ISO 12490:2011 石油および天然ガス産業—パイプラインバルブ用のアクチュエータおよび取り付けキットの機械的完全性とサイジング | ページ 6

4.1

actuator

electrically, pneumatically or hydraulically powered device bolted or otherwise attached to the valve for the purpose of applying torque or thrust to open and close a valve

4.2

actuator, linear

actuator that transmits thrust to the valve for a defined linear stroke

4.3

actuator, multi-turn

actuator that transmits torque to the valve for a rotation of more than one revolution

4.4

actuator, part-turn

actuator that transmits torque to the valve for a rotation of one revolution or less

4.5

breakaway thrust

breakaway torque

maximum thrust or torque required to operate a valve at maximum pressure differential

[SOURCE:ISO 14313]

4.6

by agreement

agreed between the manufacturer and/or supplier and/or purchaser

4.7

coupling

driven component (drive adapter, drive tube, drive shaft) that allows transmission of torque and/or thrust from an actuator driving component to the valve shaft/stem

4.8

cycle

continuous movement of the valve obturator from the fully closed position to the fully open position and back to the fully closed position, or vice versa

4.9

drive train

all parts of a valve drive between the operator and the obturator, including the obturator but excluding the operator

[SOURCE:ISO 14313]

4.10

intermediate support

mechanical component (bracket, spool, adapter flange) that allows the attachment between a valve and actuator

4.11

mechanically loaded parts

actuator parts that are designed to provide the generation and/or transmission of torque or thrust

4.12

maximum allowable stem torque/thrust

MAST

maximum torque/thrust that it is permissible to apply to the valve drive train without risk of damage, as defined by the valve manufacturer/supplier

4.13

mounting kit

components that may be comprised of combinations of the following: intermediate support, coupling, drive key(s), dowel pin and bolting

4.14

pitch circle diameter

PCD

diameter of a circle on which a pattern of holes, either threaded or through-machined, is arranged, commonly used for the purpose of fastening two mating components together

4.15

pressure-containing parts

parts whose failure to function as intended results in a release of contained fluid into the environment

[SOURCE:ISO 14313]

4.16

pressure, design

pressure defined for the design of the actuator pressure-containing parts, as defined by the actuator manufacturer

4.17

pressure, maximum operating

maximum available pressure to supply at the actuator pressure port, as defined by the actuator manufacturer/supplier

Note 1 to entry: This is the pressure that generates the torque/thrust used to design the mounting kit.

4.18

pressure, maximum rated

maximum pressure permissible in the pressure-containing parts in their normal operating condition and which is used to generate design torque/thrust

Note 1 to entry: This is the pressure that generates the torque/thrust and is used to design the mechanically loaded parts of the actuator.

4.19

pressure, maximum supply

maximum available pressure to supply at the actuator, as defined by the purchaser

4.20

pressure, minimum operating

minimum required pressure to supply at the actuator pressure port, as defined by the actuator manufacturer/supplier

4.21

pressure, minimum supply

minimum available pressure to supply at the actuator, as defined by the purchaser

4.22

reduced stroke actuator

actuator with suitable travel stops that can be used to provide a movement to a predetermined position within the actuator stroke

4.23

stall torque

maximum torque/thrust that an electric actuator develops when the motor is energised and the output drive is locked

Note 1 to entry: This is the torque used to design the mechanically loaded parts of the actuator.

4.24

stem

part that connects the obturator to the operator and which can consist of one or more components

[SOURCE:ISO 14313]

4.25

stroke

movement of the valve obturator from the fully closed position to the fully open position, or vice versa

4.26

supplier

manufacturer or third-party supplier of the actuator or the actuated valve assembly

4.27

temperature, maximum design

maximum temperature at which the actuator is capable of operating, as defined by the actuator manufacturer

4.28

temperature, maximum operating

maximum temperature at which the actuator is required to operate, as defined by the purchaser

Note 1 to entry: Operating temperature can be influenced by ambient temperature.

4.29

temperature, minimum design

minimum temperature at which the actuator is capable of operating, as defined by the actuator manufacturer

4.30

temperature, minimum operating

minimum temperature at which the actuator is required to operate, as defined by the purchaser

Note 1 to entry: Operating temperature can be influenced by ambient temperature.

4.31

torque/thrust, design

highest torque/thrust of an actuator at maximum spring force, maximum supply voltage, or maximum rated pressure with torque/thrust-limiting or pressure-reducing protection devices de-activated, which is used to design mechanically loaded parts

4.32

torque/thrust, maximum

highest torque/thrust of an actuator at specified voltage/pressure with torque/thrust-limiting or pressure-reducing protection devices active, which is used for the design of the mounting kit

4.33

unless otherwise agreed

requirements of the standard shall apply, unless the manufacturer and purchaser agree on a deviation

[SOURCE:ISO 14313]

4.34

unless otherwise specified

requirements of the standard shall apply, unless the purchaser specifies otherwise

[SOURCE:ISO 14313]

4.35

voltage, maximum supply

maximum available voltage to be supplied at the actuator

Note 1 to entry: This is the voltage used to design the mechanically loaded parts.

4.36

voltage, minimum supply

minimum available voltage to be supplied at the actuator