Fisher EMERSON P539 Instruction Manual

Instruction Manual
MCK-2161
July 2014
Type P539 Pneumatic Actuator with Type P539A
Hardware Retrofit Kit
WARNING
!
Failure to follow these instructions or
to properly install and maintain this
equipment could result in an explosion
and/or fire causing property damage and
personal injury or death.
Fisher equipment must be installed,
®
operated and maintained in accordance
with federal, state and local codes and
Emerson Process Management Regulator
Technologies, Inc. instructions. The
installation in most states must also
comply with NFPA No. 58, ANSI K61.1 and
DOT standards.
Only personnel trained in the proper
procedures, codes, standards and
regulations of the LP-Gas or Anhydrous
Ammonia (NH ) industries should install
3
and service this equipment.

Introduction

This product kit manual provides instructions for
easy upgrade of Type P539 pneumatic actuator to a
Type P539A actuator with minimum parts and the
re-use of air chamber and clevis from the Type P539.
CAUTION
Only qualified service person should
attempt to repair these valves.
P1187
Figure 1. Type P539A Installed on N550/N551 Series (ESV)
To prevent personnel injury and or
property, before starting any type of repair,
close off the upstream valves and remove
all gas pressure from both the outlet
and inlet sides of the N550/N551 Series
Emergency Shut-off Valve (ESV).

Type P539 Removal

Refer to Figure 4. The following repair steps can be
completed with the N550/N551 Series (ESV) installed in
the line:
1. Follow Warning above and depressurize the
inlet and outlet side of the Emergency Shut-off
Valve (ESV).
2. Ensure there is no pressure on the pressure supply
line to the actuator.
www.fisherregulators.com
Type P539A
WARNING
!