The Queen MT50S is a 2" BSPT 2/2 way normally closed bronze steam solenoid valve designed for reliable control of high-volume steam, hot oils, water, air and compatible gases. Featuring a pressure-assisted piston design with a large 53 mm orifice, the MT50S delivers outstanding flow capacity for main steam distribution, boiler houses and large industrial process heating systems. Its heavy-duty BC6 bronze body, stainless steel internal components and PTFE sealing provide dependable long-term performance in demanding high-temperature applications.
Valve function & operation
Function: 2/2 way normally closed
Operating principle: Pressure-assisted piston
Minimum operating pressure: 0.3 Bar differential
Port size: 2" BSPT
Optional threads: NPT or Rc
Pressure & flow
Steam: 0.3 to 10 Bar
Air & water: 0.3 to 8 Bar
Oil: 0.3 to 7 Bar
Orifice: 53 mm
Kv flow factor: 686.4 L/min
(Based on water with 1 Bar pressure drop.)
Maximum media temperature: +180°C
Ambient temperature: -20°C to +50°C
Maximum media viscosity: 50 cSt
Opening / closing time: 200 mSec maximum
Mounting position: Coil upright (±15° from vertical)
Construction & materials
Body: BC6 bronze
Piston: Stainless steel and bronze with PTFE sealing
Internals: Stainless steel
Tube: 304 stainless steel
Seals: PTFE with graphite impregnated PTFE gaskets
Media compatibility
✓ Steam
✓ Hot and cold water
✓ Compressed air
✓ Inert gases
✓ Light oils up to 50 cSt
✓ Fluids compatible with the valve materials
Coil & electrical
Standard coil: M17 21 Watt DC, 35 VA AC (26 VA holding)
Class N (200°C)
DIN 43650A connector
IP65 protection
Voltage options:
24V AC
24V DC
110V AC
230V AC
Applications
Main steam distribution systems
Boiler houses and central energy plants
Large industrial heating systems
Process heating and manufacturing plant
Chemical and pharmaceutical processing
Food and beverage production
Industrial laundries and sterilisation equipment
Heavy-duty industrial process automation
Manufacturing quality
Manufactured using a heavy-duty BC6 bronze body with precision-machined stainless steel internal components, the Queen MT50S has been engineered for reliable operation in demanding industrial environments. Its pressure-assisted piston design combines rapid response with exceptionally high flow performance, making it ideally suited to large steam mains, process heating installations and central plant services. The PTFE sealing system provides excellent resistance to elevated temperatures, wear and aggressive operating conditions, ensuring dependable long-term performance.
Ordering information
Simply select the required voltage and thread type before adding the valve to your basket.
