KNF gas process pumps with integrated, leak tight safety diaphragm system are the ideal solution for safely transporting hazardous, toxic, rare or costly gases. The redundant, secondary diaphragm ensures ultra-low leak rates of <6 x 10-6 L/sec, and effectively creates a safeguard to contain gases without risk of escape. Additionally, the system prevents contamination from external influences.
Leak tight, double diaphragm gas pumps are particularly well-suited for many applications within the field of physics such as: emissions sampling and monitoring, analytical instruments, nuclear, chemical, or process engineering applications. Additional physics analysis applications include: cryostats, pulse tube and dilution refrigeration, and helium liquefiers.
The unique double diaphragm design pairs a "safety" diaphragm with an elastic "working" diaphragm held securely at the edges. An eccentric and a connecting rod move both diaphragms up and down, at their center, and the "working" membrane transfers the gas through automatic valves. Both diaphragms enclose a pressure- and vacuum-tight intermediate safety space that can be monitored for pressure changes, and serves to prevent contamination. Combined with additional head machining and sealing rings, the double diaphragm system can dramatically enhance gas tightness.