VALVE; MODIFIER: DRAIN; MANUFACTURER NAME: INGERSOLL RAND; PART NUMBER:, PNLDII28; ADDITIONAL FEATURES: FULLY PNEUMATIC DRAIN WITH NO NEED FOR ELECTRICITY; SERVICES AIR SYSTEMS, PNEUMATIC DRAINAGE WITH NO NEED FOR ELECTRICITY; SERVICES HIGH VOLUME COMPRESSED AIR SYSTEMS UP TO 30, HIGH VOLUME COMPRESSED AIR SYSTEMS UP TO 30,000 CFM (850M3 MI, N ); TRANSPARENT CYLINDERS ALLOW EASY VISUAL OPERATING INSPECTION