Namur valves are standardized pneumatic valves designed according to the Normenarbeitsgemeinschaft für Mess- und Regelungstechnik (NAMUR) standards. These valves feature a specific mounting interface pattern that allows direct attachment of pneumatic actuators, sensors, and other accessories without additional mounting brackets.

Primary Function

Namur valves provide standardized interface solutions for pneumatic systems, enabling quick and easy installation of actuators, positioners, and feedback devices. They ensure compatibility between different manufacturers' components and simplify system integration.

Working Principle

These valves operate through:

• Standardized mounting interface according to NAMUR standards
• Direct attachment to pneumatic actuators
• Integrated port connections for air supply and exhaust
• Compatible with various actuation methods
• Plug-and-play installation with compliant accessories

Key Standards

NAMUR Mounting Interface

Standardized bolt pattern and port locations

Port Size Standards

Consistent port dimensions across manufacturers

Electrical Connections

Standardized connector types and pin configurations

Valve Types

Solenoid Operated Namur Valves

Electrically controlled valves with NAMUR interface

Pilot Operated Namur Valves

Air-piloted valves with standardized mounting

Manual Reset Namur Valves

Safety valves with manual operation capability

Multi-Port Namur Valves

Valves with multiple functions in single unit

Mounting Specifications

Bolt Pattern

Standardized 4-bolt or 8-bolt mounting patterns

Port Locations

Consistent port positioning for easy installation

Interface Dimensions

Precise dimensional standards for compatibility

Actuation Methods

• Single solenoid operation
• Double solenoid control
• Pilot air operation
• Manual override options
• Spring return versions
• Double air pilot versions

Key Components

• Standardized mounting interface
• Precision spool or poppet assembly
• NAMUR-compliant port connections
• Integrated solenoid coils
• Standard mounting hardware
• Compatible sealing system

Common Applications

• Pneumatic actuator control
• Process automation systems
• Valve position control
• Manufacturing equipment
• Packaging machinery
• Material handling systems
• Chemical processing plants
• Food and beverage industry

Materials of Construction

• Aluminum valve bodies
• Brass internal components
• Stainless steel mounting hardware
• NBR, Viton, or EPDM seals
• Corrosion-resistant coatings
• High-temperature capable materials

Advantages

• Standardized compatibility
• Easy installation and maintenance
• Reduced inventory requirements
• Multi-vendor compatibility
• Simplified system design
• Reduced installation time
• Improved reliability

Selection Considerations

• Actuator compatibility
• Flow rate requirements
• Operating pressure range
• Electrical specifications
• Environmental conditions
• Mounting space availability
• Accessory requirements

Installation Guidelines

• Verify NAMUR compatibility
• Proper alignment during mounting
• Correct torque specifications
• Proper air connection procedures
• Electrical wiring compliance
• Leak testing after installation

Maintenance Requirements

• Regular seal inspection
• Mounting bolt torque checks
• Air quality monitoring
• Electrical connection verification
• Function testing
• Cleaning and lubrication

Troubleshooting Common Issues

• Mounting misalignment problems
• Air leakage issues
• Electrical connection faults
• Seal failure symptoms
• Response time degradation
• Compatibility issues

Industry Standards Compliance

• NAMUR NE 43 standard
• ISO 5211 mounting interface
• IEC 60534 electrical standards
• ATEX compliance for hazardous areas
• ISO 9001 quality standards

Accessory Compatibility

• Position feedback sensors
• Manual override devices
• Flow control accessories
• Pressure regulators
• Quick exhaust valves
• Speed control mufflers