Diaphragm valves operate on a similar principle, but enable lower gas conductance values. These valves operate at high differential pressures up to over 1 bar and can be used, for example, as a 'switch' in backing-vacuum or to open a bypass into the main chamber. Another design uses a sliding elastomer ring on a piston rod (linear feedthrough) as an external seal, which allows faster switching frequency and higher gas flow at a slightly lower tightness. An edge welded bellows or hydroformed bellows allows the linear movement of the valve plate against the housing, the bellows is sealed against the housing with a static elastomer seal. Angle and Inline valves usually operate with a bellows as an external seal. Inline valves allow the valve to be installed simply instead of an intermediate piece (in a straight pipe), as the connecting flanges are opposite each other. What does the installation space look like?Īngle valves have the advantage that the gas flow is diverted only once.This first section will help you select the valve with regard to the following requirements: You will also get tips and answers to the most important questions before buying a valve. In the following passages you will get an overview of our valves types, seals and sealing mechanisms as well as actuator types. The area of application is defined, among things like the process sequence, the process temperature, the ultimate vacuum to be achieved, or the gas composition.

Pfeiffer Vacuum offers a variety of different valve types. From surface molecular contamination (SMC) to.Mass spectrometers and residual gas analysis.Fundamentals of total pressure measurement.Manipulators and mechanical feedthroughs.Integrated Leak Detection on Coating Systems.CCIT Container Closure Integrity Testing for Pharma Industry.Production Control / Quality Management.Leak testing & CCIT solutions for Pharma.

Isolation valve