How to Measure a V-Band Clamp

A V-band clamp is sized from the flange it closes, not from the inside of the pipe and not from the outside of the band. The figure buyers usually need is the flange outside diameter where the band seats. Measuring the pipe bore, or the outer shell of an old clamp, orders the wrong part.

If a clamp is already fitted, measure across the flange faces that sit inside the V, from outside edge to outside edge. Note whether the joint uses a male-female flange pair and whether the latch must open for regular service. A drawing is better than a single number: it shows the taper the band has to match.

OEM Clamps V-band models such as VTB, VBC and the flanged VBK kit cover exhaust, turbocharger and DPF joints. Send the flange diameter, peak temperature and how often the joint is opened. Those three points decide the band and the latch.