Inbal Valves embody a breakthrough in the conceptual design of automatic water control valves. Developed from basic principles, they are free of limitations imposed by the human hand, which characterize conventional control valves such as clapper, latch, or diaphragm actuated types. The major concept that led to the development of the Inbal Valve is the N.M.M.P. (No Moving Mechanical Parts), a significant feature in fire protection systems where long life of reliable operation is considered the first criterion in selecting equipment, particularly control valves.
The Inbal valves are listed by Underwriters Laboratories (UL), approved by Factory Mutual (FM), and Type Approved by Lloyd’s Register,
American Bureau of Shipping (ABS), and Det Norske Veritas (DNV)*.
All Inbal valves are rated to 300 psi (21 bar), and are available in sizes 1½” to 12″ (40 to 300 mm) with threaded, flanged, wafer, or grooved ends.
As standard, Inbal Valves are made of Ductile Iron ends and Steel housing – both epoxy coated. A large variety of optional materials including Cast Steel, Stainless Steel, Bronze, Nickel-Aluminum-Bronze, and Titanium are available from stock. Optional coating such as high built epoxy or Halar ®can be supplied upon request.
The control trim, as standard is made of  Stainless Steel and Brass, Nickel- Chrome plated. It is supplied unless required otherwise, pre-assembled in sections. The trim package is compact, incorporates innovative components, and is designed for quick mounting, dependable operation and easy resetting, The widest range of pilot valves, actuators, and accessories enables the selection of the Inbal components to ideally adapt to the specified requirements.
The small physical dimensions and the low weight enable the Inbal  Valve and the trim assembly to occupy much less space and reduce significantly the time and labor needed for installation. Moreover, the simple design of the Inbal Valve and the control trim, ease of operation, and the low maintenance, reduce the life cycle cost. The Inbal Valve withstands pressure surges and it is entirely resistant to false tripping. Opening is quick, yet smooth, virtually eliminating water hammer.
The unique design and variety of materials and coatings make the Inbal  Valve ideally suitable for use in brackish or sea water and in corrosive environments similar to those found in oil refineries,  petrochemicals,  chemical and steel plants, power stations, as well as production platforms, drilling rigs, floating storage  tanks, and other marine applications.
All Inbal Valves are fully tested, before being supplied, at similar conditions of flows and pressures to those designated.