1、Feature：PTFE interlayer spacer is made of PTFE asbestos rubber plate which has anti-corrosion performance, and it can not react with concentrated acid、alkali and strong oxidant even under high temperature.

2、Usage：It is applied as sealed equipment for pipe、flange、reaction vessel、valve and container.

3、Specification：

nominal (Dg)	inside diameter (mm)	outside diameter (mm)	Height (mm)		nominal (Dg)	inside diameter (mm)	outside diameter (mm)	Height (mm)
10	15	40	1-3		65/70	76	120	1-5
15	18	45	1-3		80	89	138	1-5
20	25	58	1-3		100	108	158	3-5
25	32	68	1-3		125	133	188	3-5
32	38	78	1-3		150	162	218	3-5
40	45	85	1-3		200	215	271	3-5
50	55	100	1-3		250	273	326	3-5
when diameter is over 250, its F4 film is weld type structure.