BERMAD 450-60 User manual

MODEL 450-60
RESERVOIR VALVE (FLOAT VALVE)
INSTALLATIONOPERATIONMAINTENANCE
The information contained in this document is subject to change without notice.
BERMAD shall not be liable for any errors contained herein. All Rights Reserved. © opyright by BERMAD ontrol Valves. Page 1
DESCRIPTION
Model 450 -60 Reservoir Valve is an automatic control
valve designed to fill reservoir or tanks and to shut off
when the water reaches a pre-determined level.
The valve opening will modulate, adjusting the fill rate to
a discharge flow while maintaining a constant upper
level in the reservoir.
An upper control chamber, operating on a two way
control principle, has varying pressure produced by pilot
modulation and opens in conjunction with an upstream
restriction needle valve.
If the water rises to a pre-determined level, float action
will tend to close the pilot valve, and the main valve
modulates to close
INSTALLATION
1. Allow enough room around the valve assembly for making
adjustments and for future maintenance / disassembly work.
2. Thoroughly flush the pipeline to remove dirt, scale, and
debris. Failure to perform this operation may render the valve
inoperable.
3. It is recommended that an isolation valve be installed
upstream of the Bermad control valve to allow for future
maintenance operations.
4. Install the valve in the pipeline with the valve flow arrow on
the body casting in the proper direction. Use the lifting eye
provided on the main valve cover for raising and lowering the
valve. Install the valve horizontally with the cover up for best
performance.
5. After installation carefully inspect /correct any damaged
accessories, piping, tubing, or fittings.
6. Install the 2 way float pilot valve #22 inside the water tank
connecting it to the wall 30 cm. above the desire upper water
level.
7. Connect the horizontal port of the float to cock valve #2
on the valve, using 1/2” pipe.
ON LINE STATIC TEST PROCEDURES
OPEN VALVE: STATIC TEST
1. Close cock valve #1 and #2 to isolate the pilot control
system. This prevents dirt exposure in the control loop.
2. Remove plug from the cover of the valve.
Caution: This will allow the valve to fully open. Make sure
that this condition does not cause system damage!
3. Check for leaks at the flange connection fittings etc.
CLOSE VALVE: STATIC TEST
1. Open cock valve #1 and close cock valve #2.
2. Close the plug on the cover. Pressure will be built in the
main valve cover. Release tube connector slightly to release
air traps and then close it. The main valve should close.
3. Check the valve cover and diaphragm for leaks, tighten
bolts if necessary.
START-UP OPERATION
Note: Ensure upstream pressure exist.
1. Close cock valves 1 and 2 to isolate the control system.
This prevents dirt exposure in the control loop.
2. Remove the cover plug on the main valve cover, allowing
the valve to fully open.
3. Open isolation valves.
4. Replace the cover plug and close cock valve #2, the main
valve will close.
5. The needle valve #5 is factory set at one to one-and-a-half
turns. Turn the needle valve clockwise - to reduce the
closing rate speed of the main valve - or vice versa.
6. Check valve operation by slowly opening / closing cock
valve #2.
PARTS LIST
1, 2 Cock Valve.
4B Stagnation In Line Self Washing Filter.
5 Needle Valve.
22 2-Way Float Pilot Valve.

MODEL 450-60
RESERVOIR VALVE (FLOAT VALVE)
INSTALLATIONOPERATIONMAINTENANCE
The information contained in this document is subject to change without notice.
BERMAD shall not be liable for any errors contained herein. All Rights Reserved. © opyright by BERMAD ontrol Valves. Page 2
TROUBLESHOOTING
SYMPTOM CAUSE REMEDY
Valve fails
1. Insufficient inlet pressure. 1. Check/create inlet pressure.
to open.
2. Cock valve #2 closed. 2. Open cock valve #2.
3. Float valve trapped in upper
position.
3. Check float valve. (Flow should discharge when the valve is
open).
4. Needle valve #5 is open too much. 4. Close and readjust needle valve #5 on to one-and-a-half turns
on.
Valve fails
to close.
1. Needle valve #5 blocked or
closed.
1. Open and readjust needle valve #5 on to one-and-a-half turns
on.
2. Cock valve #1 closed. 2. Open cock valve #1.
3. Float pilot valve #22 trapped in
lower position.
3. Check if float valve #22 is operating in upper position.
Discharge flow should stop: if not, replace float valve.
4. Diaphragm in main valve leaking. 4. Test for leakage. Close cock valves #1, #2 and remove the
plug in the main valve cover. If a continuous flow exists, the
diaphragm is damaged or loose.
5. Debris trapped in main valve. 5. Remove and inspect diaphragm assembly. Check seat area.
Pub # : IOM450-60 1/08 By: YE 1/08 Rev: 01YE-1/08 File name: IOM450-60_01_08
PARTS LIST
1, 2 Cock Valve.
4B Stagnation In Line Self Washing Filter.
5 Needle Valve.
22 2-Way Float Pilot Valve.