Calgaz offers a choice of standard high pressure regulators for use with our High Pressure Cylinders (HPC’s).  The R21 is a single-stage, high purity regulator, designed for applications where low flow is required. It is also supplied with 1/4” NPT Female inlet and outlet fittings. R21 is also available in nickel-plated brass and stainless steel.  Calgaz regulators are designed, meticulously hand-assembled, then rigorously inspected by highly experienced professionals in our Cambridge, Maryland facility. Every single regulator is function tested and leak checked, with rigid quality controls in place. ​​​​​​​All stocked R21 and R31 regulators are supplied with 1/4” NPT Female inlet and outlet fittings. Calgaz can supply connectors to fit British Standard (BS), DIN and CGA cylinders. For more information or requests regarding other regulators for HPC applications please contact us.