Hansun Engineering

What Hansun Engineering does

Hansun Engineering Co., Ltd. (주식회사 한선엔지니어링) is a South Korean manufacturer of instrumentation tube fittings, valves, and tubing, operating under the S-LOK brand from its headquarters in the Noksan Industrial Complex, Busan. Founded in 2012 and listed on the KOSDAQ exchange under ticker 452280, the company is a subsidiary of the Korean diversified industrial group 한국선재 (Hanseon). Its catalog spans compression tube fittings (single and double ferrule), bite-type fittings compliant with DIN 2353 and JIS B2351, instrument pipe fittings, ultra vacuum, dielectric, and forged fittings, plus a broad valve family including ball/plug, needle, check/relief/excess flow, manifold/gauge, block & bleed, bleed & purge, and UHP variants, alongside accessories such as quick connectors, filters, condensate pots, sample cylinders, and precision tubing. The S-detec® sub-brand adds specialized detection/measurement products to the portfolio.

The company's technology centers on precision-engineered sealing and fluid/gas handling for industrial instrumentation. International standard compliance (DIN, JIS, SAE), UHP product variants for semiconductor and pharmaceutical clean processes, and a registered trademark on S-detec indicate competence in serving regulated industrial environments. Distribution is purely indirect-plus-direct: products are sold through a domestic distributor network (국내대리점), an overseas distributor network (해외대리점) covering at least the USA, China, Germany, and Spain, and a direct sales team reachable via [email protected] for enterprise and technical inquiries. Pricing is not publicly disclosed and is handled on a quote basis.

The business model is straightforward B2B component manufacturing: one-time product sales to industrial customers in chemical, petrochemical, semiconductor, and general manufacturing through the distributor channel, with a direct-sales overlay for larger accounts. Revenue, pricing, and detailed financial metrics are not publicly disclosed despite the KOSDAQ listing, and the company does not appear to offer software, API, or AI-enabled smart fittings based on the available material. Headcount is reported in the 51-100 range, consistent with a focused, single-site specialty manufacturer.

Name

Hansun Engineering

Legal name

HANSUN Engineering Co., Ltd. (주식회사 한선엔지니어링)

Website

https://slok.co.kr

Company type

Private

Founded year

2012

Operating status

Operating

Headcount range

51–100 employees

Short description

Hansun Engineering (한선엔지니어링) is a South Korean KOSDAQ-listed manufacturer of S-LOK instrumentation tube fittings, valves, and tubing, serving chemical, petrochemical, semiconductor, and general manufacturing customers through domestic and overseas distributor networks.

Ownership category

akta.pro rank

Product category

Industrial Instrumentation Components

NAICS

Fluid Power Valve and Hose Fitting Manufacturing (332912), Metal Valve Manufacturing (33291), Industrial Valve Manufacturing (332911)

SIC

Screw Machine Products (3451), Steel Pipe & Tubes (3317)

akta.pro primary industry

Hoses, Tubing & Fittings (Hydraulic/Pneumatic Lines & Connectors) (IMAHAGAH)

akta.pro secondary industry

Pipe Fittings, Couplings & Connectors (IMADALAD)

Keywords

• Tube fittings
• Instrumentation valves
• Ultra high purity fittings
• Process instrumentation components
• Compression fittings

Headquarters

HQ city

Busan

HQ country

South Korea

HQ region

Asia

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Industrial Instrumentation Products: Hansun Engineering generates revenue through the manufacture and sale of instrumentation tube fittings, valves, and tubing products under the S-LOK brand. Products are sold through domestic and international distributor networks, targeting industrial customers in chemical, petrochemical, semiconductor, and general manufacturing sectors.

Go-to-market motion1 record

Distribution channels3 records

Marketing channels2 records

Core offering

Hansun Engineering manufactures and sells precision instrumentation tube fittings, valves, and tubing under the S-LOK brand for industrial process control, chemical, petrochemical, semiconductor, and pharmaceutical applications. Its portfolio spans compression fittings, bite-type fittings, ultra-high-purity (UHP) fittings, instrument pipe fittings, vacuum fittings, dielectric fittings, forged fittings, and a broad valve family including ball, needle, check, relief, manifold, block & bleed, bleed & purge, and UHP variants, together with accessories such as quick connectors, filters, sample cylinders, tubing, and the S-detec sub-brand line.

Product overview

Hansun Engineering is a precision instrumentation manufacturer specializing in fittings, valves, and tubing for industrial process control applications. The product portfolio centers on the S-LOK brand tube fittings and related valve products, organized into three main categories: Fittings (tube compression fittings, bite-type fittings, UHP fittings, instrument pipe fittings, vacuum fittings, dielectric fittings, and forged fittings), Valves (ball/plug valves, needle valves, check/relief valves, manifold/gauge valves, block & bleed valves, bleed/purge valves, and UHP variants), and ETC products (quick connectors, filters, condensate pots, sample cylinders, tubing, and the S-detec branded product line). The company operates as a global leader in instrumentation tube, fitting, and valve solutions with manufacturing facilities in Busan, South Korea.

Differentiator

Problem solved

Functional benefit

Brands

• S-LOK: S-LOK is the company's primary brand for tube fittings, compression tube fittings, and instrumentation products.
• S-detec

Products and services

• S-LOK Tube Fittings High-pressure tube compression fittings featuring single and double ferrule designs for reliable sealing in instrumentation and process control applications. Targeted at industrial customers in chemical, petrochemical, semiconductor, and general process industries.
• Bite Type Tube Fittings (DIN 2353 / JIS B2351) Bite-type tube fittings engineered to DIN 2353 (European) and JIS B2351 (Japanese) standards, providing international market compatibility for instrumentation applications. Targeted at international industrial customers requiring standard-compliant bite-type fittings.
• UHP (Ultra High Purity) Fittings Clean ultra-high-purity fittings engineered for clean fluid handling in semiconductor and pharmaceutical process applications. Targeted at semiconductor fabs and pharmaceutical manufacturers requiring contamination-free fluid handling.
• Instrument Pipe Fittings Threaded fittings designed for instrument pipe connections in process control and instrumentation systems. Targeted at industrial customers requiring threaded instrument-grade pipe connections.
• Ultra Vacuum Fittings Specialized fittings engineered for ultra-high vacuum applications. Targeted at industrial and laboratory customers operating vacuum systems in instrumentation environments.
• Dielectric Fittings Fittings engineered to prevent electrical conductivity while maintaining fluid connections, used to isolate cathodic protection and stray currents in piping systems. Targeted at industrial customers with electrically sensitive process systems.
• Forged Fittings Forged construction fittings designed for high-pressure industrial applications. Targeted at process industries requiring heavy-duty pressure-rated fittings.
• Ball & Plug Valves Ball and plug valves for on/off control in instrumentation and process systems. Targeted at industrial customers requiring reliable isolation and shut-off in fluid handling lines.
• Needle Valves Precision needle and toggle valves for flow regulation and metering in instrumentation systems. Targeted at industrial customers requiring fine flow control and accurate metering.
• Check, Relief & Excess Flow Valves Check valves, relief valves, and excess flow valves for system protection and flow control in instrumentation systems. Targeted at industrial customers requiring overpressure protection and unidirectional flow control.
• Manifold & Gauge Valves Manifold and gauge valves for multi-valve assemblies used in measurement and instrumentation systems. Targeted at industrial customers requiring integrated valve manifolds for differential pressure transmitters and gauge isolation.
• Block & Bleed Valves Block and bleed valve assemblies for isolation and purging of instrumentation lines in process control systems. Targeted at industrial customers requiring safe instrument line isolation and depressurization.
• Bleed & Purge Valves Bleed and purge valves for venting, draining, and cleaning of instrumentation systems. Targeted at industrial customers requiring controlled venting of process lines.
• UHP Diaphragm Valves Ultra-high-purity diaphragm valves designed for clean semiconductor and pharmaceutical applications. Targeted at semiconductor fabs and pharmaceutical manufacturers requiring contamination-free isolation.
• UHP Bellows Valves Bellows-sealed valves for leak-tight applications in instrumentation and clean process systems. Targeted at industrial customers requiring stem-seal leak prevention.
• UHP Check Valves Ultra-high-purity check valves designed for unidirectional flow control in semiconductor process applications. Targeted at semiconductor manufacturers requiring clean-room compatible check valves.
• Quick Connectors Quick-connect couplers enabling rapid tubing connection and disconnection in instrumentation systems. Targeted at industrial customers needing fast maintenance and reconfiguration of process lines.
• Filters Filtration devices protecting instrumentation systems from particulate contamination. Targeted at industrial customers requiring inline filtration of process fluids and gases.
• Condensate Pots & Air Distribution Manifolds Condensate collection pots and air distribution manifolds used in process measurement and steam instrumentation systems. Targeted at industrial customers requiring condensate handling and pneumatic air distribution.
• Sample Cylinders Sample cylinders designed for capturing and transporting process fluid and gas samples from instrumentation systems. Targeted at industrial customers requiring safe process sample handling for laboratory analysis.
• Tubing Precision tubing for instrumentation connections, available in various materials and sizes to support compression fittings and instrumentation systems. Targeted at industrial customers requiring matched tubing for S-LOK fitting systems.
• S-detec Product Line S-detec is a registered-trademark product line of specialized detection and measurement equipment for industrial applications, including leak detection capabilities. Targeted at industrial customers requiring instrumentation-grade detection products under the S-detec brand.

Segments1 record

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

One partnership is on record.

• Korean Stock Exchange (KOSDAQ)minorOthersHansun Engineering is listed on the KOSDAQ market of the Korean Exchange, indicating corporate governance transparency and public market presence. The company is subject to KOSDAQ disclosure regulations including internal information management rules.

Scale indicators1 record

Recent moves5 records

Expansion highlights5 records

Broad incumbents

• Parker Hannifin: Large diversified industrial manufacturer with a substantial Instrumentation Products division offering tube fittings, valves, and fluid handling components. Significantly larger scale; competes directly in the same product categories.
• Festo: German global automation and pneumatic component supplier with fittings and valve offerings for industrial process and factory automation. Larger scale with overlapping fluid-control product lines.
• SMC Corporation: Japanese-headquartered global leader in pneumatic and fluid control components including fittings and valves. Broad incumbent overlapping in fluid-handling components for industrial automation.

Direct peers

• DK Tech (DK-Lok): South Korean manufacturer of compression tube fittings, valves, and instrumentation accessories. Direct domestic and international competitor with similar product breadth and distributor-led GTM.
• Hy-Lok Corporation: Korean-headquartered manufacturer of tube fittings and valves for instrumentation—direct domestic competitor with overlapping S-LOK-style product offerings and global distributor presence.
• FITOK Group: China-based manufacturer of instrumentation fittings, valves, and UHP products serving semiconductor and process industries. Closely comparable on product mix and emerging-market cost positioning.
• Swagelok Company: Global leader in instrumentation tube fittings, valves, and fluid system components—the dominant specification holder in the exact niche Hansun targets. Most directly comparable on product breadth, distributor model, and end-market focus.
• Brennan Industries (Fairview Fittings): US-based manufacturer of hydraulic adapters, fittings, and tube components for industrial fluid power. Comparable on precision metal fittings manufacturing and B2B distribution model.
• Ham-Let Group: Israeli-headquartered manufacturer of instrumentation tube fittings, valves, and UHP components for semiconductor, chemical, and oil & gas applications. Closely comparable on product mix, UHP specialization, and global distributor model.

Regional players

• WEH GmbH: German manufacturer of quick-connect couplings, fittings, and valves for instrumentation and test applications. Comparable on product technology but primarily serves European customers.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat3 records

Key risks6 records

Key highlights6 records

Customer concentration

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

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 Hansun Engineering