Part Number 31M-18-1B having (CAGE Code 21013) and FSC 4820 Valves Nonpowered in stock with ready to ship. Get an instant quote for 31M-18-1B Diaphragm Actuator Valve Special by Metrex Valve Corp. 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.