Instruction Manual
D104223X012
A11 Valve
August 2017
6
2. Remove the protective end covers from the valve and inspect the valve body to be certain that it is free of foreign
material. Also, be certain that adjacent pipelines are free of any foreign material, such as pipe scale or welding slag
that could damage the valve seating surfaces.
WARNING
The A11 valve is designed for use with the appropriate piping schedule for the ASME class. However, before putting the
valve into operation, measure carefully to ensure disk rotation without interference from piping or flanges. Be certain to
center the valve accurately to prevent interference of the disk with the flanges.
The edges of a rotating disk have a shearing effect that may result in personal injury. To help prevent such injuries, stay
clear of the disk edges when rotating the disk.
Damage to the disk will occur if any pipe flanges or piping connected to the valve interfere with the disk rotation path.
Compare the disk chordal swing diameter from the dimensional tables in Bulletin 51.6:A11 CL900-2500 A11 High
Performance Butterfly Valve (D104222X012) to the ID of the pipe to be certain the disk rotates without interference before
putting the valve into operation. Consult with your Emerson sales office or Local Business Partner for any constructions not
listed in the bulletin.
3. Select the appropriate gaskets for the application. flexible graphite, spiral wound, or other gasket types, made to
ASME B16.5 group or user's standard, can be used on A11 valves depending on the service conditions of the
application. Note: spiral wound gaskets, when properly centered, will cover more than 60 percent of the gasket
area at the retaining ring screws.
For metal‐seated and cryogenic valve gasket recommendations, please contact your Emerson sales office.
4. Refer to the appropriate table for the quantity and size of flange bolts required (table 3) and proceed with the
following instructions.
Valve Orientation
A11 valve bodies are designed for installation with the shaft in any orientation around the pipeline: horizontal, vertical,
or at an angle. However, when installing an A11 valve, please follow these recommendations.
Table 3. Cap Screw Data for Lugged Valves
CL900/600
Valve Size, NPS 4
Number of Cap Screws 16
Size‐Diameter Inch - Thread 1‐1/8 - 8
B‐Length of Cap Screw, Inch 3.38
CL900
Valve Size, NPS 6 8 10 12 14 16 18 20 24
Number of Cap Screws 24 24 32 40 40 40 40 40 40
Size‐Diameter Inch - Thread 1‐1/8- 8 1‐3/8 - 8 1‐3/8 - 8 1‐3/8 - 8 1‐1/2 - 8 1‐5/8 - 8 1‐7/8 - 8 2 - 8 2‐1/2 - 8
B‐Length of Cap Screw, Inch 3.63 4.25 4.63 5 5.32 5.75 6.38 6.75 8.5
CL1500/600
Valve Size, NPS 4
Number of Cap Screws 16
Size‐Diameter Inch - Thread 1‐1/4 - 8
B‐Length of Cap Screw, Inch 3.88
CL1500/900
Valve Size, NPS 4 8
Number of Cap Screws 24 24
Size‐Diameter Inch - Thread 1‐3/8 - 8 1‐5/8 - 8
B‐Length of Cap Screw, Inch 5.13 6
