Description

Bermad 350-A-4 x 4-P Plastic Double Chamber Filter Back Wash Valve

The BERMAD Model IR-4×4-350-P 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-4×4-350-P is available in Angle flow (A) and Straight flow (S) configurations.

Applications:

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

Line Pressure Driven
Double Chambered Design
- Quick and smooth mode change
- Wide application range
- Requires low actuation pressure
- Protected diaphragm
- Dynamic Sealing
- Seals at very low pressure
- Prevents seal friction and erosion
Engineered Plastic Valve Design
- Highly durable, chemical and cavitation resistant
Long Valve Travel
- Higher flow and lower head loss
- 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 servic

Operation

Angel Flow

A Hydraulic Command, which pressurizes the Upper Control Chamber, forces the Diaphragm actuated Plug Assembly to move towards the Supply Port Seat, eventually sealing it drip tight. This allows flow from the filter through the Drain Port Seat. Venting the upper control chamber causes the line pressure, together with the Spring force, to move the Valve back to filtration mode.

Straight Flow

A Hydraulic Command, which pressurizes the Lower Control Chamber, forces the Diaphragm actuated. Plug Assembly to move towards the Supply Port Seat, eventually sealing it drip tight. This allows flow from the filter through the Drain Port Seat. Venting the upper control chamber causes the line pressure, together with the Spring force, to move the Valve back to filtration mode