Cutting Ring Compression Ferrule Standard Assembly Design Dimensions

DIN 3861 / ISO 8434-1 STANDARD CUTTING RING AND COMPRESSION RING

DIN 3861 applies to cutting rings as specified for solderless tube fittings with cutting ring DIN 2353 are required and defines the designs for these cutting rings, This document supplements DIN EN ISO 8434-1:2008-02 with dimensions and details not specified there.

The design does not have to correspond to the illustration in Figure 1; only the dimensions given in Table 1 must be observed.

a. The shape of the cutting edge for form A and the cutting edge for form B is left to the manufacturer. The manufacturer must However, make sure that the nominal pressures specified in the standard are complied with with a fourfold certainty, see also DIN 3859-1, DIN 3859-2 and DIN EN ISO 19879.
b. The design of the transition area is left to the manufacturer

An interchangeability of the cutting rings of form A (with one cutting edge) and form B (with two cutting) is given with rotational path-related assembly, see DIN 3859-2.

In the case of assembly that is not related to the rotational path, the special assembly instructions of the respective manufacturer apply note

Designation of a cutting ring form A of the light series (L) for a pipe outside diameter of 15 mm made of steel (st).

DIN 3861AL15-St

If there is no specification of the form in the designation of the standardized part in the available documents, this also applies Consideration of previous editions of the standard for single-edged ring form A.

Form B is to be preferred for new designs.

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