KLS® Lip Seal Sizes

What is a KLS rotary lip seal?
KLS seals are composite spring-loaded rotary lip seals with an HNBR body and an extrusion resistant plastic heel. They have remarkable high-pressure performance, compared to other spring-loaded lip seals. This performance is due to the hydrodynamic interfacial lubrication of the extrusion-resistant plastic portion of the seal. This interfacial lubrication is provided during rotation by a patented hydrodynamic wave geometry on the low-pressure end of the seal. Like all Kalsi-brand rotary shaft seals, the KLS seal requires a lubricant reservoir to accommodate the hydrodynamic pumping related seal leakage. Unlike most Kalsi-brand seals, the lubricant for the KLS seal can be supplied from a simple gravity fed reservoir. The KLS seal was designed as a rotating control device (RCD) seal. It has been tested with 1,000 psi differential pressure at 545 ft/minute and 1,500 psi at 136 ft/minute. It can be used in most pressure-retaining applications that require high performance rotary lip seals.

Purchasing KLS seals
Purchase orders and quote requests for this unique high pressure lip seal should be sent to the attention of Seal Sales via e-mail, or by fax at 281-240-0255. Additional KLS sizes can be furnished, subject to a one-time tooling charge to help to defray associated engineering, machining and set-up expenses.

Contact us today to learn more about our KLS lip seal sizes.

Shaft Diameter Seal Part Number Gland Depth R
Gland Width
Gland Width Tolerance (inches)
3.375″ 85.73 mm 668-4 0.250″ 0.404″ ±0.004
4.500″ 114.30 mm 668-32 0.250″ 0.404″ ±0.004
8.768″ 222.71 mm 668-52 0.375″ 0.599″ ±0.005
9.750″ 247.65 mm 668-18 0.375″ 0.599″ ±0.005
10.375″ 263.53 mm 668-56 0.375″ 0.599″ ±0.005
10.500″ 266.70 mm 668-39 0.375″ 0.599″ ±0.005
11.250″ 285.75 mm 668-33 0.375″ 0.599″ ±0.005
13.000″ 331.80 mm 668-27 0.375″ 0.599″ ±0.005
15.500″ 393.70 mm 668-16 0.375″ 0.599″ ±0.005

Updated September 28, 2023

KLS-brand rotary lip seals are offered for sale under the terms and conditions of the “Offer of Sale” that is included in the current revision of the Kalsi Seals Handbook.

The Kalsi Seal Engineering Team

Our engineers are ready to answer your questions about our KLS high performance rotary lip seals. Call them today at 281-240-6500.