GST

What GST does

GST Co., Ltd. (지에스티산업) is a privately held Korean precision manufacturer founded in 1999 and headquartered in Jincheon-gun, Chungcheongbuk-do, with a sales office in Yongin and a wholly-owned production subsidiary in Hefei, China. The company specializes in bellows and vacuum components — welded, formed, seamless, and Teflon bellows, vacuum valves, vacuum fittings (KF, ISO, CF), magnetic fluid seals, vacuum chambers, and diaphragms — built on thin sheet metal forming and precision micro-welding technologies developed in-house over more than two decades. GST holds multiple Korean patents on bellows assemblies, safety covers, anti-loosening valves, and gas-leak detection interfaces, and has been designated a Root Technology and Materials/Components/Equipment enterprise by the Korean government.

Name

GST

Legal name

(주)지에스티산업

Website

https://bellowss.com

Company type

Private

Founded year

1999

Operating status

Operating

Headcount range

51–100 employees

Short description

GST (지에스티산업) is a Korean precision manufacturer of bellows, vacuum valves, magnetic fluid seals, chambers, and diaphragms, supplying semiconductor, display, solar, industrial valve, and automotive sensor OEMs directly and via OEM arrangements.

Ownership category

akta.pro rank

Headquarters

HQ city

Jecheon

HQ country

South Korea

HQ region

Asia

Offices3 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Personnel, Operations, Supply Chain, Technology or R&D, Infrastructure, Marketing or Sales

Distribution channels1 record

Marketing channels3 records

Core offering

GST Co., Ltd. is a Korean bellows specialist manufacturer founded in 1999 that produces precision metal bellows (welded, formed, seamless, and Teflon), vacuum valves, vacuum sealing components, magnetic fluid seals, and vacuum chambers for semiconductor, display (LCD, OLED), solar, industrial valve, automotive sensor, aerospace, and chemical industries. The company leverages thin sheet metal forming and precision micro-welding to supply directly and through OEM arrangements to major domestic and foreign manufacturers.

Product overview

GST (지에스티산업) is a bellows specialist company that manufactures and supplies precision metal bellows and vacuum components for semiconductor, display, solar, aerospace, automotive, and chemical industries. The company operates a unified product portfolio centered around bellows technology, with eight core product categories: Welded Bellows (용접벨로우즈) and Formed Bellows (성형벨로우즈) for basic sealing applications; Seamless Bellows (Seamless 벨로우즈) for enhanced corrosion resistance; Teflon Bellows (Teflon 벨로우즈) for chemically corrosive environments; Vacuum Valves (진공밸브) and Vacuum Components (진공부품) for vacuum system integration; Magnetic Seals (Magnetic Seal) for rotary vacuum transmission; and Chambers for complete vacuum enclosure solutions. The company also supplies diaphragm components for diaphragm valves and sensors, demonstrating vertical integration across the vacuum equipment supply chain.

Differentiator

Problem solved

Functional benefit

Products and services

• Welded Bellows (용접벨로우즈) Welded bellows manufactured through sheet metal forming and precision welding technology, used for vacuum, pressure, and fluid transport piping applications. Offered in both circular and square configurations for vacuum equipment manufacturers and industrial OEMs.
• Formed Bellows (성형벨로우즈) Formed bellows designed for vacuum, pressure, and fluid transport applications with customizable forming methods, groove shapes, materials, and thickness based on operating environment requirements, including thin-gauge bellows for vacuum piping and thicker gauges for high-pressure applications.
• Seamless Bellows (Seamless 벨로우즈) Bellows produced by drawing thin sheets into tubing then forming, eliminating the welding process to deliver superior corrosion resistance, increased durability, and precise elastic maintenance. Used in bellows sensors, bellows valves, and various sealing applications.
• Teflon Bellows (테프론 벨로우즈) Bellows made from fluororesin (Teflon) through special processing, customized by shape and material based on customer requirements for corrosive gases, strong acids, and alkaline solutions where general metal bellows cannot be used. Manufactured to standard KF and ISO specifications for interchangeability.
• Vacuum Valve (진공밸브) Vacuum valves with welded bellows for high vacuum applications, featuring anti-loosening devices for high-vibration and specialized applications. Available in ISO, NW, and CF port configurations, manually or actuator operated.
• Vacuum Components (진공부품) Sealing components for chambers, pumps, and pipes, including flanges in SUS304 and 316 materials, available in KF(NW)-Type, ISO-Type, and CF-Type specifications for vacuum system integration.
• Magnetic Fluid Seal (자성유체씰) Magnetic fluid seals for transmitting rotational power while maintaining vacuum integrity in semiconductor, LCD, OLED, and solar industry equipment. Magnetic fluid consists of nano-sized magnetic particles (approximately 10nm) with special surface treatment mixed in colloidal state fluid, preventing precipitation. For linear motion applications, welded bellows are used instead.
• Vacuum Chamber Vacuum chambers for various industrial applications, completing the company's vacuum enclosure solutions for semiconductor, display, and industrial process equipment customers.

Segments3 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Recent moves7 records

Expansion highlights4 records

Regional players

• Anest Iwata: Anest Iwata (Japan) manufactures vacuum pumps, blowers, and related vacuum equipment with strong penetration in Asian semiconductor and industrial markets. Comparable to GST as a regional vacuum-hardware supplier to Japanese/Korean display and semiconductor OEMs, though not a direct bellows competitor.

Broad incumbents

• VAT Group: VAT Group (Switzerland) is a global leader in vacuum valves, gate valves, and sealing solutions for semiconductor, display, and thin-film manufacturing. Overlaps with GST's vacuum valve and bellows products but operates at much larger scale across a broader valve portfolio.
• Edwards Vacuum (Atlas Copco): Edwards Vacuum (UK, part of Atlas Copco) is a leading global supplier of vacuum and abatement solutions for the semiconductor and adjacent industries. Comparable to GST at the end-customer level (semiconductor vacuum hardware) though much larger and focused on pumps and integrated systems.
• ULVAC: ULVAC (Japan) is a large manufacturer of vacuum equipment and components serving semiconductor, display, and solar customers in Asia. Comparable to GST in serving the same end-customers with vacuum-related hardware but at substantially larger scale and broader product breadth.
• Kurt J. Lesker Company: Kurt J. Lesker (US) manufactures and distributes vacuum components, flanges, fittings, and vacuum hardware globally to semiconductor and research end-markets. Overlaps with GST's vacuum components and flanges offering but as part of a much broader vacuum catalog.
• Pfeiffer Vacuum: Pfeiffer Vacuum (Germany) provides a full range of vacuum pumps, components, and leak-detection equipment to semiconductor, analytical, and industrial markets. Overlaps with GST at the vacuum components level through distribution and standard hardware interfaces (KF/ISO/CF).

Direct peers

• MDC Vacuum Products: MDC Vacuum Products (US) supplies vacuum components including flanges, fittings, viewports, and related hardware (KF, ISO, CF standards) to semiconductor and research customers. Directly comparable to GST's vacuum components line and to its standard KF/ISO/CF-port vacuum valve offering.
• Technetics Group: Technetics Group (US) manufactures precision metal bellows, edge-welded bellows, seals, and related engineered components for semiconductor, aerospace, and industrial applications. Overlap with GST is strongest in bellows and vacuum sealing components for high-purity and demanding process environments.
• Servometer: Servometer (US) specializes in miniature precision metal bellows and electroformed components used in sensors, valves, and instrumentation. Comparable to GST in bellows-form-factor expertise and in serving sensor and valve OEMs in industrial and aerospace markets.
• WITZENMANN: WITZENMANN is the largest precision metal bellows manufacturer globally (Germany), producing welded, formed, and seamless metal bellows for industrial sealing, vacuum, and exhaust applications. It is the most directly comparable specialist to GST across bellows types and end-uses including semiconductor and industrial valves.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/gst-co-ltd

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Subsidiaries1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about GST