Alfa Laval Tri-Clover 741 Series, Service & Installation Manual, Page: 23 / 34

771 THROTTLING
All orders for repair parts must contain the following data:
1. Complete model number (from name plate).
2. Serial number (from name plate).
3. Key number and description
The following exploded view and accompanying parts list
facilitate order repair parts from the factory. All parts list
illustrated are indexed to the parts list by key numbers.
Series 771 Available Valve Styles
Each Tri-Clover Air-Actuated Valve is identified
by a model number. The model number
consists of five groupings or codeing as shown
below: Sample Valve Part Number:
771L - 10M - 20 - 2 - 316L
Valve Series
771L Long Stroke
771S Short Stroke
Body Style/Port Connection*
10M - Lower tee/Tri-Clamp
®
21M - Lower tee, Upper tee/Tri-Clamp
27M - Upper tee/Tri-Clamp
30M - Lower cross/Tri-Clamp
Actuator Types
10
- Normally open
20 - Normally closed
15 - Diaphragm (normally open)
25 - Diaphragm (normally closed)
80 - Mid-Position (short stroke only)
Port Size (tube OD) 1, 1 1 /
2
", 2", 2 1 /
2
", 3", 4"
Material 316L Stainless Steel
*“M” designated standard Tri-Clamp port
connection. Other port connections are
available upon application, e.g. Tri-Weld®,
designed by “W”. Specifiy the type of port
connection required when ordering replacement
bodies below.
12 (4 req’d)
10 (4 req’d)
16
14
2L or 2S
8
4 and 5
17
1L or 1S
6
3L or 3S
10 (4 req'd)
11 (4 req'd)
12 (4" size)
32
33
13
30
20
21
26
13
DIVERT VALVES SHUT OFF VALVES
31
22 34 27
19 18 18A
1M 1D
4" Only
7
15
17
4 and 5
11 (3 req'd)
10 (3 req'd)
2A
2B
2C
25
PARTS LIST
1
2
3
4 5
1
2
3
4
5
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