Raimondi Ball Valves - type HPA - 150# to 1500#
Installation & Maintenance Instructions
Emerson reserves the right to change the contents without notice
RAILT-0038-EN-1308
Ball valves for all applications with an anti blow-out
stem, a fire safe design and an automatic relief body
cavity.
Table of Contents
1. General
1
2. Subject
1
3. Storage
1
4. Operation/utilization
1
5. Overhaul/procedures
2
5.1 External leaks (location and repair)
2
5.2 Internal “in line” leaks
3
5.3 Restoring the line tightness
3
6. Seats replacement
5
7. Upper stem replacement
5
8. Lower stem replacement
5
Appendix A:
Tightening torque for bolts
6
Tightening torque for bolts with
PTFE coating
6
Appendix B:
Drawing and part list
7
1. General
For the safety and reliability of ball valve delivered by Raimondi, we recommend you to follow the
directions for use described in this manual.
Proper maintenance is a guarantee for a correct operation of the equipment.
2. Subject
This manual deals only with the maintenance of Raimondi valves.
The electrical, pneumatic or hydraulic actuators are described in their own maintenance manuals
supplied by their manufacturers.
3. Storage
Each valve is protected in our workshop by means of:
• Plastic plugs on both ends (temporary)
• Peel-off varnish on the clamps (temporary)
• An external painting
• The lubrication of the passage port (temporary)
The temporary protections have to be removed before installing the valve on the pipe.
4. Operation/utilization
4.1. The valves must be installed in open position (as delivered)
Warning
Do not operate the valves before the line is cleaned. Do not keep the valves in middle position.
The seats would be damaged and tightness would be altered. The normal positions are: open
position or closed position.
4.2. The closing or opening of the valve is obtained by a 90° rotation of the ball/stem assembly. The
valve is closed clockwise. The position of the ball (“open” or “closed” position) is indicated as
follow:
For bare stem valves:
For gear operated valves:
With a position indicator fitted at the top of gear
Open position
Open position
Pipe axis
Closed position
Closed position
Pipe axis
Pipe axis
Open position
Closed position
RAIMONDI
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