Truck and car tyres rely on compressed air to support vehicle loads, while tubeless tyre valves provide controlled inflation, pressure adjustment, and air retention. The valve assembly incorporates a core pin, valve seat, sleeve, tapered seal, return spring, and protective cap to maintain an effective seal and prevent air leakage. During inflation, a valve adaptor depresses the core pin, allowing compressed air to enter the tyre; once the adaptor is removed, the spring returns the valve to its closed position.
For passenger cars, tubeless tyres commonly use snap-in valves consisting of a rubber moulding bonded to a metal stem casing. Commercial vehicle applications generally use all-metal clamp-in valves secured to the wheel rim with an extended threaded base and nut. Single, double, or triple-bond configurations can accommodate different rim profiles and wheel combinations.
Valve stems are essential safety components because they retain tyre air and facilitate pressure adjustment. A defective valve stem can result in gradual air loss, tyre deflation, or excessive tyre temperature. The project therefore focuses on the manufacture of tubeless valves for cars and trucks, including valve components, valve caps, cores, machining, moulding, assembly, testing, and quality control.
| Particulars | Details |
|---|---|
| Plant Capacity | TUBELESS VALVES FOR CARS AND TRUCKS |
| Land & Building (1000 sq.mt.) | Nil |
| Plant & Machinery | Rs.1.04 Cr |
| Working Capital for 2 Months | Rs.2.58 Cr |
| Total Capital Investment | Rs.3.77 Cr |
| Rate of Return | 46% |
| Break Even Point | 48% |
Tubeless tyre valves are components that allow compressed air to enter, remain inside, and be released from a tubeless tyre when required. They generally include a valve stem, core assembly, seal, and protective cap. During inflation, an adaptor depresses the valve core to allow compressed air into the tyre. When the adaptor is removed, the return spring closes the valve. Proper valve construction and sealing are important for maintaining tyre pressure and reducing the risk of air leakage during vehicle operation.
Snap-in and clamp-in valves differ mainly in their construction and method of attachment to the wheel rim. Snap-in valves use a flexible rubber moulding bonded to a metal stem casing and are pulled through the valve hole until the rubber base locks into position. Clamp-in valves generally use a metal or alloy stem that is secured to the rim with a threaded connection and nut. The appropriate design depends on the wheel rim, tyre application, pressure requirements, and vehicle configuration.
Valve stems are important because they help retain compressed air and provide a controlled means of inflating and adjusting tyre pressure. A damaged, worn, or poorly sealed valve can allow air to escape gradually, affecting tyre pressure and vehicle operation. Since valve stems are exposed to environmental and mechanical conditions, they should be included in routine tyre inspections. Proper selection, installation, sealing, and testing of the valve assembly are therefore important aspects of tubeless tyre maintenance.
The manufacturing process can use several types of machining, forming, moulding, and testing equipment. The report identifies mini CNC lathes, CNC milling machines, multi-spindle drilling machines, grinding machines, injection moulding machines, and nut making machines among the plant and machinery. Supporting equipment may also include rubber moulding presses, automatic assembly machines, universal testing machines, and hardness testing machines. The exact equipment configuration depends on the valve design, materials, production method, required tolerances, automation level, and quality-control requirements.
Raw materials depend on the specific valve construction and manufacturing process. The report identifies brass scrap, mild steel rod, HDPE granules, and butyl rubber sheet among the materials associated with the project. Metal components can require machining, forging, threading, and finishing, while rubber or polymer components may be formed or moulded to achieve the required sealing characteristics. Material selection should consider dimensional accuracy, mechanical strength, pressure resistance, compatibility with the tyre and rim, durability, and the requirements applicable to the finished valve.
Quality control for tubeless tyre valves should verify dimensional accuracy, material characteristics, sealing performance, pressure resistance, and functional operation. The report includes references to test set-up, test methods, performance requirements, and Bureau of Indian Standards material. Depending on the valve type, inspection may cover threaded connections, sealing surfaces, rubber moulding, valve-core operation, and assembly integrity. Testing equipment such as universal testing machines and hardness testing machines can support product verification, while process inspection helps maintain consistent dimensions and performance throughout production.
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