The Ultimate Buyer's Guide for Purchasing vibrating screen feeder

Portable screening plants are a major part of the business for aggregate producers.

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From small, highly customized design modifications to the overall type and size, there are a multitude of factors operators must consider. Selecting the right screening plant takes time, research and clearly outlined goals for the operation. Here are six things to keep in mind:

1. Operators should analyze everything from output capacities to business goals before making a purchase. Among the very first things to do is size the equipment to match the operation. Understanding the application and materials will help determine the ideal production, capacity and number of end-size products.

Next, fully understand the company&#;s goals and projected sales to determine what size screen is needed. For example, if an operation can sell 500,000 tpy, its screens need to sort nearly 42,000 tons per month. If the screen is in operation two days a week (about eight days each month), 10 hours each day, the operation will require a machine capable of screening around 525 tph. 

2. Scalping and screening have several main differences. Standard screens are often considered finishing screens because they&#;re capable of producing specific-sized end products. Operators can adjust the speed of the feeder belt to help produce a clean, sized, finished product. These units typically have two or three screen decks and are ideal for use in sand and gravel pits, on asphalt jobs and in quarries.

Scalping plants, meanwhile, are built to handle the toughest materials but are not as precise as standard screening plants. Material is fed directly onto the screen. Scalpers are ideal for sorting materials before crushing and processing scrap metals and recyclables.

3. Hopper size is typically 12 ft. wide with an option to upgrade to 14 ft. wide. Those extra 2 ft. can capture more product and prevent spillage. The size of the hopper is perhaps most pertinent when pairing the screener with the loading machine, especially when using a large wheel loader.

4. A tipping grid or live head can be added to a screening plant above the hopper for additional sizing. A tipping grid is essentially a hinged grid that blocks larger materials from entering the hopper. This is an affordable option but it can become a chore &#; particularly in wet or dirty applications where the tipping grid may become plugged frequently.

A live head is essentially a vibrating screen that attaches to the hopper and is ideal for heavy-duty, dirty, wet and sticky applications. The unit can be used to scalp dirty material off and eliminate the need for manual cleaning, or to size material going into the machine so operators can produce an additional sized product.

5. Apron feeder versus belt feeder is another element to evaluate, as different products vary in durability. The standard belt feeder is perfect for sand and gravel operations, but it is likely to tear or break when working with metal, large rock or extremely abrasive material. An apron feeder, which is essentially a belt made of metal, is durable and can handle nearly anything operators throws at it.

6. Stockpiling offers little mystery. The higher the stockpile, the more time operators will save because they&#;ll run for longer periods without having to move material.

Information for this article adopted from Pit & Quarry University.  

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When it comes to handling dry or semi-dry bulk material, there are few means to transport the material from point A to point B. The common options are pneumatic conveying equipment, frequently dense or dilute phase, belt conveyors, screw augers or vibratory feeders, flat pan style, or enclosed tube style. There certainly is a time and place for each of these options but we will focus on the vibratory feeder design.

Companies looking to make a buying decision on which type of equipment to install that will handle the material typically turn to the vibratory feeders that are powered by a pneumatic or air piston vibrator for one of, or a combination of, these reasons:

Air Powered Feeders Work Well Within a Budget &#; First, and maybe most importantly, the purchase price. The air-powered vibratory feeders can be the low-cost alternative to the electromechanical or electromagnetic powered vibratory feeders. The biggest cost savings can come directly from the vibratory drive or mechanism and the vibratory controls. Electromechanical feeders typically have two vibratory motors while the electromagnetic feeders typically have one large vibratory drive attached. Each of these electric-powered options requires an electrical control box, with dual thermal overload protection for the electromechanical vibratory motors for on/off operation, speed control, or intensity of the vibration control. In contrast, the air-powered feeders are driven by a single non-impacting piston. For example, the Cleveland Vibrator VMSAC units are either controlled by a manual ball valve or 2-way, normally closed, solenoid valve.

They Have an Explosion Proof Design &#; Another reason why the air-powered units are installed is that the non-impacting piston vibrators are deemed intrinsically safe and acceptable for operation in hazardous duty. Without the impact of the piston nor any electrical components, these units can be used in all areas, including the dusty ones.

They Instantly Start and Stop Material Flow &#; Lastly, the pneumatic powered vibrators can start or stop instantly. Why is this important? This helps when trying to properly meter the correct amount of material in a package or add the appropriate amount of product into the mixer for production processing. Here is a short YouTube video to further explain what I am talking about. The key is the type and location of the valve. A quick acting valve, like a ball valve, allows for the quick burst of air to reach the vibrator. If this valve is located close to the vibrator, within 5 feet or so, the piston inside the vibrator will start and stop as soon as the air is turned on or off.

However, it is important to note, that there are some restrictions in terms of size (length and width) or capacity (tons per hour) that the air-powered feeders can handle. Want to know if the air-powered vibratory feeder design is appropriate for your application? Contact the Cleveland Vibrator team for help!

Mike joined The Cleveland Vibrator Company team in with prior experience in manufacturing sales with a Cleveland company in the tool and die industry. Now, he&#;s the Director of Sales and specializes in &#;making stuff that shakes stuff&#;.

When he&#;s not immersed in the world of industrial vibration, as rare as that might be, Mike keeps busy *not finishing in last place* in Fantasy Football and enjoys spending time with his wife and three kids. It&#;s always golf season for Mike, and he&#;s been known to 3 putt his way around any course and can roll tee balls in rain or shine. You can find him tailgating in the Muni Lot before Browns games or supporting local breweries.

As an avid provider of #VibrationEducation, he offers this free bit of advice, &#;Not all vibration is the same. Force and frequency do matter!&#; However, there is a 2% upcharge for all Michigan and Steeler&#;s fans.

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