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Introduction to :

Valves Technologies

Valves are mechanical devices that help in the regulation and

control of pressure or fluid by either closing or opening the

flow direction of the fluid or pressure. Valves operate in

different positions. Valves have found their importance in

different industries and applications.

There are many different types of valves that are found in

different industries and applications are as Below:

Solenoid Valves Pneumatic Valves

Hydraulic Valves Valve Actuators

Safety Valves Ball Valves

Control Valves Butterfly Valves

Check Valves Flange Valves

SOLENOID VALVESSolenoid valves have found their primary

use and importance in the control of

elements. Solenoid valves are grouped and

characterized depending on how they

operate.

They’re 5 types of solenoid vales-

1. Direct Acting Valves

2. 2 Way Valves

3. Pilot Operated Valves

4. 3 Way Valves

5. 4 Way Valves

PNEUMATIC VALVESA pneumatic system is a system designed

to apply certain levels of force against

specific objects.

These pneumatic systems depend on the

pneumatic valves to ensure the correct co-

ordination and control of pressure and air.

Types of pneumatic valves are:

1. 2 Way Directional Valves

2. b) 3 Way Directional Valves

3. c) 4 Way Directional Valves

4. d) 5 Way Directional Valves

5. e) Spring Offset Valves

6. f) Dual-Inline

H Y D R A U L I C VA LV E SThis regulation in turn helps in sustaining a

balanced ratio of power dynamics in the

machines. Just like valve actuators,

hydraulic valves have been designed to

perform different functions. Hydraulic valves

are divided and grouped into 3 types

depending on their applications and

functions.

Types of Hydraulic valves

1. Flow Control Hydraulic Valves

2. Pressure Hydraulic Valves

3. Directional Valves

a. Check valves

b. Spool valves

VALVE ACTUATORSA valve actuator is a type of mechanism that

operates by closing or opening a valve. Valve

actuators are of different types with each and

every valve actuator been specified for particular

functions and responsibilities.

Types of valve actuators

1. Manual valve actuators

2. Hydraulic valve actuators

3. Pneumatic valve actuators

4. Electric valve actuator

Valve actuators use in the following areas.

-Oil refineries.

-Mining industries.

-Gas exploration sites.

-Packaging, testing and assembly industries.

SAFETY VALVES

Safety valves are designed to relieve excess

pressure from equipments. Safety valves have

been used to protect equipments such as heat

exchangers and pressure vessels from thermal

expansion and eventually thermal explosion.

Types of Safety Valves

1. Spring Loaded Safety Valves

2. Pilot Operated Safety Valve

3. Dead Weight Safety Valves

BALL VALVESThe spherical disc usually has port or an

opening through the middle. When the port is in

line with both ends of the valve, the flow usually

occurs. The flow also ceases to occur when the

port and the valve ends are not on the same line

(when valve is closed). The ball valve falls under

the quarter turn valves together with the butterfly

valve and the plug valve.

Types of Ball Valves

1. V Port Ball Valve

2. Full Port Ball Valve

3. Kompact Valve

4. In reduced Port

5. Cavity Filler Ball Valve

6. Trunnion Ball valves

7. Floating Ball Valve

CONTROL VALVESControl Valves are used to control the flow of

pressure, liquid level and temperature by either

closing or opening depending on the set time and

conditions.

Parts and composition of a Control Valve

-Valve positioner

-Valve body

-Valve actuator

Types of Control Valves

a) Single-seated Control Valve

b) Double-seated Control Valve

c) Air to Close Control Valve/ Fail Open

d) Fail Open/ Air to Open Control Valve

BUTTERFLY VALVES

The Butterfly is usually a metal disc mounted on

the rod. Butterfly valves and ball valves have the

same working mechanism in that both of them

allow a quick shut off and their closing

mechanism takes the form of a disk.

Types of butterfly valves.

a) Concentric butterfly valves

b) Doubly eccentric butterfly valves

c)Triply eccentric butterfly valves

CHECK VALVESCheck valves are categorized under two-port

valves which mean that they have two openings in

their body. One opening allows fluid to enter while

the other opening allows fluid to leave.

Types of Check valves

1. Ball check valves

2. Diaphragm check valves

3. Swing check valve

4. Stop check valve

5. Lift check valve

Check Valves use in the following areas.

-Irrigation sprinklers.

-Metering pumps.

-Steam boilers.

-Heating systems.

FLANGE VALVES

Flange valve fittings are made up of steel, cast,

copper, aluminum and iron. Flange valves

appear in different types and shapes. Each and

every flange valve has its own specific

functions.

Types of Flange Valves

1. Raised Face (RF)

2. Flat Face (FF)

3. Ring Type Joint (RTJ)

VALVES

Contact details :

VISUM Ltd.Letna 40040 01 KosiceSlovakia - E.U.

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