Date post: | 08-Aug-2018 |
Category: |
Documents |
Upload: | shahjahanhashimali |
View: | 217 times |
Download: | 0 times |
of 20
8/22/2019 Valves Types and Usage
1/20
VALVES TYPES ANDUSAGE/PIPE FITTINGS
8/22/2019 Valves Types and Usage
2/20
VALVES
DEFINITION
PURPOSE
SELECTION
FUNCTION
TYPES AND USAGE
8/22/2019 Valves Types and Usage
3/20
DEFINITION
8/22/2019 Valves Types and Usage
4/20
PURPOSE
Fluid movement must be controlled for a
system to perform effectively
Protect equipment from over pressure
8/22/2019 Valves Types and Usage
5/20
SELECTION
FLUID
TEMPERATURE
PRESSURE
FLOWRATE
8/22/2019 Valves Types and Usage
6/20
FUNCTION
STARTING OR STOPPING A FLOW
REGULATING A FLOW
PREVENT BACKFLOW
RELIEVING PRESSURE
8/22/2019 Valves Types and Usage
7/20
TYPESThere are four types of valve relative
to its function.
Block valve : Start or stop
Control valve : Regulation
Check valve : Prevent Backflow
Relief valve : relieve excessive pressure
8/22/2019 Valves Types and Usage
8/20
Kinds of valve
There are seven major kinds of valve
relative to its construction
Gate
Globe
Needle
PlugBall
Butterfly
Diaphragm
8/22/2019 Valves Types and Usage
9/20
Gate Valve
Type : Block Valve
Usage
Straight flow
Free flow is required
Immediate shutoff Minimum pressure drop
8/22/2019 Valves Types and Usage
10/20
Globe ValveType : control valves
Usage
Throttle
Possible shutoff
Liquid service
8/22/2019 Valves Types and Usage
11/20
Needle ValveType : control valve
Specialized form of
globe valve
Application
precise throttling metering a very small
flow
8/22/2019 Valves Types and Usage
12/20
Plug Valve
Type: block valves
control valves
quarter-turn valvesApplication
clean fluids
slurries.
8/22/2019 Valves Types and Usage
13/20
Ball ValveType :Block valve
control valve
special type of plugvalve
Application
original pipe diameter
must be maintained Low temperature
service
8/22/2019 Valves Types and Usage
14/20
Butterfly Valve
Type: block valves in
low-pressure services,
seldom used as controlvalves
Application
quarter-turn valve
low-pressure service.
8/22/2019 Valves Types and Usage
15/20
Diaphragm ValveType control valves
Application
Abrasive or corrosive
materials such as
Slurries
Acids caustic
8/22/2019 Valves Types and Usage
16/20
Automatic valves
Control Valve
Check Valve
Relief Valve
Safety Valve
8/22/2019 Valves Types and Usage
17/20
Control Valve Remotely or locally
controlled
Operation of the control
valve is governed by
sensors that detect level,
pressure, temperature
Actuated electrically,pneumatically,hydraulically,
or manually
8/22/2019 Valves Types and Usage
18/20
Check Valve
Check valves are are
used to prevent a
backflow in a pipingsystem.
Kept open by the flow
of fluid
Close either by gravity
or by reversal of the
fluids forward flow.
8/22/2019 Valves Types and Usage
19/20
Relief Valve relieve excess pressure
in a system before
piping or equipmentgets damaged
relief valve closes
automatically
8/22/2019 Valves Types and Usage
20/20
Safety Valve To relieve excess
pressure
Safety valves aredesigned to pop nearly
wide open