P 303 Slam Shut Off Valves

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  Slide 1  ZICOM  YOUR PARTNER IN PROGRESS ZICOM EQUIPMENT PTE. LTD.  ZICOM Onsite TrainingOn200 MMSCFD City Gate Station & 50 MMSCFD  Natural Gas HP district Regulation Station Plant Venue:SingaporeDate:4 th October, 2019 GAS TRANSMISSION COMPANY LIMITED  Slide 2  ZICOM  YOUR PARTNER IN PROGRESS ZICOM EQUIPMENT PTE. LTD.  ZICOM Basic Training on SLAM SHUT- OFF VALVES Conducted by:XXXXXXEngineer (XXX)ZICOM Equipment Pte. Ltd.  Slide 3  ZICOM  YOUR PARTNER IN PROGRESS  SLAM SHUT   -   OFF VALVE   Slide 4  ZICOM  YOUR PARTNER IN PROGRESS INTRODUCTION  Slam Shut-off valve is installed immediately after the filter & prior to the Regulator. It normally remains open, in case the outlet pressure of the regulator exceeds the permissible limit, the slam shut-off valve senses it through the impulse line & immediately shut off the flow to downstream.When the regulator is repaired, the slam shut-off valve is to be opened manually. Once the flow starts through the slam shut-off valve it will remain open till the outlet pressure of the regulator is within limits.Slam-shut valve is an automatic shut-off appliance suitable for installation as a safety device in regulating stations and on gas transfer and distribution lines. Slam Shut Valves are specifically designed to protect downstream equipment from either under or over  pressure conditions. For instance, a slam shut can be used to mechanically isolate a gas system should the  pressure exceed a given value (over pressure cut off or OPCO). A slam shut can also be used to mechanically shut off a gas system should the pressure fall below a given value which may happen if a gas line is severed (under pressure cut off or UPCO).


Sep 22, 2019
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