Standard

AWWA C541

Publisert

Merknad: Denne standarden har en ny utgave: AWWA C541

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Omfang

This standard describes hydraulic and pneumatic linear and quarter-turn actuators for operation of valves and slide gates in utility systems. Actuator types. Actuators described in this standard consist of the following types (Figure 1): 1. Linear actuators producing a linear (push–pull) motion. 2. Quarter-turn actuators producing a rotary motion. a. Cylinder with link and lever mechanism. b. Cylinder with scotch yoke mechanism. c. Rack and pinion actuator. d. Vane actuator. Actuator function. Actuators shall produce a rotary torque or linear thrust to actuate a valve or slide gate in open–close, throttling, or modulating service. Excluded actuators. Electric-motor actuators are not included in this standard. Other exclusions. This standard does not include the following: 1. Piping, controls, and positioners for actuators. 2. The mechanism connecting an actuator to a valve or slide gate. Purpose The purpose of this standard is to define the minimum requirements for hydraulic and pneumatic cylinder, pneumatic rack and pinion, and pneumatic vane-type actuators for valves and slide gates, including sizing considerations, design, verification, delivery, handling, and storage.

Dokumentinformasjon

  • Standard fra AWWA_AC
  • Publisert:
  • Versjon: 0
  • Varetype: IS