Part Number MB1 1-4 having (CAGE Code 53059) and FSC 4820 Valves Nonpowered in stock with ready to ship. Get an instant quote for MB1 1-4 Valve Regulating Temperature by Spirax Sarco 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.