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GLOBAL AIR BLASTERS
GW Series
General Use


Performance | Dimensional Data | Selection Guide | Accessories

Air Blaster
G400 Series Air Blaster

Global Air Blasters are blast aerators consisting of a compressed air reservoir with a quick opening valve that releases the stored air in a sudden, high-energy blast. This blast is directed through a discharge pipe to aerate and dislodge material, and restore flow.

In a direct blast Air Blaster the air in the reservoir or tank passes directly into the discharge pipe without bends or obstructions in the air course that impede the flow of air. This is important because the quicker the air discharges, the greater the velocity and force of the blast and, therefore, the greater the amount of material affected.

When used in combination, multiple Air Blasters can restore flow to hundreds, thousands, or millions of cubic feet of material. Air Blasters are activated manually or by a micro-controller based sequencing timer that controls the firing time interval and sequence of one or more Air Blasters.

Applications:

  • Air Blasters are an easy way to solve bulk flow problems in silos, hoppers, chutes, and storage piles. Use Air Blasters where vibration is not practical, other methods are too expensive, dangerous or destructive, or nothing else works. They are commonly used when it is not practical to physically shake stuck material loose. For instance, large concrete bunkers and storage piles on the ground are impossible to vibrate, but are common locations of bulk material flow problems.
  • Air Blasters are recommended for a wide range of material clogs and jams, in hoppers of any size, and are well suited for large structures of any type. They are effective for very cohesive, difficult materials. For instance, wood chips are very difficult to dislodge by other means, but respond very well to the quick-release Air Blaster.
  • Air Blasters are also used to periodically aerate material sitting in bins, hoppers, and silos since their blast will lift and separate the material rather than compact it.

Features:

  • Produces Results Quickly and Efficiently - Quick blast of air permeates the material and dislodges trapped solids.
  • Handles Big Loads - Air blast spreads out in a cone pattern to aerate and loosen a large volume of material at one time. When used in combination, multiple Air Blasters can restore flow to hundreds, thousands, or millions of cubic feet of material.
  • Quiet Operation - Noise of air blast is dampened by the material being aerated.
  • Energy Efficient - Air Blasters have low air consumption since they collect air and are fired intermittently. They require only a small fraction of the air used to operate pneumatic vibrators.
  • Does not Compact Material - Blast of air in the bin aerates the material rather than compacting it.
  • Minimal Maintenance - Single moving part, no springs, no motors, no bearings, make Air Blasters easy to maintain for many years. No lubrication is required.
  • More Powerful Air Blast - Lightweight piston, short piston travel, direct blast design, and aerodynamically designed exhaust windows allow the tank to be emptied more quickly creating a stronger, more productive blast.
  • No Leakage - Piston designed to prevent air loss during blast. Polypropylene piston conforms to the valve seat for a superior seal, preventing air seepage between blasts. Air loss can be a problem in blasters using a metal-to-metal seal.
  • Fills Faster - Standard quick fill port allows tank to fill in less than 60 seconds (2.5" & 4.0" discharge models). This makes rapid repeat firing possible when needed.
  • Longevity - Corrosion, abrasion, and impact resistant piston. Coated valve parts resist acid and basic environments. Piston movement engineered to prevent excessive wear.
  • Ease of Service - All parts individually replaceable. If a part becomes worn or damaged, it is not necessary to replace the entire valve.
  • ASME Certified Pressure Vessels - All details of design, materials, construction, and workmanship of each vessel conforms to the ASME Code for Pressure Vessels, Section VIII, Division 1. Documentation available for each Air Blaster upon request.
  • Five Year Warranty

Options:

  • Reducer Coupling available on GW6 models (6" discharge). Reduces discharge to 4" for use with 4" discharge pipe.
  • Factory Installed Quick Exhaust Valve - GWE models have Global's unique G-Series quick exhaust valve permanently mounted. This patent pending valve was designed specifically for use with Global Air Blasters. It quickly evacuates air from the Air Blaster valve, guaranteeing a full, powerful blast even when the solenoid or 3-way valve is up to 100' from the Air Blaster. The G-Series quick exhaust valve also ensures closure of the Air Blaster valve immediately after the blast. This prevents contamination from entering valve or tank.
  • Stainless Steel models for use in corrosive or "clean" environments. Includes stainless tank, valve body, cap, and seat, polypropylene piston, Teflon encapsulated or silicon o-rings. No lubrication required.
  • Special Paint and other modifications to meet individual applications.

Operating Requirements:

  • Filtered air. No lubrication required.
  • 40-125 PSI.
  • Maximum Ambient Temperature = 130F (55C).

Air Blaster Selection:

Selection of the size and number of Air Blasters is based on the size of the bin, silo, bunker or hopper, and the density and consistency of the material. It is also important to consider the area of influence data to insure full air blast coverage in the problem area. Complete cleaning of the bin wall will require more Air Blasters than simply restoring flow.

GW SERIES AIR BLASTER Selection Guide
AIR BLASTER
MODEL
MATERIAL
TYPE
NUMBER OF AIR BLASTERS_Selection1 RECOMMENDED PER BIN/HOPPER AREA OF
INFLUENCE
DIAMETER OF STRUCTURE
FT 3 5 10 15 20 25 30 35 40 45 50
M 1 1.5 3 4.5 6 8 9 10.6 12 14 15 FT M
2.5" DISCHARGE:
GW2.5-8-24 I   1 3 6 9 12 15 18 21 24 27 30 4 1.2
II   1 2 3 5 6 7 8 10 12 13 15 7 2.1
4.0" DISCHARGE:
GW4-12-28 I   * 3 4 6 10 12 14 16 18 20 25 6 1.8
II   * 2 3 4 5 6 7 8 10 11 12 9 2.7
GW4-20-30 I   * 2 4 6 8 10 11 12 15 16 18 7 2.1
II   * 1 2 3 4 5 6 7 8 9 10 10 3.0
6.0" DISCHARGE:
GW6-24-48 I   * 2 3 5 6 8 9 10 12 14 16 8 2.4
II   * 1 2 3 4 5 6 7 8 9 10 12 3.7
GW6-30-60 I   * 1 2 3 4 5 7 10 10 11 12 10 3.0
II   * 1 1 2 2 2 2 3 4 5 5 16 4.9

* Not suitable - too large for application.

TYPE I MATERIAL: These are solids that weigh more than 55 lb/ft3 (881 kg/m3), have mixed size or large chunks, tend to cling regardless of weight, or have a pasty or greasy consistency.

TYPE II MATERIAL: These are solids that weigh less than 55 lb/ft3 (881 kg/m3), are dry and powdery, do not compact or cling during storage, and flow easily under most conditions.

Accessories:

  • Manual Valves - 2-way manual ball valves, used to control the air supply to the Air Blasters and 3-way manual ball valves for manual firing of the Air Blasters.
  • Solenoid Valves - 3-way normally open solenoid valves for automated firing of the Air Blasters.
  • Airline Kits - Recommended for trouble-free operation and long life of Air Blasters. Includes airline filter and pressure regulator with gauge. Either standard or auto-drain models available.
  • Airline Check Valves - Used to prevent accidental firing of Air Blaster if air supply problem causes pressure to drop in Air Blaster fill line.
  • Quick Exhaust Valve - This patent pending valve was designed specifically for use with Global Air Blasters. It quickly evacuates air from the Air Blaster valve, guaranteeing a full, powerful blast even when the solenoid or 3-way valve is up to 100' from the Air Blaster. This valve increases the blast force by as much as 20% compared to other quick exhaust valves or a tank mounted solenoid. The G-Series quick exhaust valve also insures closure of the Air Blaster valve immediately after the blast. This prevents contamination from entering valve or tank.
  • Tangential Mount Discharge Assemblies - Directs air blast downward and along the bin wall. Tangentially directed blast, a process patented by Global Manufacturing, is the most effective way to clear material sticking to the bin walls. Assembly includes mount plate, discharge pipe, mount flange, gasket, and hardware. Available in weld-on and bolt-on versions.
  • Mount Hardware Kits - Straps and hardware for supporting tanks when bin wall strength is not adequate.
  • Blaster Master Timer - A micro-controller based sequencing timer used to control the firing time interval and sequence of one or more Air Blasters.
  • Safety Cable Kits - Includes anchor ring and 14 feet of cable.
GW SERIES AIR BLASTER Accessories
AIR BLASTER
MODEL
Inlet
Port Size
3-Way Valve
or 3-Way N/O
Solenoid
NO QEV USED*
3-Way Valve
or 3-Way N/O
Solenoid
WHEN QEV USED
Quick Exhaust
Valve (QEV)***
Tangential
Mount
Discharge
Assembly
Tank Mount
Hardware
Safety
Cable Kit
2.5" DISCHARGE:
GW2.5-8-24 3/4" 3/4" NPT 3/4" NPT 3/4" or 1" QEV 2T60-20 TMH-08 AB-14
4.0" DISCHARGE:
GW4-12-28 3/4" 3/4" NPT 3/4" NPT 1" QEV 4T60-20 TMH-12 AB-14
GW4-20-30 3/4" 3/4" NPT 3/4" NPT 1" QEV 4T60-20 TMH-20*** AB-14
6.0" DISCHARGE:
GW6-24-48 1"**** 1" NPT 3/4" NPT 1" QEV 6T60-20 TMH-24*** AB-14
GW6-30-60 1"**** 1" NPT 3/4" NPT 1" QEV 6T60-20 TMH-30*** AB-14

* When no Quick Exhaust Valve is used, mount the 3-Way Control Valve within 10' of the Air Blaster for optimum performance.

** Our patent pending 1 Quick Exhaust Valve can be ordered separately. 4 & 6 GWE models include factory installed Quick Exhaust Valve.

*** Two sets of Mount Hardware required for this Air Blaster size.

**** 3/4" Inlet Port for GWE model that has factory installed 1" Quick Exhaust Valve.



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