MV208-20 Oil-Air Mixing Valve
The MV208-20 is an eight-outlet oil-air mixing valve from the SKF Vogel MV family, for use where a metered oil quantity is carried by compressed air to lubrication points. It is the NBR seal version of the MV208, and this page is an aftermarket cross-reference listing. Learn how central lubrication systems manage these valves at What is a central lubrication system.
What the Designation Decodes To
The MV oil-air mixing valve family runs from MV202 to MV208, and the final digit gives the outlet count: MV202 has 2 outlets and MV208 has 8 outlets. The suffix -20 indicates an NBR seal version, while a separate version marked -20-S8 uses FKM seals. Some older listings wrote “FPM” for the -20 version; FKM and FPM name the same rubber family, but the -20 base version is NBR, so treat FPM claims on old listings with caution.
Metering Nipples
The metering nipple markings and outputs are as follows:
- Marking 1 = 0.01 cm3 per stroke
- Marking 3 = 0.03 cm3 per stroke
- Marking 6 = 0.06 cm3 per stroke
- Marking 10 = 0.10 cm3 per stroke
- Marking 16 = 0.16 cm3 per stroke
The 0.01 cm3 nipple is not exchangeable; in other words, that nipple size is fixed on the valve when selected. The other four metering nipple sizes are exchangeable, so you can change outputs after installation.
Connections and Supply Requirements
The oil-air mixture outlets are M8x1, designed for 4 mm tube. The air connection is M10x1, designed for 6 mm tube. Minimum air supply pressure is 3 + 0.5 bar, meaning you need at least 3 bar plus an additional 0.5 bar. Minimum oil pressure is 17 bar, required when using the 0.01 cm3 metering nipple. Every outlet must be connected; the valve is not run with blanked outlets.
How an Oil-Air Mixing Valve Works
The valve mixes a metered quantity of oil into a compressed air stream, and the transport air carries the oil along the tube to friction points. The oil arrives as a fine coat on the surface, not a spray bath. For a related oil mist pump option, see oil mist pump.
Tubing and Ordering Practice
The M8x1 oil-air mixture outlets take 4 mm tube, and the M10x1 air connection takes 6 mm tube. Do not leave any outlet blanked; every outlet must be connected during operation. Full pressure ranges, temperature range, viscosity range, and air consumption must be confirmed from the current data sheet at quotation. For tube supply in coil form, see this helical coil nylon pipe. For ordering help, contact the quotation team.
Frequently Asked Questions
What exactly is an MV208-20 valve?
It is an eight-outlet oil-air mixing valve with NBR seals. The -20 suffix identifies the seal material version.
How many outlets does this valve have?
The MV208 provides 8 outlets in total. The final digit of the family name gives the outlet count.
Can I use FKM seals on the base -20 version?
No, the base -20 version uses NBR seals only. To get FKM seals, you need the separate -20-S8 version.
What does the old FPM marking mean?
FPM and FKM are two names for the same fluoro rubber family, not for NBR. Old listings that attach FPM to the -20 version mislabel the NBR base version.
Which metering nipple cannot be changed?
The 0.01 cm3 nipple is not exchangeable once the valve is built that way. The 0.03, 0.06, 0.10, and 0.16 cm3 nipples are exchangeable.
What tube sizes fit the connections?
The oil-air mixture outlets take 4 mm tube with M8x1 threads. The air connection takes 6 mm tube with M10x1 threads.
Can I blank off unused outlets?
No, every outlet must be connected, and the valve is not run with blanked outlets. Each outlet needs an active line.
What minimum pressures do I need?
Minimum air supply pressure is 3 + 0.5 bar, meaning 3 bar plus an additional 0.5 bar. Minimum oil pressure is 17 bar for the 0.01 cm3 nipple.
Are pressure ranges and temperature range fully listed here?
No, the retrieved catalog extract does not verify full pressure ranges or temperature range. You must confirm these from the current data sheet at quotation.
Who builds and supports this unit?
IsoHiTech Lubrication Systems, founded in 2023, engineering since 2006, builds and supports every unit. Email inquiry@isohitech.com for specifications and a quotation.
For ordering assistance, contact the quotation team. SKF, Lincoln, and Vogel are trademarks of their respective owners. This is an aftermarket valve, not manufactured, sponsored, or endorsed by SKF. MV208-20 and the MV series are SKF Vogel designations shown for cross-reference identification only.
