Matco-norca gna3 Non-asbestos Ring Gasket 3 in 150 Lb

Product Description

The MATCO-NORCA gna3 is a 3-inch, 150 LB class non-asbestos ring gasket designed for flanged pipe connections in plumbing, mechanical, and light industrial piping systems. At 1/16 inch thick with an outer dimension of 3-1/2 inches by 5-3/8 inches, this ring gasket provides a reliable, compressible seal between mating flanges. The non-asbestos construction meets modern material safety requirements while delivering consistent sealing performance under standard 150 LB flange pressure ratings. Licensed plumbers and pipefitters typically install this type of gasket during flange assembly or when re-gasketing existing joints.

This gasket is sized for 3-inch nominal pipe with a 150 LB flange rating, making it suitable for residential and commercial water, steam, and general-service piping systems where ring-type flange gaskets are specified. It is installed between raised-face or flat-face flanges and compressed by flange bolting to form a leak-tight joint. The compact ring profile fits within the bolt circle, which is standard practice for 150 LB raised-face flange applications.

Key Features

• Non-asbestos material construction meets current safety and environmental standards
• 3-inch nominal pipe size at 150 LB pressure class rating
• 1/16 inch thickness provides appropriate compression for standard 150 LB flanges
• Ring gasket profile sized at 3-1/2 inches by 5-3/8 inches for proper bolt-circle fitment
• Suitable for water, steam, and general-service flanged piping applications

Compatibility

Designed as an OEM-style replacement ring gasket for 3-inch nominal, 150 LB class flanged piping systems using standard ring-type gasket configurations.

Installation Notes

Installation is typically performed by a licensed plumber or pipefitter in accordance with applicable mechanical and plumbing codes. Shut off and depressurize the piping system completely before breaking any flanged joint. Clean flange faces of old gasket material and surface debris before seating the new gasket. Tighten flange bolts in a cross-pattern sequence to achieve even compression across the gasket face.

Technical Specifications

• Nominal Pipe Size: 3 inches
• Pressure Class: 150 LB
• Gasket Thickness: 1/16 inch
• Outer Dimensions: 3-1/2 inches x 5-3/8 inches
• Material: Non-Asbestos
• Gasket Type: Ring

Standard Information

• Brand: MATCO-NORCA
• Manufacturer Part Number: gna3