Instruction Manual
D102013X012
8560 Valve
June 2017
22
3. Unscrew the machine screws (key 17), and remove the seal retainer (key 2). Also remove the retainer clip (key 30).
4. Remove the seal ring or seal ring assembly(key 4). The spring (key 5) is removed with a PTFE seal ring.
5. For 316 stainless steel seal ring assemblies, replace the gaskets (key 4C) if the entire seal ring assembly is not
replaced. Scrape off the old gaskets from both sides of the seal ring and the seal ring sides of the valve body (key 1)
and seal retainer. Clean the gasket surfaces.
6. Reconnect or mount the actuator (if it was removed) before proceeding.
For an actuator with adjustable travel, also adjust the actuator before proceeding. This is necessary due to the
measurements that must be made during the actuator adjustment process.
Refer to the Actuator Mounting section of this manual and to the separate actuator instruction manual for mounting
and adjusting instructions.
7. The valve should be closed during seal ring installation to permit accurate centering of the seal. To install the new
seal ring:
For a PTFE seal, if the spring (key 5) was disassembled, hook the spring ends together. Work the spring into the recess
in the seal ring (key 4). Install the seal ring and spring assembly into the recess in the valve body as shown in figure 15.
For a complete 316 stainless steel seal ring assembly, install the seal ring assembly as shown in figure 15.
CAUTION
New seal ring gaskets (key 4C) are very fragile and must be handled very carefully to avoid gasket kinking, cracking, or
breakage that can cause leakage between the seal ring, seal retainer, and valve body. To avoid gasket damage, make sure
that the valve body is lying flat so that the gaskets do not shift before the following steps are completed.
8.
For a 316 stainless steel seal ring
on which the gaskets will be replaced, lay the following parts down in order so that
they are accurately centered on the valve body: one new gasket; the seal ring oriented as shown in figure 15; and
the second new gasket.
9. Attach the seal retainer and, if used, the retainer clips and washers to the valve body and secure with the machine
screws. Tighten the machine screws evenly so as not to crack or break the 316 stainless steel seal ring gaskets, if
used.
Be certain the disc is closed before installing the valve according to the Installation section of this instruction manual.
Disc, Drive Shaft, and Bearing Maintenance for NPS 3 through 12
This procedure is to be performed when replacing the valve disc, drive shaft, taper pins, hollow pins, and bearings due
to wear or damage to one or more component parts.
Key numbers are shown in figure 14 unless otherwise noted.
Disassembly
1. Loosen the packing flange nuts (key 101). This allows the drive shaft (key 8) to turn without the friction caused by
the packing.
2. Remove the actuator using the steps provided in the Removing the Actuator procedures above, and remove the
seal ring using the steps provided in the seal ring maintenance procedures above.
3. Place the valve on a flat working surface with the seal ring slot facing down.
4. Use blocks to raise the valve body high enough to allow the disc to be rotated to the fully open position (see figure
10).