Dresser Grade 27 Buna-S armored wedge gasket
Dresser Grade 27 Buna-S Armored Gasket dimension drawing
Dresser Grade 27 Buna-S Armored Gasket dimension drawing
Dresser Grade 27 Buna-S Armored Gasket specification table
Dresser Grade 27 Buna-S Armored Gasket specification table
Dresser Grade 27 Buna-S Armored Gasket specification table
Dresser Grade 27 Buna-S Armored Gasket specification table
Dresser Grade 27 Buna-S armored wedge gasket
Dresser Grade 27 Buna-S Armored Gasket dimension drawing
Dresser Grade 27 Buna-S Armored Gasket dimension drawing
Dresser Grade 27 Buna-S Armored Gasket specification table
Dresser Grade 27 Buna-S Armored Gasket specification table
Dresser Grade 27 Buna-S Armored Gasket specification table
Dresser Grade 27 Buna-S Armored Gasket specification table

Dresser Grade 27 Buna-S Armored Gasket - 1/2 in to 24 in

Nominal Size - OD: 1/2 in - 0.84 in OD
Section - Part No.: 9/32 x 9/16 in - 3038-0002-039-D

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$46.17
SKU: 3038-0002-039-D
Weight : 0.5 lb
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Description
Dresser · Coupling Gasket
Grade 27 Buna-S Armored Coupling Gasket
Armored Grade 27 wedge gaskets for Style 38 and 40 couplings where cathodic protection current must pass, 1/2 through 24 in.
212°F Max
Grade 27 Buna-S (SBR)
Armored: Brass Coil in Tip
Shore A 75 ± 5
For Cathodic Protection
0.84-24.00 in Pipe OD
0.5-0.5 lb Weight
Overview

Armored gaskets carry a brass coil molded into the gasket tip. The armor bites into the pipe for metal-to-metal contact, so the joint passes cathodic protection current, and it shields the rubber from the line content without reducing the seal.

Application: Coupled steel lines under cathodic protection that need low-resistance joints.

  • Wedge gaskets for Dresser Style 38 and Style 40 bolted couplings (Style 40 uses Style 38 followers and gaskets) on plain-end steel pipe; CIP sizes fit couplings for cast and ductile iron.
  • Grade 27 Buna-S rubber, Dresser standard compound
  • Brass armor is molded in, not added
What Ships and What It Needs to Run

Included: one gasket per part number.

Coupling or fitting parts, by others: followers, bolts and middle rings are not included unless named in the option.

Genuine Dresser equipment, factory-new in original packaging — sold and supported by Watermain Supply, an independent industrial supplier.
12-Month Dresser Warranty

Covered for 12 months from the date of purchase under Dresser’s published warranty terms.

Specifications
Material SBR Buna-S, Grade 27, with molded brass armor
Hardness Shore A 75 ± 5
Max temperature 212°F
Max pressure Per the coupling it is installed in

Dresser gasket grade overview and Grade 27 submittal, 2021.

Gasket Grades
Grade Rubber Max temperature Max pressure Mold code
27 SBR Buna-S 212°F Per coupling rating White
41 Natural 212°F Per coupling rating Dark green
42 Buna-N nitrile 212°F Per coupling rating Yellow
224 Fluorocarbon (Viton) 350°F 100 PSI Brown/tan
365 Graphite fiber 1,200°F None (may not seal leak-tight) —

Dresser gasket grade overview, 2021. In Style 65, 88 and 90 compression fittings the maximum is 150°F.

Storage: Dresser rubber gaskets keep five years or more on the shelf stored cool (32 to 80°F), dark and away from ozone, sunlight and weather, lying in their normal ID-OD position with nothing stacked on them.

Sizes
All sizes (29 rows)
Nominal Size - OD Section
1/2 in - 0.84 in OD 9/32 x 9/16 in
1-1/2 in - 1.90 in OD 11/32 x 5/8 in
2.00 in OD 9/32 x 9/16 in
3.00 in OD 1/2 x 29/32 in, 3/8 x 7/8 in
3 in - 3.50 in OD 1/2 x 29/32 in, 3/8 x 7/8 in
3-1/2 in - 4.00 in OD 1/2 x 29/32 in, 3/8 x 7/8 in
4 in - 4.50 in OD 1/2 x 29/32 in, 3/8 x 7/8 in
4 in CIP - 5.00 in OD 1/2 x 29/32 in, 3/8 x 7/8 in
5.50 in OD 1/2 x 29/32 in, 3/8 x 7/8 in
6.00 in OD 1/2 x 1 in, 1/2 x 1-1/8 in, 3/8 x 7/8 in
3/4 in - 1.05 in OD 9/32 x 9/16 in
1-1/4 in - 1.66 in OD 9/32 x 9/16 in
10.00 in OD 1/2 x 1-1/16 in, 1/2 x 1-1/8 in
12.00 in OD 1/2 x 1-1/4 in, 1/2 x 1-1/8 in
14 in - 14.00 in OD 1/2 x 1-1/8 in, 5/8 x 1-3/16 in
16 in - 16.00 in OD 1/2 x 1-1/8 in, 5/8 x 1-3/16 in
18 in - 18.00 in OD 1/2 x 1-1/8 in, 5/8 x 1-3/16 in
2.25 in OD 1/2 x 29/32 in
20 in - 20.00 in OD 1/2 x 1-1/8 in, 5/8 x 1-3/16 in
22 in - 22.00 in OD 1/2 x 1-3/16 in, 5/8 x 1-3/16 in
24 in - 24.00 in OD 1/2 x 1-3/16 in, 5/8 x 1-3/16 in
1 in - 1.32 in OD 9/32 x 9/16 in
10 in - 10.75 in OD 1/2 x 1-1/16 in, 5/8 x 1-3/16 in
12 in - 12.75 in OD 1/2 x 1-1/16 in, 5/8 x 1-1/8 in, 5/8 x 1-3/16 in
2 in - 2.38 in OD 1/2 x 29/32 in, 3/8 x 3/4 in
2-1/2 in - 2.88 in OD 1/2 x 29/32 in
6 in - 6.63 in OD 1/2 x 1 in, 1/2 x 1-1/8 in, 3/8 x 7/8 in
7.63 in OD 1/2 x 1 in
8 in - 8.63 in OD 1/2 x 1-1/16 in, 3/8 x 7/8 in

Sizes as listed in Dresser’s 2026 price lists; the picker shows the part number for each build.

Before You Order. Match the pipe OD and the gasket section to the coupling or fitting; the part number is on the old gasket and in the coupling submittal. Non-stock Dresser parts are not returnable without Dresser’s authorization, and ship time is confirmed when you order. Custom builds (other sizes, widths, gaskets or materials) are available: email sales@watermainsupply.com with the pipe OD, material and line content.
For engineering-led sizing and selection support or a factory submittal, email sales@watermainsupply.com or call 1-888.510.4036.
© Watermain Supply — A division of E4 Industrial LLC
Data Sheet
Grade 27 Gasket Submittal (2021) Gasket Grade Overview (2021) Gasket Selection and Chemical Compatibility Gasket Shelf Life and Storage Bulletin Style 38 Steel Pipe Coupling Submittal (2021)
Videos

Product videos are being added to this listing. For a walkthrough in the meantime, email sales@watermainsupply.com.

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