Check the listing for details. Gemü 630 25D7711412/N DN25 Pneumatically Driven Diaphragm Valve. Condition: Used. Listed at 128.11 USD. The externally controlled 2/2-way valves GEMÜ 630 have a low-maintenance piston drive that can be controlled with Allen neutral, gaseous media. The valves have an integrated optical position indicator as standard. The control functions “spring force closed”, “spring force opened” and With our experience from three decades in the industrial retail trade, we know what is important: Reliability, quality and technical know-how. Our goal is to make high-quality industrial goods available to you at fair conditions - regardless of whether they are tried and tested used goods or modern new components. Please send us the number and the exact company data immediately after purchase via the eBay messaging system. We carry out a qualified check of the VAT ID number. to ensure that it matches.