20/21C Series
Ball Valve
Installation & Maintenance Manual
2
03/30/21
www.atcontrols.com
IOM7013 REVISION 01
SCOPE
CAUTION
•
For your safety, read this manual before installation or service. All persons involved in the installation/removal and
disassembly/reassembly of the valve should wear the proper personal protective equipment.
•
Before installing or servicing, please ensure the line pressure has been relieved and any hazardous fluids have been drained
or purged from the system.
•
Ensure that all Lockout and Tagout procedures for the system have been properly implemented.
USE
•
Maximum results and long life of valves can be maintained under normal working conditions and according with pressure/
temperature ratings and corrosion data chart.
INSTALLATION
GENERAL INFORMATION FOR INSTALLATION
•
The valve can be installed in any position on the pipeline.
•
Before installation of the valve, the pipe must be flushed clean of dirt, burrs, and welding residue or the seats and ball
surface will be damaged. The pipe must be free from tension and in proper alignment. Check to ensure that all connections
are free from defects.
•
Use conventional sealant, such as hemp core, Teflon, etc. on the threads. Apply wrench only on the hexagon of the valve
ends. Tightening by using the valve body or lever can seriously damage the valve. In some applications, screwed valves are
back welded on site. These valves must be treated as per instructions for weld end valves before back welding.
VALVE OPERATION
•
To OPEN the valve: turn the handle counterclockwise until the handle is parallel with the pipeline and the
handle has
contacted the handle stop.
•
To CLOSE the valve: turn the handle clockwise until the handle is perpendicular with the pipeline and the handle has
contacted the handle stop.
•
A handle lock is incorporated into the handle
DISASSEMBLY OF VALVE
•
Remove valve from pipeline.
•
Place valve in its fully open position. Remove end cap (Item #2) of valve.
•
Close valve. Remove seats (Item #8), Joint Gasket (Item #13), and Ball (Item #3).
•
Remove Stem Nut (Item #5), Lock Washer (Item #6), Handle (Item #7), Gland Nut (Item #9). Remove Stem (Item #4) by
holding the bottom of the stem and pushing the stem through the Body (Item #1).
•
Remove Thrust Washer (Item #11).
•
Examine all parts for damage. If there is damage to any parts, these parts shall be replaced when reassembling valve to
ensure proper operation of valve.
RE-ASSEMBLY OF VALVE
•
Place new thrust washer (Item #11) onto Stem (Item #4) and place Stem into valve.
•
Re-install Gland Nut (Item #9) and tighten to the torques listed in Table A.
