Mechanical Seals For Pumps
We supply industrial Mechanical Seals, Braided Packing, Gasket Material, Gaskets O-rings, lip seals and other seal devices for your pumps, and compressors!
American Seal & Packing
We supply mechanical seals for all your pump and compressor needs!
As an independent specialty manufacture/distributor we offer the name brands you know as well as our own line of high-quality seals. We source primarily domestically, but also offer select European design seals.
There is nothing more expensive than installing an inferior seal. Our objective is to provide quality based seal solutions that result in longer seal life, not cheap seals. There is nothing more expensive than an inexpensive mechanical seal.
Upgrading the materials of construction of a seal will extend its life. Higher quality seal faces that will run longer is a wise investment saving great sums of money in the long run. Employing quality elastomers rather than ones that break down and tear keeps the list of things to do shorter.
On the opposite end of the spectrum, we talk every day to customers that have been overpaying for a name brand seal and getting very little in return.
At American Seal & Packing we bridge that gap. By dealing directly with machine shops, we produce quality seals ourselves at reasonable prices. It gives us control over the imported products washing over our shores.
We do not, however, lose sight of the value of offering proven name brands with highly engineered seals. The Brands we offer include AST, Burgmann, Delta, Flow Serve, Latty, Sepco, Utex, Vulcan, and others. With these brands and others. This inclusion of name brands allows us to offer proven API, nuclear, dry running, chemical, and other critical application mechanical seals.
1E Repairable Single Spring rubber bellows seals
2D Single Spring Seal Rubber Bellows seals for short stuffing boxes
21C Stamped Stainless Steel Single Spring Rubber Bellows mechanical Seals
Multispring ASP Type 8 pump seal
In-line Balanced Multiple Spring Seals
Multiple Spring Seals with PTFE Wedge
Multi-spring Cartridge Seals
Single Spring Cartridge Seals
Metal Bellows Cartridge Seals for high temperatures
Silicon Carbide / Tungsten Carbide L-Shape, O-ring Mount and CUp mount seats
As mechanical seals have evolved,
they have become more reliable, more capable of handling ever wider application ranges, and more complicated. Understanding the basics of “how a mechanical seal functions” will help you understand the value of using the best available technology.
Fundamentally, every seal will have a stationary part and a rotating part. While companies like John Crane (who we are not affiliated with) and Durametallic (now Flow Serve) have argued which seal face should be harder. Most seal companies will agree it does not matter and the argument was over the marketing of a “better mousetrap”. The seal faces will run against each other and both are lapped and polished to 2-3 light bands (roughly 6 millionths of an inch). The flatness of the seal faces prevents any leakage other than a vapor. Double seals prevent the vapor from getting out in AQMD/EPA fugitive emission sensitive applications.
3 key areas need to be sealed for a mechanical seal to perform properly. Along the pump shaft, a rubber bellows, o-rings, or PTFE / Flexible Graphite wedges are used to prevent leakage along the shaft. At the entrance to the pump’s stuffing box, an o-ring or gasket is used to prevent leakage from escaping from it. And 3rd the area between the seal faces.
The 1923 first invention of the mechanical seal that would seal a rotating shaft with no visable leakage has come a long way.
The material choices made in a mechanical seal will define the life span of the seal. The material choice is far more important than the choice of the seal brand name. Chemical applications need to have elastomers and seal faces that are compatible. Abrasive applications must have a seal face combination that will hold up and not be worn down prematurely. Pumps that are running fast must have a seal face combination that will not get hot when running at full speed. The selection of materials will determine how long the seal lasts, and what your preventive maintenance cycle needs to be.
Below are the most common seal faces. We can provide others such as glass-filled PTFE, Brass, Bronze, Aluminum Bonze, etc.
Once you know the seal face combination that is best for your application, you will need to decide which elastomer (rubber) is best. The secondary seals (o-rings, rubber bellows, or gaskets) on single springs seals and multi-spring seals are generally, Buna, EPDM, Viton (FKM) or Aflas. Other options not listed include FEP encapsulated o-rings, PTFE o-rings, and PTFE or flexible graphite wedges.
|Buna-N (Nitrile): The most widely used 0-Ring elastomer. Excellent resistance to petroleum products. Excellent compression set, tear, and abrasion resistance. Good resistance to many oils and chemicalsTemperature range: -40° to +250°F.|
General service oil/water
Strong Chemicals, High Heat
|EPDM: is a black plate finish sheet with superior resistance to weathering, ozone and UV exposure. EPDM also provides very good chemical resistance* Good resistance to Anti-freeze, Synthetic Detergents, Acetone, Boric acid, Ethanol, Formaldehyde, Mercury, Potassium Sulfate, Silver Nitrate, Steam (up to 212 Fahrenheit)|
Some Chemicals, Steam, Water
Strong chemicals, petrochemicals, High Temps
High-temperature mechanical seals generally use Grafoil or similar flexible graphite which can provide sealability to 850 F in oxidizing applications or up to 5,400 F if no oxygen is present. Reduced oxygen environments will fall somewhere in between. Steam for example will seal to 1200 F. Generally seals with flexible graphite will be metal bellows seals with an end fitting that permits the graphite to be compressed to create a seal.
We Cut Gaskets
From quality brands like Durlon, Grafoil and FMI come quality parts. Our flash cutting knife edge cnc means we can recommend the right material, draw the gasket, have the computer guide the cutting of another quality part in one day!
We would not be much of a seal company if we did not offer o-rings in a wide range of materials.
Aflas – FKM – FFKM – Viton – Neoprene – Nitrile – EPDM – SBR – FEP Encapsulated – Kalrez and others.
AS&P provides multiple brands and our own line of braided packings for pumps and valves. We offer packings for difficult applications such as API fugitive emissions packings or mixer and agitator packings. Of course all the standards, GFO, PTFE, Carbon, Flexible Graphite, and abrasion-resistant Aramid packings are in stock. We are not affiliated with U.S. Seal MFG.
There is no sealing device more expensive than a cheap one.
We are unique. Most distributors are tied to one major line and promote only that line. We offer multiple lines because no one sealing company is good at, or most cost effective in all the product segments they offer. Let us help you get the most for your money.
Braided Compression Packing is another specialty for AS&P. We can supply specialty packings for fugitive emissions helping to maintain compliance with government agencies, or very simple packing for oils, water, food, pulp and paper, etc. We supply our own AS&P brand as well as popular brands including: Sepco, Utex, Teadit, and Garlock.
The most common question we get is what should i use, Pump Packing or a Mechanical Seal?
Packing is excellent in a wide range of applications. The factors to consider are is leakage acceptable, and what cost target are you trying to stay under in the short term and long term. Mechanical seals are generally more expensive initially. However the longer you keep your pump in service, the more cost effective a mechanical seal can be. Most packings must leak an average of 6 drops per minute (with the exception of flexible graphite), to lubricate the shaft. American Seal & Packing stocks both packing and mechanical seals, and can help you decide what is best in your application.