DVAP Series · Standard Dewar Vaporizers

Dewar and liquid-cylinder vaporizers. Built in the USA.

Get the gas flow your application needs with an external ambient air vaporizer for nitrogen, oxygen, or argon. Compare three DVAP models, see pricing, and get live UPS or LTL shipping & handling at checkout.

See prices & order Help me choose

Built in Hudson, NH

Oxygen-service prepared

Nationwide shipping

FWM DVAP-3 high-capacity dewar vaporizer photographed on the manufacturing floor — DVAP Series · DVAP-3 shown
Zero-power ambient air vaporization

Standard models

3,600 SCFH

Maximum 4 hr rating

600 PSIG

Maximum allowable pressure

Since 1975

U.S. manufacturing

Standard DVAP models

Select the flow range your operation requires.

In stock. Choose a model and quantity, then enter your destination for live UPS or LTL shipping & handling options. Tax and final acceptance are confirmed during checkout and review.

DVAP-1

Compact, single-cylinder duty

$1,200

Compact external vaporizer for lower-flow, single-cylinder nitrogen, oxygen, and argon applications.

8 hr flow: 800 SCFH
MAWP: 600 PSIG
Gas service: N₂ / O₂ / Ar
Ships by: Parcel / UPS eligible

Ships in 1-2 business days after payment and shipping verification.

Physical and connection details

Unit dimensions: 66.5 x 16.3 x 10 in
Dry weight: 55 lb
Packaged dimensions: 67 x 18 x 11 in
Packaged weight: 65 lb
Inlet connection: 1/2 in NPT brass elbow
Outlet connection: 1/2 in NPT brass elbow

View DVAP-1 product page

Quantity

Start DVAP-1 Order

See live shipping & handling options with your destination. Review charges before payment.

DVAP-2

Mid-range industrial duty

$1,950

Mid-range liquid-cylinder vaporizer for industrial applications requiring greater sustained gas withdrawal.

8 hr flow: 1,600 SCFH
MAWP: 600 PSIG
Gas service: N₂ / O₂ / Ar
Ships by: LTL freight

Ships in 1-2 business days after payment and shipping verification.

Physical and connection details

Unit dimensions: 65.7 x 17 x 19 in
Dry weight: 100 lb
Packaged dimensions: 70 x 22 x 26 in
Packaged weight: 165 lb
Inlet connection: 1/2 in NPT brass elbow
Outlet connection: 1/2 in NPT brass elbow

View DVAP-2 product page

Quantity

Start DVAP-2 Order

See live shipping & handling options with your destination. Review charges before payment.

DVAP-3

Highest-capacity DVAP model

$2,750

Highest-capacity DVAP model for demanding intermittent Dewar and liquid-cylinder applications.

8 hr flow: 2,800 SCFH
MAWP: 600 PSIG
Gas service: N₂ / O₂ / Ar
Ships by: LTL freight

Ships in 1-2 business days after payment and shipping verification.

Physical and connection details

Unit dimensions: 65.7 x 26 x 19 in
Dry weight: 134 lb
Packaged dimensions: 70 x 24 x 33 in
Packaged weight: 240 lb
Inlet connection: 1/2 in NPT brass elbow
Outlet connection: 1/2 in NPT brass elbow

View DVAP-3 product page

Quantity

Start DVAP-3 Order

See live shipping & handling options with your destination. Review charges before payment.

Model comparison

Three capacities. One consistent buying path.

Compare rated flow at 4, 8, and 24 hours. Final vaporizer selection is confirmed against gas, pressure, duty cycle, and ambient conditions.

Compare DVAP model price, flow, pressure, gas service, and shipping mode
Model	Price	4 / 8 / 24 hr flow	MAWP	Service	Shipping	Action
DVAP-1	$1,200	1,200 / 800 / 640 SCFH	600 PSIG	N₂ / O₂ / Ar	Parcel / UPS eligible	Start Order
DVAP-2	$1,950	2,400 / 1,600 / 1,280 SCFH	600 PSIG	N₂ / O₂ / Ar	LTL freight	Start Order
DVAP-3	$2,750	3,600 / 2,800 / 2,240 SCFH	600 PSIG	N₂ / O₂ / Ar	LTL freight	Start Order

DVAP-1

Parcel / UPS eligible

$1,200

4 / 8 / 24 hr flow: 1,200 / 800 / 640 SCFH
MAWP: 600 PSIG
Gas service: N₂ / O₂ / Ar

Start DVAP-1 Order

DVAP-2

LTL freight

$1,950

4 / 8 / 24 hr flow: 2,400 / 1,600 / 1,280 SCFH
MAWP: 600 PSIG
Gas service: N₂ / O₂ / Ar

Start DVAP-2 Order

DVAP-3

LTL freight

$2,750

4 / 8 / 24 hr flow: 3,600 / 2,800 / 2,240 SCFH
MAWP: 600 PSIG
Gas service: N₂ / O₂ / Ar

Start DVAP-3 Order

Flow rating basis

Ratings are sustained SCFH by run time at the published DVAP test basis. Final selection depends on the application.

How it ships

A clear path from order details to your receiving dock.

The order form adapts to the selected model. It gathers parcel details for DVAP-1 and commercial receiving requirements for DVAP-2 and DVAP-3.

Choose a model

Set quantities and compare sustained flow before starting the order.

Confirm the ship path

DVAP-1 is parcel eligible. DVAP-2 and DVAP-3 move by LTL freight.

Pay securely online

Complete payment on this site with Stripe. FWM verifies availability, packout, freight, and application fit with every order.

Customer carrier accounts supported when enabled

Commercial dock and liftgate details captured

Secure order status link after submission

Talk with the manufacturer

Not sure which DVAP you need?

Tell us what you’re running and what you need from it. We’ll help confirm the model and the next step. You can start without a complete specification.

Have your gas, flow, pressure and run time ready? Use the sizing tool.

Call (603) 578-3366

Buyer terminology

Liquid cylinder vaporizer, Dewar vaporizer, or heat exchanger?

These terms often describe the same application. A DVAP is a natural-draft external vaporizer: a finned-aluminum ambient air heat exchanger connected to a portable cryogenic liquid cylinder, also commonly called a Dewar. It increases available gaseous withdrawal when the cylinder's internal vaporizer cannot sustain the required flow.

FWM sizes each liquid cylinder ambient vaporizer to the gas service, required SCFH, pressure, run time, ambient conditions, and connection requirements. DVAP models are intended for intermittent nitrogen, oxygen, and argon withdrawal; higher-flow bulk-tank applications generally use the FWM AV Series industrial ambient air vaporizers.

Size a liquid cylinder vaporizer Request application review

Built for industrial service

Performance data you can put in front of engineering and purchasing.

DVAP units are sized for intermittent Dewar and single-cylinder withdrawal duty. For continuous high-flow service, the FWM AV Series ambient vaporizers are typically the better fit.

All DVAP units are cleaned, sealed, and tagged for oxygen service. Final oxygen-service cleaning and documentation are confirmed with FWM for the delivered configuration.

Flow ratings are sustained nitrogen / air ratings measured at 300 PSI with LN2 / air at 70F, listed by run time (4, 8, and 24 hour). Actual performance varies with ambient temperature, humidity, gas service, and duty cycle. Consult FWM for application-specific sizing before purchase.

Preliminary selection only. Final model selection and performance depend on gas service, pressure, duty cycle, ambient conditions, installation, and applicable code requirements.

Need a technical check?

Send the application before you order.

FWM can confirm gas service, sustained flow, pressure, duty cycle, connections, and oxygen-service documentation.

Model and duty-cycle review
Connection requirements
Reference drawing and documentation

Request application review