Browse catalog by:


Filter Backwash Hydraulic Valve

The BERMAD Model IR-3x3-350-I is a compact 3-port valve, in a T configuration. It is double chambered, hydraulically operated, and diaphragm actuated. Designed for automatic backwashing of filtration systems, the BERMAD Model IR-3x3-350-I is available in Angle flow (A) and Straight flow (S) configurations.

Features and Benefits

  • Line Pressure Driven
  • Double Chambered Design
    • Wide application range
    • Requires low actuation pressure
    • Protected diaphragm
  • Dynamic Sealing
    • Seals at very low pressure
    • Prevents seal friction and erosion
  • Cast Iron Body
    • Rigid construction, high stress resistance
  • Short Valve Travel
    • Smooth changes of flow direction
    • Eliminates mixing of supply and waste water
  • User- Friendly
    • Can be installed in various orientations
    • Simple in-line inspection and service

Typical Applications

  • Automatic Backwash of Filter Batteries
  • Gravel Filters
  • Sand Filters
  • Disk Filters
  • Screen Filters
  • Single Filter Autonomic Backwash System
  • Angled or Straight Installations


[1] BERMAD Model IR-3x3-350-S-I allows flow into
     the filter, and switches closed upon pressure
     rise command, thereby blocking inlet to filter and
     enabling backwash flow from the filter.
[2] BERMAD Hydrometer Model IR-900-M0
[3] BERMAD Air Valve Model ARC-A-I-P