Deck 12: Process Diagrams

Question 1

What do the following symbols symbolize?

Answer 1

1) gate valve
2) hand operated gate valve
3) globe valve
4) needle valve
5) plug valve
6) ball valve
7) butterfly valve
8) ball valve
9) butterfly valve
10) orifice plate
11) rotameter
12) check valve
13) diaphragm valve
14) pinch valve
15) check valve
16) stop-check valve
17) relief valve
18) 3-way valve
19) angle valve
20) knife valve
21) gauge
22) safety valve
23) bleeder valve
24) 4-way valve
25) hydraulic operated gate valve
26) y-type strainer
27) basket strainer
28) removable spool
29) future line
30) minor line
31) major line
32) pneumatic line
33) hydraulic line
34) capillary tubing
35) mechanical link
36) software or data link
37) jacketed
38) hydraulic operated ball valve
39) ejector/eductor
40) flange
41) flexible spool
42) expansion joint
43) breather
44) static mixer
45) pulsation dampner
46) steam trap
47) pneumatic operated globe valve
48) solenoid valve
49) motor operated gate valve
50) normally closed, hydraulically operated gate valve
51) electromagnetic, sonic, optical, nuclear
52) motor operated gate valve
53) electric line
54) centrifugal pump
55) horizontal mounted centrifugal pump
56) positive displacement pump
57) vertical mounted centrifugal pump
58) progressive cavity pump
59) dome tank
60) screw pump
61) open top tank
62) bin
63) sphere
64) vacuum pump
65) external floating roof
66) piston pump
67) double walled tank
68) gear pump
69) drum
70) internal floating roof tank
71) multi-stage centrifugal compressor
72) centrifugal blower
73) reciprocating compressor
74) liquid ring compressor
75) steam turbine
76) piston compressor
77) steam turbine driven centrifugal compressor
78) mixer
79) motor
80) rotary screw compressor
81) rotary compressor with silencers
82) plate and frame heat exchanger
83) air cooled heat exchanger
84) hair-pin heat exchanger
85) shell and tube heat exchanger
86) kettle reboiler
87) spiral heat exchanger
88) heater
89) condenser
90) u-tube heat exchanger
91) forced draft cooling tower
92) natural draft, hyperbolic cooling tower
93) induced draft cooling tower
94) atmospheric cooling tower
95) boiler
96) potential transforming symbol
97) furnace
98) transformer overcurrent relay (time delay)
99) motor
100) voltmeter switch
101) fuse
102) current transformer
103) ammeter switch
104) circuit breaker
105) switch
106) motor circuit contacts
107) power transformer
108) voltmeter
109) under voltage relay
110) ammeter
111) transformer overcurrent relay (instantaneous)
112) mixing reactor
113) transducer
114) pressure indicating controller
115) pressure recording controller
116) level alarm
117) packed column
118) plate column
119) level indicator
120) level transmitter
121) level recorder
122) level controller
123) flow indicator
124) flow transmitter
125) flow recorder
126) flow controller
127) pressure indicator
128) pressure transmitter
129) pressure recorder
130) pressure controller
131) temperature indicator
132) temperature transmitter
133) temperature recorder
134) temperature controller
135) transducer, converter
136) pressure indicating controller
137) pressure recording controller
138) level alarm
139) flow element
140) temperature element
141) level gauge
142) analyzer transmitter
143) electrical drawing

Question 2

Please draw a flow control loop.

Answer 2

See figure

Question 3

Please draw a pressure control loop.

Answer 3

See figure

Question 4

Please draw a level control loop.

Question 5

Please draw a temperature control loop.

Question 6

Please draw a cascade control loop.

Question 7

Draw a simple PFD. Please include the following equipment; two tanks, centrifugal pump, piping, gate valve, globe valve, pressure indicator, check valve.