39MV-2-CC-GS3900 Pilot Operated Relief Valves Modulating Action. Metal Seat. Gas Service 39MV07 & 37-2-CC-GSIM1a.jpgIM1.htm3900-5-MS-GS-HH 45490839MV22 & 72-2-CC-GSIM2a.jpgIM2.htm3900-5-MS-GS-HH 45490939MV07 & 37-2-CC-GSIM3a.jpgIM3.htm3900B-5-MS-GS-HH 454918 DOUBLE OUTLET39MV22 & 72-2-CC-GSIM4a.jpgIM4.htm3900B-5-MS-GS-HH 454956 DOUBLE OUTLET