




Vent-Tech Model SXG
Compact and High-Performance Sewer Valve
The Vent-Tech Model SXG Sewer Valve delivers compact performance without compromise. Designed for applications requiring 3″ to 8″ valves, this low-pressure sealing CARV is the go-to solution when installation space is limited and reliable performance is non-negotiable.
Engineered with a shorter body than the SWG, the SXG offers enhanced flow dynamics and effective sealing at greater than 1 psi. Its streamlined footprint makes it ideal for confined installations and a dependable upgrade from outdated ball-and-lever valves. When height is a constraint but performance can’t be, the SXG delivers industry-leading results with a design built for today’s infrastructure challenges.
- Compact design ideal for confined spaces
- Low pressure sealing operates effectively at greater than 1 psi
- Excellent vacuum flow rating for optimized pipeline efficiency
- Proven cylindrical design offers reliable performance
- Low maintenance construction in 316L stainless steel ensures durability
- Rapid-acting surge protection ensures system stability
- Enhanced wear resistance for demanding sewer environments
- Vacuum and water-hammer protection safeguards infrastructure
- Best-in-class engineering trusted for critical applications
Interested in the Vent-Tech Model SXG but need more technical details?
Submit your information to request secure, product-specific documents. Our team will review your submission and, if approved, email you an invitation to access the requested materials.
Vent-Tech Valve Series Configurations


SERIES-C Combination Air Valves
Note to Engineer
Series C Valves are similar to Combination Air Release Valves (CARV’s) combining an Air/Vacuum Valve with an Air Release Valve. Vent-Tech series C valves provide the additional functionality of Surge Control with the inclusion of an Anti-Surge device. When the Anti-Surge device is activated, it causes the main orifice to close and forces the exhausting air through much smaller orifices which will choke the flow resulting in a pressure independent, constant ACFM volume change inside the pipeline, thus controlling water-hammer velocities.
Shall be four (4) function valves designed to:
- Exhaust large quantities of air at start-up during the filling of a pipeline system.
- Prevent the development of hydraulic transients (surge control) during start-up and pressure surges and shall operate automatically.
- Release accumulated air in a pipeline system while the system is operational and under pressure.
- Open and admit large quantities of air into the pipeline system during draining or if negative pipeline pressure occurs.


SERIES-B Biased Combination Air Valves
Note to Engineer
Series B Valves are similar to Vent-Tech Series C Valves. Vent-Tech Series B valves are configured so that the Anti-Surge device is mechanically pre-activated. Series B Valves—CARVs fitted with a bias mechanism—are normally located:
- As the first valve after a pump and prior to the check valve.
- Immediately downstream of an inline check valve.
- Immediately following any in-line isolation valves.
- Pipeline designers should consider the use of bias valves in flat terrain e.g., if the upstream or downstream gradient approximates 1%.
Shall be four (4) function valves designed to:
- Exhaust controlled quantities of air at start-up during the filling of a pipeline system.
- Prevent the development of hydraulic transients (surge control) during start-up and pressure surges and shall operate automatically.
- Release accumulated air in a pipeline system while the system is operational and under pressure.
- Open and admit large quantities of air into the pipeline system during draining or if negative pipeline pressure occurs.