Counter frame Yes Yes No Yes Other opening 0.2 or 0.5 bar pressures Material certificate Certificate 3.1.B - 1/ /T5

4 This document provides an overview of the product's characteristics and possibilities. These are not necessarily part of the standard version and may not always be realised together. A detailed offer will be made for each specific application. Measurements of rectangular rupture discs - Interior (mm) Exterior (mm) Venting area (cm 2 ) Measurements available for type GE KER KE KE-W 110 x x x x 229 x x x x x 205 x x x x x 229 x x x x x 150 x x x x x x 220 x x x x x 315 x x x 340 x x x x x 305 x x x x x 247 x x x x x x 340 x x x x x 400 x x x 410 x x x x 300 x x x 300 x x x x x 319 x x x x x 490 x x x x x 375 x x x x x x 390 x x x x x 445 x x x x x 470 x x x x x x 490 x x x x x x 525 x x x x x x 600 x x x 610 x x x x x x 247 x x x x x 457 x x x x x x 645 x x x x x x 653 x x x x x x 669 x x x x x 630 x x x x 620 x x x 586 x x x x x x 500 x x x x x x 420 x x x x 629 x x x x x 800 x x x 500 x x x x 610 x x x x x x 920 x x x x x x 940 x x x 970 x x x x x 915 x x x x x x 1000 x x x 1000 x x x x x 1020 x x x x x 790 x x x x x 1130 x x x x x x 920 x x x x x 940 x x x 1130 x x x x x 1000 x x x x x StuvEx retains the right to make changes without prior notice.

5 Measurements of round rupture discs Measurements only available for the type GE DN Interior (mm) Exterior (mm) Venting area (cm 2 ) A StuvEx product specialist is at your disposal for advice and comprehensive documentation. - 2/ /T5