IR Engineering 400
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BERMAD Irrigation Basic Valve ??????? IR-400 Basic Valve The basic Model IR-400 diaphragm actuated hydraulically operated valve is at the leading edge of 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 globe design provides high flow capabilities with minimum head loss. The cover is removable via four (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. 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. The pressure in the control chamber varies, usually resulting from the combined action of a regulating pilot and a fixed orifice. This varying pressure modulates the valve to open or close.

400 Series On-Off Modes Closed Position Line pressure applied to the control chamber of the valve creates a hydraulic force that moves the valve to the closed position and provides drip tight sealing. Open Position Discharging the pressure from the control chamber to atmosphere or some other lower pressure zone, causes the line pressure acting on the plug to open the valve. Modulating Closed The restriction continuously allows line pressure into the control chamber. The pilot controls outflow from the control chamber. Throttling when it senses a pressure rise, it causes pressure to...

BERMAD IrrigationPrinciple of Operation3-Way Control Modes Fully Open Position When upstream pressure drops, the pilot blocks the pressure port and opens the drain port, venting the control chamber to the atmosphere. This fully opens the valve, minimizing head loss. Modulating Closed The pilot switches upon pressure rise, blocking the drain port and opening the pressure port. This pressurizes the control chamber, forcing the valve to modulate closed. Locked Position When sensed pressure is equal to setting, the pilot shaft moves and blocks both the drain port and the pressure port. This...

Product Parts Features 400 Series [1] Fastening Bolts Only four bolts (up to 10"; DN250 valve) fasten valve cover to body, ensuring quick in-line inspection and service. [2] Valve Cover Locates, centralizes and fastens 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...

Technical Data 400 Series Construction Materials [1] [2] [3] [5] Description (1) DN100 & 150 grooved valves are constructed of Ductile Iron (2) Vulcanized Radial Seal Disk Technical Specifications Available Patterns, Size & End Connections G = Globe, A = Angle Connections Standard: Standard Materials: ■ Castings & Forgings: □ Cast Iron to EN 1561 □ Ductile Iron to EN 1563 Flanged: ISO 7005-2 (PN10 & 16) Threaded: Rp ISO 7/1 (BSP.P) or NPT Grooved: ANSI C606 Operating Pressure Ranges: IR-400: 0.5-16 bar For lower pressure requirements, consult factory GR-400: 0.5-10 bar Temperature: Water...

BERMAD Irrigation Globe Pattern info@bermad.com • www.bermad.com The information herein is subject to change without notice. BERMAD shall not be held liable for any errors. All rights reserved. © Copyright by BERMAD.

BERMAD Irrigation 400 Series Flow Charts Globe Pattern 2-Way circuit "Added Head Loss" (for "V" below 2 m/s): 0.3 bar Angle Pattern 2-Way circuit "Added Head Loss" (for "V" below 2 m/s): 0.3 bar 2-Way circuit "Added Head Loss" (for "V" below 2 m/s): 0.3 bar info@bermad.com • www.bermad.com The information herein is subject to change without notice. BERMAD shall not be held liable for any errors. All rights reserved. © Copyright by BERMAD.

Flow Properties Globe Pattern Valve flow coefficient, Kv or Cv Where: Kv = Valve flow coefficient (flow in m3/h at 1bar Diff. Press.) Cv = Valve flow coefficient (flow in gpm at Diff. Press. 1psi) Q = Flow rate (m3/h ; gpm) P = Differential pressure (bar ; psi) Gf = Liquid specific gravity (Water = 1.0) Equivalent Pipe Length, Leq Leq = Lk-D Where: Leq= Equivalent nominal pipe length (m ; feet) Lk = Equivalent length coefficient for turbulent flow in clean commercial steel pipe (SCH 40) D = Nominal pipe diameter (m ; feet) Note: The Leq values given are for general consideration only. 2g...

Technical Data 400 Series US English Construction Materials Description (1) 4 & 6" grooved valves are constructed of Ductile Iron (2) Vulcanized Radial Seal Disk Technical Specifications Connections Standard: Flanged: ■ ANSI B16.42 (Cast Iron) ■ ANSI B16.42 (Ductile Iron) Threaded: NPT or Rp ISO 7/1 (BSP.P) Grooved: ANSI C606 Operating Pressure Ranges: IR-400: 7-232 psi For lower pressure requirements, consult factory GR-400: 7-150 psi Temperature: Water up to 140°F Standard Materials: ■ Castings & Forgings: □ Cast Iron to ASTM A-126 Class B □ Ductile Iron to ASTM A-536 □ Brass □ Plastic:...