KSM Korea
KSM Korea manufactures precision sealing and thermal components — mechanical seals, welded metal bellows, fine ceramics, semiconductor heaters, and ferrofluidic seals — for semiconductor equipment makers, nuclear power plants, petrochemical operators, and aerospace programs, holding an estimated 70% global share in metal bellows.
- Company typePrivate
- Founded1979
- HeadquartersGyeongju, South Korea
- Headcount501–1,000
- GTM typeB2B
- OfferingHardware or Manufacturing
What KSM Korea does
KSM Korea is a 47-year-old South Korean industrial components manufacturer operating through three legal entities (FLOWSERVE KSM, KSM Co., Ltd., and KSM Component Co., Ltd.) under the corporate umbrella of Flowserve Corporation. The group designs and manufactures precision sealing and thermal components — mechanical seals, welded metal bellows, fine ceramics, semiconductor heaters, and ferrofluidic seals — using proprietary process technologies including in-house silicon carbide and silicon nitride ceramic powder production, full-fluid-film nuclear RCP seals, and 30+ years of magnetic-fluid sealing expertise. KSM holds an estimated 70% global market share in welded metal bellows and supplies critical components into semiconductor fabrication equipment, nuclear reactor coolant pumps, petrochemical compressors, aerospace launch vehicles, and flat panel display manufacturing. Notable flagship applications include metal bellows supplied to Applied Materials since 2000, nuclear RCP seals for Korea Hydro & Nuclear Power, and mechanical seals flown on Korea's KSLV-II Nuri launch vehicle.
The business is a B2B enterprise component model: no standard public pricing exists, with all sales conducted through quote-based quotation against customer specifications and supported by a dense Korean QRC (Quick Response Center) network of six locations plus wholly-owned sales subsidiaries in the US (Sunnyvale, Los Angeles) and Japan (Tokyo). Manufacturing is split across multiple Gimpo-si facilities in Gyeonggi-do with a new Vietnam production base opened in January 2023 (KSM ENG VINA) targeting 200+ jobs. Export revenue grew from approximately USD 50 million in 2018 to USD 70 million in 2022, and the company employs 501–1,000 staff. Regulatory positioning is unusually strong for the size — KSM was the first company certified under Korea's new Nuclear QAP in June 2025 and holds ISO 9001/14001, AS9100, ISO/TS 16949, and KEPIC certifications — providing a meaningful barrier against new entrants in safety-critical nuclear and aerospace applications.
KSM Korea firmographics
Firmographics- Name
- KSM Korea
- Legal name
- KSM CO., LTD.
- Website
- https://ksm.co.kr
- Company type
- Private
- Founded year
- 1979
- Operating status
- Operating
- Headcount range
- 501–1,000 employees
- Short description
- KSM Korea manufactures precision sealing and thermal components — mechanical seals, welded metal bellows, fine ceramics, semiconductor heaters, and ferrofluidic seals — for semiconductor equipment makers, nuclear power plants, petrochemical operators, and aerospace programs, holding an estimated 70% global share in metal bellows.
- Ownership category
- akta.pro rank
KSM Korea industry classification
Industry- Product category
- Industrial Sealing and Heating Components
- NAICS
- Gasket, Packing, and Sealing Device Manufacturing (339991)
- SIC
- Gaskets, Packg & Sealg Devices & Rubber & Plastics Hose (3050)
- akta.pro primary industry
- Seals, Gaskets & Fluid Connectors (O-rings, packings, rotary seals, quick couplers) (IMAHAGAI)
- akta.pro secondary industry
- Seals, Valves & Auxiliary Components (for Pumps/Compressors) (IMAHANAH)
Keywords
Where KSM Korea is headquartered
LocationHeadquarters
- HQ city
- Gyeongju
- HQ country
- South Korea
- HQ region
- Asia
Offices15 records
Markets served
KSM Korea business model
Business model- GTM type
- B2B
- Offering type
- Hardware or Manufacturing
- Cost components
- Supply Chain, Technology or R&D, Personnel, Operations, Marketing or Sales, Infrastructure
Revenue model
- Industrial Component Sales: Direct B2B sales of precision engineered components including mechanical seals, bellows, ceramics, and heaters to semiconductor, nuclear, petrochemical, and general industrial customers. Revenue generated through custom orders and standard product sales.
- Custom Engineering Solutions: Design and manufacturing of customized sealing solutions and components based on customer specifications. Technical engineering services integrated with product sales.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Other | Multi-year contract | Custom quotation-based pricing |
Go-to-market motion3 records
Distribution channels4 records
Marketing channels6 records
KSM Korea product offering
Product offeringCore offering
KSM Korea manufactures and supplies precision-engineered industrial sealing and heating components including mechanical seals (compressor seals, metal bellows seals, dry gas seals, gas barrier seals, mixer seals, slurry seals, and pusher seals), welded metal bellows (for semiconductor and display manufacturing equipment), fine ceramics (silicon carbide and silicon nitride materials), semiconductor process heaters (including CVD aluminum heaters), and ferrofluidic seals using magnetic fluid technology. Products are sold directly to enterprise OEMs and operators in semiconductor, nuclear power, petrochemical, aerospace, and general industrial sectors through quote-based B2B engagements supported by a Quick Response Center (QRC) network across Korea and international subsidiaries in the USA, Japan, and Vietnam.
Product overview
KSM Korea operates as a multi-division industrial components manufacturer with three main business units: FLOWSERVE KSM (Mechanical Seal Division) specializing in mechanical seals for pumps, compressors, and rotating equipment along with Fine Ceramics; KSM (Bellows Division) focused on Welded Metal Bellows for semiconductor, display, and industrial applications; and KSM Component specializing in Heaters for semiconductor manufacturing and Ferrofluidic Seals using magnetic fluid technology. The company serves semiconductor, nuclear power, petrochemical, aerospace, display manufacturing, and general industrial sectors with precision-engineered sealing and thermal components. KSM's product portfolio includes over 50 distinct product lines ranging from miniature ferrofluidic seals (SML series with 4-6mm shaft) to large industrial mechanical seals, Fine Ceramics materials (SiC1, SiC2, LP-SiC, Si3N4), and specialized heaters operating at up to 400°C for CVD processes.
Differentiator
Problem solved
Functional benefit
Products and services
- Mechanical Seals (Compressor, Metal Bellows, Gas Barrier, Dry Gas, Mixer, Slurry, Pusher types)
- Welded Metal Bellows
- Fine Ceramics — SiC1, SiC2, LP-SIC, and Si3N4
- Semiconductor Heaters (including CVD Process Aluminum Heater)
- Ferrofluidic Seals (SML, SSL, SNL/SNF, STL/STF, SFL/SFF, SFL Heavy Duty, HTL, HFL, PD series)
- RCP Mechanical Seal for Korean Space Launch Vehicle (KSLV-II / Nuri)
Quantifiable outcome
- 70% global market share in Metal Bellows
- +3 more outcomes
Companies that use KSM Korea
Customer profileNamed customers6 records
Segments5 records
Ideal customer profiles5 records
KSM Korea technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature5 records
KSM Korea partnerships and signals
Strategic signalPartnerships
Four partnerships are on record, tiered core and minor.
- FLOWSERVE (formerly DURAMETALLIC)coreJoint venture agreement signed in 1990 with US DURAMETALLIC (now FLOWSERVE) for technology capitalization. This partnership established Korea Seal Master and enabled technology transfer for mechanical seal development. The relationship has evolved into a strategic partnership with FLOWSERVE KSM now operating as the mechanical seal division.
- FerrotecminorListed as a partner site on KSM Component website, indicating a collaborative relationship in the semiconductor equipment component ecosystem.
- DuPontminorListed as a partner site on KSM website, indicating a collaborative relationship in the industrial components ecosystem.
- US METAL FABminorTechnical cooperation with US METAL FAB established in 1994 for bellows technology development.
Scale indicators9 records
Recent moves7 records
Expansion highlights6 records
KSM Korea competitors and assessment
Company assessmentDirect peers
- Flowserve Corporation: Global leader in pumps, valves, and mechanical seals. Direct parent and operating partner of KSM Korea's mechanical seal division (FLOWSERVE KSM). Directly comparable in mechanical seals for pumps and compressors, particularly in oil & gas and power generation.
- John Crane: Subsidiary of Smiths Group and one of the world's largest mechanical seal and rotating equipment solutions providers. Directly competes with KSM/FLOWSERVE KSM in API 682 mechanical seals, dry gas seals, and compressor seals for petrochemical and power customers.
- EagleBurgmann: Part of the Freudenberg Group, EagleBurgmann is a global leader in mechanical seals, sealing supplies, and bellows technology. Closely comparable to KSM across mechanical seals, metal bellows seals, and industrial sealing for pumps and compressors.
- Ferrotec Corporation: Listed by KSM as a partner site; Ferrotec manufactures ferrofluidic seals and vacuum feedthroughs that directly overlap with KSM Component's ferrofluidic seal line. Competes in semiconductor and display equipment sealing.
Broad incumbents
- EnPro Industries (Garlock): EnPro's Garlock family of brands produces gaskets, sealing products, and fluid handling products for industrial markets. Comparable in industrial sealing solutions, though broader portfolio and not specialized in semiconductor or nuclear niches like KSM.
- Trelleborg Sealing Solutions: Division of Trelleborg AB, a global leader in polymer technology and engineered seals. Comparable in precision seals, O-rings, and engineered sealing components, though focused on elastomer/polymer products rather than metal bellows.
- Senior plc: UK-based engineered solutions provider with a Flexonics division that manufactures metal bellows and expansion joints. Comparable in welded metal bellows for industrial and aerospace applications, though Senior operates as a diversified industrial group.
Emerging players
- Bal Seal Engineering: Specialist in precision seals, spring-energized seals, and conductive polymer components. Comparable in niche high-performance sealing for medical, semiconductor, and industrial applications, though smaller and US-focused.
- MDC Vacuum Products: Manufacturer of vacuum components, flanges, fittings, and bellows used in semiconductor, research, and industrial vacuum systems. Directly comparable in welded metal bellows for vacuum applications, though primarily a US-based specialty player.
- AP Tech: Manufacturer of bellows sealed valves, pressure regulators, and vacuum components for semiconductor and industrial gas applications. Comparable in welded bellows and precision components for semiconductor process equipment, though narrower in scope.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat6 records
Key risks7 records
Key highlights7 records
Customer concentration
KSM Korea social profiles
Digital presenceKSM Korea compliance and trust
Trust signalCompliance10 records
KSM Korea financial estimates
Financial estimateRevenue estimate
Valuation estimate
KSM Korea leadership team
Management profileNumber of profiles
Profiles7 records
KSM Korea subsidiaries and ownership
Company hierarchySubsidiaries4 records
KSM Korea funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
KSM Korea M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about KSM Korea
What does KSM Korea do?
KSM Korea manufactures and supplies precision-engineered industrial sealing and heating components including mechanical seals (compressor seals, metal bellows seals, dry gas seals, gas barrier seals, mixer seals, slurry seals, and pusher seals), welded metal bellows (for semiconductor and display manufacturing equipment), fine ceramics (silicon carbide and silicon nitride materials), semiconductor process heaters (including CVD aluminum heaters), and ferrofluidic seals using magnetic fluid technology. Products are sold directly to enterprise OEMs and operators in semiconductor, nuclear power, petrochemical, aerospace, and general industrial sectors through quote-based B2B engagements supported by a Quick Response Center (QRC) network across Korea and international subsidiaries in the USA, Japan, and Vietnam.
Is KSM Korea a public or private company?
KSM Korea is a private company. It is classified as corporate owned and is currently operating.
When was KSM Korea founded?
KSM Korea was founded in 1979. It employs 501 to 1,000 people.
Where is KSM Korea based?
KSM Korea is headquartered in Gyeongju, South Korea, in the Asia region.
How does KSM Korea make money?
Two revenue lines are on record. Industrial Component Sales are the primary driver. The others are custom Engineering Solutions.
Who are KSM Korea's main competitors?
Direct peers on record are Flowserve Corporation, John Crane, EagleBurgmann and Ferrotec Corporation. Broad incumbents are EnPro Industries (Garlock), Trelleborg Sealing Solutions and Senior plc. Emerging players are Bal Seal Engineering, MDC Vacuum Products and AP Tech.
Does KSM Korea have an API?
No public API is recorded for KSM Korea.
What industry is KSM Korea in?
KSM Korea's product category is Industrial Sealing and Heating Components. Its primary akta.pro industry code is IMAHAGAI, Seals, Gaskets & Fluid Connectors (O-rings, packings, rotary seals, quick couplers), with a secondary code of IMAHANAH, Seals, Valves & Auxiliary Components (for Pumps/Compressors). Its NAICS code is 339991 and its SIC code is 3050.