Available diaphragm materials for Verderair VA series pumps

PTFE/ APDM two pieces

Widest chemical resistant. Extreme corrosion resistance but limited abrasion resistance.

PTFE/ EPDM 1 piece (overmolded)

Widest chemical resistant. Extreme corrosion resistance. Very good abrasion resistance. No fixation plate at the liquid site necessary.

BUNA M

Good for water, petroleum based and hydrocarbon fluids. Not for use with strong solvents or chemicals

Geolast

Good abrasion resistance. Similar chemical compatibility as Buna N.

Hytrel

Often used as substitute for Buna N

Santoprene

Good abrasion and chemical resistance. Not for use with solvents or hydrocarbons. Often substitute for EPDM.

Fluorelastomers (Viton)

High level of corrosion resistance with acids. Good resistance for steam and unleaded fuels.

Polychloroprene (Neoprene) overmolded

Very soft rubber. Very good for abrasion. Limited resistant for corrosion. No fixation plate at the liquid site necessary.