Automatic Valves

Automatic Control Valves

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Hydro Instruments is a leader in vacuum chemical feed delivery systems. Their success can be attributed to the redesign of their chlorine auto-valve that eliminated gears and potentiometers in the drive mechanism and went to a linear stepper motor design.

Model OV-110
3000 PPD Max Capacity

  • Wall Mount Option
  • For Gas or Liquid Metering
  • Capable of operating in eight different control modes
  • Backlit liquid crystal display
  • Modbus Communication (RS-485)
  • 3 Analog Inputs (Flow, Residual, and Remote Dosage)
  • Adjustable:  Dosage, Set Points, Lag Time, Signal Filters, Display Ranges, Alarms & More
  • Two 4-20mA Outputs
  • Password protected settings

Model OV-110 Brochure
Wall Panel Brochure

Model OV-1000
Feed rates up to 10,000 PPD

  • Compatible with a variety of gas and liquid chemicals
  • Seven Control Options
  • Modbus (RS-485) communication
  • 3 Analog Inputs and 2 Analog Outputs

Model OV-1000 Brochure
Wall Panel Brochure
Wall Panel Auto Valve with 4-20mA Output Brochure

Model CV-230
Up to 10,000 Max Capacity

  • Wall Mount Option
  • Automatic feed for Chlorine, Sulfur Dioxide, Ammonia, Carbon Dioxide, Sodium Bisulfite, Sodium Hypochlorite
  • Compact, Reliable, and Simple Design
  • Wide Range of Capacities & Chemicals
  • Simple 4 Button Interface

Bulletin CV-230
Wall Panel Brochure