Types of Valve Explained: A Complete Industrial Guide

Suppose, however, you are working with machines or pipelines or even more systems of water; you are in contact day by day with valves—whether you know it or not. A valve can be small but it is involved in the flow of something very crucial: liquid and gases.

Think about it this way. When you switch on a tap at home, you regulate the flow of water. That tap is a type of valve. Can you just think of the same thing in big industries such as oil refineries, power plants or factories? This system is expanded significantly and the valves are improved.

Here you will know all about the types of valves, their functioning, places of application, and selection of the appropriate valve. We will make it simple, practical, and easy to comprehend.

What is a Valve?

A valve is a mechanical device that regulates, directs or prevents the flow of a liquid, gas or slurry by opening, closing or partially blocking different runways.

Main Parts of a Valve

• Body: It is the main pressure boundary, and it holds the internal components; it joins to the piping.
• Bonnet: The material that is used to cover the body, which in most cases includes the stuffing box and packing to avoid any leaks along the stem.
• Trim: This is a collective term to describe the inner part of the elements (stem, disc, and seat) touching the fluid.
• Disc (or Plug/Ball): This is the “gatekeeper” that closes or opens to prevent or permit flow.
• Asiento: It is the area on which the disc touches to form a leak-proof seal.
• Actuator: It is the device (handwheel, motor, or piston) that exerts the force to cause the movement of the stem.

How Do Valves Work?

Valves operate by altering the location of a component inside a pipe (such as a disc, ball, or gate) to either restrict or control the flow of fluid or gas.

You can just imagine opening or closing a door. As the door opens, individuals may go through. At the time of its closing, movement ceases. The same things happen with the fluids through a valve.

Here is a simple explanation:

• Upon opening of the valve, fluid flows freely along the pipe.
• Upon closing of the valve, the flow ceases altogether.
• Using partially open flow decreases and becomes regulated.

This is a basic movement where the industries regulate pressure, direction and velocity of flow.

Two Main Functions

A: ON/Off Control

• The valve is kept open or closed completely.
• It is not in between flow control.
• Otherwise suitable in situations where you just have to turn on or off flow.

Example: Gate valve.

B: Throttling (Flow Control)

• The valve regulates the flow slowly.
• Flow can be added or reduced where necessary.
• Applicable in case of exact control.

Example: Globe valve.

Types of Operation

A: Manual Valves

• They are operated by hand on a handle or a wheel.
• Simple and cost-effective.
• Common in small systems.

B: Automatic Valves

• Both automated and unattended.
• Use electricity, air pressure or fluid pressure.
• Ideal when large and automated industrial systems are required.

Types of Valve Based on Function

Not all valves do the same job. A system has a purpose in which each type works.

Isolation Valves

• Switched to either turn on or off flow.
• Do not regulate in a slow way.
• Close when closed tightly shut-off.

Example: Gate valve.

Control Valves

• Control flow rate, pressure or temperature.
• Assist in the system balance.
• In automated systems it is very important.

Example: Globe valve.

Check Valves

• Only one-way flow is enabled.
• Block reverse flow automatically.
• Protect pumps and equipment.

Safety Valves

• When the pressure is too high, release some of it.
• Determine explosions or damage to systems.
• Safety means working automatically.

Types of Valves Explained

Now we are going to discuss the most significant types of valves applied to actual industries. Each is designed differently and aimed at a different purpose.

Válvula de compuerta

A gate valve is one where the gate is shaped as a flat or wedge, which is pushed up and down in the valve body.

Cómo funciona

The full life of the gate leaves a straight, fluid way to flow with ease. As it decreases, it obstructs the way. 

Usos comunes

• Sistemas de suministro de agua.
• Oleoductos y gasoductos.

Ventajas 

• Very low resistance to flow.
• Best suited to complete open or completely closed cases.
• Simple and strong design.

Desventajas

• Inappropriate in managing flow.
• Takes time to open or close.

Válvula de globo

A globe valve has a disc with a motion and a seat that is stationary, which limits the flow.

Cómo funciona

The disc rises and falls with the seat to allow you to regulate the quantity of flow accurately.

Usos comunes

• Cooling systems.
• Fuel and steam systems.

Ventajas 

• Very useful in controlling the flow.
• Strong sealing ability.
• Reliable performance.

Desventajas

• Causes higher pressure drop.
• Takes greater effort to work.

Válvula de bola

A ball valve is fitted with a hollow ball with a hole (port) at its center.

Cómo funciona

When the hole coincides with the pipe, the flow of fluid is simple. Rotating the ball causes the hole to move out of the way and obstruct the stream.

Usos comunes

• Gas pipelines.
• Chemical processing plants.

Ventajas 

• Extremely rapid part motion (quarter turn).
• Tight and leakproof sealing.
• Long service life.

Desventajas

• Not suitable in the control of accurate flow.

Butterfly Valve

A butterfly valve is a valve that is a rotating disc on a shaft.

Cómo funciona

The rotor is rotating within the pipe. Fluid flows when it becomes perpendicular to flow. At the position of perpendicularity, flow ceases.

Usos comunes

• Water distribution systems.
• HVAC systems.

Ventajas 

• Lightweight and compact.
• Requires less space.
• Economical with pipes of large sizes.

Desventajas

• Sealing is not as close as ball valves.

Controlador de el volumen

A check valve is automatic and it can only permit outflow in a single direction.

Cómo funciona

When fluid moves forward, the valve will open and when it attempts to go back, then the valve will close.

Usos comunes

• Sistemas de bombeo.
• Water pipelines.

Ventajas 

• Prevents backflow.
• Coats pumps and pipelines.
• No manual control required.

Desventajas

• May result in minor impairment of pressure.
• May cause noise within certain systems.

Válvula de tapón

In a plug valve, a hole is used with a cylindrical or tapered plug.

Cómo funciona

The plug will spin within the valve body either to allow or to prevent flow.

Usos comunes

• Chemical industries.
• Oil systems.

Ventajas 

• Simple construction.
• Quick open and close.
• Easy to operate.

Desventajas

• Wants to be oiled to move with ease.

Needle Valve

A needle valve is also made to control the flow with utmost accuracy.

Cómo funciona

The fine flow is adjusted by a sharp needle thrust slowly into the seat.

Usos comunes

• Laboratory equipment.
• Instrumentation systems.

Ventajas 

• Very accurate control.
• Ideal for small flow rates.
• Smooth operation.

Desventajas

• Unsuitable with large flow systems.
• Slower to operate.

Pressure Relief Valve

Pressure relief valve prevents excessive pressure against systems.

Cómo funciona

It remains closed when it is in the normal operation. Once the pressure reaches a specific pressure threshold, it automatically opens to relieve pressure.

Usos comunes

• Boilers.
• Pressure vessels.

Ventajas 

• Prevents system failure.
• Improves safety.
• Works automatically.

Desventajas

• Needs to be checked and tested frequently.

Diaphragm Valve

Diaphragm valve employs a rubber or plastic membrane, which is flexible.

Cómo funciona

The diaphragm squashes onto the seat to prevent flow and elevates up to permit flow.

Usos comunes

• Food processing.
• Chemical industries.

Ventajas 

• Leakproof design
• Active when dealing with corrosive liquids.
• Easy to clean.

Desventajas

• Constrained due to high temperature.

Pinch Valve

Pinch valve is a soft and flexible tube with the help of which flow is managed.

Cómo funciona

The valve constricts the tube in order to prevent flow and relaxes to permit flow.

Usos comunes

• Mining operations.
• Treatment plants of wastewater.

Ventajas 

• Good in dealing with slurry and solids.
• No contact with metal parts.
• Easy maintenance.

Desventajas

• Incompatible with high-pressure systems.

Types of Valve Based on Operation

Types of Valve Based on Material

Types of Valve Based on Industry Applications

Advantages and Disadvantages of Different Valve Types

Ventajas

• Valves can assist in better controlling the system by enabling you to start, stop or control the flow of the fluids when necessary.
• They make the process safer by avoiding overpressure, backflow or leakage that could cause equipment damage or cause hazards.
• Valves are efficient as they ensure there is proper flow and pressure in the systems, making the systems operate well and saving energy waste.

Desventajas

• The condition of valves needs to be obtained frequently since parts that are in motion may wear off over time; thus, performance is compromised.
• Valves can be expensive, and they differ a lot in terms of the type, material, and size, hence affecting your budget.
• Use of an incorrect valve in your system may bring about severe issues such as leakage, decrease in pressure, or system breakdown.

Como escoger the Right Valve 

The engineers apply the STAMPEED technique when sourcing industrial projects.

• Size: The pipe diameter.
• Temperatura: The fluid and the ambient medium.
• Solicitud: Is it on/off, throttling, or safety?
• Media: Is the fluid corrosive, abrasive (slurry) or clean?
• Presión: The peak operating and surge pressures.
• Ends: Type of connection (flanged, threaded, and welded).
• Entrega: Certifications of compliance (e.g., API 6D,ASME or ISO).

Conclusión

You have just learned the types of valves, their working, and usage. The valves are all different in their functions to maintain flow, safety, and efficiency in the system. Choosing the correct valve can save your gear, minimize failure time, and keep the processes of any manufacturing system running.

We HDC Manufacture are a reliable manufacturer of custom-casting valve bodies that are manufactured to provide quality valves that are built to last, be efficient in performance and durable.

It does not matter whether you need an investment casting valve body, a forged shut-off valve or an accurate valve block; we offer you a quality solution to what you need. Call us now and have our experts choose the ideal valve for your system and also make sure that it is safe, efficient, and durable.

FAQs: Types of Valves

What are the most common types of valve used in industries?

The most used ones are gate valves, ball valves, globe and butterfly valves and check valves. They are used to different purposes.

Which valve is best for high-pressure systems?

Ball valves and gate valves are ideal in high-pressure systems since they provide good sealing and longevity.

What is the difference between a gate valve and a globe valve?

A gate valve is used to control flow by opening a gate and it is suitable when the flow is on and off. A globe valve regulates flow and is more accurate to use.

How do I choose the right valve for my application?

Before choosing a valve, flow type, pressure, temperature, material compatibility, and purpose are factors that must be considered.

What is the lifespan of an industrial valve?

The life will rely on us, content, and care. Industrial valves have a lifespan of between 5 to 20 years when taken care of.