Fomblin^® Family of PFPE High Vacuum Greases

Product data sheet for all products

Typical properties of Fomblin Greases
Grease Type	OT 20	UT 18	RT 15	YVAC 3	YRT 2	YNX	ZLHT	ZNF
Viscosity of base fluid at 20° C (ASTM D 335) (cSt)	35	500	1300	1500	1300	250	150	250
Thickener	PTFE	PTFE	PTFE	PTFE	PTFE	TALC	PTFE	PTFE
Penetration unworked after 60 strokes (ASTM D 217) mm/10	280 285	280 285	276 278	240 245	280 285	280 310	280 280	240 40
NLGI Class	2	2	2	3	2	/	2	3
Stability after 10000 strokes (ASTM D 217) (mm/10)	300	295	290	260	290	300	285	245
Anti rust properties EMCOR test	-	-	-	-	0/0
Apparent viscosity Poise at 20deg; C Shear rate 100 sec -1 Shear rate 300 sec -1	90 40	130 80	190 100	280 140	190 140	- -	150 60	240 100
Oil separation FTMS 791-321 Weight loss (%) at 66° C / 30 hrs at 149° C / 30 hrs at 204° C / 30 hrs	3 - -	- 6 -	- - 7.7	- - 8	- - 7.9	- 6.8 -	- - 6.6	- - 8
Evaporation (ASTM D 972) Weight loss (%) at 66° C/22h/120 I/h at 149° C/22h/120 I/h	0.2 -	- 0.4	- -	- -	- -	- 1.4	- -	- -
Evaporation (ASTM D 2595) Weight loss (%) at 204°C/22h/120 I/h	-	-	0.5	0.3	0.9	-	2.8	0.2
Range of Continuous Use Temperature (°C)	-70 120	-30 250	-20 250	-20 250	-20 250	-40 220	-80 200	-60 220

Shell four bal EP test-method IP 239: operating conditions: 1450 RPM 10 seconds duration

B.A.M. Oxygen Impact test at 60 degrees C.
Grease Type	OT 20	UT 18	RT 15	YVAC 3	YRT 2	YUH 2	YNX	ZLHT	ZNF
Limit pressure (bar)	100	100	130	80	240	150	100	110	100

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Fomblin® Family of PFPE High Vacuum Greases