PTFE lined EPDM rubber expansion joint

PTFE lined EPDM rubber expansion joints have advantages of PTFE and Rubber,
PTFE can work in strong acid or strong alkali conditions,  and rubber (EPDM) has
very good flexible performance.
Flanges standard: AISI, DIN, JIS, BS etc, or customs design
Flanges material: Carbon steel, SS304, SS316, or other material.
Body:  EPDM, or Neoprene, Nature rubber, etc
Lining: PTFE (Teflon)
Size: DN50 (2") TO DN1000 (40")