Description
Bermad IR-457-66-U Level and Flow Control Valve
The Bermad Model IR-457-66-U Level and Flow Control Valve with Bi-Level Vertical Float is a hydraulically operated, diaphragm actuated control valve.
The valve controls reservoir filling by opening at preset reservoir low level and shutting at preset high level. During filling, it limits the flow to a maximum preset value.
Operations
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- Full Range of Low Level Reservoirs
- Unavailable Power Supply Locations
- Limited Flow Capacity Systems
- Reservoirs Subject to High Inlet Pressure
- Pressure Braking Reservoirs in Gravity Fed Lines
- Systems Irrigated Directly from Fill-Up Line
Line Pressure Driven, Level & Flow Control
- Maintains pump and system designed flow
Bi-Level Hydraulic Vertical Float
- On/Off service
- Flexible level adjusting range
Hydraulic Flow Sensor (downstream installation)
- No moving parts nor electronic components
- Valve cavitation damage protection
Advanced Globe Hydro-Efficient Design
- Unobstructed flow path
- Single moving part
Fully Supported & Balanced Diaphragm
- Requires low opening and actuation pressure
- Excellent low flow regulation performance
- Progressively restrains valve closing
- Prevents diaphragm distortion
User Friendly Design
- Easy access to valve and float
- Simple in-line inspection and service
Pressure differential across the Orifice is in direct proportion to flow .The Pressure Reducing Pilot senses orifice upstream pressure and commands the Valve to throttle closed should this pressure rise above pilot setting.
Orifice downstream pressure is determined by Reservoir Level. Upon level rise beyond sliding range, the Float Pilot switches open directing line pressure to close the 2-Way Hydraulic Relay Valve, which causes the Valve to shut. Level drop causes the FP switch to close, opening the Valve.
As long as the Float is between stoppers and, the Valve remains in its last position. The downstream Cock Valve enables manual closing.
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