From power transformers to gas-insulated switchgear, our portfolio spans the high-voltage and industrial machinery categories that keep modern infrastructure running.
We focus on equipment with long lifecycles, high technical content, and demanding documentation requirements — where our experience makes a measurable difference.
Liquid-dielectric and dry-type, up to 500 kV class, with on-load tap changers (OLTC). For utilities, industrial substations, and process plants.
High and medium voltage switchgear, gas-insulated switchgear (GIS), circuit breakers, disconnectors, and complete protection systems.
Heavy-duty industrial machinery, electric motors and drives, electromechanical equipment for refineries, manufacturing and processing.
Liquid-dielectric power transformers with on-load tap changers (OLTC) for high-voltage transmission and industrial substations. Each unit is engineered to its application — from oil and gas processing complexes to utility distribution networks.
Our typical transformer scope spans:
Every transformer is supplied with a complete documentation package: type test reports, routine test certificates, factory acceptance test (FAT) reports, transport drawings, installation manuals, and operations & maintenance manuals.
Nameplates, valve markings, control panel labels, and operations manuals are routinely supplied in the customer's working language — including French and Arabic for North African and Middle Eastern projects.
For projects under letter of credit, we coordinate the issuance of certificates of origin, conformity certificates and packing documentation in line with international trade standards — and in the customer's working language.
High and medium voltage switchgear assemblies, gas-insulated switchgear (GIS), circuit breakers, disconnectors and complete protection systems for substations, power plants and large industrial installations.
Switchgear is rarely an off-the-shelf purchase. Every project requires single-line diagrams, protection coordination, control schematics, and integration with existing SCADA systems.
We coordinate with our customers' engineering teams from RFQ to commissioning — ensuring the switchgear specifications, type tests, and routine tests align exactly with the project's contractual requirements.
For projects in regulated markets — particularly across North Africa — we also handle local conformity certification, country-of-origin documentation, and on-site commissioning support coordination with the customer's installation team.
Beyond electrical equipment, Sieyuan Limited supplies metalworking machine tools, CNC equipment and electromechanical machinery to manufacturers, fabrication shops and infrastructure contractors. Each unit is sourced from established Chinese OEMs with verified production capacity.
Heavy-duty floor-type drilling machines (Z5150B-1 class and equivalents), radial drilling machines, vertical machining centres, horizontal boring mills and column-type drilling stations for mechanical workshops, structural fabrication and toolroom use.
CNC band saws, structural steel processing lines, automatic stirrup benders, pipe and bar cutting equipment for steel fabrication, rebar processing, and construction supply chains. Sourced from Shandong-based OEMs with proven track records.
Each machine ships with the manufacturer's nameplate, full operating documentation, and a pre-shipment inspection record. Equipment specifications, model numbers and production dates are independently verified before crating.
Three-phase induction motors, synchronous motors, variable frequency drives (VFDs) and soft starters for industrial applications up to several MW.
Pumps, compressors, fans, mixers and other rotating equipment for oil & gas, petrochemical, water treatment and manufacturing applications.
Cranes, hoists, conveyors and lifting equipment for industrial facilities, warehouses, ports and construction sites.
Industrial machinery purchases require a different approach than commodity sourcing. We work with customers to define technical specifications, identify two or three pre-qualified manufacturers, conduct comparative technical and commercial evaluations, and only then proceed to order placement.
For machine tools and CNC equipment, our standard process includes a pre-shipment factory visit, machine power-on test, accuracy verification (ISO 230 spindle alignment where applicable) and crating supervision. The post-shipment file includes the manufacturer's nameplate photograph, test certificate, and complete operating documentation.
This methodology — slower than spot purchasing, faster than full international tender — typically reduces total project cost by 12 to 25 % while preserving technical integrity.
Inspection visits, factory acceptance tests, witness points — these are not delegated to third-party inspectors. Our team attends in person, raises technical reservations on the spot, and ensures any deviation is resolved before shipment.
For each major equipment shipment, we maintain a complete inspection record: photographs, test reports, deviation logs and corrective action verification. This record is shared with the customer as part of the post-shipment package.
Discuss your projectWhether you have a complete technical specification or just a high-level project brief, we are happy to work through the requirements with you and propose a sourcing strategy.
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