IR-457-66-U IOM
3Pages

Level and Flow Control Valve with Bi Level Vertical Float (Sizes 1.5''- 16"; DN40-400) Description: 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 that controls reservoir filling, opening at preset reservoir low level, and shutting at preset high level. During filling, it limits the flow to a maximum preset value. Ensure enough space around the valve assembly for future maintenance and adjustments. Prior to valve installation, flush the pipeline to insure flow of clean fluid through the valve. For future maintenance, install Isolation gate valves upstream and downstream from Bermad control valve. Install the valve in the pipeline with the valve flow direction arrow in the actual flow direction. Use the lifting ring provided on the main valve for installing the valve. For best performance, it is recommended to install the valve horizontally and upright. For different valve position-consult Bermad. It is highly recommended to install a strainer Bermad model 70F upstream from the pressure reducing valve, to prevent debris from damaging valve operation. After installation carefully inspect/correct any damaged accessories, piping, tubing, or fittings. Install the float pilot assembly either at an external balancing tank or at an internal stilling tank (refer to the enclosed "Float #66" catalog page). Pull three parallel ½” or ⅜" control tubes, from the valve to the float. Mark each of the tubes at both sides for identification. Determine the desired rod length according to level differential between the float assembly and reservoir lowest level. Assemble the extension rods to the upper rod and to one another. Apply glue (“Loctite 200" or equivalent) and screw tight. Be careful not to damage the rod. Install the upper & lower stoppers on the rod without the float ball. Use 3/16” Ellen-Key to lock the stoppers on the rod Screw the upper rod to its place at the bottom of the lever system & tighten the lock nut by ½” spanner. Balance the float assembly by moving the weight against the rod and stoppers (without the float ball). After reaching equilibrium, tighten the balancing-weight screw and its lock-nut by 7/16" spanner. Remove the lower stopper to enable threading-in the float ball. Reassemble the lower stopper & lock it in its place. Note: You may have to pull out the whole rod, in order to reach the lower stopper. If so, release the rod lock-nut, unscrew the installed rod (with its extensions & the stoppers) and pull it up from the stilling tank. After threadingin the float ball and locking the lower stopper back in its place, reassemble the installed rod. Connect the control tubes ends, using ⅜” copper or reinforced plastic tube, according to con

Commissioning & Calibration: 1. Confirm that cock's valves (1+2) are open. (Handle parallel to cock- valve body). 2. Confirm that the pressure supply is typical. 3. Adjust water levels by setting the stoppers: 3.1. Hold the lever system at its upper position & set the upper stopper to 100 mm below desired upper level (but not higher than 150 mm below over-flow level). 3.2. Hold the lever system at its lower position & set the lower-stopper to 100 mm above desired lower level. 4. Open upstream and downstream isolating valves. Allow the 453-66 to open (ensuring the lever system is at its...

BGRMAD IrrigationTrouble-Shooting: Symptoms Preventive Maintenance: 1. System operating conditions that effect on the valve should be checked periodically to determent the required preventative maintenance schedule. 2. Maintenance instructions: 2.1.1. Metric and imperial wrenches 2.1.3. Visual inspection to locate leaks and external damages 2.2. Functional inspection including: closing, opening and regulation. 2.3. Close upstream and downstream isolating valves (and external operating pressure when used) 2.4. Once the valve is fully isolated vent pressure by loosening a plug or a fitting....