931 - Single lip NBR energised PTFE light to heavy duty rod wiper.

941 & 951 - Twinlip NBR energised PTFE light to heavy duty rod wiper.

Design
Claron Wiper Seals Style 941 and 951 are designed as low friction Double-acting seals to assist the sealing capability of single-acting Rod seal arrangements in arduous conditions. Double Acting Wiper Seals Style 941 and 951 should not be utilised in combination with double-acting Rod seals unless the housing design allows for pressure relief between the wiper and the seal.

Claron Wiper Seals Style 931 are designed as low friction Single-acting Rod wiper seals for use with other single or double-acting Rod seals in hydraulic and pneumatic cylinders. This style does not offer any assistance to the sealing capability of the Rod seal and therefore would not be recommended for use where Style 941 and 951 could be utilised. Housing sizes and tolerances for Style 931 are identical to Style 941. Style 951 utilises a seperate range of installation sizes.