GASB is a ball valve for automatic shut off that closes reliably with spring force and a fail-safe mechanism. It is NC type (open when energized) for city gas, natural gas and LPG, with a working pressure up to 1.0 MPa. The body is ductile cast iron and the ball is stainless steel, in 50A, 80A and 100A (JIS flange).
| Working Fluid | City gas / natural gas / LPG |
| Valve Structure | Spring return fail-safe ball valve, NC (open when energized) |
| Working Pressure | 0 to 1.0 MPa |
| Flow Rate (natural gas specific gravity 0.65, ΔP = 0.25 kPa, m³/h (ANR)) | GASB-2: 680 / GASB-3: 1780 / GASB-4: 1270 |
| Cv | GASB-2: 460 / GASB-3: 1200 / GASB-4: 860 |
| Flow Rate Conversion Coefficient (multiply flow rate in table) | Natural gas (13A) 1.0, city gas (6B/6C) 1.09, propane 0.63, butane 0.57, butane-air (6A) 0.72 |
| Rated Voltage | 100 VAC ±10%, 200 VAC ±10% (common to 50 and 60 Hz) |
| Apparent Power | When valve is opening 460 VA / when valve is held open 44 VA |
| Power Consumption | When valve is opening 150 W / when valve is held open 15 W |
| Ambient Temperature | -10 to 60 °C (no freezing) |
| Opening Time | 20 s or less (at 20 °C, rated voltage), 60 s or less (at -10 °C, rated voltage) |
| Closing Time | 2 s or less (at 20 °C) |
| Frequency | 1 cycle/min. or less |
| Mounting Orientation | Vertical with actuator up / horizontal (when horizontal, SHUT side of valve open/close indicator should be on top when actuator is viewed from front) |
| Connection / Port Size | Flange (JIS 10K RF) / GASB-2: 50A, GASB-3: 80A, GASB-4: 100A (reduced port) |
| Weight | GASB-2: 46 kg / GASB-3: 56 kg / GASB-4: 59 kg |
| Proof Pressure | 1.5 MPa |
| Body / Ball Material | Ductile cast iron / stainless steel |
| Open/Close Confirmation | Valve open/close confirmation switch (limit switch contact capacity 250 VAC, 10 A) |