Parker O-Ring Handbook.pdf

5.31.4 O-Ring Glands for Rotary Seals
Design Chart 5-4 provides the basis for calculating gland
dimensions. For standard O-ring sizes, these dimensions
have been calculated and are listed in Design Table 5-4. The
procedures for the use of Design Table 5-4 are outlined in
Design Guide 5-4 below.
Pressure
16 Max.
M
Locate Seal as Close as
Possible to Lubricating Fluid
1/2 E
B Dia. = O-ring I.D. + .002
D Dia.
(D Min. = B Max. + E Min.)
Parker O-Ring Handbook
After selecting gland dimensions, read horizontally to
determine proper O-ring size number. Specify compound.
Refer to the discussion on rotary seals earlier in this chapter
for the selection of the proper compound The effective part
number for an O-ring consists of both a size number and a
compound number.
Rotary O-Ring Seal Glands, 55.2 Bar (800 psi) Max.
See Rotary Seal discussion in Dynamic Seals section before using this chart.
A-1 Dia.
(A-1 Min. = B Max. + 2L Min.)
0° to 5° Typ.
Break Edges
(0° Preferred)
Approx. .005 Rad.
1/2 E
16
W
W
I.D.
32
R
32
G
32
Gland Detail
F L
Finishes are RMS values
W
Gland
Depth
F Groove
Depth (Ref.)
.003 Typ.
Section W-W
Note: Due to effect of centrifugal force, do not locate groove in shaft. Refer to Design Chart 5-4 (below) and Design
Table 5-4 for dimensions.
Rotary O-Ring Seal Glands, 55.2 Bar (800 psi) Max. (c)
(Below 200 FPM, Use Design Chart 5-2)
O-Ring
Size
Parker
No. 2-
004
through
045
102
through
163
201
through
258
W
Cross Section
Nominal Actual
1/16
3/32
1/8
0.070
±.003
0.103
±.003
0.139
±.004
Maximum
Speed
FPM (a)
200
to
1500
200
to
600
200
to
400
Squeeze
%
0-11
1-8 1/2
0-7
L
Gland
Depth
0.065
to
0.067
0.097
to
0.099
0.133
to
0.135
G
Groove
Width
0.075
to
0.079
0.108
to
0.112
0.144
to
0.148
E (c)
Diametral
Clearance
0.012
to
0.016
0.012
to
0.016
0.016
to
0.020
Eccentricity
Max (b)
.005
Typ.
W
M
Bearing
Length
Min. (c)
0.002 0.700
0.002 1.030
0.003 1.390
R
Groove
Radius
0.005
to
0.015
0.005
to
0.015
0.010
to
0.025
(a) Feet per minute = 0.26 X Shaft Diameter (inches) X rpm.
(b) Total indicator reading between groove OD, shaft, and adjacent bearing surface.
(c) If clearance (extrusion gap) must be reduced for higher pressures, bearing length M must be no less than the minimum fi gures given. Clearances given are
based on the use of 80 shore durometer minimum O-ring for 55.2 Bar (800 psi) max. See Figure 3-2 for recommended clearances when pressures exceed
55.2 Bar (800 psi).
Design Chart 5-4: Design Chart for Rotary O-Ring Seal Glands
Parker Hannifi n Corporation • O-Ring Division
2360 Palumbo Drive, Lexington, KY 40509
Phone: (859) 269-2351 Fax: (859) 335-5128
www.parkerorings.com
Dynamic O-Ring Sealing
5-39