SIEMENS QBM81-5 differential pressure switch provides accurate low-pressure air system control for HVAC with a 50–500 Pa measurement range and 7.5 kPa maximum pressure. The device supports AC 24–250 V / 24 V DC switching voltage and -20 to 85 C ambient temperature, review technical specifications, wiring and installation procedures.

SIEMENS VVF43.100-160 control valve ensures precise flow regulation for HVAC and steam systems with DN100 nominal diameter and 160 m3/h kvs value. Built for PN16 pressure and -20 C to 220 C medium temperature, review technical specifications, replacement and upgrades paths.

SIEMENS 3RV1021-4AA10 motor protection circuit breaker provides reliable overcurrent and short-circuit protection for motors up to 7.5 kW in industrial applications. The breaker features 220 to 690 V AC operation and 11–16 A adjustable trip range with DIN rail mounting, review the essential wiring and installation guide and technical specifications documents.

SIEMENS 3RV6011-1HA15 motor protection circuit breaker provides reliable 8 A rated overcurrent and short-circuit protection with Class 10 trip characteristics for industrial applications. The unit features 5.5–8 A A-release and a transverse auxiliary switch with 1 NO and 1 NC contact, locate troubleshooting and compatibility information and replacement and upgrades guides.