Air dryers should be used when you want to remove or reduce the humidity levels in your compressed air system to meet or exceed the air quality requirements for the compressed air demands of your tools, equipment, or applications.
Dew point is the temperature where air is saturated with water and moisture will begin to condense. In other words, it’s the point where condensation (dew) begins to form. Dew point is always stated as a temperature and is most common measurement of compressed air water content.
In compressed air applications, pressure is critical when discussing dew point. Compression and expansion of air affects its dew point. Generally speaking, compression increases dew point, and de-compression lowers dew point. For this reason, the phrase Pressure Dew Point (PDP) is commonly used. This term refers to the dew point of the compressed air at full line pressure. On the other hand, Atmospheric Dew Point refers to what the dew point would be if fully depressurized to atmospheric conditions.
The best and easiest way to determine this is by checking the equipment manual or by asking the manufacturer what the Pressure Dew Point (PDP) requirements are for your equipment. Another method is to calculate the dew point temperature. However, many industrial applications specify a pressure dew point of -40⁰ F/C at line pressure. This is often found in process industries, facilities where air lines will be exposed to cold ambient air, and systems where compressed air interacts with sensitive instruments and processes.
Determine the lowest ambient temperature your compressed air system will be exposed to by checking the location of air lines throughout air conditioned or unheated areas. Take that temperature number and lower it by 20°. This will give you dew point temperature needed to prevent condensation from forming.
Air drying is the removal of water vapor (humidity) from compressed air. This can be done by using a desiccant, membrane, refrigeration, or deliquescent dryer. Air filtration uses specific filters to remove particulates, water, oil droplets, and aerosols. These are to be removed by the filters before entering the dryer. Ideally, filters and dryers work together to produce clean, dry air for your application.
The further away from the compressor, the more effective your filtration will work. For water separators, place them at all air tool drops with regulators. It is recommended to use the filters in front of the air dryer to act as pre-filters. Placing filtration closest to the inlet side of an air dryer will allow for optimal performance and longevity of the drying unit.
Both filters perform similarly in cleaning out contaminates but with opposite air flow. Coalescing filters have an air flow going to the center of the element with the air filtering towards the outside. The contaminates exit through the sides and drain to the bottom of the filter. Particulate filters flow opposite. In this element, the air flow is going down the sides of the filter and sending contaminates to the center.
Neglecting to consistently drain condensate and contamination will result in endless headaches and costly downtime. Inadequate or forgotten draining dramatically wears on filtration systems causing them to become ineffective and damaging to critical equipment and processes. There are a variety of drain styles to assure timely and effective draining for your facility.
Float drains contain a float within the device that normally seats on a small orifice. When liquid enters the drain the float rises off its seat, exposing the orifice and allowing liquid to discharge through the stem. As the liquid level drops, the float re-seats and seals the orifice. These drains operate only when a sufficient quantity of condensate is present. Usually, a manual override is provided which allows for drainage of the system on demand or during cleaning. Most float-operated drain valves leave a small amount of condensate in the reservoir when discharging, this prevents the loss of valuable compressed air.
Electronic drains incorporate a solenoid valve and an electric timer with two on/off settings. ON is the setting for the amount of time the valve needs to stay open (0.5 to 10 seconds) and OFF is the time between openings (0.5 to 45 minutes). The two settings need to be adjusted to the size of the compressed air system in such a way that all condensate is discharged with a minimum loss of air. This can be fined tuned based on the system. It is also highly recommended to use an inlet strainer on the solenoid valve to prevent debris from fouling.
Pneumatic drains are simple and robust. An external condensate reservoir collects liquid. When the liquid rises to a set point a mechanical switch sends pilot air to an air cylinder that opens a ball valve, draining the reservoir and returning the piston to a relaxed position. The ball check closes preventing zero pressure loss in the system. The drain port opens and the stored condensate is ejected. No compressed air is wasted in the process, except for the tiny amount of pilot air.
Hydraulic hose assemblies commonly operate in rough and demanding conditions. Thus, a hose is often exposed to flying debris in mobile equipment and the likes of weld spatter and hot metal chips—or even the errant lift truck—in industrial settings. Add to that, hoses subjected to continuous movement and machine vibration can rub against each other and adjacent equipment. That can erode hose covers, expose the reinforcement to dirt and moisture, and lead to quick failure.
Circumference and diameter both refer to specific parts of a circle. The diameter is the distance across the circle at its widest point, passing through the center. The circumference is the perimeter, or distance around the circle. The circumference of a circle is calculated by using the diameter in an equation: C = D x 3.14
The Inside Diameter is the inside measurement from one inside edge to the other inside edge on the interior of a hose, tube, pipe or other object. It is often abbreviated as I.D.
The Outside Diameter is the outside measurement from one outer edge to the other outer edge of a hose, tube, pipe, or other object. It is often abbreviated as O.D.
The ASTM D6770 is referring to the standard test method for abrasion resistance of textile webbing using a hex bar abrasion tester. The resistance is expressed as a percentage of retained break strength.
The U.S. Department of Labor's Mine Safety and Health Administration (MSHA) works to prevent death, illness, and injury from mining and promote safe and healthful workplaces for U.S. miners. When a product is “MSHA approved”, is has received a formal document issued by MSHA which states that the product has met the applicable requirements.
Cutting your protective sleeve is simple! You can use a sharp high-quality scissors, knife, rotary cutter or a hot knife.
Determine hose OD or hose bundle OD. If needed find the circumference of the hose or bundle of hoses, then calculate diameter. Also assess if the hose or hoses have bends or movement during application as the sleeve will need to be over sized to accommodate. Sizing a sleeve to tight to the hose or bundle of hoses will hinder natural movement of the hose within the sleeve, causing premature hose failure due to possible abrasion. Typically size the sleeve 1 - 2 sizes bigger than your current hose or hose bundle OD.
A dash size refers to an ID of the hydraulic hose or fitting in 1/16” increments. Once ID of hose is determined, one can measure or find OD of hose (may vary depending on rating of hose pressure). Once OD of hose or hose bundle is determined you can size your sleeve 1-2 sizes bigger, also dependent on bends or movement of hose or hoses during application.
A hydraulic fluid injection is perhaps the most dangerous injury that can result from a hydraulic hose failure. One reason is that it can appear insignificant at the beginning so it often gets dismissed as not urgent. Another reason is that injected hydraulic oils are highly toxic - so in addition to a physical cut or stab, they poison you.
The longer the period of time before treatment, the more risk you are taking on. At first, injections may feel like a bee sting or wire prick and the entry area may look like just a pin prick. The size of the entry wound is a poor indicator of the seriousness of the injury. What looks like a simple puncture wound is in fact life threatening. The area around the injury typically turns red and swells within a couple of hours. Throbbing and numbness follow. If left untreated, the injury can lead to amputation and even death.
You should consistently lubricate your chain drives to resist friction and wear between moving parts and eliminate daily maintenance of chains and sprockets. Less resistance, means greater fuel economy. Chain breakage only happens when you are operating which can dramatically decrease productivity and operational profits.
Dust and sand stick to wet oils and greases, forming an abrasive paste. This abrasive paste worsens wear on chains, bearings, gears, hydraulic cylinders, and anything else it touches. Fertilizers act as corrosive agents. Heavy loads cause pressure that may not have been anticipated when the farmer made his lubricant choice, resulting in runout of lubricant where it’s needed most. Heat also causes runout when lubricants aren’t viscous enough, resulting in metal-on-metal contact. Water destroys everything it touches over time, even as it nourishes the crops we need to survive. Even more destructive than water are the plant juices that end up on moving parts as equipment passes over crops—nothing will contaminate lubricants faster.
The automatic oiler applies oil when the chain is warm and running. This is the best time to apply lubricant because you get the proper penetration. Consistent oiling minimizes metal-to-metal contact and provides cooling. Oil pumped to a brush located next to the chain maximizes the amount of debris cleaned off the chain while it disperses the oil to the pin bushing joint to help eliminate chain stretch.
An oiler kit has all the parts needed to install on round balers, combines, mower-conditioners, shredder attachments and other hydraulic-activated sprocket-chain equipment. Even the drill bit to drill the correctly-sized holes comes in the kit. All you add is your own tools. You also need to purchase two quarts of the appropriate SAE chain oil for your conditions. (See section on recommended oils.)
The type of oil is as important as the method of application. Most chain manufacturers recommend a good grade of clean petroleum chain oil without additives. Additives generally leave a varnish or gum residue which prevents oil from penetrating the chain joints. The highest viscosity oils flow best between the chain link plates, filling the pin-bushing areas, providing the best wear life. The following table identifies lubricant viscosity recommended for various temperatures.
20-40 F SAE20 40-100 F SAE30 100-120 F SAE40 120-140 F SAE50