Valves- All you need to know about Valves

Archive for September, 2009

is £1 per hour about right cost to run central heating for 5 rads i tested it today because i use a pre payment meter, i have 4 rads and i towel rad i left Thermostatic ValvValves on number 4 and timed it for 1 hour and it cost 98p is this cheap,expensive or about right.

its expensive ,,,damned expensive ,,sort out your landlord ,,or your supplier,,,,im a builder ,,so i know a bit about boilers ,,your boiler would have to be 3 times bigger to cost that much!

I think this unloader solenoid valve is a pneumatic solenoid valve.This vunloader solenoid valve is used in ingersollrand rotary screww type air compressor of model 9/235 HA IR.This compressor also useing start/run solenoid valve. My doubt is that what is the function of un loader solenoid valve and also this un loader solenoid valve is N/C orN/O.

I’m not familiar with this exact compressor, but I believe that in a screw type compressor, that the motor cannot start when high pressure exists in the secondary stage. So the unloader valve would be a N.O. valve that opens when power is disconnected in order to relieve the pressure so that when power is re-applied, the valve closes and the motor can start the compressor with low pressure in the secondary. If the valve is faulty and fails to close, the compressor is unable to build pressure.

I have an 04 Diamante and I did not want to pay the dealer the price for the part or labor. I want to try and do it myself but not sure how.

The PCV valve is very easy to replace and there is no need to pay outrages amounts of money for a part that cost 5 bucks at your local autoparts. Its generally located on the top of your engine and im sure your local autoparts will have no problem pointing it out to you in your car.

I understand that air behaves as a fluid so therefore i figure it may work but i would like some verification since water and air are molecularly different. I would plumbing grade check Valves temporarily for testing because they are cheaper and easier to get. I would eventually get pneumatic grade valves once i know that my system works as intended.

Yes, quite often you can. Many smaller screwed brass valves have AWG ratings which means "air, water gas". (That may be OWG, oil, water, gas) These are around the 125 -250 psig rating. This includes gate, globe, check. I do not know what a plumbing grade or pneumatic grade valve would be in this pressure range. We used the same valves, 125-250 psi screwed or 125 - 600 pound ANSI flanged and welded , equally for steam, water, compressed air and some gasses based on the pressure ratings. We used the Power Piping Code for nearly all services.
When we were in high pressures gasses we used CGA ratings. And there were specialities for extremely high pressure gasses.