Industrial Supercritical CO2 Equipment for Pumpkin Seed Oil

Pumpkin seeds feature a high oil content, thus vessel geometry is important when designing industrial supercritical co2 extraction process equipment with inline monitoring for this feedstock. A vessel that is not appropriate for the material can provide an accumulation danger and make operation or cleaning more difficult.

TOPTION designed the TOP330-55-750 configuration with a customized diameter-to-height ratio for pumpkin-seed extraction, including a 55 MPa design-pressure system with a maximum working pressure of 50 MPa, three extraction vessels, three separation vessels, CO2 pressurization, CO2 recovery, and integrated PLC control.

Pumpkin-seed material can carry a high oil load. In this project, TOPTION's engineering response was to customize the extraction vessel's diameter-to-height ratio. The purpose is to reduce the risk of excessive oil accumulation and blockage during operation. This is a design response to the feedstock, not a generic vessel selection.

For buyers, the practical lesson is simple: when requesting a quotation for a custom supercritical CO2 extraction system, provide more than a target vessel volume. The equipment team also needs to understand the raw material, preparation method, expected loading pattern, operating pressure, operating temperature, and cleaning requirements. These inputs help define the vessel geometry and the arrangement of the material bucket.

This project uses 316L stainless steel forged construction for the extraction vessels. The design includes an external jacket for circulating-water temperature control, a fast-opening clamp structure, and a pneumatic-cylinder lifting arrangement for the vessel head. The seal material for opening and closing is selected for repeated use and resistance to swelling. These details matter in daily operation, especially when the system is used for high-oil feedstocks such as pumpkin seeds

The core process uses three extraction vessels. According to the project brief, the vessels can run independently or work at the same time. A staggered loading sequence allows one vessel to be handled while the other vessels continue their process cycle. The design also includes a CO2 pre-boost pump to support vessel switching without stopping the main process flow.

This arrangement is relevant for buyers who need more than a single batch vessel. It creates a basis for coordinating loading, extraction, depressurization, and material removal across three vessels. The final operating sequence still depends on the customer's mature extraction process, feedstock preparation, and approved operating recipe. For this reason, the user's process information is essential during commissioning and trial production.

The pressure boundary is defined for the intended high-pressure application. The extraction vessels have a 55 MPa design pressure and a 50 MPa maximum working pressure. The project's design code and operating conditions govern the selection of high-pressure and low-pressure piping, fittings, and pressure-related components. The final piping specification is confirmed during engineering review.

A complete supercritical CO2 extraction line must be evaluated as a connected system rather than as an extraction vessel alone. This configuration includes the main CO2 high-pressure pump, a pre-boost pump, a CO2 storage tank, a condenser, a subcooler, and a recovery compressor.

The main high-pressure pump and pre-boost pump are selected to support stable CO2 supply at the required extraction pressure. The pumps use ceramic plungers, oil self-circulation cooling, pump-head cooling, wetted materials suitable for CO2 service, outlet pressure buffering, and variable-frequency control. These features help improve reliability and reduce wear during long operating cycles.

The recovery section includes an oil-free piston compressor and a CO2 recovery circuit. CO2 recovery is important for industrial-scale operation because it reduces gas consumption and improves the overall economics of the extraction process. The system also includes CO2 storage, tail-gas storage, filtration, refrigeration, cold-water circulation, and a tubular condenser. These components should be checked against the final process flow diagram and site utilities before purchase.

The system includes three 100 L vertical separation vessels. Each separator can be controlled independently in temperature, allowing the customer to optimize separation conditions for different fractions. The final instrument list and control logic should confirm how the independent temperature-control requirement is implemented in the delivered software.

The documented control platform is an industrial PLC with Ethernet communication. The control system includes control software, control programs, a display, digital and analog I/O modules, variable-frequency drives, pressure and temperature transmitters, a mass-flow meter, level instruments, and emergency-stop buttons.

The touchscreen is designed to display equipment status and measured monitoring parameters in real time. The control logic includes process-flow control, process-parameter control, safety protection, electrical control, and the operator interface. The system supports control of CO2 flow, extraction pressure, and extraction temperature, with storage for 50 recipe parameter groups. This recipe storage helps operators switch between different products or process conditions more efficiently.

The project direction also states that the system can interface with the customer's DCS host computer for remote control and automated monitoring across the process. Because a DCS interface depends on the customer's architecture, communication protocol, tag list, cybersecurity requirements, and acceptance procedure, these details should be agreed during engineering review.

For buyers comparing industrial supercritical CO2 extraction process equipment with inline monitoring, the key evaluation point is not only the screen hardware. Ask for the I/O list, alarm matrix, interlock description, trend-recording scope, recipe-management scope, and DCS interface definition. These documents make the automation boundary clear before manufacturing begins.

The high-pressure design includes several safety and interlock functions:

• Process valve position checks to prevent the pressurization pump from running when a switching valve is not in the correct position.
• Pressure and temperature monitoring for extraction vessels, separation vessels, and the CO2 storage tank, linked to safety interlocks.
• Differential-pressure monitoring across the extraction vessel. If the detected pressure difference exceeds the set value, the pressurization pump stops, and an alarm is generated.
• Fast-opening mechanism interlocked with vessel pressure. The opening control is unavailable while pressure is present and becomes effective only when the vessel pressure is zero.
• Clamp closure confirmation before the high-pressure pump can start.
• Pressure transmitters at the main and backup pump outlets stop the pumps when the set maximum working pressure is exceeded.
• Protection functions for the refrigeration unit and recovery compressor.

If you are comparing a custom supercritical CO2 extraction system for pumpkin seed oil, share your feedstock information, required operating recipe, site conditions, automation expectations, and compliance route with TOPTION. The engineering team can review the vessel geometry, three-vessel configuration, CO2 recovery arrangement, separator controls, PLC scope, and DCS interface as one project.

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