Instruction Manual
D102013X012
8560 Valve
June 2017
9
D Select and install two pipe line gaskets.
D Flange Cap Screws: If line flange cap screws are used, be certain the cap screw threads engage the tapped holes to a
depth equal to the flange cap screw diameter.
4. Install the remaining line flange bolting to secure the valve in the pipeline. Tighten the nuts to the line flange studs,
or cap screws, in a crisscross pattern to ensure proper alignment of valve, gaskets, and flanges.
Packing Adjustment and Shaft Bonding
WARNING
Personal injury could result from packing leakage. Valve packing was tightened before shipment; however the packing
might require some readjustment to meet specific service conditions. Check with your process or safety engineer for any
additional measures that must be taken to protect against process media.
CAUTION
Use caution when tightening packing follower nuts because over‐tightening the nuts will accelerate wear and could
produce higher rotating friction loads on the valve stem.
1. For PTFE or graphite packing: tighten standard packing follower nuts only enough to prevent shaft leakage.
Excessive tightening of packing will accelerate wear and could produce higher rotating friction loads on the valve
stem. If necessary, refer to the Packing Maintenance section.
2. ENVIRO‐SEAL Packing System will not require this initial re‐adjustment. Refer to the separate ENVIRO‐SEAL Packing
System for Rotary Valves instruction manual (D101643X012) for repair and replacement procedures.
3. For hazardous atmosphere or oxygen service valves, read the following Warning, and provide the bonding strap
assembly mentioned below if the valve is used in an explosive atmosphere.
WARNING
The valve drive shaft is not necessarily grounded to the pipeline when installed. Personal injury or property damage could
result from an explosion caused by a discharge of static electricity from the valve components if the process fluid or the
atmosphere around the valve is flammable. To avoid personal injury or property damage, make sure the valve is grounded
to the pipeline before placing the valve assembly into service.
Standard PTFE packing is composed of a partially conductive carbon‐filled PTFE female adaptor with PTFE V‐ring packing.
Standard graphite packing is composed of all conductive graphite ribbon packing rings. Alternate shaft‐to‐valve body
bonding is available for hazardous service areas where the standard packing is not sufficient to bond the shaft to the valve
(see the following step).
For oxygen service applications it is necessary to provide alternate shaft‐to‐valve body bonding according to the following
step.
4. Attach the bonding strap assembly (key 131, figure 5) to the shaft with the clamp (key 130, figure 5), and connect
the other end of the bonding strap assembly to the valve with the cap screw (key 22, figure 5).
5. For more information, refer to the Packing Maintenance subsection below.
Maintenance
Valve parts are subject to normal wear and must be inspected and replaced as necessary. The frequency of inspection
and replacement depends upon the severity of service conditions. Instructions are given in this section for replacing
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