1 Scope
This document specifies the requirements for the attachment of multi-turn actuators to valves.
Throughout this document, “actuator” may be understood as “actuator and/or gearbox” providing a multi-turn and/or linear output.
It specifies:
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— flange dimensions necessary for the attachment of actuators to industrial valves [see Figure 1 a)] or to intermediate supports [see Figure 1 b)];
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— those driving component dimensions of actuators which are necessary to attach them to the driven components;
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— reference values for torque and thrust for flanges having the dimensions specified in this document.
NOTE 1 In this document, the term “valve” may also be understood to include “valve with an intermediate support” [see Figure 1 b)].
NOTE 2 When a combination of a multi-turn actuator and separate multi-turn/linear gearbox is coupled to form an actuator, the multi-turn attachment to the gearbox is in accordance with this document [see Figures 1 c) and 1 d)]. A combination of a multi-turn actuator with integral multi-turn/linear gearbox supplied as an actuator is in accordance with Figures 1 a) and 1 b).
Figure 1
—
Interface between multi-turn/linear actuator and valve
| a) Direct interface |
b) Intermediate
support interface |
c) Direct interface
(when combination of a multi-turn actuator and multi- turn/linear gearbox) |
d) Intermediate support
interface (when combination of a multi- turn actuator and a multi-turn/linear gearbox) |