Valve Assembler Catalog

NAMUR Interface Valves

NAMUR interface valves form the core of the Valve Assembler Catalog. These valves are designed to mount directly to pneumatic valve actuators per the VDI/VDE 3845 standard, serving as pilot valves to control actuators in flow process applications. The balanced spool construction delivers compact size, low profile, and high performance in a package that bolts directly to the actuator without additional piping.

The catalog covers NAMUR valves in three operator types: weather-proof solenoid pilot, intrinsically safe solenoid pilot, and explosion-proof solenoid pilot. Each operator type is available in 3/2 (normally closed), 5/2, and 5/3 (closed center, open center, and power center) valve functions. The D06 and D20 series provide 1/4-inch port sizes with maximum flow of 1.8 Cv (1,800 Nl/min) for 3/2 and 5/2 valves and 1.4 Cv (1,400 Nl/min) for 5/3 valves.

Valve Features and Design

NAMUR valves feature several design innovations that distinguish them in the market. The solenoid pilot uses full air line pressure to shift the valve, with a solenoid guaranteed against burnout. The weather-proof coil is hermetically sealed as an integral watertight molded unit with robust enclosures for rugged environments. The bidirectional tapered Tee-Seal eliminates sticking problems and has been tested tough and proven reliable according to SAE specifications, with rust and water injected every 864,000 cycles for 20 million cycles of testing. Manual override allows valve operation in case of electrical failure or for quick cycle testing, and the external pilot supply is easily field-convertible.

Standard Specifications

Standard specifications for NAMUR valves include spool construction with electrical solenoid pilot actuation, direct mount per NAMUR/VDI/VDE 3845, NPT threaded connections, and push non-locking manual override. Operating temperatures range from -20 to 123 degrees Fahrenheit (-29 to 50 degrees Celsius) for ambient/media conditions. Operating pressure for D06 series 3/2 valves is 0 to 10.3 BAR (0 to 150 PSIG), while D20 series 3/2 valves require 2.4 to 10.3 BAR (35 to 150 PSIG). 5/2 valves operate at 35 to 150 PSIG, and 5/3 valves require 50 to 150 PSIG. Construction materials include bar stock aluminum body, polyamid 66 solenoid body, stainless steel spool, and Buna-N seals.

Model Number Configurator System

One of the most valuable features of the Valve Assembler Catalog is its detailed model number configurator system. Each valve section includes a step-by-step configurator that walks users through every option to build a complete part number. The configurator covers series selection, valve function, port size, valve body height, actuation type and location, voltage selection, seal material, pilot supply, coil options, dustproof features, body material, port thread type, manual override type, mounting kit, and transition plate options.

For example, a typical 3/2 weather-proof NAMUR valve model number like D2013GAWR-DB decodes as follows: D20 series, 13 (1-inch body height), G (molded coil with 18-inch flying leads), AWR (single solenoid right), DB (24V DC). Additional option codes can be added in alphabetical order for features like fluoroelastomer seals (A), external pilot supply (B), conduit coil (C), dustproof vent ports (D), transition plate (P), stainless steel body (S or SS), and G thread (W).

The configurator system is replicated for each valve type, including 5/2 weather-proof, 5/3 weather-proof, and all intrinsically safe and explosion-proof variants, ensuring that assemblers can generate precise model numbers for any configuration.

Solenoid Configurations and Valve Schematics

The catalog provides valve schematics for every configuration showing port numbering and flow paths. For 3/2 valves, single solenoid options include top, left, and right pilot positions. For 5/2 valves, single solenoid configurations are available in left and right pilot positions, plus a double solenoid option. The 5/3 valves use double solenoid actuation with closed center, open center, or power center return positions. Each schematic shows the standard port designations (1, 2, 3 for 3-way; 1, 2, 3, 4, 5 for 5-way) and pilot signal ports (10, 12, 14).

Product Credentials and Safety Certifications

Automatic Valve NAMUR valves carry extensive product credentials and safety certifications that make them suitable for the most demanding industrial applications. The catalog highlights functional safety approval up to SIL 3 (Safety Integrity Level per IEC 61508:2001), demonstrating the highest level of process safety for pneumatic control applications.

Additional credentials include CSA certification (C22.2 and UL STD 429), Factory Mutual approval for explosion-proof environments, ATEX certification for explosive atmospheres, and CE marking for EMF and Low Voltage Directives. These certifications are critical for valve assemblers and OEMs who need to comply with regional and international safety standards across different market segments.

The comprehensive certification portfolio means that Automatic Valve NAMUR products can be deployed in general industrial settings, hazardous locations classified per NEC/CEC divisions and zones, and safety instrumented systems requiring functional safety compliance. This breadth of certification makes the Valve Assembler Catalog particularly valuable for international OEMs and distributors serving diverse geographic markets.

Integrated Filter/Regulators

The Valve Assembler Catalog includes a complete section on integrated filter/regulator assemblies available in three series. The Miniature series provides flow up to 25 SCFM for compact installations. The MD3 series delivers flow up to 110 SCFM for mid-range requirements. The MD4 series handles flow up to 230 SCFM for high-capacity applications.

These filter/regulators consolidate filtration and pressure regulation into a single assembly, reducing component count, potential leak points, and mounting space requirements. They are designed to work seamlessly with the NAMUR interface valves in the catalog, creating integrated control packages for process valve actuators. Each series section includes specifications, ordering information, and accessories such as mounting brackets, gauge kits, and replacement elements.

L-O-X Lockout Valves for Energy Isolation

The L-O-X series lockout valves provide energy isolation for pneumatic systems during maintenance, repair, and equipment changeover operations. These valves support lockout/tagout (LOTO) compliance by ensuring that pneumatic energy can be safely and reliably isolated and locked in the OFF position.

The L-O-X valves feature a large, bright-red handle for high visibility, a padlockable mechanism that can only be locked in the exhausted (off) position, and a full-size exhaust port for rapid downstream depressurization. The catalog includes L-O-X valve specifications, ordering data, and accessories including mounting brackets and pressure sensing components.

By including lockout valves alongside directional control valves and air preparation components, the Valve Assembler Catalog gives assemblers everything they need to build complete pneumatic control packages that include both process control and safety isolation functionality.

Technical Data and Dimensional Drawings

Every product section in the Valve Assembler Catalog is accompanied by detailed technical data tables and dimensional drawings. Valve technical data includes port sizes, flow ratings in Cv and normalized liters per minute, and weights in both pounds and kilograms. Dimensional drawings provide measurements in both inches and millimeters, with multiple views showing overall length, width, height, mounting hole patterns, and port locations.

The catalog provides dimensional data for every model variant, including different body heights (1-inch and 1-1/4-inch for the D20 series), single and double solenoid configurations, and left and right pilot positions. Bottom view drawings show mounting bolt patterns and pilot port locations for proper actuator interface planning. CAD models are noted as available for download, facilitating 3D modeling and integration into larger assembly designs.

Frequently Asked Questions

What products are covered in the Automatic Valve Assembler Catalog?

The Valve Assembler Catalog covers NAMUR interface valves (weather-proof, intrinsically safe, and explosion-proof in 3/2, 5/2, and 5/3 configurations), integrated filter/regulators (Miniature, MD3, and MD4 series with flow up to 230 SCFM), L-O-X lockout valves for energy isolation, and accessories for all product categories. It includes complete ordering information, model number configurators, and dimensional drawings.

What is a NAMUR interface valve and how is it used?

A NAMUR interface valve is a solenoid pilot-controlled pneumatic valve designed to mount directly to pneumatic valve actuators per the VDI/VDE 3845 standard. It serves as a pilot valve to control the actuator in flow process applications. Automatic Valve's NAMUR valves use balanced spool construction and are available in 1/4-inch port sizes with Cv up to 1.8. They support 3/2, 5/2, and 5/3 valve functions with single or double solenoid actuation.

What safety certifications do Automatic Valve NAMUR valves carry?

Automatic Valve NAMUR valves are certified up to SIL 3 per IEC 61508:2001 for functional safety. Additional certifications include CSA (C22.2 and UL STD 429), Factory Mutual for explosion-proof environments, ATEX for explosive atmospheres, and CE marking. Hazardous location ratings cover Class I Division 1 Groups A through D, Class II Division 1 Groups E through G, and various NEMA and IECEx ratings.

How do I configure a model number for an Automatic Valve NAMUR valve?

The Valve Assembler Catalog includes detailed model number configurators for each valve type. You select the series (D06 or D20), valve function, body height, actuation type and location, voltage, seal material, pilot supply type, coil option, body material, port thread, manual override type, and mounting kit. Option codes are added in alphabetical order. For example, D2013GAWR-DB specifies a D20 series, 1-inch body height, molded coil, single solenoid right, 24V DC valve.

What is the Tee-Seal technology in Automatic Valve products?

The Tee-Seal is Automatic Valve's proprietary bidirectional tapered seal that eliminates spool sticking problems in pneumatic valves. The Tee-Seal flexes to clean the spool surface, is mechanically locked to prevent spiral twist or extrusion, and wipes away air line sediment during operation. It has been tested per SAE specifications with rust and water injected every 864,000 cycles for 20 million total cycles, demonstrating exceptional reliability in contaminated air environments.