Question 1

What is an ambient air vaporizer?

Accepted Answer

An ambient air vaporizer is a finned-aluminum heat exchanger that uses surrounding ambient air to warm cryogenic liquid, such as liquid nitrogen, oxygen, or argon, and convert it into usable gas. It is a natural-draft design, meaning it provides zero-cost ambient heating with no external power, fuel, or steam required.

Question 2

What's the difference between a Dewar-style and a large-capacity heat exchanger?

Accepted Answer

Dewar-style units are compact vaporizers that boost gas withdrawal from portable liquid cylinders. Large-capacity ambient air vaporizers handle continuous, high-flow regasification from bulk cryogenic tanks and are used for gas plants, peak shaving, and pipeline-scale supply.

Question 3

Which gases can FWM vaporizers handle?

Accepted Answer

FWM cryogenic heat exchangers and ambient air vaporizers are built for nitrogen (N2), oxygen (O2), argon (Ar), LNG, and hydrogen (H2) service. Units intended for oxygen service are cleaned for oxygen (O2) service.

Question 4

Does FWM build custom, OEM, or private-label vaporizers?

Accepted Answer

Yes. FWM is an OEM manufacturer and builds custom, private-label, and build-to-print cryogenic heat exchangers and ambient air vaporizers. Send your specifications or drawings and request a manufacturing review.

Question 5

Where are FWM heat exchangers manufactured?

Accepted Answer

FWM has manufactured cryogenic heat exchangers and ambient air vaporizers in the U.S. since 1975 from its Hudson, New Hampshire facility.

Question 6

Can FWM match or replace an existing vaporizer design?

Accepted Answer

Yes. FWM can match, replace, or reverse-engineer an existing vaporizer design to fit your footprint, connections, and flow requirements. Request a manufacturing review with the unit you need matched.

	FWM DVAP	FWM AV	Custom	OEM/Private-Label
Best use case	Liquid cylinders & Dewars	Bulk storage tanks	Modified standard unit, engineered to your requirement	Your brand, our production
Typical gas services	LN₂, LOX, LAR	LN₂, LOX, LAR, LNG, H₂	Any supported gas	Per customer specification
Flow range	640–3,600 SCFH	2,000–83,000 SCFH	Per engineering review	Per customer specification
Pressure range	MAWP 600 PSIG	—	Per engineering review	Per customer specification
Footprint	Compact, portable	Floor-mounted, larger	Engineered to requirement	Per customer specification
Typical buyer	Gas distributors, end users	Bulk storage facilities	Specific application needs	OEMs, distributors, tank companies
Customization level	Standard models	Standard + options	Fully custom	Fully custom
Documentation	Standard + O₂ cert	Standard + O₂ cert	Per requirement	Per customer specification

Model	4-hr Run Time	8-hr Run Time	24-hr Run Time	MAWP
DVAP-1	1,200 SCFH	800 SCFH	640 SCFH	600 PSIG
DVAP-2	2,400 SCFH	1,600 SCFH	1,280 SCFH	600 PSIG
DVAP-3	3,600 SCFH	2,800 SCFH	2,240 SCFH	600 PSIG

Manufacturer-direct cryogenic ambient air vaporizers.

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