NFA Series (45-1,500 CFM)
Standard Pressure Filtration
NEXT’s NFA filtration line protects your plant equipment and processes, improves your product quality and reduces your energy costs. Our top-of-the-line NFA series filters are equipped with all the features required to make this the most efficient and cost-effective filter for your compressed air system. It’s 2-part permeant pressure cast molded aluminum housing that goes through the process of chromo phosphate and externally powder coated. Low pressure drop is achieved through optimal flow path design. The high efficiency bowl and non-turbulent lower filter zone assure that no condensate gets re-entrained in the air stream. The NFA’s seal cannot be opened while the filter is under pressure, offering additional efficiency. The FLOW-STREAM differential pressure gauge notifies maintenance personnel of the optimal point at which to change filter elements. The stop lock feature design allows for easy disassembly and element changeout but also prevents over tightening of the filter body. For our FLOW-STREAM coalescing pre-filter, the added option of our AQUA-PURE drain series assures that no compressed air is lost when liquid condensate is drained
NEXT offers filtration products in an application range from general purpose air to the most stringent food and pharmaceutical applications. Next’s NFA filters are available from 20 to 1500 cfm, @ 232 Psig, and design temperatures of 35 °F (2°C) to 176 °F (80°C)
- Engineered for energy efficiency – helps reduce operating costs
- Durable Housing construction for corrosion resistance
- Broad filtration from general purpose to highly stringent applications
- Optimized air flow design to help increase efficiency and reduce pressure loss
- Built for reliable and easy maintenance
NFA Series Features
- The air filters have four (4) ranges of efficiencies, removing contaminants as small as 0.01 micron at up to 232 psi -1/4″ to 3′ NPT/BSP pipe sizes.
- A protected auto float drain (0.07″ orifice) is standard for optimal and reliable removal of liquid contaminants.
- These air filters have zero-porosity aluminum and durable epoxy powder-coat finish, along with a corrosion resistant internal coating for a long service life.
- Filter combinations are configured to meet specific application requirements.
- Filters comply with pressure Equipment directives and perform as per related Iso 8573 standards.
- Filters are equipped with differential pressure gauges for ease of maintenance and energy efficiency.
- Superior filtration from 1 micron to .01 micron
- Durable element construction
- Efficient drain layer ensures continued performance after optimal element change periods
Max Operating Pressure
- 232 Psig
- 15 Bar
Flow Rates
- 20 – 1,500 SCFM
Connections
- 1/2” NPT TO 3” FLG
Min/Max Operating Temp Range
- 35/212°F
- 2 to 100 °C
Material
- Chromo phosphate Aluminum
ISO air quality class (solids, water, oil)
- ISO Class 8573-1
Certified
- CRN
NFA-Series Range
*Additional Flows Available Upon Request
Correction Factors
Sizing:
Air flow capacity = Operating Pressure x Inlet air Temperature
Correction Sample:
If a compressor delivers 500 scfm at 120 psi pressure with a 120°F inlet temperature, please choose your dryer model as follows:
(500 scfm / 1.08 / .75) =617 scfm, therefore an HDD-600 would be needed.
NFA Elements
Filter Media Designed for Compressed Air
High quality compressed air filtration starts with selecting the correct filter media. Next uses superior-quality filter media with a new hybrid technology. Our elements stop the perpetual discussion about the use of filter media with or without binders because they are layered with body types, tailored to the filtration task. This neutralizes the inherent disadvantages and, as a result, retains the advantages of both types. The fine filter media is protected on both sides using a supporting fabric to increase both the stability and reliability.
Pleated Filter Elements
Pleated filter elements provide significantly greater filtration area than non-pleated. The higher filter area provides more void space for holding contaminants which reduces the differential pressure caused by retention of solid particles. The service life of the filter element increases proportionally which results in operating and maintenance cost savings.
Incorporated Drainage Media
The filter and drainage media are supported between two stainless steel supporting cylinders, eliminating any potential detachment of the filter media. The drainage media is located inside the filter element, eliminating potential handling damage. The stainless-steel cylinders have big, diamond-shaped openings for optimum flow conditions. Compared to punch-hole versions, their contribution to differential pressure is much lower and they are much more environmentally friendly because they are made from expanded sheet metal, i.e. without metal scrap.
Two-stage dry type Separation
During dry-type separation without-to-inside flow through the filter elements, the drainage media functions as a pre-filter stage, preventing coarse contaminants from entering the fine filter media. As a result, the differential pressure caused by contaminants is reduced and the service life of the filter is extended. As an additional advantage, the filter elements can also be used for wet type filtration.
Abrasion-free Activated Carbon Filter with 100% Activated Carbon
Both the filter element type and the cartridge type contain pure activated carbon granulate. The increased filling quantities contribute to a high separation performance and a long service life. Both the elements and the cartridges have an integrated general purpose filter element which significantly reduces the abrasion particles of the activated carbon. As a result, downstream dust filtration is not required, reducing installation, operation and maintenance costs.
Particulate: F and FR Elements
- High Efficiency filters remove particles to 1 micron, including coalesced liquid water and lubricants
- Maximum Remaining aerosol content after filtration 0.5 ppm at 70°F (21°C)
High Efficiency Coalescing: H and HR Elements
- High Efficiency filters remove particles to 1 micron, including coalesced liquid water and lubricants
- Maximum Remaining aerosol content after filtration 0.5 ppm at 70°F (21°C)
Vapor Removal: C Elements
- Filters with activated carbon remove lubricant and hydrocarbon odors
- Remaining vapor content is less than 0.003 ppm (excluding methane)
- This filter installation should always be preceded by high efficiency filter grades
NFA Series Options
The Next condensate drain series, drains without the loss of compressed air and guarantees a secure and economical drainage of condensate for any application.
The sizing of the condensate drains matches perfectly the volume flows and guarantees secure drainage even with higher condensate volumes.
- Electronic Zero Loss Drain
NBM- Series
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- Timer Condensate Drain
NTD- Series
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- External Zero Loss Float Drain
NFD- Series
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Your next step toward working with NEXT Air & Gas is to contact us for a Quote. Fill out the information below and give us the appropriate information needed to get started. Be sure to fill out all the contact information and our team will reach out with any questions or concerns.
If you’d rather speak to Sales Engineering, feel free to contact us at (865) 635-8178.
Below are links to product information and brochures. Please click and download at your convenience. If you have any questions or suggestions on materials you think would be helpful, please call us at (865) 635-8178.
Element Specs
Methods of Filtration
Impact
Particles 1.0 µm and larger collide and adhere to the filter media.
Interception
Particles larger than the filter media pores 0.1-0.3 µm are removed by interception.
Diffusion
Particles 0.3 µm and smaller are removed by diffusion. These smaller particles diffuse from the air / gas stream to the surface of the filter media.
Gravity
Coalescing makes smaller particles into larger particles which fall to the bottom of the filter due to gravity 10 µm and Larger.
Types of Filtration
Water Separation
Large, “heavy”, slow amounts of liquid from a compressed air flow are separated by means of gravitational forces, centrifugal forces, inertial effects, etc. The differential pressure is constant, and a high separation efficiency is guaranteed over the whole specified flow rate range.
Dry Type Filtration
Solid contaminants are separated from the compressed air system. The solids contact the fibers of the filter media where they remain. A coarse and a fine coarse media filter protect the fine filter media, increasing the service life. The differential pressure (dry) increases with an increasing amount of contaminants. The elements can be operated from inside to out or vice versa. The preferred direction of flow is toward the finer filter fibers, i.e. from out-to-in.
Wet Type Filtration
Liquid contaminants from the compressed air flow are separated using a fine multi-layer filter media in combination with a drainage media (coalescing filter). The liquid contaminants contact the fibers of the fine filter media, move along the fibers due to the compressed air flow and form larger droplets when they are merged (coalescing effect). The droplets are absorbed by the drainage media, discharged to the filter element bottom due to gravitational forces, and drop off the filter element.
Theoretically, the differential pressure (wet) is constant. However, it rises as the filter element is continuously loaded with liquid and solid contaminants. The direction of flow is toward the drainage media, i.e. from in-to-out.
Principle of Operation
- Contaminants are introduced at various stages of the air compression cycle. Removing these contaminants is vital to help ensure part quality, avoid machine damage and protect the air stream.
- Compressed air enters the filter housing inlet. The inlet design helps optimize airflow as compressed air moves into the physical medium of a filter element.
- Then, Untreated compressed air passes through filter material designed for retention of particles such as liquid oil, oil aerosols, dirt and scale.
- Finally, the treated, clean compressed air flows down stream to other inline components or point of use.
- Removed condensate moves from the treated air to be easily drained.
Open View
- Differential Pressure Gauge
- O-Ring Bowl Seal
- Diecasting Aluminum Housing Chromated with Polyester Epox
- Powder Coating for Corrosion Resistance
- Large Capacity Reservoir Allows Large Condensate Volume
- Auto Drain
- Drainage Layer
- High Efficiency Filtration Media
- Support Cylinder
Next Air & Gas Performance Advantages
The performance of any desiccant dryer depends on the quality of its key components. Next Air & Gas uses the best available valves, controllers and desiccant. With accurately designed and sized components, the dryers are manufactured to provide you with years of trouble-free operation.
Compact & Light Weight
Advanced housing and element design prove a smaller, more compact and light weight filter which is efficient and easy to maintain.
Differential Pressure Gauge
A high-quality differential pressure indicator is used to identify pressure differential
Stop Lock Design
Stop lock design creates perfect performance seals to ensure efficiency.
Filter Connections
More port sizes are available to match both pipe size and system flow rate,giving additional customer choice.
Fully Corrosion Protected
Chrono phosphate is cast aluminum and powder coated with epoxy finish for full corrosion protection.
Stainless Auto Condensate Drain
Specially designed stainless-steel auto drain system protects from corrosion and other contaminants.
Deep Bed Pleating
For particle and aerosol removal, deep bed pleating provides 450% more filter media than an ordinary element, giving a larger filtration area, lower flow velocities, increased dirt holding capacity, lower running costs and a more compact filter element. Graded density further improves filter life and overall performance.
Next’s Compressed Air & Gas Filtration
The need to effectively and efficiently dry and filter compressed air & gas cannot be overemphasized. Ineffective purification can lead to system and / or equipment damage and product spoilage. Inefficient purification can lead to unnecessarily high operating and maintenance costs.
With over 40 years of compressed air purification experience behind us, Next has developed an extensive line of air / gas filtration products with a range of efficiencies and optional features to cost effectively meet any of your needs. Our pre-filters and post-filters can be configured to suit the requirements of your specific application.
- Dust Particles (from Ambient air and/or desiccant)
- Liquid Water and Moisture Vapor
- Liquid Oil and Oil Vapor
- Hydrocarbon Vapor
- Rust Particles
- Pipe Scale
- Acidic condensates
