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PRODUCTION • PROCESSING • HANDLING


EXPERTSIN DISINFECTION


ULTRAVIOLET


Self-venting valve seats are pressed against the ball


to the process when heated without the pressure rising through the 3mm connection borehole to the process side. On top of that, there are ball valves with


trunnion ball design. In this application the balls are fixed in the direction of flow but the valve seats can move.


SELF-VENTING VALVE SEATS With the EEMUA 182 standard, venting must not take place via a borehole in the ball, but must be automatic. For this purpose, for example, self-venting valve seats are used, which are pressed against the ball by means of spring force. Te medium flows into the space around the ball. Here, too, the medium is initially blocked between the two ball seats and when heated, the pressure increases. In this case, however, due to the rising pressure, the valve seats are pushed away from the ball against the spring force, whereby the pressure can escape. Te advantage over the venting with the 3mm borehole is that the solution works bidirectionally, that is, it seals in both directions. It also works very reliably. Tere are also self-venting ball seats designed


according to the above-described floating ball principle, which can be bidirectionally sealed. Here, the venting of the trapped pressure takes place around the valve seat. However, the pressure at which the medium begins to flow past the valve seats cannot be accurately predicted here, since it depends greatly on the manufacturing tolerances. Terefore, solutions with the 3mm borehole in the ball are, in many cases, the more suitable option, as they work very reliably and are wear-resistant despite the borehole. l


DISINFECTION SEAWATER


CHEMICAL FREE UV DISINFECTION


HIGHLYEFFECTIVE,CHEMICAL FREE DISINFECTIONTECHNOLOGY FOR SEAWATER TREATMENT APPLICATIONS IN OIL&GAS SECTOR


•REDUCE /ELIMINATE CHEMICAL BIOCIDES •HIGHLYEFFECTIVE AGAINST SRB’S •TYPICAL 99.99% REDUCTION IN SINGLE PASS •FIELD PROVEN TECHNOLOGY •SUITABLE FOR UNMANNED PLATFORMS •LOWMAINTENANCE TECHNOLOGY


www.atguv.com www.engineerlive.com 27 261MM x89mm O&G Advert.indd 1 02/07/2018 16:57:45


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