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FAQ

I have a 1997 ford aerostar and my mechanic just called me and said that the pop off valve needs to be replaced, but it is attached to the line so the hole line has to be replaced to. I want to try to find the pop off valve to see if I can get it b/c he can't find the replacement part, what I need to know is what it looks like. or where it is on an aerostar, because I have 5 more sitting in the driveway and I can look for it.

1. the pop off valve is normally located in the compressor so if it over pressures it will relieve some of the pressure. it's not in a line. #2. if it's a 1997 it doesn't have R12. it has R134. the only valve in the line is the port to check pressures and vacuum and recharge it. it could have one of those valves leaking and most can be taken apart and a new schrader valve installed. hope this helps.

what is a foot valve? how does it look? what is the application in petrochemical companies?

A foot valve is placed at the bottom of a suction pipe, which could be used to drain a large container of liquid. The foot valve is a one-way valve (check valve) that prevents the liquid from draining back into the container.

as we are strating centrifugal pump with discharge valve close and can not start positive displacement comp. with disch. valve closed

You should probably be talking to a local factory representative for both the pump and the compressor and explain to them what you are trying to do. I am sure they would be happy to advise you. Sure beats damaging yourselves or others by doing this wrong.

what is a silicone purge valve.

A purge valve is used when a system or object can sometimes be filled with unwanted substances during normal use, as a way to eliminate those substances without complete disassembly. A 'spit valve' (a kind of purge valve) is built into some musical instruments to allow getting rid of saliva which builds up inside during playing. Snorkels used for skindiving often have purge valves (some even made from silicone) to make clearing water easier. A purge valve may be used to drain occasional condensation from inside a gas line. If this is too general, please edit your question to add details.

I don't know the principle of operation of the butterfly valve. Can I control the percentage of opening by an analog output from the PLC?

A okorder /... All of the control valves I have installed have been electric and used a 4-20ma to control the position of the valve. I used a Watlow controller to produce the 4-20ma. I use it to control the flow of chilled water for a process. I would contact tyco and tell them you are checking into prices and what it would take to run a 2 butterfly valve to control chilled water. I want it to be ran by an analog output from a PLC. They will be able to give you the information that you need. I hope this helps, Good Luck

What is the primary function of valve seals?

A 'leak-down' test is the best bet, indicates the place in the process the compression is leaking and if it's across the valve stems than for definite the seals need replacing. Are not able to judge it via the smoke correctly as oil would be slipping previous the rings also.

The valve on my radiator has numbers on it to determine the amount of air/steam leaving the heating system. what number should i put it on and how would i determine it

I would think the easiest way would be to put a thermometer on the radiator (with the bulb in the air flow), turn the heat on to one setting and record the temperatures each half hour for about 4 hours. Then, turn the adjustment to a higher (or lower) number and repeat that. That way, you'd know which way to turn to set it. Of course, the level at which you'd be comfortable would be found by trying different settings. Assuming the adustment is a valve, valves in the USA will open by turning counter-clockwise. Closing is, of course, clockwise. Hope that helps. EDIT: I received your email - I don't mind at all! OK, so you have only one valve for all the radiators. Without knowing anything else, I'd say you just removed the part called the bonnet (the upper half of a valve). It shouldn't matter which number it's set on if it's reinstalled correctly. When a valve is removed, the best way to put back is to open it slightly (turn counterclockwise to a low number), then reinstall the bonnet. Once it's back in, it should work like normal. If that doesn't work, perhaps you can get a plumber or a local handyman to check it. As to the upper ones being airlocked, it really sounds like there is a blockage in the supply line. I am assuming this is steam-heat radiator that is supplied by a boiler-type heating unit?

Around the relief valve there is water leaking it is not the valve it's self or the threads it's around the out side of it. The valve is on top of the heater

Hi, Unless the valve released isn't seating properly then you're better off to just replace it, maybe it's stuck thats where pressure is being released?