Enardo 860 and 960 Series Spring-Loaded
Pressure/Vacuum Relief Valve (ATEX Approved)
Table of Contents
Introduction .................................................................. 1
Specifications .............................................................. 2
Product Identification and Marking .............................. 4
Principle of Operation .................................................. 4
Installation ................................................................... 5
Maintenance ................................................................ 9
Weight Information .................................................... 11
Valve Repair .............................................................. 11
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WARNING
Failure to follow these instructions or
to properly install and maintain this
equipment could result in an explosion,
re and/or chemical contamination
causing property damage and personal
injury or death.
Fisher™ spring-loaded pressure/vacuum
relief valve must be installed, operated
and maintained in accordance with
federal, state and local codes, rules
and regulations, and Emerson Process
Management Regulator Technologies
Tulsa, LLC (Emerson) instructions.
Failure to correct trouble could result in
a hazardous condition. Call a qualied
service person to service the unit.
Installation, operation and maintenance
procedures performed by unqualied
person may result in improper adjustment
and unsafe operation. Either condition may
result in equipment damage or personal
injury. Only a qualied person shall install
or service the spring-loaded pressure/
vacuum relief valve.
Figure 1. Enardo Model 860 Spring-Loaded Pressure/
Vacuum Relief Valve
Figure 2. Enardo Model 960 Spring-Loaded Pressure/
Vacuum Relief Valve
Introduction
Scope of the Manual
This Instruction Manual provides instructions for
installation, maintenance and parts ordering information
for the Enardo 860 and 960 Series spring-loaded
pressure/vacuum relief valve (SL-PVRV).
Instruction Manual
D103814X012
February 2022
Enardo 860 and 960 Series
Outside North America Only
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