About Cylinder Head Gasket

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We have made it our goal to manufacture high quality gaskets, deliver our products on time, and provide exceptional customer service. We are dedicated to customers in all Automobile, Marine, Earthmoving & Other industrial sectors needing standard & custom gaskets of superior workmanship. With die cutting, slitting, water jet cutting, VMC Cutting and some times manual cutting capabilities, Dev precision Engineers works with a variety of metals & other Composite materials to meet all of customers needs. We have high production rates as well as Smaller Quantiy, a short production cycle and reduction in product finishing time.

A head gasket sits between the engine block and cylinder heads and is a vital part of internal combustion engines. The gasket must perfectly fit the contours of the cylinders, the engine block and the cylinder head to ensure the engine’s efficiency and safety. Head gaskets are essential components because they prevent fuel, heat, and exhaust from escaping the combustion chamber and threatening other engine components. They also prevent inefficiencies in the combustion process, but most engineers and consumers think of efficiency as secondary to safety in an explosive reaction. If head gaskets fail, heat from the reaction can degrade other engine parts. Coolant and oil can enter the combustion chamber and mix with fuel. If these or other problems persist after a gasket fails, it can cause catastrophic engine failure. As the most critical sealing application in any engine, head gaskets are imperative to insure your motor runs correctly.

About Inlet Exhaust Valve

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Various type of heat treatments its definition and objective

It is defined as an operation or combination of different operations involving heating and cooling of metal or an alloy in solid state for the purpose of obtaining certain required structures and desirable properties of a combination of properties suitable for the particular application.

Heat treatment is carried out to achieve one or more of the following objects:

To relieve the stresses set up in the material after hot or cold working in order to improve machine ability.
To improve mechanical properties like tensile strength, hardness, ductility, shock resistance etc.
To modify the structure of the material to improve its electrical and magnetic properties.
To increase the qualities of a metal to provide better resistance to heat, corrosion and wear.

Following heat treatment processes are mainly in use for achieving most of the objects of heat treatment:

Annealing
Spheroidising
Normalising
Hardening
Tempering
Case hardening or surface hardening
- Carburising
- Nitriding
- Cyaniding
- Induction hardening
- Flame hardening

About Valve Guides Seat

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We are one of the eminent valve guide manufacturers and suppliers in India, who manufacture and supply a wide range of valve guide. The valve guide offered by us is manufactured from optimum quality raw material, so as to ensure the quality & durability of the final product. We provide comprehensive range of quality engine valve guide, which can be used in different engines. We manufacture and supply a wide range of valve guides widely used for automobiles, tractors, industrial & diesel engines. We manufacture valve guide in various material depend on :-

Customer requirement
Type & Size of engine
Engine R.P.M. & effort of engine
Their application where usedMaterial of Valve Guide as we use :-
- Copper zinc alloy
- Phosphorous Bronze and leaded bronze
- Manganese Bronze
- Aluminium Bronze (North American UNS C95400, German CuAI10Fe, British AB1) for high temperature applications.
- Gun Metal
- Alloy Graded Cast Iron of 25 & 30 Grade. This Cast Iron is specially made for High Racing Engine.
- Tin Bronze (North American UNS C90500, German CuSn10Zn, British G1) for piston airplane enginesCast Iron is a general term applied to a wide range of iron carbon alloys. Their carbon content is such as to cause some liquid of eutectic composition to solidify. The maximum carbon content is therefore about 2% while the practical maximum is about 4.3%Cast Iron should not be thought of as metal having single element. It should at least posses’ six elements. These are iron, carbon, silicon, manganese, phosphorus and sulphur.Some of the important mechanical properties
  - Brinell Hardness Number (b.h.n) = 150 to 225
  - It is a brittle material.
  - It cannot be beaten in sheets or rolled or forged. Hence it is not a malleable material
  Various types of Cast Iron are as follows:
  - Grey Cast Iron
  - White Cast Iron
  - Mottled Cast Iron
  - Malleable Cast Iron
  - Spheroidal Grey Iron (s.g.iron)
  - Inoculated Cast Iron
  - Alloy Cast Iron
  Addition of nickel to cast iron produces fine grains, helps formation of graphite and prevents formation of white hard iron nickel & copper ensure an austenitic structure. Chromium and silicon add resistance to scaling. The microstructure of iron is stabilized and formation of fine graphite is promoted by the addition of chromium. The matrix of cast iron is strengthened through promotion of the fine pearlite by the addition of molybdenum.
  
  Valves developed from CuZnAl-alloy & grey cast iron alloy with high phosphorous content to offer high wear resistance as well as improver the years working properties in poor lubrication conditions. The inner bore of these valve guides is finished to perfect size, not usually done by competitors.
  
  CuZnAl-alloy Guides are with excellent wear resistance and low coefficient of friction. Used for highest stressed guides. While developing these valve guides, we pay care full attention to the accurate dimensions, so that they could meet with the OEM standards.
  
  Our valve guide has hardness in range of 160 225 BHN. ValveGuide has microstructure of matrix pearlite with 5% free ferrite. We also provide thread or spiral in inner diameter of valve guide to retain oil for long time between valve and valve guide & increase life both. Our valve guide are grounded to a surface finish 0.80 micro ra value on its outer dia & maintain outer diameter within tolerance of 12 microns. Our valve guide has Super Finish Bore.