Fisher Controls Product Schematic, courtesy of RMC Process Controls & Filtration, Inc. & www.RegulatorParts.com. Repair kits in stock for standard equipment as well as those "hard to find" kits & parts. Choose from an extensive inventory of Fisher regulators, controllers, valves & replacement parts. From orifices to springs to disc holders, it's all in stock & ready to ship today! Now over 12,000 parts in stock! Contact us today at Sales@RegulatorParts.com or 800-523-4055. Individual, quantity, wholesale, & O.E.M. distribution discounts available.