860 and 960 Series
February 2022
North America
Only
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,
fire and/or chemical contamination
causing property damage and personal
injury or death.
Enardo 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 qualified
service person to service the unit.
Installation, operation and maintenance
procedures performed by unqualified
person may result in improper
adjustment and unsafe operation. Either
condition may result in equipment
damage or personal injury. Only a
qualified person shall install or service
the 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 860 and 960 Series spring-loaded
pressure/vacuum relief valve (SL-PVRV).
Figure 1.
Model 860 Spring-Loaded Pressure/
Vacuum Relief Valve
Figure 2.
Model 960 Spring-Loaded Pressure/
Vacuum Relief Valve
Instruction Manual
D103813X012