Pioneer Weston Rotary Elastomer Seals - Metric

Part Number Format

Rotary Oil Seals Metric Pt No. Format

Standard Rotary Lip Seal Elastomeric Compound Reference

Polymer Type	Compound Reference	Colour	Hardness (IRHD)	Temperature Range	Select for..	Material Designator
Nitrile Rubber (NBR)	N-170-194	Black	70	-35 to +110^oC	General Purpose	BLANK
Fluorocarbon (FKM, A-Type)	V-75-27	Black	75	-20 to +200^oC	High temperature performance, high speed applications	F1
	V-85-195	Black	85			F2
	V-75-50	Brown	75			F3
Silicone (VMQ)	S-80-78	Red	80	-55 to +230^oC	High and very low temperature; high eccentricity	S1
Polyacrylate (ACM)	A-70-196	Black	70	-30 to +175^oC	High and low temperature capabilities; good compatibility with engine oils	A1
Hydrogenated Nitrile (HNBR)	H-80-40	Black	80	-40 to +180^oC	Abrasion resistance; high temperatures	H1

Other materials are available on request

Special Feature Designator

Feature	Function	Selection	Designator
Ribbed outer diameter	Helps to reduce press in force and improves static sealing on outer diameter. This function is primarily used for aftermarket requirements and is available only on seals with elastomeric outer diameters	-	50
Hydrodynamic aid	Helps as a pumping aid to improve functionality of the seal by transferring fluid away from the lip at high speeds to give a positive impact on the life of the seal	Clockwise Anti-clockwise Bi directional	C A B
Stainless steel spring	Rust and acid resistant spring	-	29
Sealant paint	Only available on metal cased seals, this sealant paint helps to seal against any housing imperfections	RED BLUE	2 3

If multiple special features are required, these should be expressed using multiple suffixes separated by a "/" sequenced as per the above table.

Example below:

A metric sized fluorocarbon R21 with a ribbed outer diameter and clockwise hydrodynamic aid, would be as follows: R20X30X7R21-F1/50/C