Cut Gasket Products

A gasket is a mechanical seal which fills the space between two or more mating surfaces, generally to prevent leakage from or into the joined objects while under compression. Gaskets allow for "less-than-perfect" mating surfaces on machine parts where they can fill irregularities. Gaskets are commonly produced by cutting from sheet materials.

Cut Gaskets—MSI Supply, Inc. Get A Quote

 

 

It is usually desirable that the gaskets be made from a material that is compressible such that it tightly fills the space it is designed for, including any slight irregularities. The most common misconception when selecting a cut gasket is to choose a gasket that is too thick. The thicker the material the more likely the material being contained can weep through the pores of the gasket itself. This is a greater issue with some materials than others.  A rule of thumb is to have the material thick enough to compensate for any surface face irregularities and to permit some compression. 

Inventory

MSI stocks a wide range of gaskets and can have non-stock sizes quickly made to order.  The following will commonly be available for same-day or next-day delivery.  Quantities may affect lead times.

Size Range:

1/4" to 60" Diameter 

Class:

150 – 2500

Materials:

Non-Asbestos, Neoprene, Durabla, Garlock, Teflon

 

Gaskets

As well as providing products cut to recognized industry standards, MSI Supply can also cut gaskets based on your drawing or sample of the gasket you desire. Many factors are taken into consideration when helping you select the right product including temperature, application, media and pressure. MSI Supply stocks a wide range of competitively priced, industrial grade gaskets to meet varying specific applications such as high temperature, low load, high torque and high pressure. A comprehensive range of rubber, non-asbestos, virgin and modified PTFE, and graphite grades (industrial and high purity) in sheet, roll and cut gasket forms are available in stock. If you have a cut gasket application that requires more than traditional solutions, let our team of cut gasket professionals help.

Ordering Information

There are some need-to-know details when purchasing cut gaskets, such as: diameter, face type, pressure, material, and material thickness. 

Pressure Class

Corresponding to flange pressure classes, Cut gaskets are available in 150, 300, 600, 900, 1500, and 2500 pressure classes.  

Thickness

Most materials used to stamp cut gaskets are available in either 1/16” or 1/8” thick variations.

Series A vs Series B

Large bore flanges (above NPS 24") to ASME B16.47-Serie A or MSS-SP 44 are heavier/stronger than the ASME B16.47-Series B in the same size and pressure rating. In most end-users piping specifications the Series A is specified, which can withstand more external loadings than the Series B type. For both series, the dimensions are different. From a commercial point of view, the series B type may be selected for piping with a non-critical application.

Face Type

Cut gaskets may be made to suit either full face or raised face flanges.  Since the gasket must span the entire sealing surface of the flange, it is easy to distinguish a full-face gasket from a raised-face gasket (see image below).  When utilized, full face gaskets are generally supplied for 150 and 300 class flange sealing.

Full Face Gasket Raised Face Gasket
Full Face

Raised Face (also referred
to as a ring gasket)

 

Material Information

When a sheet of material has the gasket shape "punched out" of it, it is a sheet gasket. This can lead to a crude, fast and cheap gasket. In previous times the material was compressed asbestos, but in modern times a fibrous material such as graphite is used. These gaskets can fill various and different chemical requirements based on the inertness of the material used. Non-asbestos gasket sheet is durable, of multiple materials, and thick in nature. Material examples are mineral, carbon or nitrile synthetic rubber. Applications using sheet gaskets involve acids, corrosive chemicals, steam or mild caustics. Flexibility and good recovery prevent breakage during installation of a sheet gasket.

The following chart shows different manufacturer's names for equivalent gasket materials for three classes of gasket sheeting; Compressed Synthetic Gasketing (CSG), PTFE Sheet, and Flexible Graphite Sheet.

Compressed Synthetic Gasketing (CSG)

Color

Binder

Fiber

Garlock

Thermoseal-Klinger

Teadit

Durabla

Dark Gray

NBR

In-organic / Aramid

5500

C4439

NA 1090

No Equal

Black

Neoprene

Aramid

3300

C5400 / C5401

NA 1076

8700

Black

NBR

In-organic

ST 706

No Equal

NA 1122

No Equal

Green

NBR

Aramid

2900

C4401

NA 1001

8500

Off-white

NBR

Aramid

2900

C4401

NA 1001

8500

Off-white

SBR

Aramid

3200 / 3400

C6400 / C6401

NA 1020

8600

Blue

NBR

Aramid

3000

C4401

NA 1085

8500

Graphite

NBR

Aramid / Wire

No Equal

C4408

NA 1000M

No Equal

Black

NBR

Graphite / Aramid

No Equal

No Equal

No Equal

No Equal

Black

NBR

Carbon

9850

C4500

NA 1100

8300

Blue

NBR

Glass

No Equal

C4430

No Equal

No Equal

 

PTFE Sheet

Color

Binder

Filler

Garlock

Thermoseal-Klinger

Flexitallic

Teadit

Durabla

Fawn

PTFE

Silica

3500

No Equal

511

1590

 No Equal

Blue

PTFE

Glass Microsphere

3504

No Equal

500

1570

Durlon 9000

Off-white

PTFE

Barium Sulfate

3510

No Equal

533

1580

9200W

White

PTFE

Expanded Virgin PTFE

3545

Soft Chem

600

Quimflex SH

9600

 

Flexible Graphite Sheet

Insert

Graftech

SGL Polycarbon

Garlock

Thermoseal-Klinger

None

GTB

B-Lam

3123 / 3125

HL

.002” 316ss Foil

GHR

BSSC

3125 SS

SLS

.004” Tanged 316ss

GHE

BTCSS

3125 TC

PSM