The Queen MTFS Series is a flanged 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 heavy-duty one-piece BC6 bronze body, the MTFS range delivers high flow performance for industrial steam distribution, boiler houses and process heating systems. Available in DN32, DN40 and DN50 PN16 flanges with optional ANSI 150 lb or JIS 10K drilling, these valves provide dependable long-term operation in demanding industrial applications.
Valve function & operation
Function: 2/2 way normally closed
Operating principle: Pressure-assisted piston
Minimum operating pressure: 0.3 Bar differential
Flange sizes:
DN32, DN40 and DN50 PN16
Optional flange standards:
ANSI 150 lb
JIS 10K
Pressure & flow
Steam: 0.3 to 10 Bar
Air & water: 0.3 to 8 Bar
Oil: 0.3 to 7 Bar
Orifice sizes:
DN32 – 33 mm
DN40 – 43 mm
DN50 – 53 mm
Kv flow factor:
DN32 – 314.6 L/min
DN40 – 429 L/min
DN50 – 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 and flanges: One-piece BC6 bronze casting
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 19 Watt DC, 35 VA AC (26 VA holding)
Class N (200°C)
DIN 43650A connector
IP65 protection
Voltage options:
24V DC
24V AC
110V AC
230V AC
Applications
Steam distribution pipework
Boiler houses and energy centres
Industrial process heating
Chemical and pharmaceutical processing
Food and beverage manufacturing
Industrial laundries
Steam sterilisation systems
Large industrial heating installations
General industrial process automation
Manufacturing quality
Manufactured using a heavy-duty one-piece BC6 bronze casting with precision-machined stainless steel internal components, the Queen MTFS Series has been engineered for reliable operation in demanding industrial environments. The pressure-assisted piston design provides rapid response together with excellent flow capacity, making these valves ideal for larger steam distribution systems, process heating and central plant installations. PTFE sealing delivers excellent resistance to elevated temperatures, wear and aggressive operating conditions, ensuring dependable long-term service.
Ordering information
Simply select the required flange size, voltage and flange standard before adding the valve to your basket. Standard PN16 flanges are available with optional ANSI 150 lb and JIS 10K drilling to suit your installation.
