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Shutoff Valve catalogue
Emergency Shut Off Valve (MBA series)
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Tokico MBA Series Emergency Shut-Off Valve
The Tokico MBA Series is an electrical signal-operated emergency shut-off valve using a CO₂ cartridge to power the cylinder actuator and close a ball valve.
- Catalogue connection sizes from 25 to 400 mm.
- CO₂-powered actuation without a plant compressed-air supply.
- Electrical triggering through suitable control equipment.
- Manual reset and horizontal or vertical piping installation.
Contact Seacom to confirm fluid compatibility, pressure, flange specification and control requirements.
Tokico MBA Series Emergency Shut-Off Valves
The Tokico MBA Series uses an electrical trip signal to release CO₂ from a cartridge into a cylinder actuator, closing a ball valve to isolate a pipeline. The cartridge supplies the mechanical energy for closure, without requiring a plant compressed-air supply.
Seacom Process Instruments Sdn Bhd helps customers review valve size, fluid compatibility, operating conditions and the required shutdown signal before specifying an assembly.
Key Features
- Electrical signal-operated emergency closure.
- CO₂ cartridge-powered cylinder actuator.
- Ball-valve construction with manual reset operation.
- Catalogue connection sizes from 25 to 400 mm.
- Horizontal or vertical piping installation, subject to the approved arrangement.
- Integration with external detection and control equipment through a suitable control panel.
How the MBA Valve Operates
An electrical signal operates the solenoid valve. CO₂ is then released into the actuator cylinder, moving the piston and closing the ball valve. The triggering signal can originate from an appropriately configured control panel connected to detection equipment.
The CO₂ cartridge powers the actuator; it does not eliminate the electrical requirements of the MBA solenoid, control panel or detectors. Specify the control supply and any backup power together with the shutdown system.
MBA, MBC and MBD: Signal Types
The existing product range includes the following operating principles. The detailed catalogue specifications below apply to MBA; confirm MBC and MBD specifications and supply options separately.
| Series | Trigger | Operating principle |
|---|---|---|
| MBA | Electrical signal | A solenoid releases CO₂ into the cylinder following a control signal, closing the ball valve. |
| MBC | Line-pressure signal | Pressure exceeding the set point initiates CO₂ release and valve closure. |
| MBD | Seismic signal | The seismic detection mechanism initiates CO₂ release and valve closure. |
MBA Catalogue Specifications
The following values are taken from the Tokico GS-M1020E-03 catalogue attached to this page. Confirm the latest approved specification for the selected assembly before ordering.
| Specification | Catalogue reference |
|---|---|
| Valve type | Ball valve with CO₂ cartridge-powered cylinder actuator |
| Listed fluids | City gas, natural gas, LP gas and petroleum; subject to material and operating-condition compatibility |
| Connection size range | 25 to 400 mm |
| Maximum working pressure | 0.99 MPa; higher-pressure applications require separate enquiry |
| Fluid temperature | −5 to 80°C |
| Ambient temperature | −20 to 40°C |
| Flange options | JIS 10K FF or RF; ANSI / JPI 150 RF |
| Body material | SCPH2 standard or SCS13 |
| Ball and seat | SCS13 ball; PTFE (Teflon) seat |
| Solenoid supply | 24 V DC ±10%, or 100 V AC ±10%, 50/60 Hz |
| Solenoid power consumption | 24 V DC: 30 W; 100 V AC: 35 VA |
| Operating signal | One-shot signal, 0.5 to 3 seconds on-time |
| Reset | Manual handle |
The catalogue's signal on-time is an electrical input requirement, not a specified valve-closing time. Confirm closure time for the actual valve, fluid and operating conditions. For hazardous-area installations, obtain the applicable certification for the complete supplied assembly.
Connection Sizes
| Nominal size | Inch designation | Catalogue diameter / capacity code |
|---|---|---|
| 25 mm | 1 inch | B8 |
| 40 mm | 1½ inch | 04 |
| 50 mm | 2 inch | 05 |
| 80 mm | 3 inch | 08 |
| 100 mm | 4 inch | 10 |
| 150 mm | 6 inch | 15 |
| 200 mm | 8 inch | 20 |
| 250 mm | 10 inch | 25 |
| 300 mm | 12 inch | 30 |
| 350 mm | 14 inch | 35 |
| 400 mm | 16 inch | 40 |
Connection size and valve capacity are separate fields in the full order code. Provide the existing nameplate or required configuration so Seacom can check the complete model designation.
Control and Installation Requirements
- Fluid and pressure: provide the medium, normal and maximum pressure, fluid temperature and required leakage performance.
- Pipe connection: confirm nominal size, flange standard, facing, installation orientation and available space.
- Trip signal: identify the detector or control panel, signal arrangement, supply voltage and any backup-power requirement.
- Valve feedback: specify whether open/closed indication or optional limit switches are required.
- Maintenance: include access for inspection, cartridge servicing and reset in the installation plan. Follow the manufacturer's commissioning and maintenance instructions.
The MBA is specified for emergency isolation. Routine flow-control duty, automatic restart and retrofit to an existing valve require separate confirmation.
Catalogue and Enquiries
For model selection, send Seacom your fluid details, pipe size, pressure, temperature, flange specification and intended trip signal. For replacement equipment, include photographs of the valve, actuator and complete nameplate.
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