Vacuum Greases and Diffusion Pump Oils

Apiezon Greases:

Apiezon Greases are unique products, designed for use in high vacuum work:

• Excellent lubricants.
• High purity, low vapor pressure - non-contamination in analysis.
• The working temperature range of each grease is dependent on the grade that is used.
• Easily applied, easily cleaned off.

Grease Physical Properties	L	M	N	H	T
Melting Point - ASTM.D 566, ºC	42-52	40-48	42-52	does not melt	112-137
Working temperature range, ºC	10-30	10-30	-269-30	-10-240	10-120
Vapor Pressure, Torr @20 ºC	7x10-11	7x10-9	6x10-10	1.7 x 10-9	4.6 x 10-9
Relative Density @20ºC	0.896	0.894	0.911	0.918	0.912
Radiation Resistance	Yes	Yes	Not Recom	. -	No
Outgassing Characteristics ASTMS .E 595-90 TML CVCM	<1% <0.1%	- -	<1% <0.1%	<1% <0.1%	- -
Lubricity 4 Ball Test ASTM .D 2763(IP 239), Kg	150	140	150	250	-
Viscosity of molten grease, cP @ 50 ºC @ 100 ºC	766 62.3	413 29.8	- -	- -	- -
Coefficient of expansion per ºC over 20ºC- 30ºC	0.00076	0.00075	0.00072		0.00073
Thermal conductivity, w/mºC	0.202	0.192	0.189	0.216	0.176
Latent heat of fusion, cal/g	15.1	18.7	15.0	-	-
Fusion Peak ºC	32	34	31	25	*
Volume resistivity, (cm)	1.2x1016	2.6x1016	2.0x1016	-	3.3 x 1012
Permittivity	2.3	2.1	2.3	-	2.3
Loss tangent	<0.0001	<0.0001	>0.0001	-	<0.0001
Surface breakdown at flash over, kV	24	28	27	-	24
Electric strength, V	730	850	820	-	730

*Too close to room temperature to measure

Apiezon Grease; Type L

Grease L is a petroleum hydrocarbon grease, containing no additives. Very low vapor pressure (@20°C of 8x10^-11 torr), high vacuum grade. Type L is widely used in the stationary phase of gas liquid chromatography, and may be used on all ground joints in a vacuum system (not for stopcocks). Its solubility is as follows: in Ethanol at 20°C-0.003%; 60°C-0.005%; 100°C-0.011%; 150°C-0.011%. Grease L softens and melts at about 47°C and it is not recommended for joints where temperatures exceed more than 30°C in use. Grease T is recommended for these higher temperatures.

60702

Apiezon Grease L

25g tube

87.00

Apiezon Grease; Type M

Similar to grease type L, but it contains more wax. Grease M has an estimated vapor pressure @ 20°C of 2x10^-9 torr, higher than Type L. Type M is recommended for applications where a grease of moderately low vapor pressure is required; such as for sealing ground joints on the backing side of oil diffusion pumps.

60700

Apiezon Grease M

25g tube

55.00

Apiezon Grease, Type N

Similar to Type L and Type M, but Type N grease has a special additive which gives it a tenacious, rubbery consistency and provides an extra cushioning effect which absorbs vibrations in equipment, making N grease invaluable in fragile glass to glass joints, like burette taps, which continually risk fracture. Grease N is widely recognized and recommended as the cryogenic vacuum grease of choice

60701

Apiezon Grease N

25g tube

132.00

Apiezon Grease, Type H

Type H grease is designed for high temperatures (-10 to +240°C) in a wide range of applications in both science and industry. With good "friction", grease H is ideal for use with laboratory glassware, but combined with properties of high thermal conductivity, it is the perfect choice for the electronics and space industries where heat sink media require adhesion.
Grease H is a filled hydrocarbon which exhibits excellent thermal conductivity, and strong absorption properties. The capability to absorb greasy or chemical impurities on metal and glass surfaces is a value "tool" required by electronic industries.

60703

Apiezon Grease H

25g tube

119.00

Apiezon Grease; Type T

Type T is designed for lubricating glass taps and for general purposes. Has a melting point of 125°C and has an estimated vapor pressure @ 20°C of 5x10^-9 torr. Although type T is useful at higher temperatures, it can also be used at ambient temperatures.
Temperature range: 0-120°C

60704

Apiezon Grease T

25g tube

116.00

Apiezon Grease, Type AP101

Type 101 is an excellent general purpose, hydrocarbon grease, which is intended for a variety of industrial and scientific applications.

• Anti-Seize Properties: The AP 101 contains PTFE which confers superior anti-seize properties providing long lasting lubrication and ensuring smooth operation of stop cocks and taps. The value of AP 101 anti-seize properties are not limited to laboratory or glassware use, but are equally effective when used on metal equipment which may be subject to seizure or corrosion.
• Non silicone Grease: Being hydrocarbon based AP 101 does not suffer from the problems of "creep" or "carry over" which is traditionally associated with silicone greases. It reduces sample contamination and the risk of interference in analytical techniques such as infra-red and mass spectrometry.
• Solvent resistant: Both PTFE and the lithium stearate gel base in AP 101 are insoluble in most solvents. They ensure that AP 101 shows resistance to water, alcohols, ketones and esters. In addition AP 101 resists attack from aqueous acid and alkali solutions, alcoholic alkali solutions and corrosive gases.
• Wide temperature range: It can be used over a very wide range of temperatures, possessing its optimum consistency over the -15 to +150ºC temperature range, but is usable down to -40ºC and, for limited periods, up to +180ºC.
• Under vacuum: AP 101 exhibits good vacuum properties, down to 10^-4 torr.
• Easily remove AP 101 by wiping it with a soft cloth. Any residues of grease can be washed away with an aqueous glassware detergent.

60706-01	Apiezon Grease AP 101	50 g	56.00
60706-40	Apiezon Grease AP 101	4 kg	2,457.00

Dow Corning® Vacuum Grease

A silicone lubricant for glass-to-glass joints and glass-to-rubber connections. Resistant to most chemicals and is inert and heat stable.

60705

Dow Corning Grease

150g tube

34.00

Invoil Oils (formerly known as Apiezon Oils)

Consists of esters or specially selected hydrocarbon fractions. They were developed for vapor-diffusion pump fluids:

• High purity, very low pressure, very stable.
• Pressures lower than 10^-7 torr obtainable
• No need for cold trap.
• Good pumping speed.
• No corrosive deposits or vapors.

Physical Properties of Apiezon Oils:

	Diffusion Pump Oils
	Type B	Type BW	Type C
Vapor Pressure,vtorr @20°C	10-6	10-6	10-7
Boiling Point,°C @ 1 torr	220	225	225
Flash Point (open cup)°F	470	480	510
Pour Point(ASTM) °F	15	10	5
Density, g/ml @ 20°C	0.872	0.882	0.875
@ 40°C	0.859	0.869	0.863
Viscosity, kinematic,cS @ 20°C	142	361	283
@ 50°C	49.3	98.1	90
@ 100°C	7.0	10.1	10.6
Coefficient of Expansion per °C over 20-30°C (ASTM)	0.00073	0.00070	0.00069
Thermal Conductivity Btu/in	0.91	0.89	0.96

Invoil Oil B

Good for small or large vapor diffusion pumps. Good pumping speed and high backing pressure. If a cold trap is used, oil B can obtain a higher vacuum than oil C does.

60720

Invoil Oil B

500ml

193.00

Invoil Oil BW

A water-white oil with a higher pumping speed than oil B, although all other characteristics are similiar to B. Because it has an extremely high purity it is suitable for use in the evacuation of mass spectrometers.

60722

Invoil Oil BW

500ml

247.00

Invoil Oil C

Obtains the highest vacuum pressure (10^-7 torr) of all of the oils without the need of a cold trap.

60724

Invoil Oil C

500ml

247.00

Santovac® 5

A Polymethyl Ether, designed for an ultra high vacuum range: 10^-10 torr.

Ultra low vapor pressure results in low ultimate pressures; there is no need for a cold trap and it is suitable for diffusion pumps. Santovac 5 may discolor with use but it will maintain its physical properties.

Typical physical properties of Santovac® 5:

Vapor Pressure @ 25°C	4 x 10-10 torr
Boiling Point @ 0.5 torr	275°C
Density @ 25°C	1.198
Viscosity: cS @ 27°C	1000
@ 38°C	363
@ 99°C	13.1
@ 149°C	4.5
@ 260°C	1.2
Flash Point, open cup	288°C
Pour point	5°C
Autogeneous Ignition Temp.	590°C
Refractive Index, nD25	1.6306

60730	Santovac 5	100ml	300.00
60732	Santovac 5	500ml	1000.00

For all other Oils and Greases

Please see Vacuum Pumps, Accessories, & Evaporation Supplies

Apertures and Aperture Cleaning