For example, diaphragms:

Rubber

Rubber diaphragms are molded from natural rubber, with artificial additives incorporated into the rubber to enhance the diaphragm's chemical resistance and flexural properties.

Neoprene... Used as an inexpensive general-purpose diaphragm for non-corrosive liquids.

Buna-N (Nitrile Rubber)... Inexpensive diaphragm for petroleum/oil-based liquids.

EPDM (Ethylene Propylene Diene Monomer)... Good flex life under extremely low-temperature conditions.

Viton (Fluorocarbon Rubber)... Good flex life under extremely high-temperature conditions, used for conveying aromatic or chlorinated hydrocarbons and acidic liquids.

PTFE F46 (Teflon)
Teflon is considered one of the most chemically stable synthetic materials. Yangtze River Pump Industry Co., Ltd. manufactures patented Teflon diaphragms with reinforcing ribs to control the diaphragm's flexural shape, thereby extending its service life. This innovation with Teflon diaphragms improves cost-effectiveness while significantly expanding the application range of diaphragm pumps. Teflon is not an elastic material and lacks elasticity, so a support diaphragm is used to provide support and extend its lifespan.