Sherkat Toulidi Yadaki Motor

What Sherkat Toulidi Yadaki Motor does

Sherkat Toulidi Yadaki Motor Iran (STYM), operating as STYM Engine Valves, is an Iranian privately held manufacturer of engine valves for internal combustion engines. Founded in 1980 and headquartered in Tehran with manufacturing operations in Saveh's Kaveh Industrial City, the company employs 501-1,000 people and produces a comprehensive portfolio of eight engine valve types — Monometallic, Bi-Metallic, Hard-Faced, Chromium Plated, Nitrated, Hollow Sodium Filled, Nimonic, and Inconel — for intake and exhaust applications. Its core technology is built around friction welding (14 machines), hot forging (21 machines including 6 fully automatic forging cells and 15 semi-automatic pressing/upsetter units capable of 100,000+ valves per day), Plasma Transferred Arc Welding hard-facing with cobalt-based Stellite/Eatonite/Triballoy powders, induction hardening, TUFFTRIDE nitriding, hard chrome plating (compliant with DIN 14882), and 200+ grinding and turning machines for profile, stem, groove, and seat grinding. Production nameplate capacity is 30 million engine valves per year.

The company serves five vertical segments: Automotive (primary), Locomotive, Marine, Industrial & Energy, and Heavy Duty Machinery, supplying engine valves rated for service temperatures up to 913°C (Inconel). It holds IATF 16949:2016 and ISO 9001:2015 certifications, validating its position as a qualified automotive supply chain manufacturer. STYM generates revenue through direct B2B sales to OEMs and parts suppliers; pricing is quote-based and not publicly disclosed. The go-to-market relies on international exhibitions (Automechanika Dubai, Frankfurt, and Johannesburg) to access Middle East, European, and African markets, while serving domestic Iranian automotive manufacturers as its core customer base. There is no disclosed product outside engine valves, no recorded M&A, no parent company, and no funding rounds; STYM appears to be founder/family-controlled and operates as a single-product focused manufacturer within Iran's sanctions-exposed automotive ecosystem.

Name

Sherkat Toulidi Yadaki Motor

Legal name

Sherkat Toulidi Yadaki Motor Iran (STYM)

Website

https://stymir.com

Company type

Private

Founded year

1980

Operating status

Operating

Headcount range

501–1,000 employees

Short description

STYM Engine Valves is an Iranian privately held manufacturer of internal combustion engine valves, founded in 1980, producing eight valve types for automotive, locomotive, marine, industrial, and heavy machinery OEMs at 30 million units annual capacity from Saveh.

Ownership category

akta.pro rank

Product category

Engine Valve Manufacturing

NAICS

Motor Vehicle Gasoline Engine and Engine Parts Manufacturing (336310)

SIC

Engines & Turbines (3510)

akta.pro primary industry

Internal Combustion Engine (ICE) Manufacturing (Gasoline/Diesel) (IMACAHAA)

akta.pro secondary industry

Passenger Vehicle Engine Systems Manufacturing (ICE) (IMACAAAF)

Keywords

• Engine valve manufacturing
• Automotive engine components
• Internal combustion valves
• Auto parts supplier
• Exhaust intake valves

Headquarters

HQ city

Tehran

HQ country

Iran

HQ region

Middle East

Offices3 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Engine Valve Manufacturing & Sales: Manufacture and sale of engine valves including monometallic, bi-metallic, hard-faced, chromium plated, nitrated, sodium filled, nimonic, and inconel valves for automotive, locomotive, marine, industrial and heavy duty machinery applications. Revenue generated from direct product sales to automotive manufacturers and part suppliers.

Go-to-market motion1 record

Distribution channels3 records

Marketing channels4 records

Core offering

STYM designs and manufactures engine valves for internal combustion engines used in automotive, locomotive, marine, industrial, energy, and heavy-duty machinery applications. The product range covers eight valve types — monometallic, bi-metallic, hard-faced, chromium plated, nitrated, hollow sodium filled, Nimonic, and Inconel — sold as finished B2B components to OEMs and parts suppliers.

Product overview

STYM Engine Valves is a single-product manufacturer specializing in internal combustion engine valves. The company produces a comprehensive portfolio of eight distinct valve product types—Monometallic, Bi-Metallic, Hard-Faced, Chromium Plated, Nitrated, Hollow Sodium Filled, Nimonic, and Inconel engine valves—covering intake and exhaust valve applications for Automotive, Locomotive, Marine, Industrial & Energy, and Heavy Duty Machinery sectors. With a production capacity of 30 million engine valves per year, the products are differentiated through various specialized manufacturing processes and material compositions.

Differentiator

Problem solved

Functional benefit

Products and services

• Monometallic Engine Valve Engine valve manufactured from a single steel alloy (Austenitic or Martensitic), used in gasoline and diesel internal combustion engines.
• Bi-Metallic Engine Valve Engine valve with Austenitic steel head and Martensitic steel stem joined by friction welding, combining heat/corrosion resistance with high tensile strength.
• Hard-Faced Engine Valve Engine valve with cobalt-based alloy overlay applied via PTA welding to the seat area for improved wear and high-temperature resistance.
• Chromium Plated Engine Valve Engine valve with chromium electroplating on the stem for high durability and wear resistance, compliant with DIN 14882.
• Nitrated Engine Valve Engine valve with a nitrite/nitrocarburized layer for enhanced deterioration and corrosion resistance, appearing as a dark metallic or black coating.
• Hollow Sodium Filled Engine Valve Hollow-stem engine valve filled with metallic sodium that melts and circulates at high temperatures to carry heat away from the combustion chamber, used in high-performance turbocharged engines.
• Nimonic Engine Valve Engine valve manufactured from Nimonic 80A nickel-chromium alloy for service temperatures up to 815°C, primarily used for industrial high-performance exhaust valves.
• Inconel Engine Valve Engine valve manufactured from precipitation-hardened nickel-chromium Inconel alloy, withstanding temperatures up to 913°C in lead oxide screening tests and offering corrosion resistance against sulphur in exhaust streams.

Named customers5 records

Segments5 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature7 records

Scale indicators3 records

Recent moves6 records

Expansion highlights3 records

Regional players

• Wärtsilä: Finnish manufacturer of large-bore marine and industrial engines. Comparable to STYM as a downstream customer profile (large industrial/marine engine builders requiring high-performance valves), though Wärtsilä is an engine OEM rather than a valve-only supplier.

Direct peers

• Fuji Oozx Inc. Japanese specialist manufacturer of engine valves supplying Japanese and global OEMs. Competes with STYM in the same bi-metallic and high-performance exhaust valve categories, with overlapping capabilities in friction welding and sodium-filled valves for high-temperature applications.
• Rane Engine Valve Limited: India-based publicly listed manufacturer of engine valves for passenger vehicles, commercial vehicles, and tractors. Directly comparable to STYM in core product (intake and exhaust engine valves), material technologies (bi-metallic, sodium filled, nimonic), and B2B automotive supply model. Closest global scale peer in the same niche.
• Nittan Valve Co., Ltd. Japanese specialist manufacturer of engine valves serving global OEMs. Competes head-to-head with STYM in monometallic, bi-metallic, and sodium-filled engine valves for automotive and motorcycle applications, with comparable material technologies.

Others

• Cummins Inc. U.S.-based global manufacturer of diesel and gas engines for heavy-duty, industrial, and power generation applications. While not a direct valve competitor, Cummins represents a downstream OEM customer archetype that STYM's heavy-duty valve line targets.

Broad incumbents

• Mahle GmbH: German global Tier 1 automotive supplier of engine components, pistons, valve train systems, and filtration. Overlaps with STYM in engine valves and valve train components but at much broader portfolio and global OEM scale, with extensive R&D and proprietary valve train IP.
• Tenneco / Federal-Mogul Powertrain: Global automotive Tier 1 with significant engine valve manufacturing operations across multiple geographies. Directly comparable product overlap (engine valves, valve seats) but at vastly larger scale with diversified product portfolio beyond ICE valves.
• Eaton Corporation: U.S.-based diversified industrial manufacturer with engine valve and valve train component operations. Comparable in industrial valve and engine component manufacturing capabilities, though Eaton's broader portfolio includes electrical, aerospace, and vehicle systems well beyond STYM's scope.

Market position

Strengths2 records

Weaknesses1 record

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/stym-engine-valves
• Instagraminstagram.com/stymenginevalves

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

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 →

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