Dollinger Air Intake Filters

Contaminants at the intake of compressors, blowers and turbines dramatically affect the cost of supplying compressed air. Inefficient intake filtration permits contaminants to corrode, erode and foul internals. Dollinger air intake filters will deliver optimum performance, energy savings and protection to gain long component service life.

AI-128-V Two Stage

The Need.  Contaminants at the intake of compressors, blowers and turbines dramatically affect the cost of supplying compressed air.  Inefficient intake filtration permits contaminants to corrode, erode and foul internals, effecting a reduction in performance and component service life. Contamination increases repair, maintenance and downtime of rotating equipment. Contaminants not effectively removed by the air intake filter will also migrate downstream in compressed air piping, to system controls, instrumentation, tools and other production processes.

Manufacturing facilities worldwide are experiencing escalating maintenance costs, increasing at an average rate of 10% to 17% annually. These increases are in addition to the related costs associated with downtime, rejects and rework of production process.

For “world class” competitiveness, today’s industrial strategies must include management of the high cost of process intake contamination.

Housing Design and Construction.  The rigid, all weather galvannealed housing of the AI-128-V provides strength and corrosion resistant protection on outdoor installations. All surfaces are finished with a coat of blue hammertone enamel for long life and durability. Weatherhoods are provided as standard equipment. All metal joints of the AI-128-V are welded and caulked as required to prevent dust from entering the unit. The standard conical safety screen over the filter outlet prevents small foreign objects from entering the exposed air intake passage when servicing or replacing panel elements. A ¼” pressure tap attachment is standard on each housing for ease of installation.

Silencing for reduction of air and equipment noise is standard on the AI-128-V, providing sound attenuation up to 17.5 dB(A). The filter housing may also be modified or customized to meet special application needs.

Element Design and Construction 

Prefilter Element . The primary panel element incorporates a pleated media design which provides optimum filtration area with minimum pressure loss and large dirt holding capacity. An electrogalvanized steel frame and synthetic fiber filter medium combine to make the element cleanable and reusable. A rugged metal frame and wire mesh guards on the element face provide added durability and ensure against rough handling and moisture.

Each panel element of the AI-128-V can handle flow rates of 3000 SCFM and provide 99% retention efficiency of 10 microns. After extended use, the elements may be cleaned with a mild detergent solution.

The prefilter may be washed by low pressure water hose (<30 psi), properly dried and reused with good results.

Final Stage Element. The final stage TURBO KLEENT multiple Vee panel designs place eight (8) panels in a “Vee Formation” within a nominal 24″ x 24″ x 11 – ½ ” standard size. A proprietary water resistant microglass media presents a “dual-layer” barrier to particles which penetrate the prefilters.An extruded polymeric frame encases the eight (8) panels which are totally sealed in the TURBO KLEEN.

The Features and Benefits of AI-128-V Two Stage are: 
Superior Performance. 99.97% removal at 2 microns and over 90% removal at 0.4 microns to protect the performance and life of rotating equipment.

Extended Element Life. More available surface area with the TURBO KLEEN design doubles dirt holding capability, extending element life and reducing element replacement costs.

Sizing Flexibility. The TURBO KLEEN is capable of flowing up to 3000 SCFM rather than the standard 2500 SCFM. That is a 20% increase in capacity without penalty of added pressure drop. This sizing flexibility allows for a smaller housing and lower first cost.

Available Options. When desired, special options and accessories are also available. These include; Flange adapters; Top and side outlet designs; Pipe leg supports; Differential pressure gauges; Stainless Steel and Aluminum housing construction; Anti-icing packages; Special finishes to customer required standards. Elements with lower micron ratings and/or higher efficiency ratings are also available.

AI-187 Single Stage

The Dollinger AI-187 single stage air intake filter is designed to efficiently and economically remove dust, dirt and other airborne contaminants from the atmosphere in a single stage panel filter element protecting diesel and gas engines, blowers, axial compressors and small turbines and, at the same time, reducing inlet noise.

Dollinger manufactures 18 standard models, available with ranges from 3000 to 72,000 SCFM and bottom outlets ranging in size from 6″ to 36″ in diameter. The optional silencing feature provides sound attenuation up to 16 dB(A).

Housing Design and Construction. The rigid, all weather galvannealed housing of the AI-187 provides strength of the AI-187 provides strength and corrosion resistant protection on outdoor installations. All surfaces are finished with a coat of blue hammertone enamel for long life and durability. Weatherhoods are provided as standard equipment.

All metal joints of the AI-187 are welded and caulked as required to prevent dust from entering the unit. The standard conical safety screen over the filter outlet prevents small foreign objects from entering the exposed air intake passage when servicing or replacing panel elements. A ¼” pressure tap attachment is standard on each housing for ease of installation.

The filter housing may also be modified or customized to meet special application needs.

Element Design and Construction. The single-panel element design of the Dollinger AI-187 provides clean air with low pressure loss and high efficiency. No special tools or parts are required to replace or service Dollinger panel elements. A pull strap provided across the face of each element allows fast and simple change out.

The panel element incorporates a pleated media design which provides optimum filtration area with minimum pressure loss and large dirt holding capacity. An electrogalvanized steel frame and synthetic fiber filter medium combine to make the element cleanable and reusable. A rugged metal frame and wire mesh guards on the element face provide added durability and ensure against rough handling and moisture.

Each panel element of the AI-187 can handle flow rates of 3000 SCFM and provide 99% retention efficiency of 10 microns. After extended use, the elements may be cleaned with a mild detergent solution.

Available Options . When desired, special options and accessories are also available. These include: Silencing for reduction of air and equipment noise, providing sound attenuation up to 16 dB(A); Flange adapters; Top and side outlet designs; Pipe leg supports; Differential pressure gauges; Stainless Steel and Aluminum housing construction; Anti-icing packages; Special finishes to customer required standards. Elements with lower micron ratings and/or higher efficiency ratings are also available.

Panel Filter Element – Element Design Specifications

• Element is panel type, 24″ x 24″ x 2″ nominal.
• Each panel is nominal rated capacity of 3000 SCFM of air.
• Each panel incorporates extended surface medium.
• Efficiency to be 99% of 10 microns.
• Panel is be cleanable type using compressed air or washing with soap and water or mild detergent or shaking by hand.
• Wire screen is installed on upstream face of panel element, expanded metal on downstream face.
• Plastic strap across face of panel for easy removal.

Element Material Specifications

• Panel frame is galvanized.
• Galvanized material is used on upstream face of panel element.
• Medium is polyester.

Wt. = 11 lbs. Each 
Tests were conducted in accordance with ASHRAE Standard 52-76 in the Dollinger Research and Development Lab Facility.

Pulse Jet

Pulse Jet air filter cartridge for use as final filter for protecting rotating machinery (eg. compressor, gas turbine, diesel engine). Made from the highest quality materials and designed to pass the stringent requirements of international standards and specifications. 

WITH NANO-FIBER PROTECTION.  A major step forward in technology, ensures that these filter elements have the capacity for extended life and lower pressure drop.

By incorporating ultra-fine fibers in the media, smaller dust particles do not penetrate as far into the filter matrix. Very small particles are often responsible for the premature blocking of a filter element. The pulsing action then finds it easier to dislodge these fine particles and ensures that the filter lasts longer.

In addition, the efficiency of the filter is higher than standard elements. This ensures that less dust reaches the turbine and so helps to extend the maintenance period.

• Cylindrical design
• Nano-fibers media
• Improved resistance to humidity
• Low initial pressure drop – high initial efficiency
• Robust construction – extends the working life
• Very high resistance to burst and compressed air pulsing
• Classification MERV 16

SonicFlow

Providing the maximum protection from the finest dust, Sonic Flow final air filters have been selected by turbine operators across the world.

Filter Construction

The filter frame is a 100% polymeric and lightweight design that’s totally corrosion resistant and disposable by incineration and the pre-mounted, seamless gasket creates a positive seal for superior leak prevention.

Features and Benefits

• Improves Efficiency & Fuel Savings
• Ultra High Efficiency ASHRAE Media
• Maximum Dust-holding Capacity for Extended Life
• Rugged, High Burst Pressure Design
• High efficiency ASHRAE tested media maximizes turbine output by removing microscopic particles which can foul stators and other vital turbine components.
• Strong reinforced glass fiber media guarantees reliable filtration, even under high velocity and turbulent operating conditions, with no media shedding.
• A highly permeable filter media that operates at low pressure drops resulting in improved turbine performance and fuel efficiency.
• The SonicFlow™ media features a graded pore structure, which maximizes dust-holding capacity and extends the time between filter changes, even under high dirt loading conditions.
• The SonicFlow™ media is fully potted to the frame creating a strong, high burst pressure design capable of operating under the most severe flow conditions.

Spin Filter Systems

These systems are designed to beat tough contaminants like fly ash, soot, dust, sand, grit, saw-dust, rain and snow and operate continuously. They provide clean, smooth air flow in a wide variety of hostile environments and conditions – even sandstorms and volcanic fallout. 

All smooth-flow compressor and blower installations can benefit from the performance and economy of a multi-stage StayNew® Spin Filter System.

Their self-cleaning feature makes these systems ideal for locations where heavy contaminant loading is a problem for air intake filtration. Their strong corrosion-resistant construction means you can install them in locations where conventional filters are not suitable.

Dollinger has designed these systems to help you cut costs with pre-engineered, modular units to fit most applications. We can also custom design units with a large selection of accessories and options.

Examples of installations include:

• Two single-stage StayNew® Spin Filter Banks, each rated at 42,270 SCFM capacity, at a fertilizer plant.
• Two 3-stage StayNew® Spin Filter Systems, each with an 11,630 SCFM capacity, at an electric utility plant.
• A single-stage filter assembly with 13,750 SCFM capacity, in the carpenter shop of a forest products laboratory.
• Five special 3-stage systems, each rated at 510 SCFM, at a sewage treatment plant
• Three 3-stage systems, rated capacity 21,135 SCFM each, at a coal-fired utility.
• A 3-stage system with an 11,630 SCFM capacity, at a power station.
• A 2-stage system with a working capacity of 79,260 SCFM at an Enhanced Oil Recovery facility.

Spin Filter Module 
The Dollinger StayNew® Spin Module, which is the heart of the StayNew® Spin Filter System, is a compact mechanical separator which can be used independently or in combination with secondary filter elements in a variety of air filtration systems. It is designed to conquer tough contaminants, providing clean, smooth air flow in a range of applications and conditions. 

The self-cleaning feature makes it ideal for locations where heavy contaminant loading is a problem for conventional air-intake filtration. The strong corrosion resistant construction means the StayNew® Spin Filter Module can be installed in hostile environments.

In addition, it is unaffected by wide ambient temperature variations – maintaining stability and operational integrity from – 40°F to + 200°F. The StayNew® Spin Filter Module is also safe for food service and has received FDA clearance for food contact use (21 CFR 177.1520).

By greatly reducing dirt loading on secondary filter elements in a system, the StayNew® Spin Filter Module provides long-term economies by extending the service life of an air-intake system. Used alone, it removes 98% of solid particles 15 microns and larger from an air stream. In addition, it will remove up to 99.4% of moisture, whether in the form of liquid mist or snow.

The standard StayNew® Spin Filter Module, VE-616-1220, is a twin module. Nominally rated at 1,450 SCFM, it can successfully accommodate flow rates up to 2,800 SCFM. The compact, lightweight, modular construction of the unit allows for multiples to be combined readily in a package to handle the most demanding requirements.

Also available for special applications is a single module, VE-616-1210, The rated capacity of the smaller units is 725 SCFM.

Design and Construction
The standard StayNew® Spin Filter Module is mold-formed of rugged, high-density polypropylene. Through centrifugal force, contaminants are removed from the air stream as it is drawn through tubes. The StayNew® Spin Filter Module’s remarkable efficiency is the culmination of years of engineering design, laboratory developments and field testing. 

Efficient Operation
Air enters inlet tube, striking stationary spinner and developing high radial velocity.

Inertial action forces contaminants to the periphery of the tube, separating them from the main air stream.

Main air stream, now cleaned, exits straight through the center discharge tube. Contaminants are carried by a secondary discharge stream into a bleed duct system. A blower is used to provide suction for the bleed air (approx. 10% of the inlet flow). 

TURBO KLEEN™ MVP-6020-2424-518

As the pioneer in air intake filtration, Dollinger continues to solve the most demanding filtration problems for industry. Turbo machinery is precision engineered to survive and perform in some of the most hostile environments in the world.

Each machine is custom engineered to extract maximum performance out of every kilowatt of energy they consume. Precision balanced shafts and impellers rotate at speeds of up to 70,000 revolutions per minute. At that kind of speed, otherwise harmless drops of water or grains of sand can cause catastrophic results. Quality filtration offers protection that can’t be beat.

Contaminant removal specifications speak in terms of microns. The deeper the pleats, the more surface area there is to extracted and contain contaminants. The longer between filter panel changes, the better the productivity of the machine and the lower the cost of operation.

That is why the world’s leading manufacturers continue to rely on high-efficiency Dollinger filtration products like TURBO KLEEN. The TURBO KLEEN filter represents our latest innovation in contamination protection for your high-speed turbo machinery.