This prsentation is on valves and its design and its working is explained in detail for the better understanding of the valves almost all of the valves types are shown.

1. FLUID FLOW
SUBMITTED TO: DR. SHEEMA
SUBMITTED BY: Syed wasi
haider

2. VALVES
SIMPLY KNOWN FOR STOPPING
AND STOPPING FLOW OF FLUIDS.

3. VALVES
FUNCTION
❏ Starting and stopping flow
❏ Regulating flow volume known as
throttling
❏ Preventing reverse flow of fluids
❏ Changing direction
❏ Limiting the fluid pressure

4. VALVES
TYPE &
FUNCTION
VALVES

5. 5
Valves
● On-Off Service
● Throttling (Regulating) Service
● Prevention of backflow
● Pressure control (Control
Valve)

6. ON – OFF SERVICE

7. 7
Gate valve.

8. Gate Valve :-
● ON – Off Valve ,Used in:
● 1-Water.
● 2- Oil.
● 3- Gas
● 4- Steam
● And Other Fluid Services.
8

9. 9
Wedge gate
valve and
parallel slide
valve

10. 10
Gate valve 2.

11. 11
Plug valve
(on-off) or
Cock low-
pressure

12. 12
Plug valve
(on-off) or
Cock

13. 13
Plug valve
Applications
● Gas and liquid fuel
● Water.
● Extreme temperature flow
● Boiler feed water.
● Low Pressure Steam .
● Corrosive Liquids and Gases

14. 14
Ball Valve (on-
off)

15. 15

16. Ball Valve
Quarter-Turn
● Hydraulic systems .
● Water .
● Air.
● Oil .
● Petrochemical .
● High volume, high
pressure and high
temperature flow .
16

17. THROTTLING
(Regulating) SERVICE

18. 18
Globe Valve
(High
pressure &
value )

19. Globe
Valve.
19

20. 20
Globe Valve
Ops.

21. 21
Needle Valve
● Fine accurate flow Cont.

22. 22
Butterfly Valve
● Flow Control
● Low Speed
● Both Side flow

23. 23
Butterfly Valve
2

24. Prevention of
backflow

25. 25
split disc
check

26. 26
Split disc
check valve
operation

27. 27
lift check valve
(Recommended
for
Vapor service)

28. Swing check valve
(liquids)
installed horizontal
& vertical
28

29. 29
Swing check
valve Ops.

30. 30
Piston check
valves

31. 31
check valves

32. Ball check valve (for heavy fluids)
installed horizontal ,vertical & angle
32

33. 33
Check valve
(Ball)

34. Pressure Relief valves

35. 35
safety valves
and relief
valves
● Safety valves are primarily
used with compressible gases
and in particular for steam and
air services .
● Relief valves are commonly
used in liquid systems

36. Pressure Relief
Valves
● Releases excess
pressure to protect
system.
● Use with Gases &
Vapors & liquid.
● Open Full at once at set
pressure.
● Outlet port larger than
inlet port.
● Never adjust whilst in 36

37. 37
Type of
Pressure
Relief Valve
● Safety valve :Used with compressible
gases .steam and air services .
● Relief valve : Used in liquid systems. as
pressure overspill devices .
● Safety relief valve : used either for
liquid or compressible fluid.

38. 38
Pressure
Relieve valve
(safety valve) for clean
air
● Releases excess pressure
(clean air)

39. Safety valve - liquid applications,
opens in proportion to the
39

40. 40
Typical
examples of
safety valves
used on steam
& Air systems

41. 41

42. 42
pneumatic
pressure
reducing

43. ● Control system would normally
consist of the following
components:
● Control valves.
● Actuators.
● Controllers.
● Sensors.
43

44. Globe Valve.
44

45. 45

46. 46
Valve
positions

47. OTHER TYPES
OF VALVES
1. Ceramic disc valve used mainly in heavy duty
cyclic applications for abrasive fluids ceramic disc
can also provide class 4 leakage
2. Clapper valve used in appliances like siamese fire
application to allow only one hose to connected
instead of two blocks the other side from leaking
out
3. Needle valve to accurate flow control
4. Poppet valve used in piston engine to regulate fuel
mixture intake and exhaust.

48. 5. Spool valve for hydraulic control
6. Aspin valve it is a cone shaped metal part fitted to
the cylinder head of an engine
7. Blast valve prevents rapid overpressuring in a
fallout shelter or a bunker.
8. Heimlich valve a specific one way valve used on the
end of chest drain tubes to treat a pneumothorax
9. Four way valve used to control the flow of a steam
to the cylinder of early double acting steam engines

49. 10. Heart valve regulates blood flow through
The heart in many organisms
11. Larner johnson valve needle control valve
Often in large sizes used in water supply systems
12. Leaf valve one way valve consisting of diagonal
obstruction with an opening covered by hinge flap
13. Schrader valve used to hold air inside automobile
tires
14. Tesla valve a form of check valve with no moving
parts invented by nikola tesla for use with fluids

50. 15. Swirl valve a specially designed joule
thompson pressure reduction/ expansion
valve imparting a centrifugal force upon
the discharge stream for improving gas
liquid phase separation
16. Saddle valve where allowed is used to
tap a pipe for a low flow need
17. Solenoid valve an electrically controlled
hydraulic or pneumatic valve
18. Pilot valve regulates flow or pressure to
other valves

51. 19. Presta valves are used to
hold air in bicycle tires
20. Reed valve consists of two
or more flexible materials
pressed together along much
of their length but wit influx are
open to allow one way flow
much like a heart valve

52. Thank you