Now we’re going to talk about Winters, what we call the economy series, the PEM gauges. These gauges come in inch and a half dial size all the way up to 4 inch. They come bottom connect and back connect and the standard thread sizes on these gauges are going to be 1/4 inch, as shown here, or 1/8 inch on the back connect and on your smaller gauges.
The Winters PEM series is brass internals and socket and can be used on any noncorrosive product. Winters PEM series comes standard with dual scale, which will be PSI and KPA. These gauges cannot be liquid filled based on the style of steel case with a pressed on bezel. They do come with an acrylic lens.
The PEM series works very well on airlines, oil lines, anywhere, as we said before, that it’s a noncorrosive media. If you are using the PEM series on potable water, you need to then go to our lead free. The way lead free is indicated on a PEM series is, at the end of the part number it will say –LF, so any potable water applications should use the lead free type of gauge.
The accuracy on a PEM is 323, which is an ASME grade B. If you ever come across that in a specification, this would be the gauge to use. The pressure ranges on the PEM range from full vacuum compound gauges, up to about 400 psi in most of the dial sizes. There are some cases in the 2 ½ that you can go up to 3000 psi. If you need to go higher than that, we generally recommend that you go to an all stainless steel gauge.
The PEM has a drawn steel case with a pressed on bezel. Some of the versions will have a steel bezel and some will have a chrome plated bezel. As we said before, the lens is acrylic. The internals on the PEM is going to be brass. That’s why we said it can only be used on applications that are noncorrosive.
Most people that use PEMs are using them as reference gauges. If you think of some basic applications it would be on, just a pressure tank for air pressure, you think of your home use on a compressor that you might have that you pick up at a Home Depot or a Granger. From an industrial standpoint, you will see them on their lube lines, you’ll see them on airlines going through the shops. Anywhere where it’s really a reference, it’s not really controlling the process, but it lets them know relative pressure that’s in that system.
The gauge is not liquid fillable, which generally means that, if you can’t keep water in, you can’t 100% keep water out. If you look at it, if the gauge was being used outside and it was just in light rain or something of that nature with just some slight protection, they would probably hold up okay. But if there was a torrential downpour or somebody hosed down, there is a chance that you would get moisture inside a gauge like this. When that happens, you can get condensation on the inside of the lens, and that’s when you get a problem because then you can't see the dial anymore.
You can use the gate upside down. In some cases we actually sell what’s called top mount gauges and all that is is a rotation of the dial. When we calibrate them, though, we calibrate them in this position. If you put this gauge upside down, depending on the pressure, you might have a slight change in your accuracy. The higher the pressure, the less that change would be because your hairspring and your board on tube is much stiffer. If you were at a 15 psi or a vacuum gauge and you turned it upside down, you might see the needle shift a little bit because of that light hairspring.
This is an inch and a half, and as you see, it’s back connected. The inch and a half, the 2 inch, the 2 ½, and the 4 inch all will come bottom connected, but the 4 inch does not come back connected in the PEM series. All the other ones, the inch and a half, two, and 2 ½ can be gotten in the back connect. The inch and a half and 2 inch can come standard with 1/8 inch connection or 1/4 inch connection. The larger gauges are generally just quarter. That is an NPT connection, meaning national pipe thread.
If this gauge is just going to be put on static pressure, meaning if you had a tank, you set it on top, you are going to run it up through, this is 100 pound gauge, up to 60 and it was going to sit there, the gauge could last for years. But if the gauge is being subject to a lot of oscillation, meaning pressure going up or down, or if it was vibrating and shaking around, especially where they are not liquid fillable, then the gauge is going to wear out much quicker.
Winters has a five year warranty on all of our pressure and temperature gauges. They come with a very good warranty, we have ISO-9000 manufacturing facilities that are owned by Winters, so you’re getting a quality product that Winters is proud to stand behind.
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Those syle of Dressor's are not easy to find out there. We used to use this style for the 2" x 1-1/2" swage pipe reducer assemblies for the reverse air-pulse system years ago with our production. We cut those Dressor Couplings in half, and weld those cut ends to the side of the steel filter housing. Of course, with the rubber ring gasket removed. Thank you Trupply for having those in stock, and also reasonably priced, too.