Asbestos rubber plate wrapped with PTFE, strength the features of anticorrossion, a widely used kind of PTFE envelop gaskets.

Ⅰ,Features

PTFE sandwich spacer is made by asbestos rubber plate wraped with PTFE,which possesses such features as anti-corrossion,and not reaction with dense acid,alkaline,and other oxidant.

Ⅱ.Specifications

Nominal(Dg)	insaidedia(mm)	outsidedia(mm)	height(mm)		Nominal(Dg)	insaidedia(mm)	outsidedia(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	1-5		200	215	271	3-5
50	55	100	1-5		250	273	326	3-5
Welding structure is applied for F4 when diameter is larger than 250.

Ⅲ,Main properties

Properties	Unit	Result
working temperature	°C	-10~250°C
medium pressure	MPa	0-6.4
ratio of leakage(<70MPa)	cm3/sec	1?0-3

IV,Applications

Used as sealing materials for pipes,flanges,reaction vessels,valves,and other containers.