Types And Specification Of Engine Valve Machine2020-07-21

One of the components of an engine is the valve. Engine valves are mechanical components that support internal combustion.

 

It allows or restricts the flow rate of fluid or gas in the combustion cylinders during engine operation.

 

Engine valves function in such a way to create an interface with other engine components such as rocker arms.

 

Functionally, it opens and closes in the appropriate order as well as with proper timing. One can also refer to the engine valve as a check that allows air injection.

 

However, one might not be wrong to say that the engine valve is the 'heart' of an engine. Due to its peculiar role in linking other components to function as an entity.

 

Due to the complexity and the vital role of engine valves, it is pertinent for one to source for a professional engine valve machine manufacturer that has some proven outstanding performance.

 

Below are the types and specifications of engine valves readily available in the market.

 

Types of Engine Valves

Engine valves are classified based on their function, although there are several specific types of engine valves based on design and materials.

 

The primary types of engine valves include:

1. Monometallic engine valves

This type of engine valves is made by a single material that forms both the stem and head of the valve.

 

It's peculiar in the sense that it provides both high heat resistance and exhibits good anti-friction ability.

 

2. Bimetallic engine valves

As the name implies, it is fabricated from two different materials together using a friction welding process.

 

This creates a valve that has austenitic steel on the valve head and martensitic steel for the valve stem.

 

The properties of these valves include,

 

The austenitic steel on the valve head provides high-temperature and corrosion resistance.

 

The martensitic steel for the valve stem offers high tensile strength and abrasive wear resistance.

 

3. Hollow Engine Valves (HEV)

Engine valve machine suppliers refer to HEV as a special bimetallic valve that contains a hollow cavity that is filled with sodium.

 

The sodium liquefies as the valve temperature rises and is circulated by the motion of the valve. This helps in dissipating heat from the hotter valve head.

 

Is more efficient than other types of the engine valve. Because of the hollow cavity facilities greater heat transfer through the stem than with solid valve.

 

It is worthy to note that the martensitic stem material is a better conductor of heat than austenitic head material.

 

Apart from the heat transfer capacity of the hollow valves, they are appropriate for use in modern engines.  

 

Functionally, hollow valves are used in delivering more power out of smaller and denser engine designs.

 

Although there are many other types of engine valve designs according to professional engine valve machine manufacturers. This includes the sleeve valves.

 

4. Sleeve valve

The alleged sleeve valves comprise a tube or sleeve that sits between the chamber wall and the piston.

 

Sleeve valve can slide off a camshaft as well as with other engine valves. The sleeve valve rotates driven causes ports that are cut into the sleeve to align with corresponding ports in the chamber wall.

 

Thus functioning as a simple engine intake and exhaust valve without the complexities of rocker arms and lifters.

 

Engine Valve Specifications

Typical engine valves are identified by the parameters outlined below. It is important to note that this data is only for information purposes.

 

Therefore be aware that the parameter differs from manufacturer to manufacturer.

 

These parameters equip buyers better to take part in a discussion of their specific needs with engine valve machine suppliers.

 

1. Stem diameter

You must know the diameter of the engine valve stem your machine or vehicle uses

 

2. Stem length

It is important to know the distance from the stem tip to the valve head.

 

3. Seat angle

The angle cut of the valve head’s seat, measured in angular degrees, typical values being in the range of 20o – 60o.

 

4. Valve materials

It describes the material or materials used for valve fabrication.

 

5. Coatings

It identifies any coatings or surface treatments applied to the base material of the valve, such as chrome plating, nitride, PVD, or ceramics.

 

Conclusion

Engine valves are one of the components in internal combustion engines that are highly stressed.

 

The need for reliable engine valves capable of exhibiting resistance to repeat can be achieved by having the right information, and identifying a proven and customers oriented engine valve machine factory.