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ES-800 and ES-900 Series Vent Valves
Instruction Manual
D103855X012
April 2020
Table of Contents
Introduction ..................................................................1
Specifications ..............................................................2
Principle of Operation ..................................................2
Model Identification......................................................2
Installation ...................................................................2
Maintenance ................................................................5
Parts Ordering .............................................................6
Parts List......................................................................6
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™ vent valves 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 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 vent valves.
Introduction
Scope of the Manual
This Instruction Manual provides instructions for
installation, maintenance and parts ordering guide for
the ES-800 and ES-900 Series vent valves.
Product Description
ES-800 and ES-900 Series vent valves represent the
latest development in high-performance, tight-sealing tank
venting products, and complement Enardo’s industry-
leading ES-600 Series thief hatch product line. With a
leakage rate of no more than 1 SCFH at 90% of set point,
the ES-800 and ES-900 Series offers unparalleled vent
valve performance.
Model ES-800-SO –
is an In-line vent valve. It is
installed directly into the vent line exhaust. The
Model ES-800-SO has both pressure and vacuum
relief capability.
Figure 2.
Typical ES-900 Series End-of-Line Vent Valve
Figure 1.
Typical ES-800 Series In-Line Vent Valve
ES-800 and ES-900 Series
North America
Only