Triad 66FD Series Installation & Maintenance Manual

TRIAD
INSTALLATION & MAINTENANCE MANUAL
SERIES 66FD
3-PIECE FULL OR REDUCED PORT BALL VALVES
1. USE:
1.1 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. MANUAL OPERATION:
2.1 The opening and closing of the valve is done by turning the lever a ¼" turn (90 degrees).
A. Valve in Open Position – the lever is in line with the valve or pipeline.
B. Valve in Closed Position – the lever is at right angle with the valve or pipeline.
3. DISASSEMBLY & CLEANING PROCEDURE:
Caution: ball valve can trap fluids in the ball cavity when closed.
3.1 If the valve has been used to control hazardous media, it must be decontaminated before disassembly.
It is recommended that the following steps are taken for safe removal and reassembly.
A. Relief the line pressure.
B. Place valve in half-open position and flush the line to remove any hazardous material
from the valve.
C. All persons involved in the removal and disassembly of the valve should wear the proper
Protective clothing, such as face shield, gloves, etc.
Maintenance of parts is easy, even if the valve is installed in the line:
By removing all the body bolts except one and loosening the remain one, valve body can be swung out.
Seats, gaskets and ball can be replaced without disturbing pipe alignment.
On threaded lines, valve can be screwed on without the use of unions, as the three-piece
construction makes valve ends free, by removing the bolts.
4. GENERAL INFORMATION FOR INSTALLATION:
4.1 The valve can be installed in any position on the pipeline.
4.2
Before installation of the valves, the pipe must be flushed clean of dirt, burrs and welding residues, or the seats
and ball surface will be damaged.
4.3 The pipe must be free from tension.
5. INSTALLATION OF THREADED VALVES
5.1 Use conventional sealant, such as hemp core, Teflon, etc. on the threads.
5.2 Apply wrench only on the hexagon of the valve ends. Tightening by using the valve body or lever can
seriously damage the valve.
5.3 In some applications, screwed valves are backwelded on site, These valves must be treated as per
instructions for weld end valves before backwelding.
6. INSTALLATION OF WELD-END VALVES
6.1 Tack weld the valve on the pipe in four points on both end caps.
6.2 With the valve in the open position, (lever to be parallel to the axis of the pipe), remove all the body bolts
Triad Series 66FD
Fire Rated Valve
Manual 66.doc
02/19/2004