The BU13 is Spectron's modular pressure control panel for industrial gas calibration applications, part of the Spectrotec product line. It reduces high-pressure cylinder gas — up to 300 bar — to precisely regulated outlet pressures of 10 to 35 bar for calibrating pressure transmitters, gauges, and switches in laboratory and production environments. The compensated main valve design maintains stable outlet pressure even as cylinder pressure decays during use.

What cylinder configurations are available?

The BU13 uses a modular architecture that scales from 1×1 (one cylinder, one outlet) through 1×2, 1×3, 2×1, 2×2, to 2×3 (two independent cylinder connections, three regulated outlets each). Each configuration includes process gas and purge valves on the inlet side, shut-off valves with open/closed position indicators on the outlet side, and integrated relief valves for overpressure protection. An automatic change-over variant (BU13&15-2U) switches between two cylinder banks without interrupting gas flow — critical for continuous calibration operations. Weights range from 6.5 kg (1×1) to 12.5 kg (2×3).

What gases and safety standards does it support?

The standard BU13 handles non-corrosive industrial gases including nitrogen, argon, helium, and compressed air. The BU13 AC variant, with a stainless steel body, is approved for acetylene per DIN-EN-ISO 14114 and DIN-EN-ISO 15615. All variants are approved for oxygen service (max 30 bar outlet). Safety pressure gauges conform to DIN EN ISO 5171. Sintered bronze filters on process gas valves and nickel filters in the regulator protect downstream instrumentation from particulate contamination. The leak rate of less than 10⁻⁴ mbar l/s He ensures calibration-grade gas integrity.