What is a NAMUR valve?

NAMUR valves are used as pilot valves to control the actuator in many flow processes. These include dosing and releasing, mixing and distributing, and shutting off the supply of gases, liquids and bulk materials, such as powders or grains.

What is NAMUR SOV?

A NAMUR solenoid valve is directly mounted to pneumatic actuator inlet/outlet ports. The function of a NAMUR solenoid valve is to control media flow: the valve itself is controlled by an electric solenoid, which opens or closes the valve, by controlling the amount of air thru a pilot to the pneumatic actuator.

What is NAMUR standard for solenoid valve?

NAMUR solenoid valve definition NAMUR solenoid valves are used to control media flow. The valve’s electric solenoid opens or closes the valve by controlling the amount of air via a pilot to the pneumatic actuator. The solenoid and actuator work in tandem to control flow speed, flow amount, and flow direction.

What is NAMUR instrumentation?

A NAMUR sensor is a non-amplified sensor that supplies two different signal levels depending upon switch state. These signal levels are low-level current. A logic interface circuit, controller, PLC, DCS, or intrinsically safe (IS) barrier is needed to read these current levels.

What is NAMUR standard?

NAMUR is a signaling standard, used primarily on proximity and limit switch devices. It outputs a current signal depending on the state of the switch. The switching spec is >2.1mA (typically but not always for NC) and <1.2mA for the opposite switch state.

What is a 5 port solenoid valve?

5/2 solenoid valves and 5/3 solenoid valves are most often used as directional control valves for double-acting pneumatic actuators. The single-coil type of 5/2 valve usually has a spring or pilot air return so that when de-energised, the valve returns to it’s starting function.

What is NAMUR shaft?

NAMUR shaft conforms to NAMUR standards and allows direct attachment to actuator pinions without a coupler. This shaft typically features an alignment pin, which fits into the tapped hole in the actuator pinion. They are usually shorter than the standard shaft.

What is NAMUR setting?

NAMUR-compliant transmitters are designed to limit their output signals between 3.8 mA and less than 21 mA when functioning properly. Signals lying outside this range indicate some form of failure has occurred within the transmitter or the circuit wiring.

What is the meaning of NAMUR output?

a NAMUR output sensor is a type of sensor that is trying to circumvent this issue by representing the switch states (ON and OFF) with two levels of resistance. The sensor is operated with a nominal operating voltage of 8.2 V.

Is NAMUR Intrinsically Safe?

In a nutshell, NAMUR proximity sensors were developed to ensure safety in hazardous locations. NAMUR proximity sensors are used in classified hazardous location areas that have explosive gas, dust, or fibers present. NAMUR proximity sensors are considered Intrinsically Safe.

What is the difference between single and double pilot 5’2 operated valve?

The single-coil type of 5/2 valve usually has a spring or pilot air return so that when de-energised, the valve returns to it’s starting function. Dual coil valves do not have this return facility and require the second coil to be energised to return the valve to the start position.

What is 5/2 pilot operated direction control valve?

A 5/2 way directional valve from the name itself has 5 ports equally spaced and 2 flow positions. It can be used to isolate and simultaneously bypass a passage way for the fluid which for example should retract or extend a double-acting cylinder. There are variety of ways to have this valve actuated.

What is the NAMUR standard?

NAMUR is an acronym for the User Association of Automation Technology in Process Industries, which provides an industry-wide standard for automated valve technology.

What is NAMUR output?

How does a 3 way pilot valve work?

This pilot valve is a small direct operated 3/2-way valve. The pilot valve delivers compressed air to a small air cylinder inside the valve. The compressed air in this cylinder pushes against the piston and actuates the solenoid to switch the valve. This way, a relatively small solenoid can be used to switch the valve.

How does a NAMUR switch work?

NAMUR sensor switching circuit A NAMUR proximity sensor has a switching circuit similar to a typical proximity sensor, but instead of making and breaking an external circuit, the switching circuit is used to change the output current flow by altering an internal resistor network.

What is the assemblage for Namur pilot-valve and actuator?

Assemblage between NAMUR pilot -valve and actuator or with threaded plate type GPN-1/4” for direct piping. DRN 611 DRN 601 DRN 3 … for single-acting actuators DRN 5 … for double- acting actuators

What is a Namur valve?

The NAMUR-interface NAMUR-valves are control valves which offer an assemblage interface according to the standard VDI/VDE 3845. NAMUR-valves are different from other in-line valves as they offer two ports on the flat side of the valve.

What kind of Namur valve is the FP 701?

Adding the Flex-Plate type FP 701 , the valve is converted into a 3/2 – way NAMUR-valve with air recirculation for the spring chamber (purge). TheMNH 351 701offers a combined spring return.

Where can I find the Namur-interface for valves and actuators?

Chapter 11: Valves and Actuators with the NAMUR-interface Page 1 Hafner-Pneumatik Krämer KG, Stammheimerstraße 10, D -70806 Kornwestheim, Germany, Phone: 0049-7154-178589-0, E-Mail: [email protected] , web : www.hafner-pneumatik.com