Air Pilot Namur Valve

Size 1/4" BSP
Function 5 way 2 position double pilot namur
Valve Operation Servo Assisted
Body Aluminium
Pressure Range 1.5 to 8 BAR
Media Air

• What is a Five Way Two Position Namur Pilot Spring Valve?

  A Five Way Two Position Namur Pilot Spring Valve is a pilot operated valve that has five ways and two positions. The easiest way to explain this is that it has one supply port (pressure in), two advance ports (outlet ports that seal on the face of the pneumatic actuator) and two exhaust ports (ports that exhaust air from the actuator). It then has two positions or states which are opposite of each other; for instance in one state air will flow from one outlet port while air is exhausted back through the other port while it is reversed in its other state. The valve is changed position by a pilot signal at one end of the body and then a spring at the other (the valve will spring back to its resting position when the pilot signal is removed).

• How does a 5 way 2 position Namur Pilot/Spring Valve work?

  These valves are commonly referred to in the industry as a 5/2 Namur Pilot Spring Valve. This is because they have 5 ways and 2 positions, operated by a pilot signal at one end and have a namur interface (directly mounts onto the face of the actuator). These can't really be referred to as Normally Closed or Normally Open like two way or three way valves as they are effectively always open, it just varies which of the two outlet ports it is coming out. The middle port on the bottom of the valve is the inlet or pressure supply port, from here it will go out one of the outlet ports which is directly interfaced with the actuator while the other outlet port will be taking the exhaust air from the other side of the actuator piston and directing that through the body of the valve to one of the exhaust ports on the bottom of the valve (next to the inlet pressure port). The valve is sealed to the face of the actuator by an o'ring seal around each of the outlet/advanced ports. When the valve is operated this sequence is just reversed.

• How do I know that a 5/2 Namur Pilot Valve is the right valve for me?

  The first thing to check is if you want your 5/2 valve to mount directly to the actuator (which would be a namur) and what you want your pneumatic actuator to do. If this is just an open/close (full stroke) cycle and you want it to run off a pneumatic signal, then a 5/2 pilot/spring valve will be well suited. The next thing to check is whether you want a single pilot operation or a double pilot namur which we call bi-stable (these are less common but are still used).

• How long will my Namur Pilot/Spring Valve last?

  Like any valve this depends upon the usage case, duty cycle and external environment of the valve. The pressure, temperature and characteristics of the media (eg. is it clean filtered air) will have a large bearing on how long your valve lasts. If your valve is cycling every second, 24 hours a day then its life will be shorter than one which is used once a day. Your valve also will take in a small amount of air from the atmosphere through the exhaust ports in the bottom of the valve as the spool moves over within the valve. We recommend using silencers or speed controllers to protect against ingress of foreign materials here.

• What are typical uses of a 5 way 2 position Namur Pilot Spring Valve ?

  These 5/2 pilot/pilot valves are really used to mount directly onto the face of pneumatic actuators to allow control of the actuator (open/close). This allows you to achieve a pure pneumatic set up.

• How do I install my 5/2 Namur Pilot Spring Valve?

  The namur double pilot valve will be mounted directly over the pressure supply ports on your actuator (assuming your actuator has a namur interface which almost all do now days) so it is important to ensure this area is clean and dry. From here the 5/2 namur valve will be placed against the face of the actuator carefully ensuring that the two oring seals around the outlet ports of the 5/2 namur are still in place. Once this is verified the two socket head mounting bolts can be tightened up to hold the valve in place. The two exhaust ports on the bottom of the valve can be left open however we do recommend a silencer or exhaust speed controller is used to protect it from the surround environment. The pilot signal line on the end of the body can then be connected. Your valve and actuator will now be operational once air is applied.

• How long will my product take to get to me? 

  This depends upon where you are based and the freight method chosen. If the express freight option is selected it is usually next day delivery to metropolitan areas in Australia for under 5kg. If free freight has been selected it will go by road freight which can be anywhere from 1 to 10 days depending upon your location. It usually averages 3 days. You can rely on us to do everything to despatch your order the same day we receive it, this is what we do.

• What warranty do I get?

  We have been manufacturing Valves for over 30 years so we have a lot of experience at making a great valve. All of our products come standard with a 12 month warranty. The good news is we have very strict quality controls and all valves leave our warehouse tested (full material and testing certificates are available) and inspected so there are rarely any issues. Also once your valve is in and operating it will most likely continue to do so for a very long time barring any debris getting caught in the valve and your air supply is clean and dry.