Test I.S. Barrier,How frequently should you test them?What is the testing procedure for one?No special maintenance of intrinsically safe systems is required.

The datasheet does not give the DC coil resistance, but we measured it at 30R.The datasheet does not give the coil inductance.

Some control valves, like Samson model 3241, strongly recommend that the pipeline upstream and downstream of the control valve should be straight and free of obstructions for a length of at least 6 ti

Where a valve is needed for regulating the pressure inside a process. The issue is that the pressure setpoint.Varies quite a lot. The valve(s) is installed downstream of the process, and the process i

There were human factors at play, but a critical pilot operated relief valve was also faulted. I've seen this noted in many reports as well as all over the net and unfortunately also Wikipedia which e

About contact corrosion between the galvanised bolts-nuts-washers and the stainless steel flanges. Is it not neccesary to worry about this, or are measurements needed.

What is the maximum power drawn by stepper motors in my system.The system is like a domestic shower, where valves in the hot and cold pipes are moved with stepper motors.

Here is a normally-closed solonoid valve (the 24VDC one) which i wish to use to keep open (or indeed closed) a pipe of water in a domestic household in UK,have many years experience in specifying and