Call us 7 days a week

1.888.978.7759
Click to Chat

Know exactly what you want?

Save time with this quick order form. If you know the catalog/part numbers for the items you wish to purchase, enter them into your cart here. You can also browse the site and add items to your cart from any product page.

Quick Order

Item NumberQuantity
Return to Category List

APG Buna N 70 Duro Buna An Style U Cup - NU6226-7 - Min Qty 50

Item #: WBB379371

Sold By: globalindustrial.com

Usually ships in 3 to 6 days Estimated lead times do not include weekends or holidays. Transit time is determined by shipping method and destination. Orders requiring credit information might take additional time.

0 reviews | Write a review

Minimum Quantity: 50 ($30.00)

Price: $0.60

Frequently Purchased Together

Product Information
Product Q&A
Accessories
U-Cups derive their name from their shape and are self-sealing on both the inside diameter and outside diameter. They are most often used for sealing rams or rods and are very popular due to the small gland space required. They are especially adapted to low speed, low pressure environments for both pnuematic and hydraulic cylinders. They provide an extremely smooth, steady movement because of their inherent low friction.

The seal is obtained by means of the flared, flexible lips coming in contact with the rod or cylinder wall. Clearance is provided at the heel for minimum friction. Through this design, the packing is preloaded when installed. Sealing effectiveness is increased by internal pressure of the air or fluid against the inner surface of the lips. For continued sealing effectiveness and long seal life, the surface finish of the working surface of either rods or bores should be a maximum of 16 microinches. It is not recommended that U-cups or any other single lip seal be used in any application where there is excessive side loading.

The 6226 Series U-Cup has a flat sealing lip and is available in 70 Durometer Nitrile.

The lips of the U-Cup should always be toward the pressure force. The U-Cup is a floating seal which means the height of the U-Cup should be between .015" to .090" shorter than the depth of the gland. (See the Packing Space Chart below). The added gland space allows the pressure to equalize on both lips, thus keeping the U-Cup from rolling. The surface finish for a static seal surface should be 32 RMS maximum. The dynamic surface should be in the range of 8 to 16 RMS. Finishes rougher than 16 RMS could cause premature lip wear and finishes finer than 8 RMS can result in failure of the seal due to loss of lubrication.

Product Specifications

  • DIAMETER INCHES7/8
  • HEIGHT INCHES3/16
  • WIDTH INCHES1/2
  • LENGTH INCHES7/8
  • COLOR FINISHBLACK
  • DEPTH INCHES3/16
Required fields are highlighted.

Give Us Your Feedback On This Page

* Help us continuously improve by reporting any errors or omissions on this page including:

  •  Incorrect or confusing information
  •  Misspellings or bad grammar
  •  Page not loading correctly or generating an error
  •  I did not find what I was looking for
  •  Other

Please provide an example of any missing or incorrect information...

* Your comments will help us improve our services to all customers.:

* Email Address:

* Verification: (Type the characters you see below)

captcha captcha_refresh

If you need immediate assistance, please call 1.888.978.7759

By submitting this form, you agree that your submissions and their contents will automatically become the property of Global Industrial Equipment without any compensation to you.