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MaxAir™ II 5"x4" Internal Valve
The Civacon MaxAir™ II 5x4 Air Operated Emergency Valve is an optimal choice for petroleum applications. The MaxAir™ II series valves are uniquely engineered with no moving parts in the flow path for a superior flow rate.
Civacon's 5x4 MaxAir™ II Emergency Valve is designed with an independent external exhaust, which isolates the valve exhaust from the rest of the system. This valve is compatible with diesel, biodiesel, gasoline, ethanol and methanol products. The Viton GFLT and Teflon encapsulated seals provide ultimate product compatibility.
It features an integrated air inlet that allows the unit to close if it becomes sheared in the result of an accident. It incorporates a frangible shear groove per 49CFR178.345-5 tested per TTMA RP 84. A factory installed fusible plug that will melt at a temperature of 212° F (100° C) allowing the valve to deplete air pressure. Also included is a mechanical jack screw for manual operation in the event of air pressure loss.
Operating Pressure Requirements: Minimum of 40 psi (4.83 bar) operating line pressure.
Request More Information 5"x 4" MAXAIR II Internal Valve Brochure
Features & Benefits
- Designed for petroleum applications
- No moving parts in flow path for superior flow rates and faster drops
- Integrated external exhaust
- Viton GFLT and Teflon encapsulated seals for superior compatibility
- Mechanical jack screw opening allows product to be off-loaded in the event of air pressure loss
- Compatible with 4" TTMA sumps
- Compatible with diesel, biodiesel, gasoline, ethanol and methanol
- Aluminum body and poppet, stainless steel shaft and spring
- Available in a variety of configurations
- Operating Pressure Minimum 40 psi (2.06 bar) line pressure
Part Numbers and Drawings
(click on the part number to view/download parts breakdown and drawing)
- VA5181 90° Elbow/Victaulic Internal Air/External Exhaust Viton Seal
- VA5182 90 Elbow/Victaulic Internal Air/External Exhaust Tef-o-Sil Seal
- VA6181 90° Elbow/Flanged Internal Air/External Exhaust Viton Seal
- VA6182 90 Elbow/Flanged Internal Air/External Exhaust Tef-o-Sil Seal
- VA7181 Straight/Victaulic Internal Air/External Exhaust Viton Seal
- VA7182 Straight/Victaulic Internal Air/External Exhaust Tef-o-Sil Seal
- VA8181 Straight/Flanged Internal Air/External Exhaust Viton Seal
- VA8182 Straight/Flanged Internal Air/External Exhaust Tef-o-Sil Seal
Repair Parts
| Old Part Number | New Part Number | Description | Manufacture Date |
| 12576VRK | 13139VRK | Seal Repair Kit (Viton) | After 07/31/17 |
| 12577RK | 13139RK | Seal Repair Kit (Tef-O-Sil) | After 07/31/17 |
| 13139VRK-P | Seal Repair Kit w/ Poppet (Viton) | Before 07/31/17 | |
| 13139RK-P | Seal Repair Kit w/ Poppet (Tef-O-Sil) | Before 07/31/17 |
Brochures, Parts Breakdown, Installation Manuals
-
5"x 4" MAXAIR II Internal Valve Brochure
-
VA5182 90 Elbow/Victaulic Internal Air/External Exhaust Tef-o-Sil Seal
-
VA6182 90 Elbow/Flanged Internal Air/External Exhaust Tef-o-Sil Seal
-
MaxAirII Seal Repair Kit, Repair Manual
Videos
Civacon's How to Order a MaxAir™ Seal Kit - Spanish
Features & Benefits
- Designed for petroleum applications
- No moving parts in flow path for superior flow rates and faster drops
- Integrated external exhaust
- Viton GFLT and Teflon encapsulated seals for superior compatibility
- Mechanical jack screw opening allows product to be off-loaded in the event of air pressure loss
- Compatible with 4" TTMA sumps
- Compatible with diesel, biodiesel, gasoline, ethanol and methanol
- Aluminum body and poppet, stainless steel shaft and spring
- Available in a variety of configurations
- Operating Pressure Minimum 40 psi (2.06 bar) line pressure
Part Numbers and Drawings
(click on the part number to view/download parts breakdown and drawing)
- VA5181 90° Elbow/Victaulic Internal Air/External Exhaust Viton Seal
- VA5182 90 Elbow/Victaulic Internal Air/External Exhaust Tef-o-Sil Seal
- VA6181 90° Elbow/Flanged Internal Air/External Exhaust Viton Seal
- VA6182 90 Elbow/Flanged Internal Air/External Exhaust Tef-o-Sil Seal
- VA7181 Straight/Victaulic Internal Air/External Exhaust Viton Seal
- VA7182 Straight/Victaulic Internal Air/External Exhaust Tef-o-Sil Seal
- VA8181 Straight/Flanged Internal Air/External Exhaust Viton Seal
- VA8182 Straight/Flanged Internal Air/External Exhaust Tef-o-Sil Seal
Repair Parts
| Old Part Number | New Part Number | Description | Manufacture Date |
| 12576VRK | 13139VRK | Seal Repair Kit (Viton) | After 07/31/17 |
| 12577RK | 13139RK | Seal Repair Kit (Tef-O-Sil) | After 07/31/17 |
| 13139VRK-P | Seal Repair Kit w/ Poppet (Viton) | Before 07/31/17 | |
| 13139RK-P | Seal Repair Kit w/ Poppet (Tef-O-Sil) | Before 07/31/17 |
Brochures, Parts Breakdown, Installation Manuals
-
5"x 4" MAXAIR II Internal Valve Brochure
-
VA5182 90 Elbow/Victaulic Internal Air/External Exhaust Tef-o-Sil Seal
-
VA6182 90 Elbow/Flanged Internal Air/External Exhaust Tef-o-Sil Seal
-
MaxAirII Seal Repair Kit, Repair Manual
Videos
Civacon's How to Order a MaxAir™ Seal Kit - Spanish
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Technical Support
Contact Us for Technical Support on Your Projects and Resolving Any Technical Issues You Encounter
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