QSLM 2000

Dual inlet decompression unit with automatic change-over system.


It allows the use of two cylinders or packs of cylinder; when one source of pressure drops below the threshold value, the second gas supply automatically sets in.
Turning the lever, the side with priority supply will be set.

During first cylinder discharge, outlet pressure drops from maximum change-over pressure to the minimum;
turning the lever the outlet pressure rises to the maximum supplied by the second full cylinder.

Inlet pressure up to 220 bar (3190 psi) for standard version. Outlet pressure up to 15 bar (218 psi), is controlled by a diaphragm;
instead, greater outlet pressures are controlled by a piston.

The decompression unit is suitable for all industrial applications such as welding, cutting and laser systems.
The product complies with the directive 2014/68/EU (PED).


Technical data

CompatibilityCompressed air | Tecnhical gases and their mixtures
Max Inlet PressureStandard 220 bar
IN/OUT ConnectionIN: W 20x1/14” SX – M | W 21,7x1/14” – M (depending on the fluid) | OUT: G1/2”-M (QSLM 1200) | G1/4”-F (QSLM 2000)
Working Temperature-4+140 °F standard | From -76 up to +608 °F on request
CV (CEI EN 60534-2)0,74 US gal/min (QSLM 1200) | 0,08 US gal/min (QSLM 2000)
Outlet Pressure Range1,5 ÷ 15 | 20 ÷ 30 | 35 ÷ 50 (QSLM 1200) | 1,5 ÷ 15 (QSLM 2000)
Weight~44 lb (QSLM 1200) | ~17 lb (QSLM 2000)
Plug Leakage Class“A” class (UNI EN 12266-1)
CertificationsPED 2014/68/UE | MOCA 1935/2004
Internals and Body MaterialBrass | External frame in AISI304L
Seals MaterialEDPM | FPM | FVMQ | FFKM
AccesoriesPre-heaters | Bleeder micro-regulators | pressure switches | External acoustic alarm system
Spare Parts KitO-rings | assembled plugs | net filter | assembled diaphragms (if applicable)

Technical design