The SUS6, SUS8 and SUS10 are compact 2/2 way normally closed direct-acting stainless steel steam solenoid valves designed for steam, hot water, air, vacuum, light oils and compatible industrial fluids.
Unlike pressure-assisted steam valves, the SUS6–10 Series operates from 0 Bar differential pressure, making it particularly useful for closed-loop systems, low-pressure steam equipment, vacuum applications and installations where sufficient differential pressure cannot always be guaranteed.
Manufactured from 316 CF8M stainless steel with stainless steel internals and PTFE seals as standard, the range handles media temperatures up to +185°C. Port sizes of 1/8", 1/4" and 3/8" are available, with operating pressures up to 10 Bar depending on valve size.
Valve Function & Operation
Function: 2/2 way normally closed
Operation: Direct acting
Minimum differential pressure: 0 Bar
The SUS6–10 Series is direct acting, meaning the solenoid operator mechanically controls the valve without requiring media pressure to assist opening.
This allows reliable operation from zero differential pressure and makes the series particularly useful for low-pressure, gravity-fed and vacuum applications where a conventional pressure-assisted steam valve may not operate correctly.
Ports & Connections
SUS6 → 1/8"
SUS8 → 1/4"
SUS10 → 3/8"
Thread options:
✓ BSPP
✓ NPT
✓ Rc
The manufacturer data specifically lists NPT and BSPP as thread options.
Pressure & Performance
SUS6 – 1/8"
Orifice: 2.5mm
Pressure: 0–7 Bar
Water flow: 3.28 L/min
SUS8 – 1/4"
Orifice: 2.5mm
Pressure: 0–7 Bar
Water flow: 3.28 L/min
SUS10 – 3/8"
Orifice: 4.0mm
Pressure: 0–10 Bar
Water flow: 8.29 L/min
Flow figures are based on water with a 1 Bar pressure differential. The manufacturer's table confirms the individual orifice, flow and pressure ratings for all three models.
Construction & Materials
Body: 316 CF8M stainless steel
Tube and internal components: Stainless steel
Standard seals and gaskets: PTFE
Optional seals:
✓ NBR
✓ EPDM
✓ FKM
✓ Silicone
The 316 stainless steel construction provides improved corrosion resistance compared with conventional brass steam valves and allows the SUS Series to be considered for compatible process fluids as well as steam and hot water.
Media Compatibility
Suitable media include:
✓ Steam
✓ Hot and cold water
✓ Compressed air
✓ Vacuum
✓ Light oils
✓ Compatible gases
✓ Compatible process fluids
Maximum media viscosity: 50 cSt
Compatibility must be checked against the 316 stainless steel construction and selected seal material, particularly for chemically aggressive fluids.
Temperature
Maximum media temperature with PTFE seals: +185°C
Ambient temperature: -5°C to +60°C
Alternative seal materials have lower temperature limits, so PTFE should be selected for the highest-temperature steam applications.
Coil & Electrical
Standard coil: Class H insulation – 180°C
Duty cycle: 100% continuous duty
Protection: IP65
Connection: DIN 43650A
Voltage Options
24V DC
110V AC
230V AC
One point I'd change from the existing page: the supplied datasheet only documents 24VDC, 110VAC and 230VAC in its electrical table. It doesn't support the existing 12VDC claim, so I would leave 12VDC off unless you know you physically supply/test that voltage.
Installation
Recommended mounting position: coil upright
This helps ensure reliable armature operation and is the manufacturer's advised installation orientation.
Typical Applications
Steam control systems
Compact steam equipment
Hot water circuits
Industrial heating equipment
HVAC systems
Vacuum equipment
Sterilisation equipment
Light oil control
Laboratory and test equipment
OEM machinery
Chemical and process equipment
General industrial automation
Why Choose the SUS6–10 Series?
The main advantage of the SUS6–10 over larger pressure-assisted steam solenoid valves is its direct-acting, zero-differential-pressure operation.
This makes it particularly valuable where steam, hot water or process media pressure can fall close to zero, or where the outlet side of the valve may already be pressurised.
The combination of 316 stainless steel, PTFE sealing, +185°C media capability and zero-pressure operation provides a compact solution for demanding high-temperature applications where a conventional pilot-operated steam valve may not be suitable.
Pressure:
0.02 Bar (20 mBar), 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
