Flow reactor plug

A plug (10) for plugging a port in a flow reactor, the plug (10) comprising:

• a metal guide (12) having first and second ends (14,16) and a wall (18) surrounding a cylindrical interior volume (20), the interior volume (20) having an opening (22) at the first end (14) of the guide (12) and being closed at the second end (16) of the guide (12) by a screw (24) mated to a screw thread (26) on the interior (28) of the second end (16) of the guide (20), the screw (24) having a screw end face (30) opposite the opening (22) of the interior volume (20);
• and
• a plug body (40) having a first face (42) and an opposing second face (44) and a side surface (46) connecting the first face (42) and the second face (44), the plug body (40) positioned partially within the interior volume (20) of the guide (12) with the second face (44) of the plug body (40) and a first portion (48) of the side surface (46) of the plug body (40) positioned inside the interior volume (20) of the guide (12), and with the first face (42) of the plug body (40) and a second portion (50) of the side surface (46) of the plug body (40) protruding from the opening (22) of the interior volume (20) of the guide (12), the first face (42) comprising a recess (52) for receiving a gasket, the second face (44) facing the screw end face (30) for contact therewith, the plug body (40) comprising a first polymer having chemically resistant properties, said first face (42) of the plug body (40) being formed of said first polymer;
• wherein the plug body (40) further comprises a second polymer having thermally resistant properties, with at least the first portion (48) of the side surface (46) of the plug body (40) and the second face (44) of the plug body (40) being formed of said second polymer.