Expansion Joints
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Mercer carries a full range of Expansion Joints to suit any process plant application including thermal expansion, vibration absorption and noise reduction in piping and flue systems. Our website includes a limited selection of our most popular joints: Economy, Premium and Teflon®. For high temperature (>400F) or high pressure applications, call to ask about our range of Metal Joints. |
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Our most economical full-pressure joint. A molded joint with
1 through 4 arches and large movement per arch. Arches may
be filled or unfilled. Sizes from 11/2 in. to 24 in.
Standard 150# ASA drilling. Up to 400F operating temperature
depending on material. Up to 150 psi working pressure
depending on size. Vacuum rating up to 25 in. Hg depending
on size. The following table covers our single arch economy
joint in sizes 11/2 in. through 12 in.
For greater axial movement call about our multiple arch
joints. For greater working pressure and vacuum rating or
for custom face-to-face distance and drilling-see our
premium joints below.
| Pipe Size (in.) |
Face to Face (in.) |
Axial Com- |
Axial Exten- |
Lateral Deflection (in.) |
Angular Rotation (deg.) |
Torsional Rotation (deg.) |
Rated Working Pressure (psi) |
Min. Burst Pressure (psi) |
Vacuum Rating (in. Hg) |
|---|---|---|---|---|---|---|---|---|---|
1 1/2 |
6 |
1 3/4 |
3/4 |
3/4 |
25 |
3 |
150 |
600 |
15 |
2 |
6 |
1 3/4 |
3/4 |
3/4 |
25 |
3 |
150 |
600 |
15 |
2 1/2 |
6 |
1 3/4 |
3/4 |
3/4 |
25 |
3 |
150 |
600 |
15 |
3 |
6 |
1 3/4 |
3/4 |
3/4 |
20 |
3 |
150 |
600 |
15 |
4 |
6 |
1 3/4 |
3/4 |
3/4 |
20 |
3 |
150 |
600 |
15 |
5 |
6 |
1 3/4 |
3/4 |
3/4 |
18 |
3 |
150 |
600 |
15 |
6 |
6 |
1 3/4 |
3/4 |
1 |
16 |
3 |
150 |
600 |
15 |
8 |
6 |
1 3/4 |
3/4 |
1 |
11 |
3 |
150 |
600 |
15 |
8 |
8 |
1 3/4 |
3/4 |
1 |
11 |
3 |
150 |
600 |
15 |
10 |
8 |
1 3/4 |
3/4 |
1 |
10 |
3 |
150 |
600 |
15 |
12 |
8 |
1 3/4 |
3/4 |
1 |
9 |
3 |
150 |
600 |
15 |
A very versatile, robust,
hand-made joint available with 1 through 4 arches. Arches
may be filled or unfilled. Sizes from 1/2 in. to 144 in.
with custom face-to-face distances. Available with any
drilling configuration. Up to 400F operating temperature
depending upon material. Standard working pressures to 250
psi depending on size (higher pressures available). Vacuum
rating up to 30 in. Hg for all sizes. Also available
Teflon®-lined for aggressive chemical environments. The
following table covers our single arch premium joint in
sizes 2 in. through 12 in.
For greater movement call about our multiple arch joints.
Larger sizes, higher working pressure, custom face-to-face
distances and Teflon® lining available.
| Pipe Size (in.) |
Std Face-to- Face (in.) |
Axial Com- pression (in.) |
Lateral Deflec- tion (in.) |
Angular Rotation (deg.) | Torsional Rotation (deg.) | Std Working Pres. (psi) | Min. Burst Pres. (psi) | Vacuum Rating (in. Hg) |
|---|---|---|---|---|---|---|---|---|
| 2 | 6 | 3/4 | 1/2 | 14.5 | 3 | 165 | 660 | 30 |
| 2 1/2 | 6 | 3/4 | 1/2 | 11.5 | 3 | 165 | 660 | 30 |
| 3 | 6 | 3/4 | 1/2 | 10.0 | 3 | 165 | 660 | 30 |
| 4 | 6 | 3/4 | 1/2 | 7.5 | 3 | 165 | 660 | 30 |
| 5 | 6 | 3/4 | 1/2 | 6.0 | 3 | 140 | 560 | 30 |
| 6 | 6 | 3/4 | 1/2 | 5.5 | 3 | 140 | 560 | 30 |
| 8 | 6 | 3/4 | 1/2 | 5.0 | 3 | 140 | 560 | 30 |
| 10 | 8 | 1 | 5/8 | 4.5 | 3 | 140 | 560 | 30 |
| 12 | 8 | 1 | 5/8 | 3.8 | 3 | 140 | 560 | 30 |
Teflon-based materials are able to withstand significantly more aggressive chemical environments (including highly oxidizing environments) than standard non-asbestos gasket materials. However their temperature, pressure and mechanical performance is inferior to standard non-asbestos gasket materials. Metal inserted and expanded PTFE are able to operate at higher pressures.
| Material |
Max T (F) |
Max P (psi) |
Creep Rel'n (%) |
Applications/Features |
|---|---|---|---|---|
| Pure PTFE | 500 | 800 | 35 - 55 | Excellent chemical resistance. |
| Filled PTFE | 500 | 1200 | 11 - 40 | Excellent chemical resistance. |
| Filled PTFE - Metal Inserted | 500 | 2500 | 20 | Excellent chemical resistance. 316 SS perforated core. |
| Expanded PTFE | 600 | 3000 | 30 | Excellent chemical resistance. Highly compressible. |
Mercer Gasket & Shim
Interstate Industrial Park, 110 Benigno Boulevard
Bellmawr, NJ 08031
ISO 9001:2000 certified
On call 24 hours!
(800) 210-5000
Fax: (856) 931-6400
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