Copyright Goodheart-Willcox Co., Inc.
Chapter 6 Cylinders 135
Note
If a spanner wrench is unavailable, and if a pipe wrench does not
fit on the gland, it is possible to fabricate a spanner wrench. A
spanner wrench can be made by welding properly spaced dowel
pins to a piece of steel.
Figure 6-15. Double-acting Teflon seal. A—The piston seals have been removed. The soft black rubber ring rides
underneath the rigid red Teflon ring, placing pressure against the Teflon ring. B—When the rings are installed, the
black rubber ring is covered by the red seal ring and is unseen.
Wear ring
Rubber
expander ring
Teflon
seal ring
Teflon seal
Figure 6-16. U-shaped and V-shaped piston lip seals use fluid pressure to force the lip against the cylinder’s barrel.
V-Shaped U-Shaped
B
A