Emerson Fisher 480 Series Instruction Manual
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Emerson Fisher 480 Series Instruction Manual

Yokeless piston actuators
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Instruction Manual
D100291X012
Fisherr 480 Series Yokeless Piston Actuators
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Introduction

Scope of Manual

This instruction manual provides installation, maintenance, and parts information for Fisher 480 Series yokeless piston
actuators.
Do not install, operate, or maintain 480 Series actuators without being fully trained and qualified in valve, actuator,
and accessory installation, operation, and maintenance. To avoid personal injury or property damage, it is important
to carefully read, understand, and follow all the contents of this manual, including all safety cautions and warnings. If
you have any questions about these instructions, contact your Emerson Process Management sales office before
proceeding.

Description

480 Series actuators (figure 1) are yokeless piston actuators that are used in either throttling or on-off applications
with ball valves, butterfly valves, louvers, dampers, and rheostats. They require pneumatic pressure loading from
double-acting positioners (Fisher 3570) or from on-off loading and unloading devices.

Specifications

Table 1 lists specifications for the 480 Series actuator and table 3 lists specifications for the 3570 actuator.
www.Fisher.com
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Figure 1. Fisher 480-15 Piston Actuator
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W1867
480 Series Actuators
August 2012

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Summary of Contents for Emerson Fisher 480 Series

  • Page 1: Table Of Contents

    W1867 Introduction Scope of Manual This instruction manual provides installation, maintenance, and parts information for Fisher 480 Series yokeless piston actuators. Do not install, operate, or maintain 480 Series actuators without being fully trained and qualified in valve, actuator, and accessory installation, operation, and maintenance. To avoid personal injury or property damage, it is important to carefully read, understand, and follow all the contents of this manual, including all safety cautions and warnings.
  • Page 2 Instruction Manual 480 Series Actuators August 2012 D100291X012 Table 1. Fisher 480 Series Actuator Specifications Available Configurations Stroking Speeds See table 2 See the Actuator Configurations section. Operative Ambient Temperature Cylinder Pressure With Nitrile O-Rings: -46 to 80_C (-50 to 175_F) Maximum Allowable: 10.3 bar (150 psig)
  • Page 3 Instruction Manual 480 Series Actuators D100291X012 August 2012 Table 3. Fisher 3570 Actuator Specifications (1,2) Available Configurations Frequency Response 3570: Valve positioner with two relays and three See figure 3 pressure gauges for monitoring input signal and output pressures to the top and underside of the Pressure Connections actuator piston Vent: 3/8 NPT...

  • Page 4: Actuator Configurations

    Instruction Manual 480 Series Actuators August 2012 D100291X012 Figure 2. Supply Pressure and Thrusts SIZE 30 SIZE 40 ACTUATOR ACTUATOR SIZE 60 ACTUATOR THRUSTS IN THOUSANDS OF POUNDS (IN THOUSANDS OF NEWTONS) FOR ACTUATORS WITH POSITIONERS NOTE: MAY BE INCREASED BY 10% FOR ACTUATORS WITHOUT POSITIONERS. EITHER THIS THRUST, OR THE MAXUMUM ALLOWABLE LOADING FOR THE CONTROL DEVICE IS THE LIMITING FACTOR FOR USABLE ACTUATOR FORCE.

  • Page 5: Installation

    Instruction Manual 480 Series Actuators D100291X012 August 2012 Table 4. Action Under Normal Operating Conditions DESIRED PISTON MOTION ACTUATOR DESCRIPTION Down Direct-acting Increasing input signal pressure to bellows Decreasing input signal pressure to bellows With Positioner Reverse-acting Decreasing input signal pressure to bellows Increasing input signal pressure to bellows Supply pressure loaded on top of piston, Supply pressure loaded on bottom of piston,...

  • Page 6: Principle Of Operation

    Instruction Manual 480 Series Actuators August 2012 D100291X012 When 480 Series actuators are supplied to operate dampers, louvers, or similar equipment, a suitable mounting plate should be provided, and the piston rod of the actuator connected to the operating arm of the damper, etc., with appropriate linkage.

  • Page 7: Pressure Connections

    Instruction Manual 480 Series Actuators D100291X012 August 2012 the piston to the other. For most actuators in the 480 Series, this device is a 3570 positioner. However, a separate loading device must be provided for actuators without positioners. For actuators with positioners (figure 4), the pneumatic output signal from a controller or instrument is piped to the positioner bellows.

  • Page 8: Adjustments

    Instruction Manual 480 Series Actuators August 2012 D100291X012 The 481 actuator also requires 1/4 NPT external supply pressure piping. The 481 has only a pressure tap cover on top of the cylinder. Supply air pressure must be connected to it, and also to the lower cylinder connection located near the cylinder/cylinder flange joint.
  • Page 9 Instruction Manual 480 Series Actuators D100291X012 August 2012 1. Bypass the valve body or shut off the pressure in the pipeline. CAUTION The adjustable linkage between the actuator and the main valve should not be disconnected when the valve is open with fluid flowing.
  • Page 10 Instruction Manual 480 Series Actuators August 2012 D100291X012 Figure 7. Fisher 480 Piston Actuator - Size 30- 60 PARTS NOT SHOWN: 27 AND 112 40A9540-A...
  • Page 11 Instruction Manual 480 Series Actuators D100291X012 August 2012 Figure 8. Fisher 481 Piston Actuator - Size 30- 60 PARTS NOT SHOWN: 27, 78, 79, AND 112 40A9538-A...

  • Page 12: Parts Ordering

    Responsibility for proper selection, use, and maintenance of any product remains solely with the purchaser and end user. Fisher and TopWorx are marks owned by one of the companies in the Emerson Process Management business unit of Emerson Electric Co. Emerson Process Management, Emerson, and the Emerson logo are trademarks and service marks of Emerson Electric Co.

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