The Bray MCU Ball Valve Media Containment Unit is a secondary stem-sealing accessory compatible with multiple ball valve series. It features an investment-cast stainless steel body, a size range of 1/4" to 10", and an API 607 fire-safe design. In the event of primary seal failure, it reduces the risk of media leakage. Its side port supports fugitive emissions monitoring, leak detection, and on-site emergency repair through sealant injection, making it suitable for high-cycle, high- and low-temperature, steam, and corrosive media applications.
Media Containment Unit ball valve
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Bray MCU Ball Valve Media Containment Unit (API 607 Fire-Safe Design)
A ball valve media containment unit that provides secondary stem sealing and supports leak monitoring.
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Specifications
- Accessory Type
- Ball Valve Media Containment Unit
- Size Range
- 1/4" to 10" (6.35mm to 254mm)
- Body Material
- Investment-Cast Stainless Steel
- Compatible Valve Series
- Triad Series, 7000/8000 Series, S7500/S7700 Series, F15/F30 Series, RF15/RF30 Series, S85 Series
- Fire-Safe Design Certification
- API 607
Application scenarios
Stem fugitive emission monitoring in industrial process pipelines
Suitable for industrial process pipelines equipped with compatible series ball valves. When the primary seal fails, the unit provides secondary sealing and enables fugitive emission monitoring and leak detection through the side port for emission control and leak management.
Ball valve seal protection under high-cycle, high- and low-temperature, and steam service conditions
Suitable for compatible series ball valves operating under high-cycle, high-temperature, low-temperature, and steam service conditions. When the primary seal fails, the unit reduces the risk of media leakage from the stem area through secondary sealing and supports seal protection in demanding industrial applications.
Ball valve stem leak prevention and monitoring in corrosive media pipelines
Suitable for the stem sealing areas of compatible series ball valves used to convey or process corrosive media. Constructed from corrosion-resistant stainless steel, the unit provides secondary sealing when the primary seal fails and supports leak monitoring and response through the side port.
On-site emergency repair of in-service ball valve leaks
Suitable for on-site response after a primary seal leak occurs in a compatible series ball valve. The unit can be retrofitted through on-site installation, with the side port serving as an emergency repair connection and allowing sealant injection through a check valve to provide supplemental sealing and reduce unplanned maintenance.
Selection points
API 607 Fire-Safe Design
This MCU features an API 607 fire-safe design.
Secondary Sealing After Primary Seal Failure
If the primary seal fails, the MCU's secondary seal prevents leakage.
Side Port Monitoring and Emergency Sealant Injection
The MCU side port can be used for fugitive emissions monitoring, leak detection, fugitive emissions diversion, and positive-pressure sealing. Sealant can also be injected through a buttonhead check valve for emergency repair.
Factory Pre-Installation and Field Retrofit for Compatible Series
This MCU is suitable for Triad, 7000/8000, S7500/S7700, F15/F30, RF15/RF30, and S85 Series ball valves in sizes from 1/4" to 10". It can be factory pre-installed or retrofitted in the field.
Corrosion-Resistant Investment-Cast Stainless Steel Construction
This MCU is made of corrosion-resistant investment-cast stainless steel for demanding environments.
Installation & maintenance notes
Verify Compatible Valve Series and Size Range
When pre-installing or retrofitting an MCU in the field, verify that the ball valve belongs to the Triad, 7000/8000, S7500/S7700, F15/F30, RF15/RF30, or S85 Series and that the MCU size is within the 1/4 in. to 10 in. range.
Configure the MCU Side Port for the Intended Application
Configure the MCU side port according to the application during installation. The port can be used for fugitive emissions monitoring, leak detection, fugitive emissions diversion, positive-pressure sealing, or sealant injection through a buttonhead check valve.
FAQ
How does the MCU provide sealing performance under extreme operating conditions?
The system uses corrosion-resistant stainless steel to provide high durability and long-term sealing performance, while maintaining reliable sealing in high-cycle, cryogenic, high-temperature, and steam environments.
How does the MCU secondary seal prevent leakage if the primary seal fails?
The MCU incorporates a secondary seal to prevent leakage, ensuring containment capability remains available if the primary seal fails. Specific implementation details depend on the installed model.
What are the uses of the MCU side port?
The side port can be used for fugitive emissions monitoring, leak detection, fugitive emissions transfer, positive-pressure sealing, and injection of sealant for emergency repair systems.
What is the MCU size range and which valve series are commonly compatible?
The size range is 1/4" to 10" (6.35mm to 254mm), and it can be used with Triad, 7000/8000, S7500/S7700, F15/F30, RF15/RF30, and S85 series valves.
What are the MCU installation methods and key maintenance considerations?
The MCU can be factory-installed on several valve series or retrofitted in the field. Planned leak detection and maintenance should be prioritized to reduce unplanned LDAR-related maintenance events and improve production efficiency. Specific configurations must be confirmed based on the actual model and application conditions.