ENARDO PVRV
End of Line Stack Vent Valve, Model 900-SO
Enardo Series 900-SO End-of-Line Vent Valve is
designed to prevent the escape of light ends of crude by
maintaining pressure in the storage tank. The end-of-line
vent valve is installed directly on the end of the vent line
exhaust. The 900-SO has both pressure and vacuum relief
capability.
The pressure vacuum vent valve opens when the system
pressure or vacuum exceeds the set pressure of the
valve. When over pressure occurs the weighted 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 setting point.
Features and Benefits
• All internal working parts are made from a "PPS"
(Polyphenylene Sulfide) plastic material for superior
corrosion resistance which resists freezing and sticking
with operating ranges from -50° F to 500° F.
• Viton gaskets for "Sour Gas" and corrosive service
applications
• Non-Corrosive coating option for extremely harsh
environments
• Multiple setting options by adding additional pressure
weights
• Certified flow capacities in accordance with API
Vent Setting Range
Model Numbers
Sizes Available
Pressure
Vacuum
Model 900-SO
2" (50 mm) through
4" (100 mm)
1.0 to 16.0 oz/sq. in. (0.5 Increments)
(4.3 to 69.0 mbar)
0.4 oz/sq. in.
(1.7 mbar)
Materials of Construction
Housing
Seat / Pallet
Pallet Seal
Hardware
Weights
Gaskets
Cast Aluminum
PPS
Buna-N
Viton
Zinc Plated C.S.
Lead
Buna-N
Viton
9932 East 58th Street | Tulsa, OK 74146-6411 USA | +1-918-622-6161 | 1-800-336-2736 U.S./Canada
59
Revision A
ENARDO PVRV
End of Line Stack Vent Valve
Model 900-SO
Model 900-SO Dimensions
Model
Size
In. (mm)
A
In. (mm)
B
In. (mm)
C
Height In. (mm)
Approximate
Weight Lb. (Kg)
920
2 (50)
10 (260)
1- 1/8 (29)
11- 1/4 (286)
11 (5)
930
3 (80)
12 (300)
1- 3/4 (44)
13- 1/4 (337)
16 (7)
940
4 (100)
14 (360)
1- 7/8 (48)
15- 1/4 (387)
25 (11)
Unit weights indicate Net Weight of valve in pounds at standard set pressure (1.0 oz/sq.in. pressure - 0.4 oz/sq.in. vacuum),
does not include shipping crate or box. Add 20% for gross shipping weight (Domestic Only).
Model 900-SO In-line Vent Valve
Ref. No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
Part Description
Valve Body
Cap
Eyebolt
Wing Nut
Hinge Pin
Cap Hinge Pin
Pressure Disc
Pressure Gasket
Pressure Seat
Slip-On Flange
Flange Gasket
Bolt &Nut
Hinge Pin Clip
Vacuum Disc
Vacuum Gasket
Vacuum Seat
Pressure Weight
Lever Spring
Test Lever
2 inch
A2SO1
2-S-3
S31B
NPN
5-C
5-N
2P4P
2P4G
2P4P-3
0-2
S-2-G
1/2x13x2-1/2
HPC-148
2V4P
2V4G
2V4P-3
2-PW-1/2
900-33
2-S-8
3 inch
A3SO1
3-S-3
S31B
NPN
5-C
5-B
3P4P
3P4G
3P4P-3
0-3
S-3-G
1/2 x 13 x 3
HPC-148
3V4P
3V4G
3V4P-3
2-PW-l
900-33
3-S-8
4 inch
A4SO1
4-S-3
S31B
NPN
5-C
5-DD
4P4P
4P4G
4P4P-3
0-4
S-4-G
1/2 x 13 x 3
HPC-148
4V4P
4V4G
4V4P-3
3-PW-1
900-33
4-S-8
ENARDO | www.enardo.com
60
Revision A