: JGW, JGR
AND
JGJ
S
ECTION
5 - M
AINTENANCE
PAGE 5 - 28
Type "BTR" Single Acting Seal Set
This set is made up of three rings. It seals in one direction only. The first ring (pressure side)
is radially cut with an installed total end gap of 0.078 to 0.109 inches (1.98 to 2.77 mm) for
Teflon material and 0.156 to 0.187 inches (3.96 to 4.75 mm) for bronze, Polyimide and
PEEK materials. The second ring is a tangentially step cut ring and is also made of Teflon.
The first two rings are doweled so the cuts are staggered from one ring to the other. The
third ring is called a back-up ring and is radially cut. The bore in this ring is larger than the
rod diameter. This allows the radial joints to be tight together forming a gas seal. No dowel is
necessary for this ring. See Figure 5-15:
F
IGURE
5-15: T
YPE
“BTR” S
INGLE
A
CTING
S
EAL
S
ET
Radial Cut
Alignment
Dowel
Radial Cut
Pressure Side Ring
Material: Teflon
Middle Ring
Material: Teflon
Back-Up Ring
Material: Cast Iron
Letters toward pressure/cylinder
B
T
R
BTR
Tangential
Step Cut
Summary of Contents for JGJ Series
Page 30: ...FOR MODELS JGW JGR AND JGJ SECTION 1 DESIGN SPECIFICATIONS DATA PAGE 1 24 1 01 NOTES ...
Page 34: ...FOR MODELS JGW JGR AND JGJ SECTION 2 INSTALLATION PAGE 2 4 1 01 NOTES ...
Page 44: ...FOR MODELS JGW JGR AND JGJ SECTION 3 START UP PAGE 3 10 1 01 NOTES ...
Page 114: ...FOR MODELS JGW JGR AND JGJ SECTION 5 MAINTENANCE PAGE 5 42 1 01 NOTES ...
Page 120: ...FOR MODELS JGW JGR AND JGJ SECTION 6 TECHNICAL ASSISTANCE PAGE 6 6 1 01 NOTES ...
Page 130: ...FOR MODELS JGW JGR AND JGJ SECTION 7 APPENDICES PAGE 7 10 1 01 NOTES ...
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