Principle Of Operation; Installation - Emerson Fisher 1052 Instruction Manual

1052 Size 20 Actuator (F & G)
February 2019
Table 1. Specifications
Operating Principle
Direct Acting: Increasing loading pressure forces the
diaphragm rod from the top to the bottom of the
casing
Casing Pressure Ranges
J 0 to 1.2 bar (0 to 18 psig), J 0 to 2.3 bar
(0 to 33 psig), or J 0 to 2.8 bar (0 to 40 psig)
depending on spring used
Maximum Allowable Sizing Pressure
3.5 bar (50 psig)
Maximum Allowable Casing Pressure
4.1 bar (60 psig)
Maximum Rotation
90 degrees (travel is adjustable between
60 degrees and 90 degrees by travel stops)
Acceptable Valve Shaft Diameters, Inches
J 9.5 mm (3/8 inch) or J 12.7 mm (1/2 inch)
1. Use this value to determine the maximum torque output. The pressure‐temperature limits in this manual and any applicable code or standard should not be exceeded.

Principle of Operation

Key numbers refer to figure 5. The diaphragm rod (key 10) moves down as loading pressure is increased on top of the
diaphragm (key 3). As the loading pressure is decreased, the spring (key 11) forces the diaphragm rod upward.
The spring and diaphragm are selected to meet the requirements of the application and, in service, the actuator
should produce full travel of the valve with the diaphragm pressure as indicated on the nameplate.
Consult the positioner instruction manual for actuator principle of operation with positioner.

Installation

WARNING
Always wear protective gloves, clothing, and eyewear when performing any installation operations to avoid personal
injury.
Personal injury or equipment damage caused by sudden release of pressure may result if the valve assembly is installed
where service conditions could exceed the limits given in table 1 or on the appropriate nameplates. To avoid such injury or
damage, provide a relief valve for over‐pressure protection as required by government or accepted industry codes and
good engineering practices.
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Stroking Time
Depends on rotation, spring rate, initial spring
compression, and supply pressure. If stroking time is
critical, consult your Emerson Automation Solutions
sales office
Material Temperature Capabilities
–40 to 82°C (–40 to +180°F)
Pressure Connections
1/4 NPT internal
Mounting Configurations
See figures 2 and 3
Approximate Weight
13.6 kg (30 lb)
Top‐Mounted Handwheel Specifications
Operating Principle: Can be used for manual
operation of the actuator or as an adjustable "up''
travel stop
Diameter: 121 mm (6.75 inch)
Instruction Manual
D100322X012
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