No, more Namur!

Namur mount manual reset solenoid valve. Configurable to 3/2 or 5/2 operation through face seal orientation

Namur mount manual reset solenoid valve. Configurable to 3/2 or 5/2 operation through face seal orientation

Shows D50 series valves with seal configuration left to right as 5/2, 3/2 NC and 3/2 NO functions

Shows D50 series valves with seal configuration left to right as 5/2, 3/2 NC and 3/2 NO functions


Commonly used on pneumatically actuated ball and butterfly valves, the Namur mount solenoid valve has long been accepted as a cost effective solution in a competitive actuation market. For some applications though, we have been told by customers that they have to use inline valves for their instrument assemblies because they need manual reset operation or 5/3 with ATEX certification and their only choice was therefore to hard pipe an inline solenoid valve.

For actuation requirements with one solenoid valve, it would be better to remove the need to mount and hard pipe any pilot valve specification. This would make you more effective against your competition by reducing your costs; increase throughput in your workshop by reducing assembly time; simplify maintenance requirements for your client; and reduce the number of potential air leak paths to improve plant air consumption.

Namur mounted valves are ideal to achieve this but many manufacturers have a limited range and a particular specification or certification may not be available with the following types of operation needed for common applications:

• Single acting actuators: 3/2 normally closed; 3/2 normally open; 3/2 manual reset; 3/2 manual latch – electrical trip; 3/2 dual coil bistable.

• Double acting actuators: 5/2 monostable; 5/2 dual coil bistable; 5/2 manual reset; 5/2 manual latch – electrical trip, 5/3 all ports blocked; 5/3 all ports to exhaust.

Shows D50 series valves with seal configuration left to right as 5/2, 3/2 NC and 3/2 NO functions

There is now a simple solution to this. All the above operations can be achieved with only six Namur valve models manufactured by Nadi Srl in Italy:

• D50 – configurable to 3/2 normally open, 3/2 normally closed or 5/2 operation.

• D51 – dual coil version of D50 configurable as 3/2 bistable or 5/2 bistable.

• D52 – 5/3 all ports blocked Namur mounted solenoid valve.

• D53 - 5/3 all ports to exhaust Namur mounted solenoid valve.

• G50 - configurable as 3/2 manual reset or 5/2 manual reset operation.

• G73 - configurable as 3/2 manual latch with electrical trip or 5/2 manual latch with electrical trip.

These valves are available in brass or 316 stainless steel with ATEX or GOST certification and options for operation at ambient temperatures down to -60°C. Valve configuration is user selectable by means of the Namur face seal orientation and full size exhaust ports allow the easy fitting of flow regulators for actuator speed control. Manual operators are also optional on the D series valves for manual valve cycling.

Nadi Namur solenoid valves– a complete range of solutions for actuator pilot applications.

Red Dragon Ltd
Tel: +01443 772500
www.reddragonvalves.co.uk


Published: 18th November 2014

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