Short-Term Storage Silos for Asphalt Facilities

Maximize production capabilities with an advanced silo system.

Engineered for maximum performance and manufactured for years of reliable service, a short-term silo system is built to provide high efficiency at a low cost. These silos are made to withstand today’s high production requirements and are stacked with features not found on competitive equipment.

System capacities from 100-ton single silos to 3,000-ton multiple silo systems. Custom arrangements can be configured for your requirements.

Features & Benefits

Short-term silos are available in either a 11.5 ft. (3.50 meters) or 12.5 ft. (3.81 meters) diameter of the following capacities:

Capacities are based on 120 lbs/cu. ft. for mix (1.92 metric tons / cu. meter).
Tons 100 150 200 250 300
Metric Tons 91 136 181 227 272

Short-Term Silo
DRAG CONVEYOR

A powered drag conveyor drive system is equipped with a heavy-duty drive chain, segmented sprockets, gear reducer and hydraulically operated take-up assembly.

Drag Conveyor

The drag conveyor, at 50-inches (127 cm) deep and 36.5-inches (90.17 cm) wide, is the largest in the industry with a capacity of up to 750 tph (680 mtph).

Single or double-sided stairways are available. The massive, single-chain arrangement uses A-36 steel flights.

Wear resistant high-chrome flooring with integral side-wall liners offer significant wear resistance. The high-chrome liners are bolted in for easy replacement.

Also includes hydraulically adjusted take-up assemblies, light weight access doors, an all welded U-box frame and floating and fixed idlers.

Heavy-Duty Single Chain

This single-chain arrangement for the main drag is equipped with extra hard rollers, pins, and bushings for increased operational life. Thick, all-welded, reinforced slats decrease maintenance. Optional double chain also available.

Chain Tension Indicator

An exclusive chain tension indicator saves time by letting the operator know when the chain needs to be tightened. This smaller sized roller is positioned so that as the chain stretches and sags the roller will start to turn, indicating that the chain needs to be tightened.

Segmented Sprockets

The drag chain rides on segmented sprockets located at the head shaft. Case hardening gives the sprockets a uniform, hardened wear-surface for a long life while maintaining ductility for severe service.

Each sprocket bolts to a split hub. The sprocket can be replaced one piece at a time without removing the chain, drastically reducing the time and effort required.

Segmented sprockets allow for easy maintenance. For strength and durability, the segmented head sprockets are wear hardened to RC 58/60.

Handrails, Walkways And Decking

OSHA standard handrail, walkway and checker-plate decking are standard on all short-term silos. The integral kick plate on the top deck eliminates spillage down the sides of the silo.

Hydraulically Adjusted Take-Up

The drag conveyor discharges into a traverse conveyor installed atop batchers. The operator selects the silo to be filled, and the traverse empties its contents into the designated silo’s batcher.


Short-Term Silo
TRANSFER CONVEYOR

The transfer conveyor provides years of dependable operation thanks to rugged construction.

Transfer Conveyor

A horizontal traverse conveyor transfers asphalt mix from a drag conveyor or bucket elevator to additional silos. The traverse conveyor is equipped with motors and coupled to in-line, heavy-duty reducers. The traverse conveyor has a strong, all welded, U-box frame that eliminates cracking potential and improves the structural integrity. The main frame, which is fabricated entirely with 3/8” structural steel, consists of unitized sidewalls and subfloor resulting in an extremely high-strength, rigid frame assembly. The heavy-duty chain arrangement includes reinforced flights. High-chrome blend liners protect the floors and sidewalls from wear. A heated floor with insulated heat-covers helps prevent material build-up during start-up and assists in keeping the floor clean. Includes return-run idlers and adjustable take-up assemblies.


Bolt-On Divert Gate

The transfer conveyor includes an exclusive bolt-on divert gate assembly with liners. No more welding gates to shafts inside of the transfer body. The divert gate is easily replaced by simply unbolting the divert gate from the transfer conveyor. This allows replacing the highest wear area on the transfer conveyor without welding or torching and without having to also take the transfer down to the ground. The divert gates are lined with wear resistant plates for added life and have an access door for clean out.


Mix Level Indicators

Each short-term silo has low level and high level indicator rods that extend through the top deck. The design eliminates weak points and allows service of the rods from the deck.

The low and high level indicators measure mix level and communicate that information to the control house. The high level indicator signal prevents overfilling the silo. The low level indicator prevents running the silo completely empty so that when you load from the batcher you are loading onto material rather than the cone.


Batcher With Built-In Splitter

The batcher features a built-in splitter to protect the leading edge of the gate and minimize maintenance. The splitter divides the flow of material as it drops to help reduce segregation.


Short-Term Silo
FEATURES

Short-term silos are built top to bottom with the highest quality materials and loaded with dependable features.

Dual Clam Gates

The dual clam gates on the silo allow for more even and accurate loading.

Safety Gates

Safety gates act as a backup to the clam gates. The safety gates can stop the silo from emptying out on a truck, helping prevent a serious accident.

Reinforced Cone

The reinforced cone includes standard electric heat or optional hot oil heating. Optional ceramic full sheet AR or Hi-Tech premium cone liners are available.

Truck Scales

Heavy-duty, all-welded truck scales provide accurate load-out and quick turnaround times.

Electronic Scales

The optional low profile LPSII truck scale is a totally electronic scale. It only needs small foundation pads at each load cell. Weigh sections have checkered-steel deck plates. The scale is wired in conduit. When a silo is used without a truck scale, Dillman can provide an optional weigh batcher.

Structure Support

Short-term silos feature an all-welded support structure. Heavy-duty steel beam legs, with cross bracing, offer structural integrity for all seismic zones. Steel beam legs are welded on to the silos to reduce set-up time when the silos arrive on site.

Silo Insulation

Industrial-grade insulation maximizes heat retention. 10” of insulation in the top deck and bottom enclosure, plus 5” running the entire length of the silo helps maintain mix temperature.

Heating Blanket

A silicone electric heating blanket surrounds the lower cone section. A thermostat activates the blanket when the temperature drops below a setpoint. This sensor saves money, because the energy to heat the cone is used only when required.


Short-Term Silo
OPTIONAL FEATURES

With a short-term silo, you will have an opportunity to configure your facility with options to better serve your customers and your community.

Blue Smoke Packages

Blue smoke (hydro-carbon vapor) is generated at mix transfer points. Blue smoke is actually a haze of petroleum droplets suspended in the air. The blue smoke collection system prevents the vapor from escaping when asphalt is transferred from the mixer to the storage silo. The blue smoke system captures the vapor and uses a fan to transport it back to the drum where it is incinerated by the burner flame. The result is extremely effective. Virtually no blue smoke escapes into the air during silo filling.

Load-out tunnels and fiberbed mist collectors can also be supplied for installations where environmental compliance is a priority.


Hot Oil Heating System

Optional hot oil heating on cone.


Stand Alone Control Panels

Short-term silos are as well suited to retrofit applications as they are to new plant installations. The optional stand alone control panel is designed to integrate into any brand control system.