End Of Line Stack Vent Valve Model 900

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Technical Data

Sesco SKU:tp-062 Category: Brand:

Available on backorder


Series 900 End Of Line Vent Valve is designed to prevent the escape of light and 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 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 ta 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 & 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 -45° C to 260° C
• Multiple setting options by adding additional pressure weights

• Viton gaskets far “Sour Gas” and corrosive service applications
• Non-Corrosive coating option far extremely harsh environments
• Certified flow capacities in accordance with API


Valve Setting Range

  • Model number: Model 920 – 930 – 940
  • Sizes Available: 2″(50mm), 3″(80mm), 4″(100mm).
  • Pressure: 4.3 to 69.0 mbar
  • Vacuum: 1.7 mbar


Model 900 End of Line Vent Valve Parts

model 900 vent valve parts

Ref. No.Part Description2 inch3 inch4 inch
1Valve BodyA2S01A3S01A4S01
5Hinge Pin5-C5-C5-C
6Cap Hinge Pin5-N5-N5-N
7Pressure Disc2P4P3P4P4P4P
8Pressure Gasket2P4G3P4G4P4G
9Pressure Seat2P4P-33P4P-34P4P-3
10Slip-On FlangeO-2O-3O-4
11Flange GasketS-2-GS-3-GS-4-G
12Bolt & Nut1/2x13x2-1/21/2x13x31/2x13x3
13Hinge Pin ClipHPC-148HPC-148HPC-148
14Vacuum Disc2V4P3V4P4V4P
15Vacuum Gasket2V4G3V4G4V4G
16Vacuum Seat2V4P-33V4P-34V4P-3
17Pressure Weight2-PW-1/22-PW-12-PW-1
18Lever Spring900-33900-33900-33
19Test Lever2-S-83-S-84-S-8