Descriptors | Controllers, Gas flow, Flow regulators, Pressure regulators, Gas-powered devices, Safety measures, Valves, Diaphragm valves, Gas valves, Valve components, Design, Performance, 1st family gases, 2nd family gases, 3rd family gases, Leak tests, Flow rates, Durability, Grades (quality), Joints, Threads, Bending, Torque, Marking, Testing conditions, Torsion testing, Oil-resistance tests, Gas-resistance tests, Scratch tests, Damp-air tests, Instructions for use, Installation |