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Alfa Laval
Control Unit
741 Series
Alfa Laval 741 Series User Manual
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ESE0338
4-ENUS2
1810
Original
manual
Instruction
Ma
nual
Seri
es
741,
761,
762
&
771
Air-Act
uated
V
alves
2
Table of Contents
Table of Contents
3
Safety
4
Important Information
4
Introduction
5
About this Manual
5
Maintenance
10
Valve Disassembly
10
Valve Component Inspection
12
Valve Assembly
13
TR and TR2 Stem/Seat Assembly
14
Type 10, 20, and 30 Actuator
15
Type 80 Actuator
17
Type 15 and 25 Actuator
18
Spare Parts
22
741/761 Divert Valve
22
741/761 Shut off Valve
24
761 Reverse-Acting Valve
26
761 Y-Body Valve
28
762 Kettle Valve
30
762 Tank Outlet Valve
33
762 Tangential Valve
36
771S Divert Valve
38
771S Reverse-Acting Valve
40
771S Throttling Valve
42
Type 15 25 Valve Actuators
44
Diaphragm Actuators with Siemens Positioner 771S Series 1
46
Diaphragm Actuators with Siemens Positioner 771 1-1/2" to 3" Valves
48
736-X Swap Valve Short Stroke Stems
50
736-X Swap Valve Long Stroke Stems
52
736TR-X Swap Valve Short Stroke Stems
54
736TR-X Swap Valve Long Stroke Stems
56
736TR2-X Swap Valve Short Stroke Stems
58
736TR2-X Swap Valve Long Stroke Stems
60
Spares Dimensions
62
Tank and Kettle Valve Flange, Ferrule, Tank Pods Dimensions and Part Numbers
62
Actuators
65
761/741 TR Shut-Off TR/TR2 Stems
65
700/800 LP Shut-Off Stems
70
700/800 Spherical Shut-Off Stems (Replaced by "LP" Stems)
71
700/800 Spherical Stems (Replaced by "LP" Stems)
72
700 RA "LP" Stems
74
700/800 LP Divert Stems
76
761/741 Spherical Divert LS (Long Stroke) Stems
79
Bonded TR & TR2 Kettle/Tank Outlet/Tangential Valve Stems
80
4
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Alfa Laval 741 Series Specifications
General
Type
Control Unit
Series
741
Manufacturer
Alfa Laval
Power Supply
24 V DC
Protection Class
IP65
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