Design is standard on all 1/4 to 1/2 in. and 6 to 12mm stainless steel tube fittings to help installers make more consistent, leak-tight tube connections. Tube fitting companents provide exceptional dimensional, metallurgical, and mechanical uniformity that allow predictable, repeatable installation. Tube fittings are available in a variety of materials, including controlled-chemistry 316 stainless steel and many other alloys for enhanced corrosion resistance in a variety of applications, including sour gas . Regulators reduce the pressure of a gas or liquid from a source, such as a cylinder or compressor, to a lower value needed by a device, such as an analyzer. A pressure regulator provides better resolution and control when its inlet and control range pressures closely match the pressure requirements of the fluid handling system. Leak-tight seals that will withstand high pressure, vibration, vacuum, and temperature changes depend on close tolerances and consistent, exacting quality control in conjunction with good design principles.