A one-way valve helps to release gas, but only works as part of a properly designed package.
Once roasted, the coffee continues to release gas, the valve is designed to release gas with limited air return, and it does not correct a weak barrier, a contaminated seam, or an error in packaging mode.
FORMAT/MATERIAL
DOSE/SPEED
BUCKLING/CONTROL
01/technique
Once roasted, the coffee continues to release gas, the valve is designed to release gas with limited air return, and it does not correct a weak barrier, a contaminated seam, or an error in packaging mode.
The valve can be pre-installed by the package manufacturer or added by a separate module, in the second case, the position, supply, pressing and availability control are agreed.
valve-pack
external applicator
control
02
Tie the valve to the material
The valve location and package structure must be kept tight, and the samples are checked after transportation, temperature changes and estimated shelf life.
barrier
adhesion
leakage
03
Don't forget the top seam
Even a well-functioning valve is useless in unstable sealing. In the seam zone, coffee, dust, folds, temperature and pressure are controlled.
cleanliness
sealing
sample
03/checklist
What to fix before requesting the supplier
01Determine who and where the valve is installed
02Get samples of all materials and sizes
03check the position of the valve relative to the grippers and sutures
04test tightness and gas exchange on the series
05not assign an unconfirmed valve module to the packaging machine
01CATALOGUE/SUPPLIER DATA
Models for testing methodology
The listings help to apply a checklist to validated data, and the missing value remains unknown until the vendor responds.
The working scenario is not normalized: ask the supplier for product specification, packaging material and sequence of operations.
Editorial guideline PRECISION ROAST on the confirmed type of machine; not the statement of the manufacturer.
Type of machine
Other type
Type at source
Semi-automatic coffee-bag one-way degassing-valve pressure and laminating machine
Product
Whole-bean coffee · GROUND COFFEE
Product at source
Suitable for coffee beans and powder
POUCH FORMAT
Coffee bag film; structured packaging taxonomy names cartons and film
Bag width
Not specified
Packet length
Not specified
Dose range
Not specified
Claimed productivity
Maximum speed 5 m/min; this is preserved as applicator/material speed and is not converted to bags/min
Automation
Semi-automatic
Automation at source
Semi-Automatic; electric drive
Nitrogen
Not specified by the supplier
Nitrogen at source
Not specified
DEGASSING VALVE
support declared
Valve at source
Coffee Bag Valve Machine / Bag Valve Laminating Machine / Semi Automatic Coffee Bag One Way Degassing Machine; product name states one-way exhaust-valve pressure; model LQ-JP1
Sealing
Cold sealing in the structured Alibaba attribute; pressure/laminating valve application in the product identity
Power
100 W
Voltage
110 V / 220 V
Dimensions
42 x 25 x 24 cm
Operators
Not specified
MOQ
1 set
Type of price
Based on order quantity
Claimed price at the time of inspection
EUR 421.81 for 1-4 sets; EUR 404.42 for 5-9; EUR 391.37 for 10+ EUR
The working scenario is not normalized: ask the supplier for product specification, packaging material and sequence of operations.
Editorial guideline PRECISION ROAST on the confirmed type of machine; not the statement of the manufacturer.
Type of machine
Other type
Type at source
Semi-automatic one-way degassing-valve fixing / hot-press machine for coffee-bag packaging
Product
Another product
Product at source
Application explicitly states Coffee but does not distinguish whole-bean from ground coffee
POUCH FORMAT
Stand-up pouch or bag; plastic and paper packaging materials
Bag width
Not specified
Packet length
Not specified
Dose range
Not specified
Claimed productivity
Maximum speed 13 pcs/min for the valve-fixing operation
Automation
Semi-automatic
Automation at source
Semi-automatic; electric drive
Nitrogen
Not specified by the supplier
Nitrogen at source
Not specified
DEGASSING VALVE
support declared
Valve at source
2026 New Semi-Automatic Coffee Bag Valve Machine, One-Way Degassing Valve Fixing Machine for Coffee Packaging
Sealing
Hot pressing; 0.5-2 seconds
Power
0.75 kW
Voltage
220 V
Dimensions
46 x 31 x 30 cm
Operators
Not specified
MOQ
1 unit
Type of price
fixed
Claimed price at the time of inspection
Bs 4,219.92 for 1 unit BOB
August 10, 2026
There are discrepancies in the listingThe generic structured product-name field says 'Snap Button Fixing Machine', while the direct listing title and Coffee application identify the offered configuration as a one-way degassing-valve fixing machine. Working pressure is rendered as '2-4 KGF/CM2 (Mpa)', combining incompatible unit labels; the value is preserved only here and not normalized.
YB-420Z Full-Automatic Vertical Coffee-Bean Packaging Machine with Degassing-Valve Applicator
Model
YB-420Z
Supplier
Shanghai Yanban Machinery Co., Ltd.
Type of seller
Not specified
Suitable applications
Candidate for forming a package of rolled material; agree on the film, size range, dispenser and actual tempo of the line.
Editorial guideline PRECISION ROAST on the confirmed type of machine; not the statement of the manufacturer.
Type of machine
VFFS
Type at source
Full automatic vertical granule packaging machine with degassing-valve applicator
Product
Whole-bean coffee
Product at source
Coffee beans, peanut and cashew nut granules
POUCH FORMAT
Vertical formed bag; exact seal geometry is not stated
Bag width
Not specified
Packet length
Not specified
Dose range
Alibaba listing surfaces name 250 g and 1 kg coffee-bean package sizes; no continuous range is stated
Claimed productivity
Not specified
Automation
Automatic
Automation at source
Full Automatic Vertical
Nitrogen
Not specified by the supplier
Nitrogen at source
Not specified
DEGASSING VALVE
support declared
Valve at source
YB-420Z with degassing valve applicator Full Automatic Vertical Coffee Beans Packaging Machine
Sealing
Not specified
Power
Not specified
Voltage
Not specified
Dimensions
Not specified
Operators
Not specified
MOQ
1 set
Type of price
range
Claimed price at the time of inspection
US$4,800-US$6,000 across current Alibaba listing surfaces USD
August 10, 2026
There are discrepancies in the listingAlibaba current listing surfaces show both US$4,800 and US$6,000 for the linked product-detail identifier; the exact selected configuration behind each price is not exposed. The direct product-detail payload did not expose bag dimensions, speed, power, voltage or machine dimensions in the retrievable text evidence.
Not always. The solution depends on the product, packaging time, format and validated storage scheme. For freshly roasted coffee, it is often considered because of ongoing degassing.
Is it possible to install a valve on a packaging machine?+
Only if the configuration includes a compatible applicator. In many processes, the valve is pre-installed by the supplier of the finished package.
How to check the valve at reception?+
A method of checking the presence, position, tightness and behavior of the packet over time is agreed upon.
Translate the method to the working specification
Set the product, package, dose, series, options and infrastructure, then test the models under the same conditions.
