GAS ODORIZER Russian patent published in 1999 - IPC

FIELD: equipment for transportation of natural gas, gas distribution stations. SUBSTANCE: proposed gas odorizer has working vessel, metering cylinder fitted with mobile piston dividing metering cylinder into metering chamber of adjustable volume linked to working vessel and command pressure chamber connected through controlled electromagnetic valve to high-pressure source and control unit. In correspondence with invention mobile stepped piston forms with metering cylinder additional intermediate chamber coupled through controlled three- way electromagnetic valve to command pressure chamber and working vessel, metering and intermediate chambers are connected to odorized gas pipe-line. EFFECT: expanded functional capabilities, enhanced accuracy of metering, improved environmental control and simplified maintenance. 1 cl, 2 dwg