Bermad - 350 Series - Filter Backwash - Hydraulic Valve

The BERMAD Model IR-2x2-350 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-2x2-350-P is available in Angle flow (A) and Straight flow (S) configurations.

Features & 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
• Engineered Plastic Valve Design
  • Highly durable, chemical and cavitation resistant
• Short Valve Travel
  • Smooth changes in flow direction
  • Eliminates mixing of supply and wastewater
• User- Friendly
  • Can be installed in various orientations
  • Simple in-line inspection and service

Typical Applications

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

[1] BERMAD Model IR-2x2-350-A-P allows flow into the filter, switches closed upon pressure rise command blocking inlet to filter, and enables backwash flow from the filter.

[2] BERMAD Backwash Flow Control Valve Model IR-470-beKU

[3] BERMAD Water meter Model WPH

[4] BERMAD Air Valve Model ARA-A-P-P

Operation (Straight Flow)

A Hydraulic Command [1], which pressurizes the Lower Control Chamber [2], forces the Diaphragm [3] actuated Plug Assembly [4] to move towards the Supply Port Seat [5], eventually sealing it drip tight. This allows flow from the filter through the Drain Port Seat [6]. Venting the upper control chamber causes the line pressure, together with the Spring [7] force, to move the Valve back to filtration mode.

Operation (Angle Flow)

A Hydraulic Command [1], which pressurizes the Upper Control Chamber [2], forces the Diaphragm [3] actuated Plug Assembly [4] to move towards the Supply Port Seat [5], eventually sealing it drip tight. This allows flow from the filter through the Drain Port Seat [6]. Venting the upper control chamber causes the line pressure, together with the Spring [7] force, to move the Valve back to filtration mode.

Materials

Valve Body, Separating Partition & Lower Adaptor

• Polyamide 6 – 30GF Black

Cover

• Polyamide 6 – 30GF
• Angle Flow: Black
• Straight Flow: Gray

Diaphragm

• NR-AL52 Nylon Fabric Reinforced

Seats, Diaphragm Washers

• Brass

Plug, Plug Washer

• Acetal Copolymer Black

Stopper Disk

• PVC-U

Seal, O-Rings

• NBR

Spring

• Stainless Steel AISI 302

Shaft

• Stainless Steel AISI 303

External Bolts, Studs, Nuts & Disks

• Stainless Steel

Control Chamber Displacement Volume

• Control Chamber Displacement Volume:

Operating Pressure

• 0.7-10 bar; 10-145 psi

External Operating Pressure

• 85%-100% of operating pressure

Maximum Temperature

• 65°C;150°F

End Connections

• Threaded, Grooved (with adaptors)

Flow Patterns

• Angled Flow, Reverse Angled Flow, Straight Flow, Reverse Straight Flow

Hydraulic data