Page 24 - GarlockFluidSealing2010

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Equipment Condition
No matter what type of equipment you are trying
to seal, the condition of the equipment is critical to the
success of the packing. Garlock recommends:
Valves
¦ Longitudinal scores on the valve stem are not to
exceed 1/32" depth and/or a depth-to-width ratio
greater than 1.00.
¦ Stem fnish no greater than 32 (micro inches) AARH.
¦ Stuffng box fnish is recommended to be 125
(micro inches) AARH.
¦ Valve stem warpage / runout must be checked and
found not to exceed:
Runout
Stem Diameter (TIR / ft)
Up to and including 1.500" (38.1 mm) ±0.010"
1.501" to 3.000" (38.1 mm to 76.2 mm) ±0.020"
3.001" (76.2 mm) and above ±0.040"
¦ The bottom of the gland follower should be fat. If
box bottom is beveled, Garlock recommends the
use of a system-compatible braided packing ring to
be installed before the bushing.
¦ Stuffng box should contain no burrs on the stem
and/or box bore walls.
Stuffng box dimensions
Recommended
Shaft Diameter Cross Section (CS)
Inches mm Inches mm
5/8" to 1-1/8" (15.8 to 28.6) 5/16" (7.9)
Over 1-1/8" to 1-7/8" (28.6 to 47.6) 3/8" (9.5)
Over 1-7/8" to 3" (47.6 to 76.2) 1/2" (12.7)
Over 3" to 4-3/4" (76.2 to 120.7) 5/8" (15.8)
Over 4-3/4" to 12" (120.7 to 304.8) 3/4" (19.0)
D = d + (2 x CS)
¦ Recommended box depth (L) = (5.5 to 7.5) x CS
¦ Recommended surface fnishes:
Stem / Sleeve: 16 to 32 (micro inches) AARH
Box Bore: 125 (micro inches) AARH
WARNING:
Properties/applications shown throughout this brochure are typical. Your specifc applica-
tion should not be undertaken without independent study and evaluation for suitability.
For specifc application recommendations consult Garlock. Failure to select the proper
sealing products could result in property damage and/or serious personal injury.
Performance data published in this brochure has been developed from feld testing,
customer feld reports and/or in-house testing.
While the utmost care has been used in compiling this brochure, we assume no respon-
sibility for errors. Specifcations subject to change without notice. This edition cancels
all previous issues. Subject to change without notice.
GARLOCK is a registered trademark for packings, seals, gaskets, and other products
of Garlock.
Pumps
¦ Runout: TIR (Total Indicator Runout) not to exceed
0.005".
¦ Longitudinal scores: none should be present on
pump shaft or sleeve.