Electric regulating valve national standard

National standard for electric control valve (selection)
  JB/T 7387 —— 94 Electric control valves for industrial process control systems
  1. Subject content and scope of application
  This standard is applicable to all kinds of electric control valves (hereinafter referred to as control valves) composed of electric actuators and valves that meet the requirements of GB11922. The matching servo amplifier and manipulator shall also comply with the regulations in GB 11922.
  4. Product classification
  4.1 Form
  4.1.1 According to the mode of action
  a. Straight stroke control valve
  b. Quarter-turn control valve
  4.1.2 According to the adjustment function, it is divided into
  a. Modulating control valve
  b. Shut-off control valve
  4.1.1 Classified by control method
  a. Electric closing control valve
  b. Electric open control valve
  4..1.4 According to the protection method, it is divided into
  a. Ordinary type
  b. Dustproof type
  c. Explosion-proof type
  d. Waterproof type

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