Laminar Pte Ltd Singapore

Laminar Pte Ltd


Sewage Air Valves

Group 1 1
Group 1 1


Sewage grease, corrosive gases, solids, and microorganisms in sewage combine to challenge maintenance and increase the risks of pipeline components in wastewater pipeline systems. 

Laminar air valves facilitate efficient discharge and admission of air from pressurised sewage systems. They prevent confined air or gases from jeopardising the system’s performance and effectiveness. The valve’s elongated body design reduces the possibility of suspended solids, greases, debris, or oils clogging the orifice or causing the mechanism to malfunction and stick. For ease of maintenance and safety of operators, the air valve is equipped with a drain plug to allow regular flushing of sediments, grease and particles.

The Laminar range of wastewater air valves is based on stainless-steel internal components with a float on an extended operating stem to ensure the valve is closed before the medium reaches the sealing level. Our air valves offer tight sealing at pressures from 0.2 bar.

Laminar offers a comprehensive range of sewage and wastewater air valves, available in stock and with short lead times. The experience gained in Southeast Asia and the Middle East markets, where pumped sewage and wastewater systems have been standard practice for many years, formed the basis for the laminar range of air valves. The range of valves is broad and flexible to meet the needs of both site engineers and specifications.



10, 16


25 to 200


Sewage | Wastewater | Seawater


Wastewater treatment plants | Seawater desalination plants | Power plants | Industrial applications


  • Sealing system: resilient seated 
  • Single-chamber & double-chamber air valves in compact design 
  • Double orifice type with a large orifice for automatic ventilation of the pipeline and a smaller orifice for automatic release of air pockets during operation under pressure
  • Triple-function Air Valve: 
    • Large orifice to admit air during emptying of the pipeline
    • Large orifice to release air while filling the pipeline
    • Small orifice to release air during normal working conditions
  • Corrosion-proof due to stainless steel inner parts and float can be plastic or stainless steel
  • High discharge capacity up to sonic velocity due to stabilized floater
  • Safe and reliable operation even at high air-release velocities
  • All operating components are made of specially selected, corrosion-resistant materials
  • Can be mounted with an isolating valve like a lug-type butterfly valve with a hand lever, gate valve or ball valve
  • Minimum operation pressure: 0.2 bar


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