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Swapping Valve Position on Alicat Instruments

Alicat standard pressure controllers and laminar DP mass flow controllers are equipped with a variety of valves to accommodate different process conditions and gas properties. The following tutorial shows how to change the valve position on Alicat laminar DP mass flow controllers and standard pressure controllers.

Please note:

How to swap the location of an Alicat small valve

This video shows how to change the valve position on any Alicat laminar DP mass flow controller or pressure controller utilizing a small valve. Valves can be switched from upstream to downstream, or vice versa. Please be extra careful with the display ribbon, as it is prone to rip if pulled on. Your Alicat warranty will not be voided if your warranty sticker is cut during valve swapping.

How to swap the location of a Rolamite valve

This video shows how to change the position of a large Rolamite valve on an Alicat mass flow controllers with a part number beginning with MCR or pressure controller with a part number beginning with PCR. You can either switch the valve from upstream to downstream, or vice versa.

The procedure takes about 10 minutes. While it is not highly technical, it is best performed by an experienced technician. Please be extra careful with the display ribbon, as it is prone to rip if pulled on.

How to swap the location of a PCR valve

This video shows how to change the position of a PCR valve on an Alicat laminar DP mass flow controller or pressure controller. You can either switch the valve from upstream to downstream, or vice versa.

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