Heavy Duty Balanced Opposed Compressors - Ariel Corporation

Section 4 Part Replacement For Models: JGH:E:K:T
“BD” Double Acting Seal Set
This two-ring set consists of tangentially step cut rings doweled
to stagger the tangential cuts from one ring to the other.
Total end gap installed is 3/8 to 13/32 in. (9.5 to 10.3 mm) for
PEEK, Bronze, and Cast Iron, and 3/16 to 7/32 in. (4.8 to 5.6
mm) for Teflon. Maintain end gap by adjusting ring gap or
replacing the ring. This double acting set seals in either direction.
In cylinders operating near atmospheric pressure, it prevents
air from entering the cylinder. Install with the match mark
letters facing the pressure.
"WAT" Double Acting Seal Set
In this three-ring Teflon set, the first two rings (pressure
side) are radially cut; the third is tangentially step cut.
The last two rings are doweled to stagger the cuts from
one ring to the other. Total end gap installed is 3/16 to
7/32 in. (4.8 to 5.6 mm). Maintain end gap by adjusting
ring gap or replacing the ring. The first ring, along with
the center ring, forms a wedge that overcomes rod friction
and holds the ring set against both groove faces
during either direction of rod travel. Use this ring set primarily
for low pressure applications. WAT rings must be
centered when installed in the packing case.
“AL” Double Acting Seal Set
This five-ring Teflon set functions like a
double-ended “WAT” ring set. Total end
gap installed is 3/16 to 7/32 in. (4.8 to 5.6
mm). Maintain end gap by adjusting ring
gap or replacing the ring. It totally blocks
leakage in a groove supplied with lowpressure
fluid. AL rings must be centered
when installed in the packing case.
“BTU” Single Acting Seal Set
This three-ring set seals in one direction only.
The first ring (pressure side) is radially cut; the
second is tangentially step cut. These first two
rings are doweled to stagger the cuts from one
ring to the other. The third ring is called a back-up
ring. It is solid, with a bore larger than the rod
diameter, allowing radial joints to form a tight gas
seal. Total end gap installed is 3/8 to 13/32 in.
(9.5 to 10.3 mm) for PEEK, Bronze, and Cast
Iron, and 3/16 to 7/32 in. (4.8 to 5.6 mm) for Teflon.
Maintain end gap by adjusting ring gap or
replacing ring.
PAGE 4-20 3/11
M
D
V
U
U
V
V
Pressure
FIGURE 4-19 “BD” Double
Acting Seal Set
A
A
M
D D
FIGURE 4-20 “WAT” Double
Acting Seal Set
A
A
M
A
A A
A
A
U
Pressure
Pressure
FIGURE 4-21 “AL” Double Acting Seal Set
B
K
B B
FIGURE 4-22 “BTU” Single Acting Seal Set
K
K
Pressure