G H. RAISONI COLLEGE OF ENGINEERING

TOPIC: - TYPES OF VALVES

(An Autonomous Institute Under UGC Act 1956 and Affiliated to R.T.M. Nagpur University)

DEPARTMENT OF CIVIL ENGINEERING

SUB:- ENVIRONMENTAL ENGINEERING

SUBMITTED BY:-

1. SAURABH DESHMUKH 29

2. SHASHANK DESHMUKH 32

What are VALVES?

Mechanical devices designed to direct, stop, mix or regulate the flow, pressure

or temperature of a process fluid.

Two basic groups:

Stop valves - used to shut off or partially shut off the flow of fluid( ex: globe, gate, plug, needle, butterfly)

Check Valves - used to permit flow in only one direction (ex: ball-check, swing-check, lift-check)

What are VALVES made of ?

Steel, Iron, Plastic, Brass or any other Special Alloys.

How do we compare VALVES ?

Rangeability:

Ratio of maximum to minimum flow that can be acted upon by the VALVE

after receiving the signal from the controller.

TYPES OF VALVE:-

GATE VALVE

SOCURE VALVE

SAFTY VALVE

NEEDLE VALVE

AIR VALVE

CHECK VALVE

LATITUDE VALVE

BUTTERFLY VALVE

MUD VALVE

GLOBE & ANGLE VALVE

AIR VALVE :-

There are three basic types of air release valves:-

˃ Kinetic Air Release valves

˃ Automatic Air Release valves

˃ Combination Air Release valves

Kinetic Air Release Valves with Large Orifice :-

This type of valve is used to release air at high flow rates during the filling of the line

and to allow air to enter the line at high flow rates during its emptying.

The Kinetic Air Release valve will function when the line is not under pressure. It is

designed so that when the line is under pressure (water flowing) the valve will stay

closed.

Automatic Air Release Valves with Small Orifice :-

This type of valve is used to release air during water flow, while the system is under

pressure. When air bubbles appear in the valve, the ball will drop, causing air to be

released. When the water rises again, the ball will be lifted, causing the valve to close.

Combination Air Release Valve :-

This type of valve incorporates an automatic and kinetic air release valve into one unit.

CHECK VALVE :-

Controls direction of flow

Operated by flow of fluid in pipe

Types:

Swing check - disc moves through an arc

Lift check - disc moves up and down

Ball check - ball is located at end of stem and lifts to allow flow

BUTTERFLY VALVE :-

Butterfly valves is a quarter turn rotatory motion

Valve that uses rotating round disk as a regulating Element.

Used widely in water treatment plant since large pipes are used

Used in water, fuel, and ventilation systems

Size : - 2 in- 8 in

Advantage: - small, light-weight, & quick-acting

Disadvantage :- leaks early & only low-flow throttle

MUD VALVE :-

Mud Valves are designed for use in draining large volumes of fluids by means of

static head pressure.

They are particularly useful in reservoirs, and in tanks of water and wastewater

treatment plants, for normal operations, and when draining is required for

maintenance or cleaning.

GLOBE & ANGLE VALVES :-

Most common, Rising stem control valves

Design simplicity, versatility of applications, easy

maintenance & ability to handle a wide temperature

and pressure range

Most widely used valve in Ammonia plant

Has a cage to regulate flow

Size < 0.5-42 inches >

THANK YOU