BS EN ISO 22109:2020 pdf download.Industrial valves - Gearbox for valves.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 5210, Industrial valves — Multi-turn valve actuator attachments
ISO 5211, Industrial valves — Part-turn actuator attachments
I EC 60529. Degrees of protection provided by enclosures (IP Code)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:/Jwww.iso.orglobp
— IEC Electropedia: available at http://www.e1ectropediorg/
3.1
gearbox
self-contained gear unit for torque/thrust/speed/orientation change that can be manually operated by handwheel/lever and/or automated with an actuator
3.2
ambient temperature
temperature of the environment surrounding the gearbox (j)
3.3
end of travel
predefined position related to a fully open or a fully closed condition
3.4
end stop
mechanical device designed to stop the gearbox (31) drive train movement
3.5
endurance
lifetime without failure at specified conditions and tested by the type test
3.8
rated thrust
maximum thrust for linear output actuators, available for valve operation, as stated by the manufacturer or maximum thrust for multi-turn output actuators, the actuator can withstand as stated by the manufacturer
ISOURCE: Iso 22153:2020, 3.71
4 Classification
4.1 General
Gearboxes are classified per kind for operation and rotation and/or linear movement as detailed in 42and4.
4.2 Kind of operation
There are three kinds of operation:
— manual: gearbox designed for manual operation only, typically this has only one input, normally by a handwheel;
— automated: gearbox designed for automated operation, typically this has only one input, normally by an actuator for example according to ISO 22153
— manual override: gearbox designed for overriding automated operation, typically this has two inputs. The primary input is normally an actuator. The secondary input is normally by a handwheel. The secondary input is normally disengaged when the gearbox is being used in automated mode and is engaged when manual operation is required, e.g. on loss of power.
4.3 Kind of rotation
There are two kinds of rotation:
— part-turn: gearbox which transmits torque to the valve for a rotation of less than one revolution;
— multi-turn: gearbox which transmits torque for a rotation of at least one revolution and may be capable of withstanding thrust to the valve.
5 Design requirements
5.1 Endurance
The basic design requirements for automated gearboxes duty classification are given in Table 1.BS EN ISO 22109 pdf download.