Heavy Duty Balanced Opposed Compressors - Ariel Corporation

For Models: JGH:E:K:T Section 4 Part Replacement
Types of Piston Rod Packing Rings
“P” Pressure Breaker
This single ring is cut radially into three equal segments. It breaks
down or slows gas flow without sealing it completely. Total end gap
installed is 0.040 to 0.046" (1.0 to 1.2 mm) for PEEK, 0.020 to 0.026"
(0.5 to 0.7 mm) for Bronze and Cast Iron. Maintain end gap by adjusting
ring gap or replacing ring.
“UP” Pressure Breaker
This single solid ring breaks down or slows gas flow without sealing it
completely.
“P1U” Pressure Breaker
This two-ring set allows controlled leakage in one direction
only and installs in the first or second packing cup
(closest to the piston). The first ring (pressure side) is
one-piece with a single radial cut; the second ring is
solid and has a bore larger than the rod diameter. Total
end gap installed is 0.040 to 0.046 in. (1.0 to 1.2 mm)
for PEEK, and 0.020 to 0.026 in. (0.5 to .07 mm) for
Bronze, and Cast Iron. Maintain end gap by adjusting
ring gap or replacing the ring.
“BTR” Single Acting Seal Set
This three-ring set seals in one direction only. The first
ring (pressure side) is radially cut. The second ring is
tangentially step cut and made of the same material
as the first ring. These two rings are doweled to stagger
the 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. The third ring is called a back-up
ring. It is radially cut and has a bore larger than the
rod diameter. This allows the radial joints to form a
tight gas seal. This ring needs no dowel.
FIGURE 4-15 “P”
Pressure Breaker
Pressure
FIGURE 4-16 “UP”
Pressure Breaker
Pressure
FIGURE 4-17 “P1U” Pressure Breaker
D D
3/11 PAGE 4-19
A
D
M
A
FIGURE 4-18 “BTR” Single
Acting Seal Set
M
A
Pressure
M