Profile: Samuel W. Hoke deals with small gas flow control valves for jeweler's torches. We design valves and fittings. Gyrolok® tube fittings insures a trouble-free, leak-tight system for all gaseous alternative fuels. Leak detective products are used to detect leaks in pressurized gas systems. Solenoid valves is designed for long cycle life and continuous duty for control and venting systems at pressures to 6,000 psi .