Stainless Steel Twin-Sphere Molded Rubber Expansion Joints (Series SAMT) are suitable for a range of applications, from industrial plants and waterworks systems to shipyard use. Twin-sphere design offers superior motion absorption capacity to the single-sphere design.
FEATURES
- Applicable for suction and delivery (discharge).
- Designed for greater compression, elongation, and angular movement than the single sphere expansion joint.
- Excellent for absorbing thermal expansion and eliminating sound and vibration.
- Gaskets and packing not required.
- Good electrical insulator.
- Absorbs water pulsation and minimizes water hammering.
APPLICATIONS
- Pressure piping systems in building equipment and general industrial plants.
- Pump and turbine lines used for power generation plants, industrial machinery and universal pump blowers.
- Feed-water & drainage lines for waterworks & sanitary piping systems.
- Pipelines for industrial plants and shipbuilding yards.
DIMENSION & ALLOWABLE MOVEMENTS
| API Part Number | Size | Face To Face Dimensions | Allowable Motion Ratings* Compression | Allowable Motion Ratings* Elongation | Allowable Motion Ratings* Lateral | Allowable Motion Ratings* Angular | Installation Tolerances Compression | Installation Tolerances Elongation | Installation Tolerances Lateral | Installation Tolerances Angular |
|---|---|---|---|---|---|---|---|---|---|---|
| SAMT201H | 1.5 | 7.00 | 2.00 | 1.13 | 1.75 | 35⁰ | 0.25 | 0.13 | 0.31 | 10⁰ |
| SAMT202 | 2 | 7.00 | 2.00 | 1.13 | 1.75 | 35⁰ | 0.25 | 0.13 | 0.31 | 10⁰ |
| SAMT202H | 2.5 | 7.00 | 2.00 | 1.13 | 1.75 | 35⁰ | 0.25 | 0.13 | 0.31 | 10⁰ |
| SAMT203 | 3 | 7.00 | 2.00 | 1.38 | 1.75 | 35⁰ | 0.25 | 0.13 | 0.31 | 10⁰ |
| SAMT204 | 4 | 9.00 | 2.00 | 1.38 | 1.56 | 35⁰ | 0.25 | 0.13 | 0.31 | 10⁰ |
| SAMT205 | 5 | 9.00 | 2.00 | 1.38 | 1.56 | 30⁰ | 0.25 | 0.13 | 0.38 | 10⁰ |
| SAMT206 | 6 | 9.00 | 2.00 | 1.38 | 1.56 | 30⁰ | 0.25 | 0.13 | 0.38 | 10⁰ |
| SAMT208 | 8 | 13.00 | 2.38 | 1.38 | 1.38 | 30⁰ | 0.25 | 0.13 | 0.50 | 10⁰ |
| SAMT210 | 10 | 13.00 | 2.38 | 1.38 | 1.38 | 30⁰ | 0.25 | 0.13 | 0.50 | 10⁰ |
| SAMT212 | 12 | 13.00 | 2.38 | 1.38 | 1.38 | 20⁰ | 0.25 | 0.13 | 0.50 | 10⁰ |
| SAMT214 | 14 | 13.75 | 1.56 | 1.13 | 1.13 | 20⁰ | 0.25 | 0.13 | 0.31 | 10⁰ |
| SAMT216 | 16 | 13.75 | 1.56 | 1.13 | 1.13 | 20⁰ | 0.25 | 0.13 | 0.31 | 10⁰ |
| SAMT218 | 18 | 13.75 | 1.56 | 1.13 | 1.13 | 20⁰ | 0.25 | 0.13 | 0.31 | 10⁰ |
| SAMT220 | 20 | 13.75 | 1.56 | 1.13 | 1.13 | 20⁰ | 0.25 | 0.13 | 0.31 | 10⁰ |
| SAMT224 | 24 | 13.75 | 1.56 | 1.13 | 1.13 | 20⁰ | 0.25 | 0.13 | 0.50 | 10⁰ |
*Non Concurrent Ratings.
Warning: Do NOT elongate rubber expansion joints when installing for suction service.
OPERATING CONDITIONS
| Size Range | 1.5” - 12” | 14” - 24” |
|---|---|---|
| Operating Pressure | up to 214 psi | up to 114 psi |
| Operating Temp. Range* | 14⁰-170⁰ F (Neoprene) 14⁰-210⁰ F (EPDM) | 14⁰-170⁰ F (Neoprene) 14⁰-210⁰ F (EPDM) |
| Burst Pressure | 853 psi | 340 psi |
| Vacuum Rating* | Contact API Sales | Contact API Sales |
*Warnings:
- Pressure ratings listed in the above table are for up to 110 Degrees F (for Neoprene), and 125 Degrees F (for EPDM). For elevated temperature service, please contact API Sales for actual working pressure ratings.
- Limit rods are required in systems that are unanchored and recommended in all other applications.
MATERIALS
| Part | Part Description | Material |
|---|---|---|
| 1 | Flanges | Stainless Steel |
| 2 | Reinforcement Fabric | Synthetic Fiber |
| 3 | Reinforcing Wire | Mild Steel Strands |
| 4 | Tube | Synthetic Rubber |
| 5 | Cover | Synthetic Rubber |
| 6 | Root Ring | Mild Steel - Plated |
