Operation
Periodic checks of the gas pressure in the
bladder should be made as follows:
- Isolate surge
suppressor from system pressure.
- Drain liquid from surge suppressor to zero hydraulic pressure.
- Check and adjust precharge (see appropriate section).
- Bring back on line.
WARNING: NEVER ALLOW SYSTEM LIQUID UNDER
PRESSURE INTO SURGE SUPPRESSORS WITHOUT PRECHARGING. DAMAGE TO THE
BLADDER WILL OCCUR.
While the basic design of the surge suppressor has no moving parts
other than the bladder, periodic checks will prevent system damage
due to incorrect adjustment of the precharge.
Maintenance
2-1/2, 5 and 10 gallon surge
suppressors
Tools
As shown in the accompanying photo (Photo A), few tools are required
to maintain the surge suppressor. In addition to standard shop tools,
the special tools recommended are as follows: Valve Core Tool (p/n
309784) Bladder Pull Rod (p/n 600763) Charging and Gauging Assembly
(p/n 701011)
Removal from system
- Exhaust all hydraulic pressure from surge suppressor and connecting
piping by closing the isolation valve and opening the drain valve
or plug and relieving pressure.
- Remove the gas charging valve guard and cap (Photo B).
- Use a valve core tool to release gas pressure from the bladder.
- Unscrew flange nuts and remove bolts.
- Transfer surge suppressor to work area.
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Disassembly
- Securely clamp the surge suppressor (preferably in a chain
vise). Make sure the surge suppressor shell is suitably protected
by
metal strips or padding on the vise base (Photo C).
- Remove the gas valve core (Photo D).
- Unscrew flange from fluid end of shell by using a spanner wrench
or two bolts and a bar (Photo E). Remove “O” ring.
If the surge suppressor is equipped with a screen assembly, remove
it (Photo F).
- Use a suitable wrench to remove nut from the gas valve stem
(gas end), while holding valve stem from twisting with a second
wrench on the valve stem flats (Photo G).
- Remove nameplate.
- Insert hand into the shell (fluid end) opening. With a closed
fist, depress the bag and eliminate as much gas pressure as possible
(Photo H).
- Grasp the heel of the bladder and withdraw it from the shell
(Photo I).
Cleaning & Inspection
- After disassembly, clean all parts with an approved cleaning
solution (such as varsol).
- Blow all parts dry with air pressure and place them where they
will be free from foreign matter.
- Check all elastomer items for deterioration, abrasion marks,
cracks, holes, bubbles or any similar defects.
- Replace “O” ring and any other items deemed unsuitable
for further use.
- Bladder may be checked for leaks by inflating to normal size
(3 PSIG maximum) and covering with a soapy solution, checking
for air bubbles. After testing, deflate immediately. WARNING:
OVER INFLATING BLADDER OUTSIDE OF SHELL MAY RESULT IN FAILURE
OF BLADDER.
- For surge suppressors used in water systems,
check all metal parts including surface
of the shell for rust and/or loss of protective
coating. (Loss of protective coating
requires recoating by a licensed
Heresite coating company.)
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