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

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Quantity

Price: $30.61

SKU: 3038-0002-001

Weight : 0.5 lb

Vendor : Dresser

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Description

Dresser · Coupling Gasket

Grade 27 Buna-S Coupling Gasket

Plain Grade 27 Buna-S wedge gaskets for Style 38 and 40 couplings, 1/2 through 24 in, plus #1 insulating adapter gaskets.

Tensile 1,500 PSI Min

212°F Max

Grade 27 Buna-S (SBR)

Shore A 75 ± 5

White Mold Code

0.84-25.80 in Pipe OD

0.15-1.43 lb Weight

Overview

Grade 27 Buna-S is the rubber Dresser uses for most plain gaskets and accepts as standard for most pipeline service. These wedge gaskets replace the gaskets in Dresser Style 38 and 40 bolted couplings when a coupling is re-used or re-gasketed.

Application: Fresh and salt water, natural and other gases, air, most acids, alkaline and sugar solutions and some refrigerants.

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.
Section sizes match the follower and middle ring of each coupling build
#1 insulating adapter gaskets in cast iron sizes

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 (Spec 35)
Hardness	Shore A 75 ± 5
Tensile strength	1,500 PSI minimum (ASTM D412)
Elongation	150% minimum
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 (47 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
2 in CIP - 2.50 in OD	1/2 x 29/32 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 in CIP - 3.80 in OD	#1 Insulating Adapter
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 - 4.80 in OD	#1 Insulating Adapter
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
6 in CIP - 6.90 in OD	#1 Insulating Adapter
7.00 in OD	3/8 x 7/8 in
6 in CIP - 7.10 in OD	1/2 x 1-1/16 in
8.00 in OD	1/2 x 1 in, 3/8 x 7/8 in
8 in CIP - 9.30 in OD	1/2 x 1-1/16 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
10 in CIP - 11.10 in OD	#1 Insulating Adapter, 5/8 x 1-3/16 in
10 in CIP - 11.40 in OD	5/8 x 1-3/16 in
12.00 in OD	1/2 x 1-1/16 in, 1/2 x 1-1/8 in
12 in CIP - 13.20 in OD	#1 Insulating Adapter, 5/8 x 1-3/16 in
14 in - 14.00 in OD	1/2 x 1-3/16 in, 5/8 x 1-3/16 in
14 in CIP - 15.30 in OD	5/8 x 1-3/16 in
16 in - 16.00 in OD	1/2 x 1-3/16 in, 5/8 x 1-3/16 in
16 in CIP - 17.40 in OD	5/8 x 1-3/16 in
18 in - 18.00 in OD	1/2 x 1-3/16 in, 5/8 x 1-3/16 in
18 in CIP - 19.50 in OD	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 1-3/16 in, 5/8 x 1-3/16 in
20 in CIP - 21.60 in OD	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
24 in CIP - 25.80 in OD	5/8 x 1-5/16 in
3.66 in OD	1/2 x 15/16 in
8 in CIP - 9.05 in OD	#1 Insulating Adapter
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 29/23 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.

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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Dresser Grade 27 Buna-S 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 - 3038-0002-001

Description

Data Sheet

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