Design and manufacturing valves for the power generation, industrial, marine and oil and gas markets for over a century. From high quality regulators with 99% accuracy to severe service control valves that provide zero leakage, Leslie controls products are known throughout the world. Products include steam conditioning valves, desuperheater valves, control valves, instrumentation, pressure and temperature regulators, steam water heaters, remanufacturing and repair services. 2-way, 3-way, pneumatically and manual self actuated.