ISO 5211 pdf download

ISO 5211 pdf download.Industrial valves — Part-turn actuator attachment 1 Scope This European 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 is in accordance with the requirements of this standard only when subject to an agreement between the supplier and the purchaser. This standard specifies : – flange dimensions necessary for the attachment of part-turn actuators to industrial valves (see Figure 1a) or to intermediate supports (see Figure 1b) ; – 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 standard. The attachment of the intermediate support to the valve is not the subject of this standard. NOTE 1 In this standard the term “valve” may also be understood to include “valve with an intermediate support” (see Figure 1). 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 should be in accordance with EN ISO 5210. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European standard only when incorporate in it by amendments or revision. For undated references, the latest edition of the publication referred to applies (including amendments). ISO 273, Fasteners – Clearance holes forbolts and screws. ISO/TR 773, Rectangularorsquare parallel keys and theircorresponding keyways (dimensions in millimetres). 3 Terms and definitions For the purposes of this European Standard, the following terms and definitions apply : 3.1 actuator any power operated device used to operate a valve. The device is designed to operate using motive energy which may be electrical, pneumatic, hydraulic, etc., or a combination of these. Movement is limited by travel, torque or thrust 3.2 part-turn actuator actuator which transmits torque to the valve for a rotation of one revolution or less. It does not have to be capable of withstanding axial thrust 3.3 gearbox any mechanism designed to reduce the torque required to operate a valve 3.4 torque turning moment transmitted through the mounting flanges and connection components. It is expressed in...