NFX Series (45-1,500 CFM)
Standard Pressure Filtration
NEXT’s NFX filtration line protects your plant equipment and processes, improves your product quality, and reduces your energy costs. Our NFX 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 a 2-part permeant pressure cast molded aluminum housing; that goes through the process of anodizing 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 NFX differential pressure gauge notifies maintenance personnel of the optimal point at which to change filter elements. The added option of our AQUA-PURE electronic 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 NFX filters are available from 45 to 1500 cfm, @ 290 Psig, and design temperatures of 35 °F (2°C) to 350 °F (177°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
The Next range of compressed air filters is designed from the outset to meet current and forthcoming requirements for compressed air quality. Using aerospace technology, Next has optimized the flow path through the housing and element, significantly reducing air turbulence and pressure losses. Providing an optimal flow path is key to reducing pressure drop and system operating costs.
NFX Series Features
- The air filters have four (5) ranges of efficiencies, removing contaminants as small as 0.01 micron at up to 290 psi -1/2″ 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
- 290 Psig
- 19.9 Bar
Flow Rates
- 45 – 1,500 SCFM
Connections
- 1/2” NPT TO 3” FLG
Min/Max Operating Temp Range
- 35 to 250°F / 1.5 to 121°C
- 350°F / 176°C (FRHT- High Temp)
Material
- Anodized Aluminum
ISO air quality class (solids, water, oil)
- ISO Class 8573-1
Certified
- CRN
NFX-Series Range
For maximum flow rate, multiply model flow rate by the corresponding working pressure correction factor.
Correction Sample:
If a compressor delivers 500 scfm at 160 psi please choose your filter model as follows: (500 scfm / 1.25) = 400 scfm, Therefore a NFX-475 would be needed.
NFX Elements
Particulate: F and FR Elements
- High Efficiency filters remove particles to 0.1 micron, including coalesced liquid water and lubricants
- Maximum Remaining aerosol content after filtration 0.5ppm at 70°F (21°C)
Particulate: F and FR Elements
- High Efficiency filters remove particles to 0.1 micron, including coalesced liquid water and lubricants
- Maximum Remaining aerosol content after filtration 0.5ppm at 70°F (21°C)
High Efficiency Coalescing: H and HR Elements
- Maximum filtration to remove particulate down to 0.01 micron, including water and oil aerosols. Maximum remaining oil aerosol content of 0.01 ppm at 70°F (21°C), when used with Sullair particulate filters.
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
High Temperature: FRHT & HT Element
- Filters are available for temperatures up to 350°F (176.6°C)
- HRT- High efficiency high temp coalescing filter elements.
- FRHT- High efficiency particulate filter elements.
Ultra Filter: U Element
- For sensitive and high-end applications including pharmaceutical grade, Next offers the Ultra Filter, an absolute high efficiency particulate filter. (0.01 Micron Absolute)
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.
NFX 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
Paired Image Link
- Timer Condensate Drain
NTD- Series
Paired Image Link
- External Zero Loss Float Drain
NFD- Series
Paired Image Link
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.
Oil Vapor Absorbtion
Compressed air flow oil vapors are absorbed by activated carbon. The air becomes virtually oil-free which cannot condense into a liquid anymore. There is often a filter media downstream of the activated carbon in order to eliminate activated carbon abrasion particles (abrasion-free activated carbon filter). The differential pressure (dry) is constant. The direction of flow is always toward the media, i.e. from in-to-out. Liquid oil or water would dramatically reduce the retention capacity of the activated carbon for oil vapor and should, therefore, be separated in advance using appropriate grade filters.
Open View
- High Quality O-ring for maximum sealing and thread protection.
- PVC impregnated outer foam favors water and oil drainage-best solution for coalescing filters.
- Color coded elements for easy identification.
- End cap key fit design ensures position for maximum performance.
- Anodized surface for maximum corrosion resistance.
- Reduces risk of damage during maintenance.
- Differential pressure indicator.
- Flow distribution elbow.
- Stainless steel “Fluted” Helix design inner core.
- Specially designed inner ribs to avoid turbulence which reduces the risk of water and oil droplets passing to the air outlet.
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.
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.
Pleated Element Design
1. Deep pleating enables a lower pressure drop.
2. Supreme collapse resistance due to strength of fluted stainless tube design protecting provides strength against pressure drops while improving the performance by passing air diagonally through the element.
3. PVC impregnated foam assists Water/Oil drainage.
Series Integration
Head Clamping provides serial connection of filters without any extra piping.
Zero Clearance
A Major innovation is the use of a zero-clearance design.
Provides for a simple element change without usage of tools.
Corrosion Resistance
Anodizing proves supreme corrosion resistance. Anodized surface treatment is proven to be better than other surface treatment methods such as Alo-chrome coating.
Drainage Ribs
Anodizing proves supreme corrosion resistance. Anodized surface treatment is proven to be better than other surface treatment methods such as Alo-chrome coating.
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.
DP-GAUGE
A high-quality differential pressure indicator is used to identify pressure differential.
Recessed Float Drain
A specially designed auto drain system protects the auto drain against damage during shipping, handling and installation.
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
The Price of Ineffective and Inefficient Filtration
