Installation and maintenance guide:
NFPA recommend checking the system sea-sonally . The filter net is the main part that must be well maintained. It must be checked periodically and make sure to clear the deposits otherwise may affect the function of retard chamber.
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UL Retard Chamber
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Working Pressure
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12 kgf/cm2 (175 psi)
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Testing Pressure
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25 kgf/cm2 (350 psi)
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Delayed Time
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5～90 s
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