Manufacturer product photograph.

VacMaster VP321 Chamber Vacuum Sealer

Best fit for whole roasts, tall jars and stacked packs; two seal bars, a bench machine to leave set up.

Strengths

Tall chamber: room for bone-in cuts and jars
Wide seal bar for large bags
Maximum pouch size stated, so bags can be bought to fit

Limitations

Heavy: plan where it lives before it arrives
Oil pump: oil changes on the manual’s schedule

Two 17.25 in seal bars
Oil pump
7 in chamber height

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Specifications

Seal bar length: 2 x 17.25 inProduct page (archived) [1]
Chamber dimensions (W x D x H): 16.5 x 17.25 x 7 inProduct page (archived) [1]
Pump type: 1.5 HP rotary oil pumpProduct page (archived) [1]
Weight: 210 lbProduct page (archived) [1]
Overall dimensions (W x D x H): 22.25 x 20 x 20.5 inThe specification table on the same page gives 22.25 x 20 x 20 in.Product page (archived) [1]
Electrical: Single phase 110 V, 20 AProduct page (archived) [1]
Max bag size: 16 x 16 inProduct page (archived) [1]

What to know before you buy

Largest pouch: The maker states a maximum pouch size of 16 x 16 in. Buy pouches no wider than that, and remember the chamber has to hold whatever is inside the pouch too.
Chamber: The usable chamber is 16.5 in × 17.25 in × 7 in: tall enough for bone-in cuts and jars that have to clear a closed lid.
Upkeep: An oil pump needs its oil changed on the schedule in its manual, so budget for pump oil alongside the machine.
Pump oil for chamber sealers
Where it lives: At 210 lb it is a machine for a bench it stays on.
Pouches that fit: These chamber pouches in the catalogue fit its sealing width and are no longer than the 16 in maximum pouch length its maker states:
Breville Commercial PSC-VBF-0610 Chamber Vacuum Bags, 6 × 10 in, 250-count
Avid Armor Chamber Pouches, 10 × 13 in, 250-count
Avid Armor Chamber Pouches, 11 × 13 in, 250-count
Avid Armor ACPA20 Chamber Pouches, 300-count assorted
Avid Armor ACPAX1 Chamber Pouches, 300-count assorted
LEM MaxVac Pro Chamber Pouches, 6 × 9 in, 250-count
LEM MaxVac Pro Chamber Pouches, 8 × 10 in, 250-count
Avid Armor Chamber Pouches, 300-count assorted
UltraSource Chamber Pouches, 8 × 12 in, 1000-count
LEM MaxVac Pro Chamber Pouches, 10 × 13 in, 250-count
VacMaster Temp Plus Chamber Pouches, 8 × 12 in, 100-count
UltraSource Chamber Pouches, 10 × 13 in, 250-count
MAGIC SEAL Smooth Chamber Pouches, 8 × 12 in, 100-count
Avid Armor Chamber Pouches, 6 × 10 in, 250-count

Read from the maker’s own documents; Chamber Bench has not tested this product. How we evaluate

How the VacMaster VP321 compares

Scroll horizontally to see every column.

VacMaster VP321 beside similar chamber sealers, each figure as its maker publishes it
Model	Seal bar	Chamber	Pump	Weight
VacMaster VP321	2 x 17.25 in	16.5 x 17.25 x 7 in	1.5 HP rotary oil pump	210 lb
VacMaster VP215	Conflicting: 10 Inch removable seal bar with double seal wire / 10.25 in	11.25 x 15.25 x 5 in	Conflicting: 1/5 HP (.2 HP) rotary oil pump / 1/4 HP rotary oil pump	84 lb
VacMaster VP230	12.25 in	12.5 x 15 x 5 in	1/2 HP rotary oil pump	Conflicting: 89 Pounds / 82 lbs / 96.8 lbs
VacMaster VP320	16 in	16.75 x 18 x 7 in	1.5 HP rotary oil pump	185 lb

VacMaster VP321 questions, answered from the maker’s records

How big is the VacMaster VP321 chamber?

VacMaster gives the chamber size as 16.5 x 17.25 x 7 in.

What size bags fit the VacMaster VP321?

Smooth chamber pouches up to 16 × 16 in, the largest size VacMaster states for it; embossed bags made for edge sealers are not needed. Chamber pouch packs we list that fit both its width and length: Avid Armor Chamber Pouches, 11 × 13 in, 250-count; Avid Armor Chamber Pouches, 10 × 13 in, 250-count; LEM MaxVac Pro Chamber Pouches, 10 × 13 in, 250-count.

Does the VacMaster VP321 need pump oil?

Yes. VacMaster lists an oil pump, so the oil is changed on the schedule in its manual and pump oil is an ongoing purchase. Its record reads: 1.5 HP rotary oil pump.