The SDI BLENDAIRE ® LPG/Air mixer safely and accurately combines LPG va por with compressed air to deliver a natural gas compatible mixture at pressures from 10 psig [0.7 kg/cm2] to 150 psig [10.3 kg/cm2]. The LPG/air mix ture created by the BLENDAIRE ® will burn with the same characteristics and efficiency as natural gas plus it does not require burner adjustments.
The BLENDAIRE® offers high pressure mixing to feed city utilities or supplement natural gas pipeline distribution. The heart of the BLENDAIRE® is a piston suspended within a three port mixing valve. Compressed air enters one port. LPG vapor enters an other port, and a mixture of LPG/air that is compatible with natural gas discharges from the third port. Horizontal rotation of the piston increases or decreases the volumetric ratio of LPG vapor to air, hence increasing or decreasing the calorific value of the LPG/Air mix ture within a tolerance +/-2%. Vertical travel of the piston increases or decreases the volumetric flow of LPG/Air. Since the BLENDAIRE® is pressure balanced, it responds quickly to load changes. Both the air line and LPG vapor line have check valves to en sure safe mix ing. In addition, sufficient air pressure must be available be fore the gas regulator will open to al low the mixing process to proceed.