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A shut-off valve is installed on the inlet pipeline of the methanol storage tank; can it also be installed on the pump’s inlet pipeline?

2020-01-03View Original

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A shut-off valve is installed on the inlet pipeline of the methanol storage tank. Can it be installed on the pump’s inlet pipeline as well? Since this is a renovation project, there was already a remote shut-off valve before the pump; generally, shut-off valves for the storage tank’s inlet pipeline are installed at the root of the pipeline. Is it feasible to install one before the pump?
Reply #22020-01-03
Install valves and shut down the pumps in the chain; otherwise, the pumps will overrotate and get damaged
Reply #32020-01-03
First, you need to understand what the purpose of this shut-off valve is. Such valves are generally used in fire scenarios to stop the flow of materials; when the valve is closed, it triggers an interlock that shuts down the pump. Additionally, these valves usually operate in an air-operated manner and are designed to close in case of an emergency, so they must be located at the base of the tank or tower
Reply #42020-01-03
Cut-off valves should be installed at the base of the storage tank, usually two. Methanol is a Class A fire hazard with high toxicity; to prevent accidents involving massive leakage of the substance from the tank, it is safest to install dual valves at the base of the tank.
Reply #52020-01-07
For safety reasons, emergency shut-off valves must be installed at both the inlet and outlet of the storage tank; these valves shut off immediately in case of a fire, preventing fire from entering the tank
Reply #62020-01-16
No, it must be installed at the base of the storage tank. This shut-off valve is intended for use in emergency situations; installing it in front of the pump only creates additional safety risks.

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