The V-RING is a unique all-rubber seal for rotary shafts.It has been used successfully by OEMs and on the replacement market world wide in a broad range of applications. V-Seals are simple, versatile, elastomeric "face-type" seals produced in nitrile or FKM.The function of a V-seal is to exclude dirt, water or other aggressive media from entering bearing housings while also retaining grease. The V-seal stretches over the shaft and assumes a tight interference fit. The V-seal rotates with the shaft causing the lip to rotate against the housing or bearing. As the speed increases, friction decreases due to centripetal force. Morgan V-seals Includes VA style, VAX style, VL style, VE style, VS style, RM style, RME style.
Product Profiles
VA type
Type A V-rings with bevel back serves as a pressure less, axial rod seal with a very short mounting length, which is clamped on a shaft. The flexible sealing lip seals a counterface at a right angle to the shaft preventing dirt, dust and splash to enter the construction. Available in the widest range of sizes from .110″ (2.7mm) shaft to 79.530″ (2020mm) nitrile and fluoroelastomer. Ideal for protecting gearboxes, electric motors and drives.
VS type
Type S V-rings with bevel back serves as a pressure-less, axial rod seal which is clamped on a shaft. The flexible sealing lip seals a counterface at a right angle to the shaft, preventing dirt, dust and splash to enter the construction. Available in sizes from .180″ (4.5mm) shaft to 8.270″ (210mm). Commonly used in agricultural and automotive applications.
VL/LX type
Type L/LX V-rings with straight back serves as a pressure-less axial rod seal with a very small mounting length, which is clamped on the shaft. The flexible sealing lip seals a counterface at a right angle to the shaft preventing dirt, dust and splash to enter the construction.Profiles VL/VLX have narrow axial cross sections making them suitable for compact arrangements and are often used in combination with labyrinth seals. Available for shaft diameters from 105 mm(VLX from 135mm) to 2025 mm.
VE type
The VE profile is a facial effect V-Ring with a large radial section and is used for large dimensions. Due to its extra-long sealing lip, the VE-style seal is used in applications where the housing is abnormally far away from the shaft. VE seals larger than VE 2000 are available on inquiry.
VAX/RM/RME type
Profiles RME, RM and AX are heavy duty V-Rings that are designed primarily for large high-speed bearing arrangements, I. E. rolling mill and papermaking machine applications. Additionally, they can be used as secondary seals for heavy duty applications where the primary seal has to be protected against water and or particulate contamination. The RME, RM and AX types can be axially and radially located on the shaft with the especially designed clamping bands. Available for shaft diameters from 200 mm to 2025mm(for larger than 2025mm, please inquiry us).
Design Attributes
• Easy to Install
• Permits a broader range of shaft sizes
• Allows them to be used on eccentric and misaligned shafts
• Material: Nitrile (NBR), (FKM ), HNBR, EPDM or Custom
Application
Electric motors
Power transmissions
Bearing protections
Mobile machinery
General industry Axles
Loss of Power
The sealing lip of a V'Ring exerts such a low pressure on the contact surface area that the loss of power resulting from it is also low. The variations in power loss depend on the circumferential speed as well as the diameter of the axis in rotation, as shown in the graph below. At speeds greater than 11.0 m/s, the sealing lip has a tendency to detach itself, as the centrifugal force is greater.
Shaft design
The V-Ring is in most cases fitted on a rotating shaft. The requirements regarding diameter tolerances and surface roughness of the shaft are fairly moderate. As the V-Ring is an all-rubber seal it can be stretched to a varying degree and be used for a wide range of shaft diameters.
In applications where low power loss and long lifetime are important it is recommended that the V-Ring size is selected, so that the shaft diameter falls between the minimum and nominal values within the recommended range. This is because the contact pressure of the sealing lip increases with the shaft diameter, due to the stretch of the V-Ring. At a higher stretch, a harder contact pressure is generated, causing an accelerated wear of the sealing lip. In order to prevent the V-Ring from sliding along the shaft, and to ensure the correct installation width, it is always recommended to arrange an axial support, especially for small cross-section profiles and larger shaft sizes, for example V-Ring type A, L and LX.
The surface roughness of the shaft should in general not exceed Ra 6.3 μm. For sealing fluids and fine particles, a maximum of Ra 3.2 μm is recommended. Sharp edges and burrs, which can damage the V-Ring must be avoided.
Installation guidelines
When the V-Ring is used as a grease seal/contaminant excluder, the V-Ring is normally mounted on the outside of a bearing housing, with or without, axial support.
General rules:
1. The V-Ring, the counter-face and the shaft should be clean.
2. The shaft should preferably be dry and free from grease or oil, particularly when the V-Ring is mounted without axial support.
3. The lip of the V-Ring should be lubricated with a thin film of grease or silicone oil.
4. In cases when friction must be reduced to a minimum, coat the counter-face with a low friction agent, and do not apply grease to the lip.
5. Ensure that the V-Ring is mounted with a uniform stretch around the shaft.
When the V-Ring is mounted on the shaft the outer diameter of the lip is reduced. Unless the stretch is uniform this reduction will vary around the periphery. This may lead to partial entry of the lip in the bore of the counter-face when the seal is pushed into position.
In the case of large diameter seals a uniform stretch can be achieved by inserting a blunt screwdriver or a piece of string under the V-Ring body and running it around the shaft twice. Take care not to damage seal or shaft.
The most convenient method of assembling large diameter V-Ring's, to ensure uniform stretch, is to mark off the body of the V-Ring and the shaft or seating with six equidistant marks. The marks should then be matched together when the V-Ring is fitted in position.
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