Instruction Manual
D104297X012
V270 Valve
September 2018
5
Key number locations are shown in figures 4, 5 and 6, unless otherwise noted. Throughout this manual, the
component key number will be identified for clarity.
1. Install a three‐valve bypass around the control valve assembly if continuous operation will be necessary during
inspection and maintenance of the valve.
2. The valve is normally shipped as part of a control valve assembly, with a factory adjusted actuator mounted on the
valve. If the valve or actuator has been purchased separately, or if the actuator has been removed, refer to the
Actuator Mounting section and the appropriate actuator instruction manual for installation and adjustment
procedures.
3. The standard valve construction allows uni-directional or bi-directional flow. If possible, install the valve in a
horizontal pipeline with the drive shaft vertical, however, the orientation of the valve does not affect the
performance.
CAUTION
Be certain the valve and adjacent pipelines are free of any foreign material that could damage the valve sealing surfaces.
4. Provide appropriate flange gaskets, and place the valve in the pipeline. Tighten flange bolting in a star pattern to
ensure the flange gaskets are compressed evenly.
Note
Standard Fisher V270 live-loaded PTFE packing is composed of partially conductive packing rings (carbon‐filled PTFE male and
female adaptors) to electrically bond the drive shaft to the valve body. For hazardous area service, an alternate shaft‐to‐body
bonding strap is also available by using the following step (see figure 2).
5. For hazardous area applications where redundant shaft-to-body grounding is preferred, attach the optional
bonding strap assembly (key 45) to the valve drive shaft (key 4) with the clamp (key 44) and connect the other end
of the bonding strap assembly to the valve body with the mounting cap screw as shown in figure 2.
Figure 2. Optional Shaft‐to‐Body Bonding Strap Assembly
VALVE BODY
ACTUATOR
A
A
VIEW A-A
A3143-2
