How to swap the location of any small valve

This video shows how to change the valve position on any Alicat mass flow controller or pressure controller utilizing a small valve 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.

Note: If you have a medium or large valve controller please contact Alicat for assistance. If you have a controller with a rolamite valve, skip ahead to the Rolamite valve swap video tutorial below.

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 controller (part numbers beginning with MCR) or pressure controller (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 mass flow controller or pressure controller. You can either switch the valve from upstream to downstream, or vice versa.