Dresser Gasket — Style 65 | Replacement Gasket for Style 65 Galvanized Compression Fittings

Galvanized Compression Fittings | Grade 27 BUNA-S Armored Standard | Steel Pipe | Max 150°F | Up to 2 in Nom.

Overview

The Dresser Style 65 Gasket is the factory-specified replacement sealing element for Dresser Style 65 Galvanized Compression Fittings — the small-diameter coupling and fitting system that has been used in natural gas distribution, industrial piping, and residential mechanical systems since Dresser introduced the compression fitting principle in 1891. The Style 65 gasket is unique among Dresser gaskets in that Grade 27 BUNA-S Armored is supplied as standard with all Style 65 fittings (not plain BUNA-S), with Grade 42 Armored available for oil and hydrocarbon service on request.

The Style 65 system installs on plain-end pipe — no threading, flaring, or soldering required. The compression gasket is compressed around the pipe OD by the end nut and the fitting body taper, producing a flexible, vibration-absorbing, leak-proof seal. Because the sealing action is on the pipe OD rather than at a threaded connection, the full pipe wall thickness is maintained at every joint — threading removes approximately 40% of pipe wall thickness, which the Style 65 system entirely avoids. Style 65 is available as couplings, 90° ells, and male and female adapters in regular and long body configurations.

? TEMPERATURE LIMIT — 150°F MAXIMUM: Style 65 galvanized compression fittings and their gaskets must not be used at temperatures above 150°F. For higher-temperature applications, consult Dresser for alternative coupling styles with EPDM or other high-temperature gasket compounds.

What Is the Dresser Style 65 Compression Fitting?

The Dresser Style 65 is a galvanized compression coupling and fitting system for plain-end steel pipe up to 2 in nominal pipe size. Fitting bodies are constructed of malleable iron (conforming to ANSI specifications for 150 PSI rated fittings) or steel, with galvanized finish as standard. The system employs the same wedge-compression gasket sealing principle used in Dresser's full-size bolted couplings — the end nut compresses the gasket against the pipe OD and the fitting body taper simultaneously as the nut is tightened, producing a double-sealing action that requires no sealant, no thread compound, and no flare. The fitting ships assembled and ready to install; loosen the end nuts, stab pipe into both ends, and tighten — no special tools required.

Key Features

• Armored Grade 27 BUNA-S Supplied as Standard: All Style 65 fittings ship with Grade 27 Armored gaskets as standard. The brass coil armor adds rigidity to the gasket lip and provides metal-to-metal electrical continuity through the joint for cathodic protection requirements.
• No Threading, Flaring, or Sealant Required: Plain-end pipe installation — preserves full pipe wall thickness at every joint. No hot work, no thread compound, no flame required.
• Vibration and Movement Absorption: Resilient gasket construction absorbs expansion, contraction, and vibration at every joint — prevents stress cracking at pipe connections from thermal cycling or mechanical vibration.
• Ships Assembled and Ready to Install: All Style 65 compression fittings ship assembled. Loosen nuts, stab pipe, tighten to specified torque. No disassembly or preparation beyond pipe cleaning required.
• 150 PSI Rated: Malleable iron fitting bodies conform to ANSI specifications for 150 PSI rated fittings. Steel bodies available for higher-pressure applications on request.
• Grade 42 Armored Available: For natural gas, fuel oil, and hydrocarbon service where the standard BUNA-S compound's chemical resistance may not be adequate.
• Galvanized Finish Standard: External corrosion protection for long service life in atmospheric exposure, underground, or damp service conditions.

Gasket Specifications

Questions? Contact us at sales@watermainsupply.com or call 281.664.8000.

Style 65 Data Sheet

Gasket Shelf Life Technical Bulletin

Dresser Gaskets Overview