Supor sy50hc 18q Is the rubber cap removed from the stop valve of the inner pot cover?

I can't.

Supor sy50hc 18q The rubber cap on the stop valve of the inner lid cannot be removed. This rubber cap is called a pot ring to keep the pressure in the pot. It needs to be replaced after a long time, and the dimensions must match. The size will be printed above the handle position, otherwise it will explode.

Supor is a leading brand of small kitchen appliances in China, a research and development manufacturer of cookware, and the first listed company in China cookware industry. Supor was founded in 1994 and its headquarters is in Hangzhou, China.