Emerson ES-805 Series, ES-905 Series, ES-805-SO, ES-805-PSO, ES-905-SO Instruction Manual
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Instruction Manual
D104466X012
ES-805 and ES-905 Series
April 2019
ES-805 and ES-905 Series Vent Valves
Table of Contents
Introduction ............................................................................1
Specifications ........................................................................2
Principle of Operation ............................................................2
Model Identification................................................................2
Installation .............................................................................2
Maintenance ..........................................................................5
V-ring Replacement ...............................................................6
Retrofit ES-805 and ES-905 Series Pallet Assembly ............6
Parts Ordering .......................................................................6
Parts List................................................................................7
Figure 1. Typical ES-805 Series In-Line Vent Valve
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.
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 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 vent valves.
Introduction
Scope of the Manual
This Instruction Manual provides instructions for installation,
maintenance and parts ordering guide for the ES-805 and
ES-905 Series vent valves.
Figure 2. Typical ES-905 Series End-of-Line Vent Valve
WARNING
!
The ES-805 and ES-905 Series vent valves is
not necessarily grounded when installed on
berglass reinforced plastic tanks unless the
base is electrically bonded to the tank.
To avoid personal injury or property damage
resulting from the effects of a static electricity
discharge from hatch components in a
hazardous atmosphere or where the process
uid is combustible, electrically bond the base
to the tank with grounding strap.
North America Only
ES-805 and ES-905 Series
Specications
The Specications section on this page provides specications for the ES-805 and ES-905 Series vent valves. Specications
such as model number, connection size, date of manufacture, valve type, seal materials and pressure/vacuum settings are
stamped on the nameplate attached to the vent valve. Weights are keyed to the pallet stem. Every weight is stamped with the
setting (oz.), the valve size and the part number.
Available Construction
See Figure 3
Available Sizes
2 through 4 in. / 50 through 100 mm
Set Pressure/Vacuum
See Table 1
Construction Materials
See Table 2
1. The pressure limits in this Instruction Manual and any applicable standard or code limitation should not be exceeded.
(1)
ES 8 25 PSO
Series
8 = 805
9 = 905
Figure 3. Model Number Identification
Size
25 = 2 in.
35 = 3 in.
45 = 4 in.
Product Description
ES-805 and ES-905 Series vent valves represent the latest
development in high-performance, tight-sealing tank venting
products and complement Enardo™’s industry-leading
ES-665 Series thief hatch product line. With a leakage
rate of no more than 0.1 SCFH at 90% of set point, the
ES-805 and ES-905 Series offers unparalleled vent
valve performance.
Model ES-805-SO - is an In-line vent valve. It is installed
directly into the vent line exhaust. The Model ES-805-SO
has both pressure and vacuum relief capability.
Model ES-805-PSO - is a pressure only vent valve designed
to relieve pressure only through the vent line. It is designed
the same as the Model ES-805-SO pressure/vacuum except
they omit the vacuum side of the valve that eliminates the
possibility of two way ow.
Model ES-905-SO - is an end-of-line vent valve. The
end-of-line vent valve is installed directly on the end of the
vent line exhaust. The Model ES-905-SO has both pressure
and vacuum relief capability.
Model ES-905-PSO - is an end-of-line vent valve. The
end-of-line vent valve is installed directly on the end of the
vent line exhaust. The Model ES-905-PSO only has pressure
relief capability.
Principle of Operation
ES-805 and ES-905 Series vent valves are designed to
prevent the escape of light ends of crude by maintaining
pressure in the storage tank.
Approximate Weight
ES-805 Series Vent Valve
2 In. / 50 mm body: 12 lbs. / 5 kg
3 In. / 80 mm body: 17 lbs. / 8 kg
4 In. / 100 mm body: 23 lbs. / 10 kg
ES-905 Series Vent Valve
2 In. / 50 mm body: 11 lbs. / 5 kg
3 In. / 80 mm body: 15 lbs. / 7 kg
4 In. / 100 mm body: 19 lbs. / 9 kg
The vent valve opens when the system pressure or vacuum
exceeds the set pressure of the valve. When over pressure
occurs, the pallet lifts, breaking the seal between the seat
and pallet, allowing vapors to pass through the valve orice
and relieving the pressure or vacuum buildup. The valve
closes once the tank pressure goes below the set pressure.
Model Identication
Tagging Information
For ES-805 Series, the nameplate is located on the unit’s lid
and for ES-905 Series, the nameplate is located on the unit’s
hood. Actual layout of nameplate may vary.
Installation
The valve and its pallet assembly are shipped
separately. The pallet assembly may be heavy
and can cause personal injury or damage to the
unit if not handled with care.
All wing-nuts shall be hand tightened only.
Tools are not to be used.
Prior to installation, remove the unit from its packaging
and discard any protective coverings. Below is a list of
instructions that are recommended for the installation of an
Enardo vent valve.
Pressure Type
SO = Pressure and Vacuum
PSO = Pressure Only
WARNING
!
North America Only
2
ES-805 and ES-905 Series
ES-905 SERIES NAMEPLATE LOCATION ES-805 SERIES NAMEPLATE LOCATION
Figure 4. Nameplate Location
Figure 6. Nameplate ExampleFigure 5. ES-805 and ES-905 Series Weights
Table 1. Vent Setting Range
MODEL SIZE PRESSURE VACUUM
ES-805-SO
ES-805-PSO N/A
ES-905-SO 0.4 oz./sq.in. / 1.7 mbar
ES-905-PSO N/A
2 through 4 in. / 50 through 100 mm
1.0 to 16.0 oz./sq.in. / 4.3 to 6.90 mbar
(0.5 oz./sq.in. / 2 mbar increments)
0.4 oz./sq.in. / 1.7 mbar
Table 2. Construction Materials
MODEL HOUSING PALLET V-RING SEAL HARDWARE WEIGHTS GASKETS
ES-805-SO
ES-805-PSO
ES-905-SO
ES-905-PSO
Cast Aluminum Aluminum
Nitrile (NBR) or
Fluorocarbon (FKM)
Zinc-plated carbon steel
Zinc-plated carbon steel
(to 12 oz./sq.in.)
or Lead
Nitrile (NBR) or
Fluorocarbon (FKM)
North America Only
3
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