The Queen MT40S is a 1½" BSPT 2/2 way normally closed bronze steam solenoid valve designed for reliable control of steam, hot oils, water, air and compatible gases. Featuring a pressure-assisted piston design with a large 43 mm orifice, the MT40S delivers exceptional flow capacity for industrial steam distribution, boiler plant and large process heating systems. Its robust BC6 bronze body, stainless steel internal components and PTFE sealing provide dependable 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: 1½" 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: 43 mm
Kv flow factor: 614.9 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:
12V DC
24V AC
24V DC
110V AC
230V AC
Applications
Industrial steam distribution
Boiler houses and energy centres
Large process heating systems
Chemical and pharmaceutical processing
Food and beverage manufacturing
Industrial laundries and sterilisation systems
Hot oil circulation systems
General industrial process automation
Manufacturing quality
Manufactured using a heavy-duty BC6 bronze body with precision-machined stainless steel internal components, the Queen MT40S has been engineered for reliable long-term operation in demanding industrial environments. Its pressure-assisted piston design provides rapid response and excellent flow performance, making it particularly suitable for larger steam distribution systems and industrial heating applications. The PTFE sealing system delivers outstanding resistance to high temperatures and wear, ensuring dependable operation and extended service life.
Ordering information
Simply select the required voltage and thread type before adding the valve to your basket.
