The ROSS Pneumatrol T25 Series is a versatile NAMUR-mounted pilot-operated pneumatic solenoid valve designed for direct installation onto quarter-turn pneumatic actuators. Available in 3/2, 5/2 and 5/3 configurations, the T25 provides flexible pneumatic control for both spring-return and double-acting actuator applications across process automation, oil & gas, chemical processing and industrial control systems. [pneumatrol.com], [pneumatrol.com]
Designed to mount directly onto actuators using industry-standard NAMUR fixing dimensions, the T25 combines compact installation, high reliability and simplified maintenance. Internal or external pilot options are available, together with single-solenoid spring-return and dual-solenoid stay-put configurations. Compatible with safe area and hazardous area operators through the interchangeable CNOMO interface, the T25 offers a robust solution for demanding industrial environments. [pneumatrol.com], [pneumatrol.com]
NAMUR Mounted 3oo2 & 5oo2 Redundant Solenoid Valve System
Product Overview
The ROSS Pneumatrol redundant solenoid valve system provides a compact and highly reliable actuator control solution for safety-critical applications requiring enhanced redundancy and operational security.
Designed for direct NAMUR mounting onto quarter-turn pneumatic actuators, the system supports 3oo2 (Three Out Of Two) and 5oo2 (Five Out Of Two) voting architectures, helping improve fault tolerance while maintaining process availability.
Manufacturer: ROSS Pneumatrol
Connection Size: ¼" BSP / NPT
Mounting Style: NAMUR Mounted
Voting Architectures: 3oo2 and 5oo2
Pilot Options: Internal or External Pilot
Actuation Options: Single or Dual Solenoid
Key Features
- 3oo2 redundant voting architecture
- 5oo2 redundant voting architecture
- Direct NAMUR actuator mounting
- Internal or external pilot operation
- Single solenoid configuration available
- Dual solenoid configuration available
- ¼" BSP or NPT port connections
- Compact valve automation package
- Reduced installation pipework
- Designed for safety-critical applications
- Improved fault tolerance and system availability
Understanding 3oo2 & 5oo2 Architectures
3oo2 Voting System
The 3oo2 architecture uses three independent channels to improve reliability and reduce the impact of single channel failures.
Benefits include:
- Enhanced fault tolerance
- Reduced risk of unnecessary shutdowns
- Improved system reliability
- Increased process availability
5oo2 Voting System
The 5oo2 configuration provides additional redundancy for applications demanding the highest levels of reliability and operational continuity.
Benefits include:
- Greater redundancy
- Improved availability
- Reduced risk of process interruptions
- Suitable for critical process environments
Applications
The system is ideally suited for:
- Emergency Shutdown (ESD) systems
- Safety Instrumented Systems (SIS)
- Safety Instrumented Functions (SIF)
- Automated process valve control
- Critical isolation valves
- Pipeline shutdown systems
- Refinery automation systems
- Petrochemical process control
- Oil & gas production facilities
- Hazardous area valve automation
Product Benefits
Enhanced Functional Safety
The redundant architecture improves operational integrity and helps reduce the impact of individual component failures.
Increased Plant Availability
Designed to minimise spurious trip events while maintaining safety system performance.
Simplified Valve Automation
The NAMUR mounting arrangement provides direct installation onto pneumatic actuators, reducing installation complexity and potential leak paths.
Flexible Configuration
Internal or external pilot operation and single or dual solenoid options allow engineers to select the most suitable arrangement for their specific application.
Reduced Maintenance Requirements
A compact and integrated design simplifies maintenance activities while supporting long-term reliability.
Typical Industries Served
ROSS Pneumatrol redundant control systems are widely used across:
- Oil & Gas
- Petrochemical Processing
- Chemical Manufacturing
- Offshore & Marine
- LNG Facilities
- Hydrogen Production
- Energy & Utilities
- Power Generation
- Process Industry
Why Choose ROSS Pneumatrol?
ROSS Pneumatrol has extensive experience in process safety, valve automation and hazardous area control solutions. Our redundant solenoid systems are engineered to support modern functional safety strategies while helping operators maximise plant uptime and operational reliability.
As a UK manufacturer specialising in pneumatic and electro-pneumatic control technologies, ROSS Pneumatrol provides industry-proven solutions trusted throughout safety-critical industries worldwide.
Important Notes
- Voting architecture should be selected as part of the overall functional safety assessment.
- Internal or external pilot configuration should be matched to application requirements.
- Solenoid configuration should be determined according to control philosophy and safety objectives.
- Installation should comply with applicable process safety and engineering standards.
- Final system performance depends on the complete actuator, valve and control package design.
Download and Further Information
Download the datasheet here:
Download 3oo2 & 5oo2 NAMUR Mounted Redundant Solenoid System Datasheet