Blacoh SENTRY CIP Panduan Pemasangan & Pengoperasian - Halaman 7

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DO NOT USE PLASTIC MODELS AS SURGE SUPPRESSORS AT QUICK CLOSING VALVES.
METAL SURGE SUPPRESSORS FOR WATER HAMMER OR QUICK CLOSING VALVE APPLICATIONS.
CONSULT FACTORY FOR OPTIONS.
ATEX MODELS MUST BE GROUNDED (EARTHED) BEFORE OPERATION.
Turn pump off and remove all pressure from system prior to dampener installation.
Remove all pressure from dampener AND pumping system before disassembly, removal or maintenance.
Use compressed air or clean dry Nitrogen to charge dampener. DO NOT USE OXYGEN.
DO NOT exceed maximum allowable working pressure (MAWP) specified on dampener serial tag.
Always wear safety glasses and other appropriate safety equipment when installing, charging or
repairing dampener.
READ ALL SAFETY WARNINGS AND INSTALLATION & OPERATION INSTRUCTIONS IN THE
MANUAL BEFORE INSTALLATION.
I M P O R T A N T ! AFTER MAINTENANCE OR RE-ASSEMBLY OF METAL MODELS, USE NEW
FASTENERS AND TORQUE FASTENERS ACCORDING TO SPECIFICATION ON DAMPENER TAG.
Before performing a system pressure test, dampener must be charged with 80% of system test pressure to
avoid possible damage to bladder/bellows.
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The following pre-charge notes are for plastic dampener models with a maximum pressure rating
up to 150 psi (10.3 bar) and metal models with a maximum pressure rating up to 2000 psi (138 bar).
NOTE: Dampener can be pre-charged with compressed air up to a maximum pressure of 150 psi
(10.3 bar). If maximum pressure will exceed 150 psi (10.3 bar), dampener must be pre-charged with
Nitrogen only. DO NOT USE OXYGEN.
Pre-charge pressure should be checked at least monthly as gas molecules will diffuse through elastomeric
bladders, the speed of which depends on the elastomer material, temperature and pressure. Checks must occur
when no system pressure is present or inaccurate readings will be recorded. If temperature is above 72°F (22°C)
and/or pressure is over 300 psi (20.7 bar), checks should be performed more frequently. To prevent pre-charge
loss through the fill valve, always replace the fill valve cap after charging. A proper gas charge is the key to
dampener effectiveness and bladder/bellows life.
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Step 1 — Installation Position
Install the dampener in-line, as close to the pump discharge as possible to absorb the pulse at its source and
before any downstream equipment such as risers, valves, elbows, meters, or filters. Dampener installation should
be no more than ten pipe diameters from pump discharge. If using a flexible connector on the discharge side of
the pump between the pump and system piping, the dampener should be installed at the pump discharge manifold.
The flexible connector should be attached to the dampener's tee and system piping (see FIGURE 1). Since
pressure is equal in all directions, the dampener can be installed in a vertical, horizontal, or upside-down position.
A vertical installation is recommended for better drainage of the dampener. Limitations for horizontal and upside-
down mounting include high specific gravity, high viscosity, settling of solid material, or possible air entrapment,
which could result in shortened bladder/bellows life and/or reduced dampening performance.
Step 2 — Charging and Start-Up (see Pre-Charge Notes)
Chargeable models do not require an air line connection. Dampener can be pre-charged with compressed air up
to a maximum pressure of 150 psi (10.3 bar). If maximum pressure will exceed 150 psi (10.3 bar), dampener must
be pre-charged with Nitrogen only. Use a hand pump, Nitrogen tank or air compressor to charge dampener. DO
NOT USE OXYGEN. Charging hose kits are available from BLACOH.
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