Part Number 1990C-1-XDA1 .75IPS 135PSI having (CAGE Code 16497) and FSC 4820 Valves Nonpowered in stock with ready to ship. Get an instant quote for 1990C-1-XDA1 .75IPS 135PSI Valve Safety Relief by Dresser Industries Inc. Fill the form below with your desired order quantity, targeted price and the expected order-fulfilment date. Our dedicated account manager will get back to you within 15 minutes.