Heavy-duty aluminium alloy valve assemblies. Integral filters and water traps on filter regulators. Air flow control knob can be locked in position to prevent accidental adjustment of pressure. SA2FR, SA3FR, SA4FR/38 and SA5/RG/14 feature large gauges, dual marked in psi and bar. Individual compressed air outlets are fitted with shut-off valve. Filter regulators are suitable for direct mounting onto compressors or can be plumbed into airline runs.