Kuhn Rikon recommends replacing lid gaskets annually.
Replacement Lid Gaskets for Kuhn Rikon Pressure Cookers
You can order gaskets by model number for current models. (For older models: The gasket sizes refer to the diameter across the inside edge of the gasket itself, not the diameter of the cooker. To convert from inches to centimeters, multiply inches x 2.54.)
Gaskets should be replaced periodically, as they will harden over time and stop working (which will cause seal loss, and your cooker won't work.) It's easiest to order a spare with your cooker, and it's also good to have a backup in case yours gets nicked or damaged by a stove burner, etc.
20 cm Gasket (Item #1657): Fits #3147, 3050 & 3914.
22 cm Gasket (Item #1501): Fits #3068, 3342, 3344, 3064, 3043, 3044, 3916 & 3918.
24 cm Gasket (Item #1502): Fits #3346, 3347, 30407 & 30408.
28 cm Gasket (Item #1503): Fits #3412, 3350 & 3266.
Flame Tamer/Energy Saver Disk
Our flame tamer will protect your smaller pressure cooker and your gasket on gas stoves. Especially recommended for the shallow Pressure Frypans, but equally effective for all other pressure cookers, stainless and copper cookware. The disk captures heat that would otherwise go up the sides of your pot, and directs it into the base of the pan, where it is quickly and efficiently absorbed. 11-inch diameter for added stability and energy efficiency for small pots. Coated for easy cleaning.
See dimensions of all Kuhn Rikon models here.
Flame Tamer 28cm (11") (Kuhn Rikon Item #2080)
Flame Tamer 24cm (9.5") (Kuhn Rikon Item #2081)