MSB1/MSB1F is a motorized 2-port ball valve for steam and water. Standard bore (MSB1) and full bore (MSB1F) types are available, with Rc3/8 to Rc2 ports. The steam temperature is up to 164 °C. The body is bronze or stainless steel and the valve seat is reinforced PTFE.


| Working Fluid | Steam, water |
| Valve Structure | Motorized ball valve (2-port) |
| Working Pressure | 0 to 0.6 MPa (0 to 0.5 MPa for standard bore Rc2 and full bore Rc1 1/2) |
| Proof Pressure | 2.0 MPa (water pressure) |
| Fluid Temperature | 0 to 164 °C (no freezing) (0 to 158 °C for standard bore Rc2 and full bore Rc1 1/2) |
| Ambient Temperature | -10 to 50 °C |
| Ambient Humidity | 95% or less |
| Degree of Protection | IPX3 (rainproof, standard and option T only) |
| Pressurization Direction | Arbitrary |
| Mounting Orientation | From vertical direction with the actuator on the top to horizontal direction |
| Port Size / Orifice / Cv (MSB1) | Rc3/8: 10 mm, Cv 10 | Rc1/2: 10 mm, Cv 6 | Rc3/4: 15 mm, Cv 16 | Rc1: 20 mm, Cv 29 | Rc1 1/4: 25 mm, Cv 50 | Rc1 1/2: 32 mm, Cv 98 | Rc2: 40 mm, Cv 125 |
| Port Size / Orifice / Cv (MSB1F) | Rc1/2: 15 mm, Cv 23 | Rc3/4: 20 mm, Cv 51 | Rc1: 25 mm, Cv 66 | Rc1 1/4: 32 mm, Cv 114 | Rc1 1/2: 40 mm, Cv 176 |
| Response Time | 50 Hz: 10 s (MSB1-10 to 25, MSB1F-15/20), 13 s (MSB1-32 to 50, MSB1F-25 to 40) / 60 Hz: 8 s (MSB1-10 to 25, MSB1F-15/20), 11 s (MSB1-32 to 50, MSB1F-25 to 40) |
| Frequency | 1 time/min. or less |
| Body / Seat Material | Bronze / reinforced PTFE (H), stainless steel / reinforced PTFE (W, standard bore only) |
| Rated Voltage | 100 VAC / 200 VAC (50/60 Hz) |
| Apparent Power | 4.9/5.9 VA (100 VAC), 5.4/6.2 VA (200 VAC) (MSB1-10 to 25, MSB1F-15/20) / 13/15 VA (MSB1-32 to 50, MSB1F-25 to 40) |
| Power Consumption | 7 W (MSB1-10 to 25, MSB1F-15/20) / 15 W (MSB1-32 to 50, MSB1F-25 to 40) |
| Weight | MSB1 standard bore: bronze body 1.3 to 3.8 kg, stainless steel body 1.5 to 4.0 kg (Rc3/8 and Rc1/2 1.3/1.5, Rc3/4 1.4/1.6, Rc1 1.6/1.8, Rc1 1/4 2.6/2.8, Rc1 1/2 3.1/3.3, Rc2 3.8/4.0) / MSB1F full bore: 1.4, 1.6, 2.6, 3.1, 3.8 kg (Rc1/2, Rc3/4, Rc1, Rc1 1/4, Rc1 1/2) |