Vacuum Conical Reducer (SUS304)

Model: PVF-08

PVF-08 is a SUS304 conical reducer used to change the diameter of vacuum piping. With a structure in which the diameter changes gradually in a cone shape between the two pipes, it is used for diameter-transition points in vacuum piping for semiconductor, display, solar, and laboratory processes.

Specifications

Frequently Asked Questions

How do conical reducers differ from step reducers?

A step reducer has a shape where two diameters change abruptly - simple in structure, but generating significant turbulence and pressure loss. A conical reducer changes diameter gradually in a cone shape, reducing flow resistance and minimizing conductance loss. In vacuum lines, conical types are recommended particularly in sections where pumping efficiency is important.

Why is piping conductance important in vacuum lines?

Piping conductance represents the gas-throughput capability of the pipe per unit time. In the high-vacuum range in particular, the actual achieved vacuum is determined by piping conductance rather than the pump's own pumping speed. As diameter decreases, conductance drops sharply, so design principles call for keeping the pump-inlet diameter as large as possible and using gradual transitions instead of abrupt steps.

Up to what size can be supplied?

Supply is available within the KF (NW) or ISO flange standard ranges with combinations of starting and ending sizes. Tell us the required inlet/outlet sizes (e.g., NW40 → NW25) and we will prepare the matching specifications.

What are the connection methods at both ends?

PVF-08 can be supplied with KF (NW) or ISO flange standards. Flanged type is general for sections requiring disassembly, while weld-neck type is used for fixed piping lines. Tell us the required fastening method together and we will prepare appropriate specifications.