This company has been setting the standards for control valves used on industrial processes for over 50 years. The diaphragm operated design gives them the ability to be used as steam valves, modulating control valves, two-pressure hydraulic control valves, pressure regulating, and pressure relief valves. These valves are perfect for high pressure service, hot and cold water, air, and inert gas service. You can use their control modules for maintaining and balancing the air pilot signals. They also offer high pressure check valves.