Fisher 1052PSV Instruction Manual page 13

Instruction Manual
D103407X012
WARNING
Be aware of pinching parts during installation, maintenance, and adjustments of valve/actuator components. To avoid
injury, keep hands and tools clear of actuator access windows when operating or adjusting the actuator.
Loading Connection
Follow these steps if the tubing and fittings have been loosened or removed from the accessories.
1. Connect the loading pressure piping to the pressure connection in the top of the diaphragm casing. Run 3/8 inch
tubing between the 1/4 NPT pressure connection and the instrument. Run 1/2 inch tubing between the volume
booster and the upper casing.
2. Keep the length of pipe or tubing as short as possible to avoid transmission lag in the control signal. If an accessory
(such as a volume booster or a valve positioner) is used, be sure that the accessory is properly connected to the
actuator. If a valve positioner is part of the assembly, the pressure connection to the actuator will normally be made
at the factory.
3. When the control valve is completely installed and connected to the instrument, check for correct action
(air‐to‐open) to match the controlling instrument. For successful operation, the actuator stem and valve shaft must
move freely in response to the loading pressure change on the diaphragm.
Figure 10. Indicator Orientation Shown When Valve/Actuator are in the Closed Position
PROPER ORIENTATION OF
TRAVEL INDICATOR (KEY 37),
SHOWN WITH ARROW
POINTING TOWARD COVER
(KEY 33) FLAT.
WARNING
Be aware of pinching parts during installation, maintenance, and adjustments of valve/actuator components. To avoid
injury, keep hands and tools clear of actuator access windows when operating or adjusting the actuator.
GO Switch Mounting
1. Coat two 1/2-13 x 2.00 cap screws (key 34) with nuclear grade anti-seize lubricant and bolt the GO switch mounting
bracket and actuator cover (key 33) to the actuator box (key 14) as shown in figure 9. Torque to 92 NSm (68 lbfSft).
1052PSV Actuator
May 2011
PROPER ORIENTATION OF TRAVEL
INDICATOR SCALE (KEY 35), SHOWN
WITH FLOW ARROW POINTING
AWAY FROM COVER (KEY 33) FLAT.
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