Grooved piping system is reliable and is faster to install than welding, threading or flanging, resulting in lowest installed cost. It can be adopted to suit standard pipe with cut grooves or standard And light wall pipe with rolled grooves. Triple sealing of the C-shaped pressure responsive gasket is made from specially compounded rubbers with low compression set property. Couplings perform equally well under pressure and vacuum. Couplings with Tri-seal gaskets are highly suitable for Higher vacuum service and dry systems subject to freezing. Couplings are available for flexible and rigid system.

Housings
Ductile iron housing segments conforming to ASTM-A 536 Grade 65-45-12 fully enclose the gasket. The housing keys engage into the grooves around the full pipe circumference, securing the pipe ends together with a positive grip. Housings are normally two identical castings for couplings through 12" (323.9 mm) sizes. From 14" (355.6 mm) up sizes, coupling housings are cast in multiple identical segments to ensure concentricity and easy handling. The housing is designed to provide the optimum combination of pressure, stress relief and end load conditions while maintaining reasonable weight and manufacturing characteristics. Every grooved pipe coupling , flange adaptor, reducing coupling has a similar key section. This engages fully into the groove tying the joint integrally to the pipe.

Gaskets
The sealing efficiency of gaskets is such that the Gasket forms an initial seal as it is stretched over the pipe Ends. As the housing segments are installed and secured the pressure responsive gasket is slightly compressed to form a leak-tight joint. The strength of the seal is further enhanced by internal line pressure that creates downward pressure on the lips of the gasket. The gasket also seals well under vacuum conditions up to 10inHg (-0.35 Bar) which may occur when a system is drained. Please refer to the Gasket selection guide for additional details and gasket materials. Gasket are pre-lubricated for easy assembly of coupling.

Bolts and Nuts
Oval neck track bolt conforming to ASTM A183 with minimum tensile strength of 110,000 psi or square neck carriage bolt to ASTM A446 with 120,000 psi minimum tensile strength permits tightening of the nuts from one side with a single wrench. Nuts conform to ASTM A194. Bolts & Nuts are electro galvanized.