V Seals

V Seals : V Ring seals are basically axial shaft seals.

V Seal Types :

A. All rubber V rings called V Rings. B. Metal cased V ring seal.

Parts of the V-seal

The V-seal is comprised of three basic parts. The body of the seal holds it into place on the shaft or mounting surface. The cone shaped flexible lip rides in light contact with the counter surface and does the sealing. The resilient hinge joins the other two parts together and provides the force which keeps the lip against the counter surface. It is these three parts, working together, which allows simple one piece seal to do what no other seal system can do. 

 Installation

The V-seal can be completely assembled without the need of tools. Being all rubber, it can stretch up to 250% of its molded I.D., so it can be easily stretched over flanges, collars, and entire bearing housings during assembly. This same resilience holds the seal in place without the need for springs or clamps. To assemble the seal, it is stretched onto the shaft by hand and then pushed up against the counterface to a pre-determined width.

Seal Function

One V-seal functions as three different seals. The simple V-seal lip keeps dirt and water out, grease in and acts as a slinger. The V-seal can be used alone to seal lubrication in and/or contamination out, or it can supplement an oil seal, mechanical seal or labyrinth, keeping contamination away from the primary seal. 

Speed

 In most applications, the V-seal rotates with the shaft to provide a slinging action. As such, it is subject to centrifugal force. At speeds below 1600 surface feet per minute (FPM), the stretch tension of the V-seal is sufficient to hold it onto the shaft.

*Above 1600 FPM, axial back up is required in the form of a step in the shaft or a snap-ring or lock collar.

Above 2400 FPM, radial back up is required in the form of a mounting pocket or clamp around the V-seal body. Above 3000 FPM, the lip of the V-seal lifts away from the counterface resulting in a clearance seal and eliminating drag and wear. The V-seal can also be mounted stationary and run against a rotating counterface. In this case, centrifugal force has no effect on the V-seal.

* The V-seal should always have axial back up in oil applications 

Seal Dimensions

The basic dimensions of the V-seals are as follows: (i.e for a V-25 A)

• d - The molded inside diameter of the V-seal = .087”
• d1 - The shaft range the V-seal is made to fit = .095-1.07
• d2 - The maximum I.D. of the counterface = d1 + 0.08
• d3 - The minimum O.D. of the counterface = d1 + 0.45
• A - I.D. width of the V-seal = .018
• B - O.D. width of the V-seal = 0.30
• C - V-seal cross section = 0.1
• B1 – V-seal fitted width = 0.24+/-0.03

Materials

The V-seal is available in a variety of different rubber materials for various operating conditions. Nitrile, Neoprene, HNBR, EPDM and Silicone V-seals can all be supplied. Our proprietary anti-friction treatment (AFT) reduces the already low friction of the V-seal even further.

Food grade materials are available including FDA and NSF approved rubbers. In addition, our compounding lab can develop specialty materials for particular applications. For additional information, see our materials section or contact our technical department.