• Dutco Tennant LLC, PO Box 233, Dubai, U.A.E.
Grooved Coupling HVAC Products


The Coupling housing is designed to self-center around the pipe. The housing encircles and retains the gasket against the application of internal system pressure or vacuum.

The housing key sections fit into and engage the pipe-end grooves around the entire pipe circumference, thus restraining the pipe ends from separation due to the application of internal pressure.

Flexible Couplings provide designed-in clearances between the housing key sections and the pipe grooves to permit both angular and longitudinal movement of the pipe.

Rigid couplings grip the pipe and lock the joint into position

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  • Rigidity or flexibility
  • Self restrained joint
  • Union at every joint
  • Stress-free system
  • Minimizes noise & vibration
  • Accommodates misalignment and joint deflection
  • UL / FM Approved
BOLTS SAE J429, Grade 5, Zinc Electroplated ISO 898-1, Class 8.8, Zinc Electroplated followed by a Yellow Chromate Dip
HEAVY HEX NUTS ASTM A563, Grade A, Zinc Electroplated ISO 898-2, Class 8.8, Zinc Electroplated followed by a Yellow Chromate Dip
STAINLESS STEEL BOLTS & NUTS 304SS bolts and nuts are available as a standard option.(316SS are available for special order).
HOUSING Ductile Iron conforming to ASTM A 536, Grade 65-45-12
  • Rust inhibiting paint – Color: ORANGE (standard)
  • Hot Dipped Zinc Galvanized (optional)
  • Other Colors Available (IE: RAL3000 and RAL9000)
  • C Style (1" - 30")
  • Flush Gap (1" - 24")
  • Standard
WORKING PRESSURE, END LOAD, PIPE END SEPARATION & DEFLECTION FROM CENTER LINE Based on standard wall steel pipe with cut or roll grooves