Ari chemical control valves ari stevir manufactures a wide range of control valves used in isolation or control processes they are available as globe valves or 3 way control valves with electric or pneumatic actuators that can be used for water at all temperatures steam neutral liquids gases thermal fluids hot oil and more they are ideal for chemical applications because they feature precision valve stems flexible plugs high capacity actuators and advanced control for mixing . Amazoncom control valves for the chemical process industries 9780070211766 fitzgerald bill books. Intelligent valve controllers advanced diagnostics software and loop tuning are all part of our performance solutions for the chemical industry that provide you with easy safe and reliable operation nelestm is known for providing the widest selection of valves for control on off and emergency shutdown applications each valve has been tested and certified in the most demanding circumstances to deliver the highest possible reliability because operating conditions vary greatly from one . Control valves for chemical reactions because the use of chemicals especially hazardous ones is such a precise process the control valve must often perform to exacting standards they are generally controlled electronically hydraulically pneumatically and even in some cases manually by trained operators