Twin-Sphere Molded Rubber Expansion Joints

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Twin Sphere Molded Rubber Expansion Joints (Series AMT)

Twin-Sphere Molded Rubber Expansion Joints (Series AMT) are suitable for reducing sound and vibration in suction and delivery applications. This twin sphere design includes ANSI Class #150 drilled flanges, but may be customized with ANSI Class #300 and DIN-rated flanges.

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 NumberSizeFace To Face DimensionsAllowable 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
AMT010017.001.500.751.2535⁰0.250.130.3110⁰
AMT01501.57.002.001.131.7535⁰0.250.130.3110⁰
AMT020027.002.001.131.7535⁰0.250.130.3110⁰
AMT02502.57.002.001.131.7535⁰0.250.130.3110⁰
AMT030037.002.001.381.7535⁰0.250.130.3110⁰
AMT040049.002.001.381.5635⁰0.250.130.3110⁰
AMT050059.002.001.381.5630⁰0.250.130.3810⁰
AMT060069.002.001.381.5630⁰0.250.130.3810⁰
AMT0800813.002.381.381.3830⁰0.250.130.5010⁰
AMT10001013.002.381.381.3830⁰0.250.130.5010⁰
AMT12001213.002.381.381.3820⁰0.250.130.5010⁰
AMT14001413.751.561.131.1320⁰0.250.130.3110⁰
AMT16001613.751.561.131.1320⁰0.250.130.3110⁰
AMT18001813.751.561.131.1320⁰0.250.130.3110⁰
AMT20002013.751.561.131.1320⁰0.250.130.3110⁰
AMT24002413.751.561.131.1320⁰0.250.130.5010⁰

*Non Concurrent Ratings.

Warning: Do NOT elongate rubber expansion joints when installing for suction service.

PART NUMBER SCHEME

Part Number SectionOptions
TypeAMT = Twin Sphere Flanged Expansion Joint (Steel)
SizeXXXX = Size in inches going out 2 decimal places
Body MaterialNE = Neoprene
EP = EPDM
BN = Buna-N
Flange MaterialSTL = Steel
Class150 = 150# Drilling
300 = 300# Drilling
P16 = DIN PN16 Drilling
ExampleAMT0200-NE-STL-150 = 2" Twin Sphere Expansion Joint with Neoprene Body and Steel Flanges with 150# Drill Pattern

OPERATING CONDITIONS

Size Range1-1/2” - 12”14” - 24”
Operating Pressureup to 214 psiup to 114 psi
Operating Temp. Range*14⁰-170⁰ F (Neoprene)
14⁰-210⁰ F (EPDM)
14⁰-170⁰ F (Neoprene)
14⁰-210⁰ F (EPDM)
Burst Pressure853 psi340 psi
Vacuum Rating*Contact API SalesContact 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

PartPart DescriptionMaterial
1FlangesMild Steel - Plated
2Reinforcement FabricNylon
3Reinforcing WireMild Steel
4TubeSynthetic Rubber
5CoverSynthetic Rubber
6Root RingMild Steel Plated
Note: Customized for flanges ANSI-150, ANSI-300 and DIN
AMT Series Twin Sphere Rubber Expansion Joints - Flange x Flange-Drawing