ASP-Type 1E
Mechanical Seal

This industry-standard mechanical seal was the first popular single spring seal common on industrial water pumps.


Seal Products

John Crane originally developed this style of seal over 50 years ago and it has been an industry-standard ever since. We call our version a 1E but the fundamental design is the same. Through the development of a rubber boot to seal the shaft and having a seal head sit on top of the spring, this seal design seals well and lasts long in a wide range of applications.
There are two ways to produce the seal head, either machined on a CNC or stamp them from sheet metal to form the body. There are advantages to each method. A machined head will be more durable and repairable. Stamped seal heads are often not repairable (especially in small sizes. Stamped versions are the most common inexpensive and effective. Our seals are not made by John Crane or US Seal Manufacturing (we can offer them if you prefer either brand).

ASP-1E Mechanical Seal

asp-1 description

Operating Limits

  • -4F to 210F (-20C to 100C)
  • Pressure Range: 200 psig
  • Speed Range: To 2,500 fpm, To 3,600 fpm
Type1 Ceramic Carbon Buna

The ASP-1E seal head sits on top of the spring

Available in either stamped stainless steel or machined from bar stock, this seal is a workhorse and one of the most common in the world.

Single Spring Cartridge

ASP Type 1E cartridge seal is a durable slurry seal

By adding a gland and a sleeve, this durable seal with it’s difficult to clog design make a great inexpensive slurry seal.

Order your Single Spring Seals

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Type 1E Seals from ASP

  • Stainless Steel construction
  • Durable
  • Repairable
  • Single Spring Design
  • Up to 500 F Service
  • Carbon Faces Standard
  • Non-Pusher Seal
  • Pressures up to 400 PSIG
Single Spring Cartridge

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Type 1E Seals in a Cartridge Design

  • Stainless Steel construction
  • Durable
  • Repairable
  • Single Spring Design
  • Up to 500 F Service
  • Carbon Faces Standard
  • Gland and Sleeve Included
  • Pressures up to 400 PSIG


Stationary Seats

Selecting the style of the seal is only half the battle. Choosing the right seal face materials and the type of seat can make the difference of a seal that lasts for days or decades.

There are many materials seal seats can be made from but these are the most common:


  • Ceramic
  • Ni-resist
  • 17-4 Stainless Steel
  • Silicon Carbide
  • Tungsten Carbide
  • Glass filled PTFE
  • Brass / Bonze
  • Aluminum Bronze

Mechanical Seals

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.

Get In Touch

(888) 654-SEAL

1537 E. McFadden Ave-A
Santa Ana, CA. 92705


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Tue: 7:30am - 5pm
Wed: 7:30am - 5pm
Thur: 7:30am - 5pm
Fri: 7:30am - 5pm
Sat: Closed
Sun: Closed

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