Fisher Controls Product Bulletin. Brought to you courtesy of RMC Process Controls & Filtration, Inc. & www.RegulatorParts.com. Extensive inventory of Fisher regulator, valve & controller replacement parts; from diaphragms to orifices, from springs to discs, from regulators to repair kits, it's all in stock & ready to ship today! Sales@RegulatorParts.com or 800-523-4055. Individual, quantity, wholesale, & O.E.M. distribution discounts available.