Gas Mixing & Injection System for CAP | Food Manufacturing Component

Product Specifications

Technical details and manufacturing context for Gas Mixing & Injection System

Definition

The Gas Mixing & Injection System is a component used in food manufacturing, specifically within a Controlled Atmosphere Packaging (CAP) Station. Its function is to create precise gas mixtures—typically nitrogen, carbon dioxide, and oxygen in varying ratios—and inject them into sealed food packaging. By displacing oxygen, the system slows oxidation and microbial growth, thereby extending shelf life and preserving the quality of perishable food products. The system receives pure gases from supply lines. A central controller, based on pre-set recipes, regulates the flow of each gas via precision mass flow controllers or valves into a mixing chamber. The blended gas mixture is then delivered under controlled pressure through an injection head or nozzle into the food package, which is simultaneously evacuated or flushed of ambient air. Key parameters include a gas flow rate of 0.5–5 m³/h per gas channel (adjustable), gas mixing accuracy of ±0.5% for each component, and a gas purity requirement of 99.9–99.999% depending on gas type. Operating pressure ranges from 1.0 to 1.6 MPa, with a gas temperature range of -10 to 50°C (non-condensing) and an ambient temperature range of 0 to 40°C for the control unit. Supply voltage is 24 V DC ±10% (optional 230 V AC), with power consumption of 50–200 W depending on configuration. The control cabinet has an ingress protection rating of IP54–IP65 (IEC 60529). Gas connection size is 6–12 mm OD for tubing. Weight ranges from 15 to 60 kg without gas cylinders, and dimensions (W×H×D) for the control unit are 400×600×300 to 600×900×500 mm. Materials on file include stainless steel (AISI 316L), food-grade plastics (e.g., PTFE, PEEK), precision solenoid valves, and electronic mass flow controllers. These specifications are directory reference ranges; verify model-specific values and standards with the legal manufacturer or supplier before procurement.

Working Principle

The system receives pure gases from supply lines. A central controller, based on pre-set recipes, regulates the flow of each gas via precision mass flow controllers or valves into a mixing chamber. The blended gas mixture is then delivered under controlled pressure through an injection head or nozzle into the food package, which is simultaneously being evacuated or flushed of ambient air.

Common Materials

Stainless Steel (AISI 316L), Food-grade plastics (e.g., PTFE, PEEK), Precision solenoid valves, Electronic mass flow controllers

Technical Parameters

Parameter	Typical range	Notes & selection driver
Gas Flow Rate	0.5–5 m³/h	Per gas channel, adjustable
Gas Mixing Accuracy	±0.5 %	For each gas component
Gas Purity Requirement	99.9–99.999 %	Depends on gas type
Operating Pressure	1.0–1.6 MPa
Gas Temperature Range	-10–50 °C	Non-condensing
Ambient Temperature Range	0–40 °C	For control unit
Supply Voltage	24 ±10% V DC	Optional 230 V AC
Power Consumption	50–200 W	Depends on configuration
Ingress Protection Rating	IP54–IP65	For control cabinetIEC 60529
Gas Connection Size	6–12 mm	OD for tubing
Weight	15–60 kg	Without gas cylinders
Dimensions (W×H×D)	400×600×300–600×900×500 mm	Control unit only

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Gas Mixing Chamber/Manifold
The central hub where individual gas streams converge and are homogenized into the desired final mixture.

Material: Stainless Steel
Precision Mass Flow Controller (MFC)
Electronically controls and measures the volumetric flow rate of each input gas with high accuracy to achieve the target gas ratio.

Material: Stainless Steel, Electronics
Injection Head/Nozzle
The interface that directs the blended gas mixture into the food package. Often includes sealing mechanisms to prevent gas leakage during injection.

Material: Stainless Steel, Food-grade Seal
System Control Unit (PLC/HMI)
The programmable logic controller and human-machine interface that stores gas recipes, automates the mixing/injection sequence, and monitors system parameters.

Material: Electronics, Plastic/Steel Enclosure

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Controlled Atmosphere Packaging (CAP) Station

View system integration details

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Frequently Asked Questions

What gases can be mixed with this system?

The system is designed to mix gases such as nitrogen, carbon dioxide, and oxygen in varying ratios, as specified in the source facts. The exact gas types and ratios depend on the application and pre-set recipes.

What is the gas mixing accuracy?

The gas mixing accuracy is ±0.5% for each gas component, as listed in the parameters. This value is a reference range and should be confirmed for the specific model and application with the manufacturer.

What are the operating pressure and temperature ranges?

The operating pressure is 1.0–1.6 MPa, and the gas temperature range is -10 to 50°C (non-condensing). The ambient temperature range for the control unit is 0 to 40°C. These are reference values; verify for your specific configuration.

What materials are used in the system?

Materials on file include stainless steel (AISI 316L), food-grade plastics such as PTFE and PEEK, precision solenoid valves, and electronic mass flow controllers. These materials are typical, but confirm with the manufacturer for your specific model.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

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accuracy:	±0.5% of setpoint for gas composition
pressure:	Up to 10 bar (injection pressure), 0.5-2 bar (mixing pressure)
flow rate:	0.1-100 L/min (gas mixture)
temperature:	5°C to 40°C (ambient operation)
response time:	<2 seconds for composition changes

Gas Mixing & Injection System

Product Specifications

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