Felt Seal

Felt seal is a material that is used to seal, join or pack and fill the gap between two things or objects together to prevent leakage. It is placed between two surfaces of objects. It creates a sealing barrier between any moving and stationary surfaces in rotary or linear applications, stopping leakages, closing and filling up the space gaps, and locking them tight securely.

felt seal

Felt seal material

Hardness: Depending upon the compression pressure required to maintain between two joining objects Felt seal material is manufactured in different densities or hardness. Manufactured in different types of stiffness having a minimum density of 0.16 grams per cubic cm which is classified as extra soft material. Softness signifies it will quickly absorb any oil and also quickly release oil and other lubricants. Its retention capacity is very low. For general purpose applications, a medium or firm hard quality of felt seal material having a density of 0.34 to 0.36 grams per cm cube with good flexibility and bendable with little elasticity is required, with semi-rigid hardness it is not too compact and easily flexible to any shape required and easy handling. We also manufacture high density, a compact and rigid quality which is extra hard and has a density of 0.45 to 0.60 grams per cm3. In many applications where sealing felt is subject to wear and tear a stiff hard material is used. Durability and life of a compact and rigid quality are always higher compared to the general medium.

Thickness: We manufacture sealing felt in a wide range of thickness, starting from thin 1 mm to high 50 mm. In general inventory, we stock 3 mm Thick (1/8” Inch), 6 mm Thick commonly known as Quarter Inch 1/4”, 8 mm (5/16” Inches), 10 mm (3/8” Inch), 12 mm Thick commonly known as Half Inch 1/2”, 15 mm (5/8” Inch), 20 mm (3/4” Inch), and 25 mm Thick (1” One Inch).

Color: The natural color is off-white, a cream shade which is standard color is always available in ready stock with instant and quick delivery. Whiteness can be further enhanced by bleaching it to pure white. Other color like black felt seal and grey felt seal is manufactured and used. It can be dyed to any color any shade as per buyer requirement.

Fiber:
Felt seal material can be made from different fibers like wool, cotton and polyester. Cotton seal is made from long staple cotton fiber, synthetic fibers like polyester, nylon is also used in manufacturing as per requirement. Different synthetic fibers like polyester, poly-wool viscose are also used in the manufacturing process. Synthetic fibers do not have natural self-felting properties so they are mechanically felted with help of needles that are non-woven, they are waterproof and best suited for door felt seal. It can also be weaved and woven they also require relatively little shaft pressure to function effectively.

Wool felt seal

Wool felt seal is manufactured from wool fiber, wool is a natural fiber having natural felting properties, and it is an ideal environment-friendly material with many uses. Fine sheep wool hair fibers are pressed and compressed heavily to form into a pressed wool pad. These wool seal are made in precision thickness with accuracy. Wool fiber has high temperature resistance and it does not melts or cracks unlike any synthetic fibers.

Felt Seal Shapes & sizes

As a felt seal manufacturer and supplier we can produce in a wide variety of shapes, designs, and many different sizes. Shapes like a square where both the sides have the same and equal side measurements, Trapezoidal and with correct dimension shape will fit easily. Rectangular shape with perfect accurate right angles with fit as spacers into the gaps like a pad which is used to close down all the air gaps. Padding to reduce noise and stop fluid leakage. The strip can be used in temperatures ranging from -40 to +100° degrees. Tape and strips are cut from sheets and rolled into a coil shape. Tapered Cut strips for triangular space gaping, cut with angle accuracy in degree like 30°, 45°, 60°, and 90° as per specification or requirement. Made in round and circular shapes like the Felt seal ring which is a round circular ring shape like washer having Outer Diameter and Inner Diameter and is used in industrial application. In Sphere, cylinder, and oval shape like sealing plug is used in pipes and hole fits and adjusts tightly also used to clean all the dirt and dust from the clog and jammed pipes. Rope sealing for concave and convex designed application. Manufactured in cord and rope shape in different diameters and lengths for wicking and oil transfer. Cutting is done with full accuracy with dice under heavy pressure.

Features and Advantage

Where application demands high qualities of compression, elasticity, resistance to aging and wear, high absorption, and low abrasion, only felt seal are specified. It has high splitting resistance, it is durable and resilient. If the operating temperatures are normal and conditions are good they are highly economical, normally requiring replacement only when the machine is overhauled. It maintains a continuous sealing pressure and seals the surface without any damage.
Commercial quality has good bearing protection characteristics for bearing housing and provides storage for oil and lubricant even if they dry out it starts polishing and protects the shaft from any damage. To enhance the performance, it can be impregnated with wax or grease and petroleum oil to increases the resistance to water and dirt. Lip seals and squeeze packing always fit tightly they do not require any pressure or compression but wool felt seal require relatively a little shaft pressure to fit tightly and function properly. We manufacture felt seal with precision, with accurate thickness and correct precise size with accuracy and under minimum tolerance and variation.

We are felt seal manufacturer and supplier as per International standard specifications like American Standards - SAE F-1, F-2, F-3, F-5, F-7, F-10, F-11, F-12, F-13, F-15, F-50, F-51. High-Quality Wool with accuracy in dimension and precision makes our product unique and exclusive. Germany Standard in accordance to DIN 5419 and DIN 61200 and 61206.

All Engineers in their drawing refer to Industrial Standard grade quality which is the technical grade and is best suited for all machine and engineering sealing applications. Machine felt seal can bear against the mating surface under pressure, they are solid heavy duty felt seal which has longer life compared to normal and regular.

Self-adhesive coating with peel-off sticker type feature can be done on one or both sides.

Compared to other rubber products our felt seal will work even at very low temperatures. Unlike squeeze packings, plastic, and rubber which becomes brittle and turns to powder its life is very good.

Uses & Application :

Felt seal packing is a compressed woolen packing that also provides packing function. It keeps the exact sealing pressure that is required for cushioning purposes thereby also serving the important cushioning function.

Wool Felt has long been used for sealing applications because of various favorable properties such as wicking and oil absorption properties and resilience. It can retain or separate fluids, keep out contaminants, and maintains pressure. Even for filtration purposes, it is very effective, it can filter small particles, and for filtering very small particles it can be dipped into lubricants. Compressed Wool pad material is used sometimes where there is no rubbing contact also providing the essential wicking and lubrication function.

Used as Axle felt seal in tractors and transmission felt seal in Automobile it can do many other functions like filtration, insulation, packing.

Other application are dryer felt seal in washing machine and dust felt seal for different machineries.

Crusher felt seal:

In mining industries where ore is mined and grinded and blended, an ore crusher machine is required. A crusher machine also called a grinding mill crushes the ore and crushing ore requires a heavy-duty tough machine. Similarly, a high-quality bearing is used on them. Those bearing are very expensive and to work in such dusty harsh environment dust protection is required. Grinding can be done in various types of mill. Different types of mill like Ball mill where it is used for trunnion bearing sealing, Rod mill, Autogenous mill, SAG mill, pebble mill, high pressure grinding rolls, tower mill, Jaw crusher, jaw breaker, Roll crusher, roll grinder, Stamp mill, hammer mill, roller mill. (Crusher of Lokotrack, Nordberg, Barmac, Metso, Trellex, Skega) where bearing uses ball mill felt seal for protection.

wool felt is used in crusher machine as Lokotrack crusher felt seal, Nordberg crusher felt seal, Barmac crusher felt seal, Metso crusher felt seal, Trellex crusher felt seal, Skega crusher felt seal, Morganshammer mill seal

Other Uses :

Gunite Machine and Shotcrete machine as bearing seals as dust prevention and oiling of bearing. In Street lighting and Luminaries a packing/ liner is required for tight fitting of lamp glass case with the fitting for use in all weather. In the coal plant, where coal is baked and in all types of raw mineral baking industrial ovens like battery plants, it is used as door seals. In Kilns and furnace sealing, felt is used with a supporting ring and Girth Gear Guard Segment with fixing ring assembly. In pumps and valves as mechanical felt seals for hot vapour sealing. In locomotives, motor truck, for the partition between engine & traction motor electrical generator, during assembly in gear case pinions opening.

Rotary Airlock Valve (RAV) Seal :

In pneumatic conveyance system Rotary Airlock Valve provides easy and free flow transfer of dry bulk solids like powders, granules, pellets, nuggets, dust, cuttings, and crystals from a bin, silo, hopper or cyclone through its conveying system to an adjacent machine in their manufacturing process. In order to maintain an airtight or dust-tight environment, Rotary airlock valves uses Wool felt seal between different pressure zones in material handling and processing systems.

Our felt seal offer the following advantage :
• Available in all types of hardness from soft, sponge type, easily compressible with full flexibility and ability to conform to irregularities on the rotor and housing surfaces.
• Cost effective and economical seal as compared to other products available in the market.
• Unlike Natural rubber or synthetic rubber which either melts or gets brittle over time, our felt seal is made from Wool fiber which neither gets brittle or melts.
• It is known for its durability and resistance to abrasion, weathering, and other chemicals.
• It is suitable for Oil absorption and dust prevention.
• It has long and extended life as compared to any other products. They are very effective seal and are suitable for general-purpose applications.

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Felt oil seal

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dust felt seal

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door felt seal