3/4 Inch Bronze Steam Solenoid Valve – Queen MK20S
The Queen MK20S is a 3/4" BSPT 2/2 way normally closed bronze steam solenoid valve designed for reliable control of steam, hot oils, water, air and compatible gases. Featuring an assisted-lift (kick pilot) operating principle, the valve opens from zero pressure differential while providing dependable operation up to 10 Bar. Its larger 19 mm orifice delivers increased flow capacity, making it ideal for industrial steam distribution, heating systems, process equipment and demanding high-temperature fluid control applications.
Valve function & operation
Function: 2/2 way normally closed
Operating principle: Assisted lift (kick pilot)
Minimum operating pressure: 0 Bar
Port size: 3/4" BSPT
Optional threads: NPT or Rc
Pressure & flow
Steam: 0 to 10 Bar
Air & water: 0 to 8 Bar
Oil: 0 to 7 Bar
Orifice: 19 mm
Kv flow factor: 70.07 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
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
✓ Vacuum (to 10 Torr)
✓ Inert gases
✓ Hot and light oils up to 50 cSt
✓ Fluids compatible with the valve materials
Coil & electrical
Standard coil: M17 19 Watt DC, 35 VA AC (26 VA holding)
Class H (180°C)
100% continuous duty rated
DIN 43650A connector
IP65 protection
Voltage options:
24V DC
24V AC (with rectifier connector)
110V AC
230V AC
Applications
Industrial steam distribution
Heating and hot oil systems
Steam boilers and plant equipment
Process heating systems
Autoclaves and sterilisation equipment
Food processing machinery
Chemical processing
General industrial fluid control
Manufacturing quality
Manufactured using a high-quality BC6 bronze body with stainless steel internal components, the Queen MK20S has been designed for dependable long-term operation in demanding industrial environments. Its assisted-lift operating principle provides reliable switching from zero pressure differential, making it particularly suitable for low-pressure steam, gravity-fed systems and vacuum applications where conventional servo-assisted valves cannot operate. The PTFE sealing system offers excellent resistance to high temperatures, wear and aggressive operating conditions, ensuring long service life in demanding industrial applications.
Ordering information
Simply select the required voltage and thread type before adding the valve to your basket.
Pressure:
0.1 Bar (100 mBar), 0.2 Bar (200 mBar), 0.3 Bar (300 mBar), 0.4 Bar (400 mBar), 0.5 Bar (500 mBar), 0.6 Bar (600 mbar), 0.7 Bar (700 mBar), 0.8 Bar (800 mBar), 1 Bar, 1.2 Bar, 1.3 Bar, 1.4 Bar, 1.5 Bar, 1.6 Bar, 2 Bar, 2.5 Bar, 3 Bar, 3.5 Bar, 4 Bar, 4.5 Bar, 5 Bar, 5.5 Bar, 6 Bar, 6.5 Bar, 7 Bar, 7.5 Bar, 8 Bar, 8.5 Bar, 9 Bar, 10 Bar
