88 SERIES
Full Port Ball Valve
Installation & Maintenance Manual
2
August 5, 2019
www.a-tcontrols.com
IOM07001 REVISION 01
1.
SCOPE
1.1.
CAUTION
1.1.1.
For your safety, read this manual before installation or service.
1.1.2.
Before installing or servicing, please ensure the line pressure has been relieved and any hazardous fluids have been drained or
purged from the system.
1.1.3.
Ensure that all Lockout and Tagout procedures for the system have been properly implemented.
1.2.
USE
1.2.1.
Maximum results and long life of the valves can be maintained under normal working conditions and according with
pressure/temperature rating and corrosion data chart.
2.
INSTALLATION
2.1.
GENERAL INFORMATION FOR INSTALLATION
2.1.1.
The valve can be installed in any position on the pipeline.
2.1.2.
Before installation of the valves, the pipe must be flushed clean of dirt, burrs, and welding residues, or the seats and ball surface
can be damaged. The pipe must be free from tension and in proper alignment. Check to ensure that all connections are free
from defects.
2.2.
INSTALLATION OF THREADED VALVES
2.2.1.
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.
2.3.
INSTALLATION OF WELD-END VALVES
2.3.1.
Tack weld the valve on the pipe in four points on both end caps.
2.3.2.
With the valve in the open position, (lever to be parallel to the axis of the pipe), remove all the body bolts except one. Loosen
the nut on the remaining bolt. Swing the body outside the pipe. Finish welding both end caps on the pipe.
2.3.3.
When cooled down, clean both end caps and body surface.
2.3.4.
Swing the body back in position and replace the bolts. Tighten all nuts slightly. This operation is very important to keep the
body and end caps perfectly parallel, thus preventing distortion of the end caps. Tighten body bolts evenly (see section 5.5).
Make sure that maximum tightening torque is observed. Check proper operation of the valve.