This product is related to this category:


Bermad Model 405 - General Information

The 400 Series is designed for agricultural irrigation. The patented and design-registered 400 Series represents the cutting edge of control valve technology. This diaphragm-actuated family of valves blends simple, dependable construction with superior performance for versatility in a range of water control applications in irrigation and waterworks systems.


IR - 400 Basic Valve

The basic Mode IR-400 diaphragm actuated hydraulically operated valve is at the leading edge of a control valve design. It combines simple and reliable construction with superior performance, while at the same time being virtually free of the typical limitations associated with other single chambered valves. These automatic water control valves are designed for vertical or horizontal installation and are available in diameter sizes of 2-16"; DN50-DN400, in a wide range of materials and end connections

The design of the IR-400 valve body includes a full bore seat with unobstructed flow path, free of any in-line ribs, supporting cage, or shafts.

The unique hydro-dynamic glove design provides high flow capabilities with minimum head loss. The cover is removable via (4) fastening bolts (up to 10") for quick in-line inspection and service. The internal design of the IR-400 valve is based on innovative technology using advanced rubber-based materials to achieve a solid, one piece elastomeric assembly including a flexible fabric reinforced diaphragm, vulcanized with a rugged radial seal disk.

The diaphragm is carefully balanced and peripherally supported to avoid distortion and to protect the elastomer, resulting in long-life and controlled actuation even under harsh conditions. One diaphragm and spring fully meet the valve's operating pressure range requirements. The diaphragm assembly can be easily removed from the valve body with no need for disassembling the valve from the line.

Bermad 400 Series

The Model IR-400 Basic Valve uses valve differential pressure to power the diaphragm assembly open or closed. The lower side of the diaphragm, which serves to cushion the closing of the valve, is exposed to downstream pressure through a dynamic peripheral passageway that its width responds to differential pressure and flow along the downstream side of the valve.

On-Off Modes

2-Way Modulating Modes

3-Way Control Modes

Technical Specifications

[1] Fastening Bolts

Only four bolts (up to 10"; DN250 valve) fasten valve cover the body, ensuring quick in-line inspection and service.

[2] Valve Cover

Locates, centralizes and fasten diaphragm and spring ensuring smooth and accurate performance. Simple construction enables quick in-line inspection and service.

[3] Auxiliary Closing Spring

One single spring fully meets valve requirements for operating pressure range, ensuring low opening pressure and secured closing.

[4] Diaphragm Assembly

One piece elastomeric assembly that includes a peripherally supported flexible diaphragm, vulcanized with a rugger radial seal disk.

  • No need for special types of diaphragms to meet different operating conditions.
  • Progressive dynamic guidance, resulting in exceptionally stable action and restrained closing.
  • Valve opens and closes drip tight even with very low pressure supply.
  • Perfectly balanced diaphragm with no distortion caused by uneven hydraulic forces on shut-off or during regulation.
  • Exceptionally stable and chatter-free action during shut-off and pressure regulation.
[5] Body Threads

No need for nuts, simplifying valve disassembling and assembling for maintenance.

[6] Wide Body Valve

Hydro-dynamically designed for efficient flow with minimal pressure loss and excellent resistance to cavitation.

[6.1] Diaphragm Supporting & Guiding

[6.2] Diaphragm Balancing Chamber

[6.3] Valve Seat

Full bore, valve port area clear of obstructions; no ribs or stem guides. Flow entrance is vertical to seal disk.

[6.4] End Connections

Conforms to pressure ratings and standards of ISO, ANSI, JIS, BS, and others.

Technical Specifications

Connections Standards

Flanged: ISO 7005-2

Threaded: Rp ISO 7/1

Grooved: ANSI C606

Operating Pressure Ranges:

IR-400: 0.5 - 16 bar

For lower pressure requirements, please contact us.


Water up to 60C

Standard Materials:

  • Castings & Forgings:
    - Castle Iron to EN 1561
    - Ductile Iron to EN 1563
    - Brass
    - Plastic: Polyamid 6+30% GF
  • Elastomers: NR to EN 681-1
  • Coatings: Elastostatic Powfer Coating Polyester

Construction Materials

Globe Pattern

Angle Pattern

Globe Pattern GR-400

PDF Datasheets

PDF - Download Icon
Engineering Data*

2D CAD Drawing

PDF - Download Icon
Engineering Data*
* Note: For some products Manual or Engineering Data are available only upon request.

Cannot download file or do you need more information? Please contact us below.

Thank you! Your submission has been received!
We will contact you as soon as possible.
Oops! Something went wrong while submitting the form.

For more information or different sizing please contact us.

Product code

Bermad Model 405 - General Information

Contact Us

Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.