PRESSURE SEALS, Inc.

81 Commerce Way, South Windsor, CT 06074

______________________________________________________________

DESIGN ENGINEERS’ O-RING SIZE GUIDE

INTRODUCTION:

Substantially all O-ring manufacturers present their catalog data in the

rotation of “groupings” or “families” of cross-sectional thickness first, then
followed by dimensions of inside diameter. All sizes with 1/16” nominal wall
are listed first, followed by rings with 3/32” wall, then 1/8” wall, etc. This is
the same mode of presentation found in the ARP 568 Uniform-Numbering
System, published as the Aeronautical Recommended Practice Report of the
Society of Automotive Engineers. The same practice of detailing sizes by
cross-sectional “families” is found in government specifications AN 6227, AN
6230, MS 9021, MS 15993, MS 28775, MS 29513, etc.

HEADACHE FOR DESIGN ENGINEERS:

A frequent result of this established mode of O-ring size presentation is the

laborious task of “plowing through” several sections of specification data. In
actuality, the design engineers usually are involved first with the outside or
inside diameter in a sealing application before they want to make a
determination as to what wall thickness or cross-sectional diameter of rubber
seal they wish to consider in their design.

RESCUE OPERATIONS:

Many O-ring applications, of course, involve metal parts turned out on lathes
and screw machines. Inevitably, some large production runs are found
beyond tolerance. The established O-ring size will not perform its sealing
function. Many dollars worth of expensive metal and material go down the
drain. However, the resourceful design engineer can rescue the situation
oftentimes by the use of a special size O-ring.

CIRCLE SIZE ROTATION:

We acknowledge gratefully the advice given to us by many design engineers

that circle diameters are much more significant to them as their first level of
consideration. In this GUIDE we have listed all Pressure Seals’ O-rings, for
which high production tooling is available, in progressive order by outside
diameter first, followed next by inside diameter, and then by wall thickness
or cross-section. The first three columns are in the regular English inch
system to the nearest thousandth of an inch. In the same order, the data is
repeated in the metric system. The final right-hand column gives the catalog
number for ordering purposes, and the catalog page on which tolerances are
Phone: (877)-PSI-SEAL Toll Free, In CT: (860) 282-9100, Fax: (860) 282-9001
 PRESSURE SEALS, Inc. 81 Commerce Way, South Windsor, CT 06074
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specified and on which, in most instances, you may find a full-size drawing to
assist you in your consideration of the O-ring.

DESIGN DIMENSIONS FOR O-RING INSTALLATION

O-rings are normally used as seals in several ways, and dimensions of the
groove or gland will also vary with the cross section of the ring, the type of
operation, and the amount of pressure used in the system. These dimensions
will also be different if the O-ring is sealing a liquid which has a low volume
swell on the ring (0-15% Design Chart 1&3) or if it is sealing a liquid which
has a high volume swell on the ring (15-25% Design Chart 2&4). It has not
been practical to attempt to seal liquids which will swell the O-ring more than
25%, in most cases, since the rings will lose most of their desirable physical
properties with such a high swell.

STATIC SEALS (Design Charts 1,2,3&4)

In a static seal, where the O-ring does not move and is used simply for
containing pressure or maintaining a vacuum, the ring may be compressed
AXIALLY or parallel to a line drawn through the center or axis of the ring. In
this case, you will use the dimensions under AXIAL opposite the cross section
of the ring you desire.

Although the depth and width of the groove will remain the same for all Axial
static seals, the I.D. and O.D. of the groove will vary depending on whether
you are sealing against internal pressure or external pressure (a vacuum in the
vessel being sealed.).

In the case of internal pressure, the O.D. of the groove should be the same as
the O.D. of the ring, plus the normal tolerance for that size ring.

In the case of external pressure (i.e., a vacuum in the vessel being sealed),
the I.D. of the groove should be the same as the I.D. of the ring being used,
plus the normal tolerance range for that size ring.

A static seal ring may also be compressed RADIALLY; that is, being
compressed between the internal diameter (I.D.) and overall diameter (O.D.).
In this case, you will use the dimensions under RADIAL opposite the
appropriate cross section column for the ring you wish to use.

Phone: (877)-PSI-SEAL Toll Free, In CT: (860) 282-9100, Fax: (860) 282-9001
 PRESSURE SEALS, Inc. 81 Commerce Way, South Windsor, CT 06074
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DYNAMIC SEALS (Design Charts 1,2,3,4&5)

Dynamic or moving seals basically fall into two classes; reciprocating (as in the
case of the piston and a cylinder), or rotating (as in the case of a shaft rotating
in a housing). Reciprocating design data will be found in Charts 1,2,3&4.
Rotating design data will be found in Chart 5.

Reciprocating seals may be designed so as to permit or prevent rolling of the

ring within the groove. When the ring is allowed to roll within the groove, the
breakaway force necessary to move the piston is usually lower; but some
sacrifice must be made in the pressure limitations of the seal and also in the
life of the seal. This is caused by the constant flex of the O-ring with each
stroke of the piston.

DIAMETRAL CLEARANCE (Design Chart 6)

Under the dynamic section you will also find a section on diametral
clearance. This calls out the maximum clearance between a piston and
cylinder for pressure to 1500 psi, using a 70 durometer compound (low swell
fluid) or a 60 durometer compound (in a high swell fluid). If higher pressures
are required, a different durometer O-ring may be used, as shown in Design
Chart 6; or Teflon back-up rings, as shown in Design Chart 7. Design Chart 6
gives an elaboration of the diametric clearance for various durometers and
various pressures. Adherence to there clearances will largely prevent extrusion
of the O-ring between the piston and cylinder or shaft and groove, up to 5,000
psi using 90 durometer compound.

ROTATING SEALS (Design Chart 5)

Rotating seals should be limited to shafts having the following maximum

rotational speed:

Shaft Diameter .125 - .280 – 350 ft./min

Shaft Diameter .281 - .625 – 400 ft./min
Shaft diameter .626 - .687 – 450 ft./min
Shaft Diameter .688 – 1.250 – 600 ft./min

In rotating shaft seals, a higher durometer (80-90) compound is usually used.

Preferably, it should have excellent abrasion resistance and quite often is
internally lubricated with graphite or molybdenum disulfide to give maximum
protection if run dry.

Phone: (877)-PSI-SEAL Toll Free, In CT: (860) 282-9100, Fax: (860) 282-9001
 PRESSURE SEALS, Inc. 81 Commerce Way, South Windsor, CT 06074
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To find the groove dimensions on a rotating seal, use Design Chart 5. Find the
shaft size in the second column. The groove root diameter and width will be
found under their respective columns. The Pressure Seals O-ring size will be
found in the first column next to the shaft diameter.

BACK-UP RINGS (Design Chart 7)

When you have a tendency for O-rings to extrude between the sealing areas
under pressure, there are three choices available to minimize this:

1. A harder O-ring material may be used.

2. Clearances may be reduced to a minimum.
3. Back-up rings may be used.

Design Chart 7 shows the groove width necessary to accommodate the

thickness of the back-up rings. Teflon back-up rings are usually furnished in
single or dual turn rings. Single turn rings conform to MS 28774 and match the
standard P.A.I. O-ring sire. Dual turn rings conform to MS 28782 and match
the dash numbers of an AN 6227 series of O-rings. MS 28783 back-up rings
match the dash numbers an AN 6230 O-rings.

Good practice is to use a back-up ring on either side of the O-ring, even
though the pressure on the ring may be from one side only. The only time you
will design for a back-up ring on one side is when there is not enough space
for two rings. This is not recommended, however, unless absolutely necessary.

STATIC SEAL: EXAMPLE RADIAL SEAL

It is desired to seal a pressure vessel filled with air at 200 psi. The I.D. of the
vessel at the sealing lip is 3.000” and the thickness of the cover at the groove
point is .250”.

Phone: (877)-PSI-SEAL Toll Free, In CT: (860) 282-9100, Fax: (860) 282-9001
 PRESSURE SEALS, Inc. 81 Commerce Way, South Windsor, CT 06074
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First: Pick a ring series that has a cross section which can be cut into the cover
without weakening the cover at this point. (100 series)

Second: Find an O-ring in this series which has an O.D. closest to 3.000” (1-
149-O.D. 3.006).

Third: Check the swell characteristics of air, with possible oil traces in it. (Low
swell – 0-15%)

Fourth: In the normal swell Design Chart 1, find the cross section column for
the 100 series rings (.103.003).

Fifth: In this column, opposite the RADIAL section, find the groove depth
(.083-.003) and the groove width (.125.005).

STATIC SEAL – EXAMPLE: AXIAL SEAL

It is desired to seal a pressure vessel filled with hydraulic oil at 1200 psi. The
I.D. of the vessel is 4 inches, and the flange is 1 inch wider and 3/8” thick (see
drawing).

First: Find the O-ring sizes that will fit within the sealing area. (I-244, I-156)

Second: Pick the series O-ring desired, based on the thickness of the flange
available to cut the groove depth desired. (I-244)

Third: Check the swell characteristics of the fluid on the rubber to determine
whether the normal or high swell chart will be used for dimensions of the O-
ring groove. (In this case 0-15% or normal swell Chart I)

Phone: (877)-PSI-SEAL Toll Free, In CT: (860) 282-9100, Fax: (860) 282-9001
 PRESSURE SEALS, Inc. 81 Commerce Way, South Windsor, CT 06074
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Fourth: Since this is an internal pressure application, the O.D. of the groove
should be the O.D. of the ring (4.512) plus the tolerance (.015) or 4.527
inches.

Fifth: Since this is an axial squeeze, look in the AXIAL section, Design Chart 1,
under the cross section of the ring (.139). The groove depth will be .110”-
.008” and the width will be .185.005.

DYNAMIC SEAL: RECIPROCATING, Low Pressure

A piston moves back and forth in a 1.000” cylinder to pump acetone at a

pressure of 200 psi, maximum. An O-ring seal is required for this piston.

First: Find ring sizes whose O.D. is close to 1.000” (I-117, I-210)

Second: Check the swell characteristics of the liquid being pumped. (Acetone
swells most rubbers but does not attack EPDM rubber, so an EPDM ring could
be used with normal swell – table I)

Third: Opposite the dynamic section under the cross section of the 100 series
(.103.003), find the depth of the groove (.090-.003) and the width of the
groove (.120.005). If it were desired that the ring roll in the groove, the
width would be .145.005.

DYNAMIC SEAL: RECIPROCATING, High Pressure

A piston seal is desired for a high pressure piston at 3,000 psi using hydraulic
oil. Piston diameter is .875”.

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 PRESSURE SEALS, Inc. 81 Commerce Way, South Windsor, CT 06074
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minute. The shaft diameter is 1.000 inches. The material being mixed is a
blend of oil and detergents.

First: In Design Chart 5, find in the second column the shaft size (1 inch)

Second: Under the groove root diameter, find the root diameter (1.265).

Third: Under the groove width column, find the groove width (.157).

Fourth: Under the radial clearance column, find the clearance of the shaft in
the housing (.0015-.002).

Fifth: Under the bearing I.D. tolerance, find the clearance of the shaft in the
bearing (-.0000+.0012).

Sixth: On the extreme left column, find the P.A.I. O-ring size (I-215).

DESIGN CHART #1 INDUSTRIAL O-RINGS – NORMAL SWELL (0-15%)

O-RING .040 .050 .060 .070 .070 .103 .139 .210 .275
CROSS SECTION .003 .003 .003  .003  .003 .003 .004 .005 .006
PSI 1-001
SIZE NUMBER 902-1/2 1-002 1-003 1-004 1-005 1-108 1-202 1-312 1-404
RANGE 1-055 1-178 1-284 1-395 1-476
O-RING ID 1/32 3/64 1/16 5/64 3/32 1/4 1/4 5/8 1-7/8
SIZE RANGE 1/16 6-1/2 9-3/4 18 26 27
AXIAL
SQUEEZE (min.) .010 .012 .014 .016 .017 .020 .025 .030 .039
GLAND .027 .035 .043 .051 .050 .080 .110 .175 .230
DEPTH (max.) -.002 -.002 -.002 - .004 - .004 -.006 -.008 -.010 -.010
GROOVE .063 .073 .084 .095 .095 .145 .185 .285 .375
WIDTH (min.) .002 .003 .003 .003 .003 .005 .005 .005 .005
(Wall to Wall)
RADIAL
SQUEEZE (min.) .007 .010 .012 .014 .015 .017 .020 .025 .035
GLAND .030 .037 .045 - .053 .052 .083 - .115 - .180 - .234 -
DEPTH (max.) -.001 -.001 .001 -.001 -.002 .003 .004 .005 .006
GROOVE .056 .064 .075 .090 .090 .125 .170 .240 .315
WIDTH (min.) .002 .003 .003 .003 .003 .005 .005 .005 .005
(Wall to Wall)
DYNAMIC
SQUEEZE (min.) .005 .006 .008 .009 .010 .010 .012 .017 .029
GLAND .032 .041 .049 .058 .057 .090 .123 .188 .240
DEPTH (max.) -.001 -.001 -.001 -.001 -.002 -.003 -.004 -.005 -.006

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GROOVE WIDTH
With Roll .063 .073 .084 .095 .095 .145 .185 .285 .375

No Roll .056 .064 .075 .090 .090 .120 .160 .235 .310
(Tolerance for .003 .003 .003 .003 .003 .005 .005 .005 .005
both)
DIAMETRAL
CLEARANCE (max.)*

500 psi .005 .006 .007 .008 .008 .010 .012 .014 .016
1500 psi .0025 .003 .0035 .004 .004 .005 .006 .007 .008
R RADIUS (max.) .005 .008 .012 .015 .015 .020 .030 .050 .060
ECCENTRICITY(max.) .001 .001 .001 .001 .002 .002 .003 .004 .005

* These maximum diametrical clearances based on 70 Durometer

compound. If harder compound is used, see Chart 6 for proper
maximum clearance.

DESIGN CHART #2 INDUSTRIAL O-RINGS -HIGH SWELL (15-25%)

O-RING .040 .050 .060 .070 .103 .139 .210 .275

CROSS SECTION .003 .003 .003  .003 .003 .004 .005 .006
PSI 1-001
SIZE NUMBER RANGE 902- 1-002 1-003 1-004 1-108 1-202 1-312 1-404
1/2 1-055 1-178 1-284 1-395 1-476
O-RING ID 1/32 3/64 1/16 5/64 1/4 1/4 5/8 1-7/8
SIZE RANGE 1/16 6-1/2 9-3/4 18 26 27
AXIAL
SQUEEZE (min.) .012 .015 .017 .020 .024 .030 .043 .056
GLAND .025 .032 .040 .047 .076 .105 .162 .213
DEPTH (max.) -.002 -.002 -.002 - .004 -.006 -.008 -.010 -.010
GROOVE
WIDTH (min.) .065 .076 .088 .108 .162 .215 .317 .418
(Wall to Wall)
RADIAL
SQUEEZE (min.) .010 .012 .014 .016 .020 .025 .030 .040
GLAND .027 .035 .043 .051 .080 .110 .175 .229
DEPTH (max.) -.001 -.001 -.001 -.002 -.003 -.004 -.005 -.006
GROOVE
WIDTH (min.) .065 .076 .088 .108 .162 .215 .317 .418
(Wall to Wall)
DYNAMIC
SQUEEZE (min.) .008 .010 .012 .014 .017 .020 .025 .035
GLAND .029 .037 .045 .053 .083 .115 .180 .234
DEPTH (max.) -.001 -.001 -.001 -.002 -.002 -.003 -.003 -.004
GROOVE
WIDTH (min.) .065 .076 .088 .103 .154 .204 .305 .405

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(Wall to Wall)

DIAMETRAL
CLEARANCE (max.)*

250 psi .004 .005 .006 .007 .009 .011 .012 .014
1000 psi .002 .0025 .003 .004 .005 .006 .007 .008
RADIUS (max.) .005 .008 .012 .015 .020 .030 .050 .060
ECCENTRICITY(max.) .001 .001 .001 .002 .003 .004 .005 .006

*These maximum diametral clearances based on 60 Durometer

compound. If harder compound is used, see Chart 6 for proper
maximum clearance.

DESIGN CHART #3 900 SERIES O-RINGS – NORMAL SWELL (0-15%)

O-RING .056 .064 .072 .078 .082 .087 .097 .116 .118
CROSS SECTION .003 .003 .003  .003  .003 .003 .004 .005 .006
PSI 1-902 1-904 1-909 1-911 1-920
SIZE NUMBER 1-901 1-903 1-905 1-906 1-907 1-908 1-910 1-916 1-932
RANGE
O-RING ID .185 .239 .351 .468 .530 .644 .706 .863 1.475
SIZE RANGE .301 .415 .755 1.171 2.337
AXIAL
SQUEEZE (min.) .010 .012 .014 .016 .017 .020 .025 .030 .039
GLAND .040 .046 .051 .058 .065 .072 .080 .090 .090
DEPTH (max.) -.002 -.002 -.002 - .004 - .005 -.005 -.006 -.006 -.006
GROOVE .079 .088 .095 .107 .120 .130 .145 .158 .158
WIDTH (min.) .002 .003 .003 .003 .003 .004 .005 .005 .005
(Wall to Wall)
RADIAL
SQUEEZE (min.) .011 .013 .014 .014 .015 .016 .017 .018 .018
GLAND .042 .047 .053 .063 .070 .078 .083 .094 .094
DEPTH (max.) -.001 -.001 -.001 -.001 -.001 -.002 -.003 -.003 -.003
GROOVE .070 .052 .090 .098 .107 .183 .125 .140 .142
WIDTH (min.) .003 .003 .003 .003 .004 .004 .005 .005 .005
(Wall to Wall)
DYNAMIC
SQUEEZE (min.) .007 .008 .009 .009 .009 .010 .010 .011 .011
GLAND .046 .052 .058 .065 .068 .072 .084 .101 .103
DEPTH (max.) -.001 -.001 -.001 -.001 -.001 -.002 -.003 -.003 -.006
GROOVE WIDTH
With Roll .079 .088 .095 .105 .111 .117 .145 .158 .160

No Roll .068 .078 .090 .098 .139 .109 .120 .145 .146
(Tolerance for .003 .003 .003 .003 .004 .004 .005 .005 .005
both)

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 PRESSURE SEALS, Inc. 81 Commerce Way, South Windsor, CT 06074
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DIAMETRAL
CLEARANCE (max.)*

500 psi .006 .007 .008 .008 .009 .009 .010 .011 .011
1500 psi .003 .004 .004 .004 .004 .004 .005 .005 .006
R RADIUS (max.) .008 .013 .015 .015 .015 .018 .020 .022 .022
ECCENTRICITY(max.) .001 .001 .001 .001 .001 .001 .002 .002 .002

* These maximum diametrical clearances based on 70 Durometer

compound. If harder compound is used, see Chart 6 for relative
maximum clearance.

DESIGN CHART #4 900 SERIES O-RINGS – HIGH SWELL (15-25%)

O-RING .056 .064 .072 .078 .082 .087 .097 .116 .118
CROSS SECTION .003 .003 .003  .003  .003 .003 .003 .004 .010
PSI
SIZE NUMBER 1-901 1-902 1-904 1-906 1-907 1-908 1-909 1-911 1-920
RANGE 1-903 1-905 1-910 1-916 1-932
O-RING ID .185 .239 .351 .468 .530 .644 .706 .862 1.475
SIZE RANGE .301 .415 .755 1.171 2.337
AXIAL
SQUEEZE (min.) .016 .018 .020 .021 .021 .022 .023 .025 .027
GLAND .039 .042 .048 .053 .056 .061 .072 .088 .090
DEPTH (max.) -.002 -.002 -.002 - .002 - .002 -.002 -.003 -.003 -.003
GROOVE
WIDTH (min.) .084 .092 .110 .121 .129 .138 .157 .186 .188
(Wall to Wall)
RADIAL
SQUEEZE (min.) .014 .015 .017 .018 .018 .018 .019 .021 .022
GLAND .040 .046 .052 .056 .059 .062 .074 .108 .100
DEPTH (max.) -.001 -.001 -.002 -.002 -.002 -.002 -.003 -.004 -.004
GROOVE
WIDTH (min.) .084 .092 .110 .119 .125 .133 .156 .179 .189
(Wall to Wall)
DYNAMIC
SQUEEZE (min.) .011 .012 .015 .016 .016 .016 .016 .017 .018
GLAND .042 .048 .054 .059 .062 .066 .078 .098 .100
DEPTH (max.) -.001 -.001 -.002 -.002 -.002 -.002 -.002 -.003 -.003
GROOVE
WIDTH (min.) .082 .094 .105 .114 .121 .128 .150 .178 .179
(Wall to Wall)
DIAMETRAL
CLEARANCE (max.)*

250 psi .005 .006 .007 .007 .007 .007 .008 .010 .010
1000 psi .002 .003 .004 .004 .004 .004 .004 .005 .005
R RADIUS (max.) .010 .013 .015 .015 .015 .020 .020 .020 .020
ECCENTRICITY(max.) .001 .001 .002 .002 .002 .002 .002 .002 .003

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 PRESSURE SEALS, Inc. 81 Commerce Way, South Windsor, CT 06074
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* These maximum diametrical clearances based on 60 Durometer

compound. If harder compound is used, see Chart 6 for relative
maximum clearance.

DESIGN CHART #5 ROTATING SHAFT SEAL

PSI O-Ring Actual Groove Groove Bearing Radial Bearing

Shaft O-Ring Cross Shaft Root Width Length Clear. ID
Size Size ID Section Dia. Dia. W L Max. Tolerance
Number SD RD
-.000
+.000 +.002 .003
1-007 1/8 .145.005 .070.003 .125-.001 .256 .080 5/8 .0008-.001 -.0000-+.0008
1-008 5/32 .176.005 .070.003 .156-.001 .287 .080 5/8 .0008-.001 -.0000-+.0008
1-009 3/16 .208.005 .070.003 .1875-.0014 .318 .080 5/8 .0008-.001 -.0000-+.0008

1-010 7/32 .239.005 .070.003 .2187-.0014 .349 .080 5/8 .0008-.001 -.0000-+.0008
70-270 1/4 .270.005 .070.003 .2500-.0014 .381 .080 5/8 .0008-.001 -.0000-+.0008
1-011 9/32 .301.005 .070.003 .2812-.0014 .413 .080 5/8 .0008-.001 -.0000-+.0008

1-110 5/16 .362.005 .103.003 .3125-.0015 .509 .117 7/8 .001-.00015 -.0000-+.0010
1-111 3/8 .424.005 .103.003 .375-.0015 .572 .117 7/8 .001-.00015 -.0000-+.0010
1-112 7/16 .487.005 .103.003 .4375-.0015 .634 .117 7/8 .001-.00015 -.0000-+.0010

1-113 1/2 .549.005 .103.003 .500-.002 .696 .117 7/8 .001-.00015 -.0000-+.0010
1-114 9/16 .612.005 .103.003 .562-.002 .758 .117 7/8 .001-.00015 -.0000-+.0010
1-115 5/8 .674.005 .103.003 .625-.002 .821 .117 7/8 .001-.00015 -.0000-+.0010

1-116 11/16 .737.005 .103.003 .687-.002 .883 .117 7/8 .001-.00015 -.0000-+.0010
1-211 3/4 .796.006 .139.004 .750-.002 1.016 .157 7/8 .0015-.002 -.0000-+.0012
1-212 13/16 .859.006 .139.004 .812-.002 1.078 .157 7/8 .0015-.002 -.0000-+.0012
1-213 7/8 .921.006 .139.004 .875-.002 1.141 .157 7/8 .0015-.002 -.0000-+.0012

1-214 15/16 .984.006 .139.004 .937-.002 1.203 .157 7/8 .0015-.002 -.0000-+.0012
1-215 1 1.046.006 .139.004 1.000-.002 1.265 .157 7/8 .0015-.002 -.0000-+.0012
1-216 1 1/16 1.109.006 .139.004 1.063-.002 1.329 .157 7/8 .0015-.002 -.0000-+.0012
1-217 1 1/8 1.171.006 .139.004 1.125-.002 1.391 .157 7/8 .0015-.002 -.0000-+.0012
1-218 1 3/16 1.234.006 .139.004 1.188-.002 1.454 .157 7/8 .0015-.002 -.0000-+.0012
1-219 1 1/4 1.296.006 .139.004 1.250-.002 1.516 .157 7/8 .0015-.002 -.0000-+.0012

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 PRESSURE SEALS, Inc. 81 Commerce Way, South Windsor, CT 06074
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DESIGN CHART #6
DIAMETRAL CLEARANCE VS. DUROMETER HARDNESS

SHORE A HARDNESS - 60 DUROMETER

CROSS SECTION .056 .070 .082 .097 .116
.064 .078 .087 .103 .118 .139 .210 .275
250 psi max. .006 .007 .008 .009 .010 .011 .012 .014
500 psi max. .004 .005 .006 .007 .008 .009 .010 .012
1000 psi max. .003 .004 .004 .005 .005 .006 .007 .008
1500 psi max. .002 .002 .002 .003 .003 .004 .005 .006
SHORE A HARDNESS – 70 DUROMETER
CROSS SECTION .056 .070 .082 .097 .116
.064 .078 .087 .103 .118 .139 .210 .275
500 psi max. .007 .008 .009 .010 .011 .012 .014 .016
1000 psi max. .005 .006 .006 .007 .008 .009 .010 .012
1500 psi max. .003 .004 .004 .005 .005 .006 .007 .008
2000 psi max. .002 .002 .002 .003 .003 .004 .004 .0045
2500 psi max. .001 .001 .001 .0015 .002 .002 .0025 .0025
SHORE A HARDNESS – 80 DUROMETER
CROSS SECTION .056 .070 .082 .097 .116
.064 .078 .087 .103 .118 .139 .210 .275
500 psi max. .009 .010 .011 .012 .014 .016 .018 .020
1000 psi max. .007 .008 .009 .010 .011 .012 .014 .016
1500 psi max. .004 .005 .006 .007 .007 .008 .010 .012
2000 psi max. .003 .004 .004 .005 .005 .006 .007 .008
2500 psi max. .002 .003 .003 .004 .004 .005 .006 .007
3000 psi max. .001 .002 .002 .003 .003 .004 .0045 .005
SHORE A HARDNESS – 90 DUROMETER
CROSS SECTION .056 .070 .082 .097 .116
.064 .078 .087 .103 .118 .139 .210 .275
500 psi max. .012 .014 .015 .016 .017 .018 .020 .020
1000 psi max. .010 .012 .013 .014 .015 .016 .018 .018
1500 psi max. .008 .010 .011 .012 .013 .014 .015 .016

Phone: (877)-PSI-SEAL Toll Free, In CT: (860) 282-9100, Fax: (860) 282-9001
 PRESSURE SEALS, Inc. 81 Commerce Way, South Windsor, CT 06074
______________________________________________________________

BRAND RECOMMENDED SUITABLE TEMPERATURE RANGE

NAME TYPE USE BASE Fahrenheit
POLYMERS (Celsius)
Celvacene Cellulose High vacuum to 1 x 10-7 Silicone, Nitrile, Neoprene, -40 to +266
ester & Torr Viton, Butyl, Hydrin (-40 to +130)
castor oil
DC-33 Silicone Vacuum, Extreme Nitrile, Butyl, Viton, Hydrin, -100 to +400
Grease Temperature, Heavy Duty Neoprene (-73 to +204)
DC-44 Silicone Same as above but lighter -40 to +400
Grease duty (-40 to +204)
Do not use on Silicones
DC-55 High vacuum, Extreme Or Fluoro-Silicone -65 to +400
(MIL-G- Silicone Temp. Lubricant (-54 to +204)
4343)

DC-200 Silicone Oil Pneumatic use for High High durometer Nitrile, -65 to +440
(200,000 cps) Pressure and High Speed Neoprene, Viton, Hydrin. (-54 to +227)
Not for silicones.

MCS 352 Skydrol Phosphate Ester Brake and Butyl -65 to +200
Base Grease Hydraulic Systems SBR (-54 to +93)
EPDM

Oxweld NO. Fluorocarbon U-L Approved Nitrile 0 to +250

64 Anti- Base Assembly Oxygen EPDM (-19 to +121)
Friction Compound Systems to Viton
Compound 500 psi Butyl
Petrolatum Petroleum Petroleum Base Nitrile, Acrylic, Viton, -20 to +180
Base Grease Hydraulic Fluids Hydrin, Fluoro-silicones (-29 to +82)
Oil Systems

Pre-Sil Silicone Pneumatic, Nitrile, Butyl, EPDM, Viton, -65 to +400

Lube Lubricant High Pressure & SBR, Neoprene, Hydrin, (-73 to +204)
High Speed Urethane, Acrylic. Not for
silicones.

Versilube Silicone Pneumatic, 3,000 psi. – Nitrile, Neoprene, Viton, -100 to +400
Grease High Speed Acrylic. Do not use on (-73 to +204)
Silicones.

Phone: (877)-PSI-SEAL Toll Free, In CT: (860) 282-9100, Fax: (860) 282-9001