ISO DIS 5211

Description / Abstract: This International Standard specifies requirements for the attachment of part-turn actuators, with or without gearboxes, to industrial valves.

The attachment of part-turn actuators to control valves in accordance with the requirements of this International standard is subject to an agreement between the supplier and the purchaser.

This International standard specifies:

— flange dimensions necessary for the attachment of part-turn actuators to industrial valves [see Figures 1 a) and 1 c)] or to intermediate supports [see Figures 1 b) and 1 d)];

— driving component dimensions of part-turn actuators necessary to attach them to the driven components;

— reference values for torques for interfaces and for couplings having the dimensions specified in this International standard.

The attachment of the intermediate support to the valve is out of the scope of this International standard.

NOTE 1 In this standard the term “valve” may also be understood to include “valve with an intermediate support” [see Figure 1 b)].

NOTE 2 When the part-turn actuator is a combination of a multi-turn actuator and a gearbox, the multi-turn actuator attachment to the gearbox is in accordance with ISO 5210 [see Figures 1 c) and 1 d)].