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Try this www.co-ax.com.

You need to talk to the valve manufacturer and find out what their thrust requirement for the valve is at the specific line pressure. Once you know this you can size a linear actuator based on the pneumatic pressure available. The pneumatic actuator will generally be much faster in operation...

In my experience the certifcate must state 3.1.b. If it does not, it can be very dificult, most of the time impossible, to have the paperwork accepted by third party inspection authorities.

Using two dial test indicators simultaneously.

Take a look at this pdf file reference table 8. It appears to show the various equivalents. I think the specification now is BS EN 10083-1 CR22E. www.dstan.mod.uk/data/03/016/00000200.pdf

Try these www.hydac.com www.colson.co.uk

It is worth mentioning, as you can see below, BS3602 has now been superceded and withdrawn. Pub Id : BS 3602 Status : Superseded , Withdrawn Title : Specification for steel pipes and tubes for pressure purposes: carbon and carbon manganese steel with specified elevated temperature...

The spool clearance is generally dictated by the working pressure and the seal manufacturers recommended clearances for the seal design.

Have a look at this www.thermomegatech.com.

Try www.kvprocess.com.

Try some Johnson and Johnson Baby Oil - works every time!

I assume that when you say welding you are referring to socket weld flanged valves. If this is the case then it is normal practice to remove the centre section of the valve and weld the flanges to the pipe. When welding is complete and the pipe/flange assembly cooled, the valve centre section...

My apologies, my previous thread website should be www.co-ax.de.

Try this company www.coax.de

In my experience it could be that you are seeing the result of a certain amuount of ovality casused by distortion during the threading and possibly other machining processes. For example, is there a lot of other machining taking place before the thread is cut thus causing the distortion to...

Try Northvale Korting

Material for the Manifold block is largely dependent on the pressures and therefore the stresses the manifold will be subjected too. The manufacturer of the cartridge valves will give you advice on this. However here is a material that was developed for pressure manifold type duties...

This is a good all round book Newnes Mechanical Engineer's Pocket Book. ISBN 0-7506-3262-3.

You must also consider speed of operation. If you plan actuate the damper blade very fast you will get significant momentum generated back through the shaft. Ideally the damper blade should have its own integral end position stops to help to minimise the amount of backdriven torque that will...

Take a look at the Parker Hannifin or Swagelok websites.