Table of Contents
Advertisement
ES-800 and ES-900 Series
Specifications
The Specifications section on this page provides specifications for the ES-800 and ES-900 Series vent valves.
Specifications 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
(1)
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.
ES
Model ES-800-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-800-SO
pressure/vacuum except they omit the vacuum side of
the valve that eliminates the possibility of two way flow.
Model ES-900-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-900-SO has both
pressure and vacuum relief capability.
Model ES-900-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-900-PSO only
has pressure relief capability.
Principle of Operation
ES-800 and ES-900 Series vent valves are designed
to prevent the escape of light ends of crude by
maintaining presssure in the storage tank.
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 orifice and relieving the pressure
or vacuum buildup. The valve closes once the tank
pressure goes below the set pressure.
2
Approximate Weight
8
20
Series
Size
8 = 800
20 = 2 in.
9 = 900
30 = 3 in.
40 = 4 in.
Figure 3. Model Number Identification
Model Identification
Tagging Information
For ES-800 Series, the nameplate is located on the
unit's lid and for ES-900 Series, the nameplate is
located on the unit's hood. Actual layout of nameplate
may vary.
Installation
ES-800 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-900 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
PSO
Pressure Type
SO = Pressure and Vacuum
PSO = Pressure Only
WARNING
!
Wear protective gloves and clothing
to prevent skin contact when handling
lead weights. Wear eye protection.
Avoid breathing dust/fumes/mist/vapors/
spray. Do not eat, drink or smoke while
using the product. Avoid release to the
environment. Wash hands with soap and
water after handling. Keep away from
excessive heat and open flames.
Advertisement
Table of Contents
