Diaphragm valve PPDV

pneumaticpurgefor chromatography

The first purged diaphragm valve was introduced over a decade ago. Despite it offering a variety of benefits, the technology’s main disadvantage was that a separate purged flow path was necessary. This meant integration costs, carrier flow consumption costs and manufacturing complexity. Our Purged Pulse Diaphragm Valve (PPDV) changed all that. Using the static purge principle to purge the valve’s inner volume through the actuation gas, it works for applications that require the features of a diaphragm valve as well as when better performance is needed from existing applications without design changes. Features Static purge design: – Minimizes purge gas consumption, reduces operation costs (especially when helium is used) – No extra plumbing hardware required to supply the purge gas, reducing overall integration cost – Always keeps inert atmosphere inside the valve New plunger design improves diaphragm lifetime Long-term storage pressure relief: Eliminates diaphragm deformation when the valve is at rest Switching valve available as 6 and 10 ports Operating temperature: 100 ⁰C Typical applications Ultra-trace permanent gas Ultra-trace sulfur VOC Hydrocarbon Any gas chromatography applications Models 6 ports 10 ports Technology Static purge principle The system is based on a static purge system that substantially reduces purge gas flow consumption by successive dilution instead of a dynamic (continuous flow) purge concept. This typically results in only 5% of the purge flow consumption compared to a standard purge valve