How do you measure seals?

Why don’t you have an on-line catalog?

What is a PTFE Seal?

What kind of material should I use for this application?

How do you identify the material of a seal?

Can you duplicate this seal kit?

How soon can I get my parts?

How do you measure seals?

The dimensions that need to be measured on a seal are the ID, OD and the width, or the thickness.

The following is a general guideline for measuring some of the most basic seal designs. The following examples are general guidelines and are not all inclusive.

Oil Seals Identifying the manufacturer of an oil seal can be difficult, however many manufacturers stamp the dimensions on the seal. The numbers shown on the seal indicate the size. 70 90 10 shows the shaft of 70mm, the bore is 90mm and the width or height is 10mm. Some seals have different sealing lip configurations, such as single or double.

O-Rings Two dimensions are also needed for measuring o-rings correctly. The inside diameter and the cross section (thickness) of the o-ring.

There are too many sealing types and variations to address all sealing configurations, please call our seal specialists for further assistance.

Why don’t you have an on-line catalog?


MSP Seals specializes in our personal customer service. We feel that utilizing a catalog adds expense and takes away our noted personal service. Although we can cross reference from many of our competitor’s catalogs.

MSP Seals, Inc.’s focus is on quality product and customer satisfaction. Contact one of our Seal Specialists to help you find the sealing solution for your project needs.

What is a PTFE Seal?


A PTFE seal is a synthetic fluoropolymer of tetrafluoroethylene with numerous applications. PTFE is a fluorocarbon solid, as it is a high-molecular weight compound consisting wholly of carbon and fluorine. It is hydrophobic: neither water nor water-containing substances wet PTFE.

PTFE can be loaded with:

  • glass
  • carbon
  • graphite
  • bronze
  • MOS2
  • or any of the other fillers available to enhance the performance of your seals.

These PTFE materials are used in all industries and many different types of seals. Typical applications are rod and piston seals for fluid power cylinders, o-rings, lantern rings, SS spring loaded u-cups, PTFE lipped oil seals and many special engineered seals.

Contact our PTFE Specialists at MSP Seals.

What kind of material should I use for this application?

The material selection for a seal is based on what the application is for the seal. The following is a general idea of the materials that can be used and should be used as a general guideline only, but will give an idea of general information about materials:

General Elastomer Information :

Base Polymer Nitrile(BUNA, NBR) Polyacrylate Silicone Fluoroelastomer
Temperature Range* -50°F ~ 250°
-45°C ~ 125°		 -20°F ~ 300°
-30°C ~ 150°C		 -80°F ~ 400°
-60°C ~ 200°C		 -30°F ~ 400°
-35°C ~ 200°
Oil Resistance VG VG G VG
Acid Resistance G F F F
Alkali Resistance G NR NR F
Water Resistance G F G G
Heat Resistance G VG VG VG
Cold Resistance G F G F
Wear Resistance VG VG G VG
Ozone Resistance G VG VG VG

* Maximum temperature are limits, dependent on other operating conditions, and are not a consistent temperature run.

VG – Very good
G – Good for most applications
F – Fair, can be used if no other materials available but otherwise not recommended
NR – Not recommended

NOTES:
1. Phosphate Ester and Water Glycol hydraulic fluids are not included in the Table
2. Water resistance includes steam. No material is ideally compatible, as lubricity of water is very poor.
3. PTFE, Ethylene Acrylate, and other elastomers are available.


Every Seal application is different; the above information is a general guideline to get development started. Temperature range is a general guideline, maximum temperature are limits and are not a consistent temperature run. Each material should be confirmed to its specific application. Contact one of our seal specialists for guidance in your sealing needs and the most accurate information regarding your seal and your seal’s application.

How do you identify the material of a seal?


The application of the seal is the first indication of the material of a seal. Additional testing can be done to determine exact material composition.

Our sales department can help you select the best sealing material for your application.

MSP Seals, Inc.’s focus is on quality product and customer satisfaction. Contact one of our Seal Specialists to help you find the sealing solution for your project needs.

Can you duplicate this seal kit?

 

MSP Seals assembles seal kits in custom or standard configurations. We are experienced in developing kitting programs for OEM aftermarket requirements and providing you with service repair kits for your customers. We build to your bill-of-materials and package to your requirements or we can create the bill-of-materials for you.

MSP stocks complete kits, as well as, individual parts for the industry’s major cylinder rebuilds. This includes JIC (American) cylinders and Japanese cylinders. We are able to cross reference many seal kit numbers and review your seals to match up the correct seal. Use our knowledge and experience to solve any possible issues that you may have with your current application or to improve the life and functionality of the application.

MSP can review and size your seal kits.

Contact one of our Seal Specialists for assistance in replacement seal kits or building a custom kit for your configuration needs.

How soon can I get my parts?

We stock 25,000-30,000 part numbers or SKUs and they can be available immediately. Customer specific parts’ lead times will vary based on type and material of the seal.