M5–1/8" Brass 3/2 Way Solenoid Valve 0–8 Bar Normally Closed
The Sunwell BT01 and BT03 Series are compact direct acting 3/2 way normally closed brass solenoid valves designed for controlling air, water, vacuum, gases, light oils and other low viscosity fluids. Available with M5 or 1/8" BSP threaded ports, these miniature valves provide reliable switching with no minimum operating pressure, making them ideal for compact pneumatic systems, vacuum control and OEM equipment.
Manufactured with a forged brass body and stainless steel internal components, the BT Series is available with NBR, EPDM, FKM or FFKM (Kalrez®) seals and a choice of compact 6 Watt or larger 6.8 Watt Nass Magnet coils. Optional ATEX Ex m coils are available for hazardous area installations.
Features
✓ Direct acting 3/2 way normally closed operation
✓ No minimum operating pressure
✓ M5 & 1/8" BSP ports
✓ Forged brass body
✓ Stainless steel internal components
✓ NBR, EPDM, FKM or FFKM seal options
✓ Vacuum capable to 10⁻⁴ Torr
✓ IP65 connector included
✓ 100% continuous duty Nass Magnet coils
✓ Optional ATEX Ex m certified coil
✓ BSP, NPT or Rc thread options
Valve Function & Operation
Function: 3/2 Way Normally Closed
Operation: Direct Acting
Ports & Flow Performance
Port Sizes: M5 (BT01) and 1/8" BSP (BT03)
Optional NPT or Rc threads
Working Pressure: 0–8 Bar (depending on orifice and coil)
Vacuum: 10⁻⁴ Torr
Orifice Sizes
1.0mm
1.3mm
1.6mm
2.0mm
2.5mm
Kv Flow Factor: 0.42 to 2.57 L/min
Construction & Materials
Body: Forged Brass
Internal Components: Stainless Steel
Seals: NBR (Standard)
EPDM
FKM
FFKM (Kalrez®)
Suitable Media
Compressed air
Water
Vacuum
Neutral gases
Light oils
Low viscosity fluids (maximum 50 cSt)
Temperature Range
Ambient Temperature: -15°C to +50°C
Media Temperature
NBR: -5°C to +80°C
EPDM: -10°C to +145°C
FKM: -10°C to +145°C
FFKM (Kalrez®): -20°C to +80°C
Coil & Electrical Specification
Coil Option 1
Nass Magnet System 8/22
6 Watt DC / 6.9 VA AC
DIN 43650B
Class F Insulation
100% Continuous Duty
Coil Option 2
Nass Magnet System 8/30
6.8 Watt DC / 8 VA AC
DIN 43650A
Class H Insulation
100% Continuous Duty
Available Voltages
12 & 24V DC
24, 48, 110 & 230V AC (50/60Hz)
Protection: IP65 with connector included
ATEX / IECEx Coil Option
Optional Nass Magnet System 8/22 explosion-protected solenoid operator available for hazardous area applications.
✓ Ex mb IIC T4 Gb
✓ Ex mb tb IIIC T130°C Db
✓ Suitable for Zone 1 gas and Zone 21 dust hazardous areas
✓ ATEX Category 2G / 2D
✓ Gas Group IIC / Dust Group IIIC
✓ Protection rating: IP65
✓ 100% continuous duty
✓ Ambient temperature: -20°C to +50°C single valve
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
