Bermad IR-450-80-XZ Level Control Valve



Bermad IR-450-80-XZ Level Control Valve

The Bermad Model IR-450-80-XZ Level Control Valve with Altitude Pilot is a hydraulically operated, diaphragm actuated control valve. The valve hydraulically shuts at preset reservoir high level and fully opens in response to an approximately one-meter (three-foot) level drop, as sensed by the 3-way altitude pilot mounted on the main valve.


  • High Level Reservoirs and Water Towers
  • Unavailable Power Supply Locations
  • Low Supply Pressure Systems
  • Low Noise Generation Requirements
  • Energy Cost-Critical Systems
  • Systems with Poor Water Quality
  • Level Sustaining at Reservoir Outlet


  • Line Pressure Driven, Hydraulically Controlled
  • Bi-Level Altitude Pilot
    • No float, simple installation
    • On/Off service
    • No cavitation damage
    • Suitable for low quality water
  • Advanced Globe Hydro-Efficient Design
    • Unobstructed flow path
    • Single moving part
    • High flow capacity
  • Fully Supported & Balanced Diaphragm
    • Requires low opening and actuation pressure
    • Progressively restrains valve closing
    • Prevents diaphragm distortion
  • User Friendly Design
    • Easy level setting
    • Simple in-line inspection and service



The Altitude Pilot senses the static head of the reservoir level via a Tube connected to a “still point” at the bottom of the reservoir. Should level rise to pilot setting, the pilot directs line pressure to pressurize the Control Chamber shutting off the Valve. Should level fall approximately 1m (3 ft) below setting, the pilot vents the control chamber causing the Valve to fully open. For 8” valves and larger, a 3-Way Hydraulic Relay Valve quickens Valve response. The Manual Selector enables local manual closing.


Bermad IR-450-80-XZ Level Control Valve Bermad IR-450-80-XZ Level Control Valve Brochure