valve assembly lp suction unloading drawing no. emd pt. no. 9319947. note :- (1) firm is rdso approved for child part and its assly. air compressor (water cooled) vide rly.bd.l.no.2013/m(l)/466/5(402) dt. 04.09.13 for hhp locos. (2) m/s maco corporation/kolkata is auth. rep. of m/s gardener denver/usa.