Flow control arrangements with bypass switches, semiconductor processing systems, and related flow control methods

A flow control method, comprising:

• at a flow control arrangement including a housing seating an inlet conduit and an outlet conduit, an isolation valve arranged in the housing and connected to the inlet conduit, a flow switch with a shutoff trigger arranged in the housing and coupling the isolation valve to the outlet conduit, and a bypass switch having first and second positions coupled to the isolation valve,
• moving the bypass switch to the first position or the second position;
• operably coupling the flow switch to the isolation valve when the bypass switch is in the first position;
• operably decoupling the flow switch from the isolation valve when the bypass switch is in the second position;
• whereby the isolation valve is closed when flow rate of a fluid traversing the flow switch is greater than the shutoff trigger while the bypass switch is in the first position;
• and
• whereby the isolation valve remains open when flow rate of a fluid traversing the flow switch is less that the shutoff trigger while the bypass switch is in the second position.