8/28/2023 0 Comments Sil air 15a![]() There is a glass bubble on the rear of the compressor under the electronics box that allows you to check the oil level at a glance, which is especially handy if you are refilling it. It's much easier than trying to drip it in via the oil inlet on the side, which is at a curious angle, and a bit narrow, so once you've checked on how that affects your guarantee, unscrew the lid and be done with any faffing. The compressor is hidden away inside the rear of the unit, and has a removable lid that is held in place by a retention strap, which can be unscrewed to open the compressor to add the correct quantity of oil. Removing the cover is simple, requiring the user to undo just 6 bolts, then lift off the part carefully for easy access to the internals. It has rubberised feet that dampen any vibration against the floor, a large thick-gauge steel cover that is powder coated and bolted to the chassis onto which all the other parts are attached. It is roughly double the height of the smaller models, and weighs in at an impressive 18.3kg, which makes the user glad there's a carry-handle on the top to lug it about. The D model is larger than the others, and has a much bigger receiver that holds up to four litres of compressed air at up to 87psi (6bar). ![]() For transport to the user they are supplied drained of oil and with an oil bottle supplied in the package to refill it prior to its first use, and if you move house or transport your unit further than the end of the garden, it's a good idea to follow their lead. It also means that you should keep the compressor on a level surface, and always upright. The compressor within is a refrigerator type oil-filled unit, which requires the best part of a litre of oil for operation, and this should be changed annually to prolong reliability. They all have on/off switches, an air filter to keep contaminants from entering the receiver, and an adjustable regulator with built-in moisture trap. This makes for an efficient set-up that requires minimal input from the user other than to set the pressure they require. The Automatic compressors have a cut-off valve that stops the motor running when the receiver is up to pressure, and re-starts it once the pressure has dropped past a certain level. The hobby end of their range are the Sil-Air 15 models, and they start with a small receiver tank of around a litre to remove both the need for the motor to run constantly, and to remove the pulse from the airline that can affect the spray pattern of your airbrush under some circumstances. This renders them almost inaudible in a quiet room, and once you add some background noise or music, you'll not hear a thing until the tank is full and the relief-valve blows off. Their Sil-Air brand is well known as being amongst the quietest compressors in the market, being somewhere around the noise levels of a very quiet computer at 28-31db. Italian company Werther make a large number of compressors both under their own name, and for other companies around the world.
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