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		MICRO-PVD Fit Guide and Compatability notes

What Makes Our MICRO-PVD® Valves Better?

Valve surfaces are super finished to remove stress risers and create a high gloss surface finish. All surfaces RA 4 max micro inches.

No stem undercut for moly spray increases stem column strength.

MICRO-PVD® (physical vapor deposition) coating replaces moly sprayed stem coating.

High lubricity to prevent stem galling.

PVD coating protects all valve surfaces from oxidation and alpha case forming at temperatures up to 1650 F.

Catalog Information

COATING	COATING MATERIAL	MICRO HARDNESS(HV)	**COEFFICIENT OF FRICTION	MAX WORKING TEMP
MICRO-PVD® 1650	Multilayer design	3300	0.35	900C/1650F
MICRO-PVD® 2021	Multilayer design	3200	0.35	1100C/2012F

**Against steel(dry)

Fit Notes:
- MICRO-PVD® coatings are applied to all surfaces except valve face.
- MICRO-PVD® coatings may be custom applied to any specific area of valve as requested.
- MICRO-PVD® coating on valve seat will enhance valve seat wear substantially.
- MICRO-PVD® coating is not recommended with amco-bronze valve seats.
- MICRO-PVD® coating is recommended with iron, powder metal or nickel enhanced copper valve seats of higher Rockwell hardness.
- MICRO-PVD® cannot be applies to valves with existing moly sprayed coating.

*MICRO-PVD is a registered trademark of Stealth Engineering & Technologies (patent pending)
Fit Guide and Compatability notes, click to read