Description
Tsunami 20 CFM 2-Stage Membrane Air Dryer, PN: 21999-0357
Short Product Description
The Tsunami 21999-0357 20 CFM 2-Stage Membrane Air Dryer delivers clean, dry compressed air without electricity, refrigerant, or complicated controls. Designed for point-of-use applications, this compact system combines a 50 Series water separator, oil coalescing filter, membrane dryer, automatic float drains, and outlet regulator into one complete package.
With dew point suppression of up to 140°F and relative humidity levels as low as 0.01% RH, the 21999-0357 is an excellent solution for applications where dependable moisture removal and high-quality compressed air are critical.
Full Product Description
The Tsunami 21999-0357 Membrane Air Dryer uses simple, proven membrane drying technology to remove water vapor from compressed air without requiring electrical power.
Compressed air first passes through Tsunami's integrated 2-stage pre-filtration system. The water separator removes bulk liquid water and contaminants, while the oil coalescing filter removes fine oil aerosols and particulates down to 0.01 micron before the compressed air reaches the membrane.
Inside the membrane dryer, compressed air passes through specially designed hollow-fiber tubes. Water vapor migrates through microscopic pores in the membrane while the compressed air continues through the fibers. A small amount of dry sweep air carries the separated water vapor out of the dryer housing.
The result is consistently dry compressed air with no refrigerant system, electrical connection, moving dryer components, or desiccant to regenerate.
The 21999-0357 is rated for 20 CFM, features 1/2" NPT connections, and can operate at pressures up to 175 PSI.
Key Features
- 20 CFM maximum flow capacity
- 2-stage pre-filtration system
- Integrated Tsunami water separator
- Integrated Tsunami oil coalescing filter
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Filtration down to 0.01 micron
- Automatic float drains
- Integrated outlet pressure regulator
- No electricity required
- No refrigerant required
- No refrigerated dryer compressor or condenser
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Dew point suppression up to 140°F
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Relative humidity as low as 0.01% RH
- Replaceable membrane dryer core
- Compact wall-mount design
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Maximum operating pressure: 175 PSI
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Maximum inlet temperature: 100°F
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1/2" NPT connections
Benefits
Dry Air Without Electricity
The membrane drying process requires no electrical power, making the 21999-0357 an excellent choice for remote installations, point-of-use applications, and locations where adding electrical service is inconvenient or expensive.
Excellent Moisture Removal
Tsunami membrane technology provides dew point suppression of up to 140°F, helping protect pneumatic equipment, finishes, processes, and downstream components from moisture-related problems.
Built-In Pre-Filtration
The integrated water separator and oil coalescing filter protect the membrane from liquid water, oil aerosols, and contamination.
Low Maintenance
There are no refrigeration components, electrical controls, refrigerant circuits, or regenerating desiccant beds to maintain.
Serviceable Design
The filtration components and membrane dryer core are replaceable, allowing routine service without replacing the complete dryer assembly.
Best For / Typical Applications
The Tsunami 21999-0357 is an excellent choice for:
- Automotive repair shops
- Automotive refinishing
- Paint and spray applications
- CNC machines
- Plasma cutting
- Manufacturing equipment
- Pneumatic controls
- Packaging equipment
- Machine shops
- Air-operated tools
- Instrument air
- Point-of-use compressed air drying
- Applications without convenient electrical power
- Applications requiring very low compressed-air humidity
Technical Specifications
| Specification |
Rating |
| Manufacturer |
Tsunami Compressed Air Solutions |
| Part Number |
21999-0357 |
| Dryer Type |
Membrane |
| Maximum Flow |
20 CFM |
| Pre-Filtration |
2-Stage |
| Filtration |
Down to 0.01 Micron |
| Connection Size |
1/2" NPT |
| Drain Type |
Automatic Float |
| Maximum Operating Pressure |
175 PSI |
| Maximum Inlet Temperature |
100°F |
| Power Requirement |
None |
| Outlet Regulator |
Included |
| Weight |
16.5 lbs |
| Dimensions |
23" H x 20" W x 4.5" D |
| Dew Point Suppression |
Up to 140°F |
| Relative Humidity |
As Low as 0.01% RH |
2-Stage Pre-Filtration
Proper filtration is critical to membrane dryer performance. The 21999-0357 includes Tsunami 50 Series pre-filtration before the membrane dryer.
Stage 1 – Water Separator
The first stage removes bulk liquid water and larger contaminants from the compressed air stream before they can reach the downstream coalescing filter and membrane.
Stage 2 – Oil Coalescing Filter
The second stage removes fine oil aerosols and particulates down to 0.01 micron, providing the clean compressed air necessary for proper membrane performance.
Both filtration stages incorporate automatic float drains to discharge accumulated condensate.
Replacement Filters & Membrane Dryer Core
Keeping the pre-filters properly serviced is important for maintaining airflow, air quality, and membrane life.
Water Separator Service Kit
Tsunami PN: 21999-0227
50 Series Water Separator Service Kit.
Includes replacement internal components required to service the water separator.
Oil Coalescing Filter Service Kit
Tsunami PN: 21999-0202
50 Series Oil Coalescing Filter Service Kit.
Includes the replacement oil coalescing filter element and associated service components.
Membrane Dryer Core Replacement
Tsunami PN: 21999-0355
Replacement membrane dryer core for the Tsunami 21999-0357.
The membrane core can be replaced independently of the complete dryer assembly, helping extend the useful life of the system.
Recommended Replacement / Service Parts:
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21999-0227 – 50 Series Water Separator Service Kit
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21999-0202 – 50 Series Oil Coalescing Filter Service Kit
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21999-0355 – Membrane Dryer Core Replacement
How the Tsunami Membrane Dryer Works
- Compressed air enters the pre-filtration system.
- The water separator removes bulk liquid water and contamination.
- The oil coalescing filter removes fine oil aerosols and particulates before the air reaches the membrane.
- Compressed air travels through microscopic hollow-fiber membrane tubes.
- Water vapor passes through the membrane walls while the compressed air continues through the fibers.
- A controlled amount of dry sweep air travels around the outside of the membrane fibers.
- The sweep air carries water vapor out of the dryer housing.
- Clean, dry compressed air exits through the outlet regulator and continues downstream to the application.
Why Choose the Tsunami 21999-0357?
The Tsunami 21999-0357 is an excellent alternative to traditional refrigerated or desiccant drying systems when a compact, low-maintenance point-of-use dryer is needed.
Its combination of 20 CFM capacity, 2-stage filtration, membrane drying technology, automatic drains, and an outlet regulator creates a complete compressed air treatment package in a relatively small footprint.
Because the dryer requires no electricity, installation can also be considerably simpler in applications where electrical service is limited or unavailable.
Why Buy from Compressed Air Advisors Online?
Compressed Air Advisors Online specializes in compressed air equipment and air treatment solutions for industrial, automotive, manufacturing, and commercial applications.
When you purchase from us, you get more than a box shipped to your door. Our team can help you determine whether the dryer is properly sized for your compressor, airflow requirements, operating pressure, and application.
- Compressed air equipment specialists
- Expert product sizing assistance
- Nationwide shipping
- Genuine Tsunami equipment and replacement parts
- Replacement filters and dryer components available
- Technical product support before and after the sale
Have questions about whether the Tsunami 21999-0357 is right for your application? Contact Compressed Air Advisors Online and we'll help you select the proper compressed air dryer for your system.
Frequently Asked Questions
How much air can the Tsunami 21999-0357 handle?
The Tsunami 21999-0357 is rated for a maximum compressed air flow of 20 CFM.
Does the 21999-0357 require electricity?
No. The membrane dryer operates using compressed air pressure and requires no electrical connection.
What size connections does the 21999-0357 use?
The dryer uses 1/2" NPT inlet and outlet connections.
What is the maximum operating pressure?
The maximum rated operating pressure is 175 PSI.
Does the dryer include filtration?
Yes. The 21999-0357 includes 2-stage pre-filtration consisting of a water separator and oil coalescing filter.
What is the replacement oil coalescing filter element?
The Tsunami 21999-0202 50 Series Oil Coalescing Filter Service Kit is used to service the oil coalescing filter and includes the replacement coalescing element.
What is the replacement water separator service kit?
The replacement water separator service kit is Tsunami PN 21999-0227.
What is the replacement membrane dryer core?
The replacement membrane core is Tsunami PN 21999-0355.
Does this dryer use desiccant?
No. The 21999-0357 is a membrane air dryer. It uses hollow-fiber membrane technology rather than a replaceable desiccant cartridge.
What is the difference between a membrane dryer and a refrigerated dryer?
A refrigerated dryer uses an electrically powered refrigeration circuit to cool compressed air and condense moisture. A membrane dryer uses hollow-fiber membrane technology to remove water vapor and requires no electricity or refrigerant.
