Mibos

What Mibos does

Mibos Metal İşleme Boyama San ve Tic. A.Ş. (trading as Mibos) is a Turkish manufacturer of accessories and protection components for oil-filled distribution and power transformers, headquartered in Pendik, Istanbul, and operating as part of the Maier Group (Maier GmbH). The company was established approximately 25 years ago and holds ISO 9001:2008/2018 certification. Its product portfolio spans butterfly valves (Kelebek Vanalar) manufactured to DIN 42560, protection relays (Koruma Rölüleri) including the Buchholz MBP and the all-in-one MCHD Protection Block, oil level indicators for hermetically sealed and expansion-tank transformers, air dryers in multiple size classes, pressure relief valves (PRD and MPRV) with adjustable set points between 20 and 70 kPa, tank accessories, and commutators.

The underlying technology is fundamentally electromechanical, with components designed to DIN and EN specifications (DIN 42560, DIN 42548, DIN 42551, DIN 42553, DIN 42558, EN 50216-4) and engineered so that consumable and serviceable parts — notably butterfly-valve internals — can be replaced without draining insulating oil or disassembling the transformer. The business model is straightforward B2B hardware sales: Mibos sells quote-based directly to transformer manufacturers (primary segment) and to transformer maintenance providers via phone, email, web chat, and a multilingual product catalog website. Pricing is not publicly disclosed. Geographic reach is anchored in EMEA, with distribution leverage from being embedded within the Maier Group, which maintains German roots and an international presence across Turkey and Germany. Mibos does not disclose revenue, customer counts, or headcount beyond a 101–250 employee band, and relies on standards-compliance and long-tenured OEM relationships rather than disclosed marquee customer logos to win specification-driven orders.

Name

Mibos

Legal name

Mibos Metal İşleme Boyama San ve Tic. A.Ş.

Website

https://mibos.com

Company type

Private

Founded year

1996

Operating status

Operating

Headcount range

51–100 employees

Short description

Mibos is a Turkish manufacturer of electromechanical accessories for oil-filled transformers — butterfly valves, Buchholz and MCHD protection relays, oil level indicators, air dryers, and pressure relief valves — selling directly to transformer OEMs and maintenance providers in the EMEA market under the Maier Group.

Ownership category

akta.pro rank

Product category

Transformer Accessories

NAICS

Power, Distribution, and Specialty Transformer Manufacturing (335311)

SIC

Power, Distribution & Specialty Transformers (3612)

akta.pro industry

PRIMARYIMAGAAAA

Transformers (Power, Distribution, Instrument, Specialty)

Industrials, Manufacturing & Construction/Electrical Equipment & Industrial Electronics/Power Generation & Grid Equipment (Transformers, Switchgear, Substations)

Keywords

• Transformer accessories
• Butterfly valves
• Protection relays
• Oil level indicators
• Pressure relief valves

Headquarters

HQ city

Pendik

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, Others

Revenue model

1. Transformer Accessories Sales: Mibos generates revenue through the manufacture and sale of transformer accessories including butterfly valves, protection relays, oil level indicators, pressure valves, air dryers, and tank accessories. The company serves transformer manufacturers directly with a focus on reliability, punctuality, and short delivery times.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels3 records

Core offering

Mibos manufactures and sells mechanical and electromechanical accessories for oil-filled transformers under its own brand and as part of the Maier Group. Its portfolio includes butterfly valves (Kelebek Vanalar), protection relays (Koruma Rölüleri), oil level indicators (Yağ Seviye Göstergeleri), air dryers (Hava Kurutucuları), pressure relief valves (Basınç Valfleri — PRD and MPRV), tank accessories (Kazan Aksesuarları), and commutators (Komütatörler). These components are sold directly to transformer manufacturers and industrial customers for the protection, monitoring, and maintenance of oil-filled power and distribution transformers.

Product overview

Mibos is a manufacturer of oil-filled transformer accessories with over 25 years of experience. The product portfolio centers on core mechanical and electromechanical components including butterfly valves (Kelebek Vanalar), protection relays (Koruma Rölüleri), oil level indicators (Yağ Seviye Göstergeleri), air dryers (Hava Kurutucuları), pressure relief valves (Basınç Valfleri), tank accessories (Kazan Aksesuarları), and commutators (Komütatörler). The product line includes specialized variants such as the Buchholz Relay MBP for distribution and power transformers, the MCHD Protection Block offering all-in-one protection for hermetically sealed transformers monitoring oil temperature, level, pressure and gas formation, and the Bimetal Thermometer MBT for temperature monitoring. Products are available in multiple configurations and sizes to serve various transformer types and applications.

Differentiator

Problem solved

Functional benefit

Products and services

• Butterfly Valves (Kelebek Vanalar) Butterfly valves for oil-filled transformers, available in welding-neck flange and intermediate flange variants per DIN 42560. Parts can be replaced without removing insulating fluid or components from the expansion tank. Sold to transformer manufacturers and maintenance providers.
• Protection Relays (Koruma Rölüleri) Protection relays that detect and prevent potential transformer damage by monitoring faults. Variants are tailored to different transformer types and applications, including the Buchholz Relay MBP for distribution and power transformers and the MCHD all-in-one block for hermetically sealed transformers.
• Oil Level Indicators (Yağ Seviye Göstergeleri) Oil level indicators for hermetically sealed and expansion tank transformers, available in multiple configurations to monitor oil levels during operation. Includes a Magnetic Oil Level Indicator variant covered by a separate Certificate of Compliance.
• Air Dryers (Hava Kurutucuları) Air dryers for oil-filled transformers and butterfly-wheel expansion tanks, offered in multiple sizes (Type L and Type A/B/C variants) and configurations for varied transformer applications.
• Pressure Relief Valves (Basınç Valfleri — PRD and MPRV) Pressure relief valves (PRD and MPRV) for transformer protection against overpressure, available in different sizes with adjustable pressure settings of 20–70 kPa. Covered by a Certificate of Compliance for PRV 50 80 variants.
• Tank Accessories (Kazan Aksesuarları) Tank accessories including oil drainage applications, Bock relays, thermometer pockets, and shut-off parts used in transformer maintenance and operation. The Bimetal Thermometer MBT is offered for temperature monitoring within this category.
• Commutators (Komütatörler) Commutator devices for transformer applications, marketed as part of Mibos' accessory portfolio for transformer manufacturers.
• MCHD Protection Block (Koruma Bloğu MCHD) An all-in-one protection relay for hermetically sealed transformers that monitors oil temperature, oil level, high pressure, and gas formation. Designed for durability in harsh operating conditions. Sold to transformer OEMs.
• Buchholz Relay MBP (Buchholz Röle MBP) A completely redesigned Buchholz relay for distribution and power transformers. Positioned as robust and reliable, expanding the company's range of protection relays. Covered by a Certificate of Compliance for Relays of Transformers.

Quantifiable outcome

• Parts can be replaced without removing insulating fluid or removing parts from expansion tank and boiler

Segments2 records

Ideal customer profiles2 records

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.

• Maier GroupcoreStrategic or Co-development PartnerMibos is part of the Maier Group, a multinational company group. Maier Group operates internationally with German roots (Maier GmbH), providing Mibos with corporate backing and potential access to broader distribution networks. The group includes companies like Maier Accessories and operates across Turkey and Germany with multilingual web presence.

Scale indicators1 record

Recent moves5 records

Expansion highlights4 records

Direct peers

• Trench Group (Siemens Energy): Acquired by Siemens Energy, Trench is a specialist in instrument transformers and coil products used inside power and distribution transformers. Comparable niche specialty manufacturer serving the same transformer OEM customer base, though with a different component mix than Mibos.
• Maschinenfabrik Reinhausen: German-based global market leader in transformer regulation equipment (on-load tap changers) and a closely comparable product line of transformer protection accessories. Directly competes with Mibos for the same utility and transformer-OEM customers in protection relays and related oil-transformer components.
• Weidmann (Hitachi Energy): Weidmann (now part of Hitachi Energy) historically specialized in transformer insulation, accessories, and monitoring components. Closely comparable on technology and end customers; now incorporated into a much larger transformer OEM, but operationally a direct peer in the accessories category.
• Pfiffner Group: Swiss manufacturer of transformer components including Buchholz relays, pressure relief devices, and oil level indicators — effectively a direct product-overlap peer to Mibos in the transformer accessories niche. Comparable European specialist serving similar OEM and utility customers with a narrower but adjacent portfolio.

Broad incumbents

• Siemens Energy: Major transformer OEM and services provider. Operates broadly in the same electrical equipment space as Mibos, including transformer service and accessory offerings bundled into large grid projects — a wide-portfolio incumbent relevant to how Mibos's products reach end utilities.
• ABB: Global electrical equipment major with a large transformer manufacturing footprint. Not a niche peer, but a competing supplier of complete transformers and bundled accessories to the same utility customers; relevant for understanding incumbent competitive dynamics around Mibos's customer base.
• GE Vernova: GE's grid and transformer business, a broad incumbent competing in transformer manufacturing and service. Comparable only at the industry level, but a relevant reference point for OEM market dynamics that affect Mibos's addressable customer set.
• Hitachi Energy: One of the world's largest transformer manufacturers and the parent of Weidmann. Competitively relevant as the OEM that both consumes and competes with specialty accessory suppliers like Mibos across utility and industrial transformer markets.

Others

• Schneider Electric: Global electrical equipment, automation, and energy management major. Not a direct transformer accessories competitor, but a relevant adjacent player frequently specified by the same utility customers; useful as a context peer for ecosystem and adjacent-market dynamics.

Regional players

• ELIN Motoren (RENK Group): Austrian/German specialty motor and transformer components manufacturer. Comparable niche player in adjacent electromagnetic and transformer-related components, primarily serving European markets similar to Mibos's EMEA footprint.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks5 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/mibos-metal-ltd.sti.

Compliance4 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 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 Mibos