What STAR does

STAR Turbine, Inc. is a privately held U.S. manufacturer founded in 1988 and headquartered in a 68,000 square foot facility in Marion, Ohio, specializing in custom-engineered turbine packing rings, seals, and spill strips for the steam turbine aftermarket. The company designs and produces five core product families — conventional seals, retractable seals, sensitized seals, spill strips, and J-strips — manufactured from OEM-grade metals and supported by an in-house distortion assessment service and nationwide on-site installation crews. Its core customers are North American power generation utilities, independent power producers, energy-from-waste operators, and turbine OEMs seeking replacement parts and efficiency upgrades during planned outages.

The company's business model combines custom hardware manufacturing with professional services. Revenue is generated primarily through quote-based sales of precision-machined seal components, with secondary streams from on-site field installation performed by in-house machinists and from engineering distortion assessment services. STAR holds exclusive distribution rights for Mitsubishi, Alstom, and Siemens J-strips across North and South America, and has completed over 500 installs since founding, with its retractable packing rings field-proven in more than 800 turbine units. Customer testimonials from major utilities and OEMs (Dominion, GE, AEP, Toshiba, Covanta, Fieldcore, Dynegy, Luminant) emphasize manufacturing flexibility, transparent and competitive pricing, aggressive-deadline responsiveness, and subject-matter expertise as recurring purchase drivers.

Go-to-market is direct enterprise field sales, supported by ISNetWorld, OSHA, AVETTA, and OEM certifications that qualify the company as an approved vendor at utility procurement systems. Marketing relies on customer testimonials, OEM client logos, and website-based lead capture rather than paid digital channels. In December 2023, STAR formed a strategic alliance with sister company THOR Precision, LLC, a Greenville, SC-based manufacturer of specialty aftermarket gas turbine hardware, positioning STAR within a broader turbine aftermarket portfolio under common ownership and opening cross-sell into the gas turbine segment.

Name

STAR

Legal name

STAR Turbine, Inc.

Website

https://starturbine.com

Company type

Private

Founded year

1988

Operating status

Operating

Headcount range

11–50 employees

Short description

STAR Turbine, Inc. is a privately held U.S. manufacturer, founded 1988 in Marion, Ohio, that designs, produces, and installs custom steam turbine packing rings, seals, and spill strips for North American power generation utilities, OEMs, and energy-from-waste operators.

Ownership category

akta.pro rank

Product category

Industrial Turbine Parts Manufacturing

NAICS

Turbine and Turbine Generator Set Units Manufacturing (333611)

SIC

Engines & Turbines (3510), Metalworkg Machinery & Equipment (3540)

akta.pro primary industry

Steam Turbines & Turbogenerators (IMAHAFAB)

akta.pro secondary industries

Cooling, Water/Steam Cycle & Balance-of-Plant Retrofits (Condensers, Cooling Towers) (EUAEALAK), Seals, Gaskets & Fluid Connectors (O-rings, packings, rotary seals, quick couplers) (IMAHAGAI)

Keywords

• Steam turbine seals
• Turbine packing rings
• Turbine aftermarket parts
• Spill strips manufacturing
• Turbine installation services

Headquarters

HQ city

Marion

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Turbine Parts Manufacturing and Sales: Custom designed, manufactured, and installed turbine packing rings and associated hardware. Products include conventional seals, retractable seals, sensitized seals, spill strips, and J-strips. Manufactured from OEM-grade metals.
2. On-site Installation Services: Field crew installation services with machinists traveling nationwide to custom fit turbine parts. Includes proper installation consultation and execution.
3. Distortion Assessment Services: Engineering assessment services including diaphragm measurements, rotor measurements, and seal analysis to help minimize losses and improve turbine efficiency.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels3 records

Core offering

STAR Turbine designs, manufactures, and installs custom steam turbine packing rings, seals, and spill strips from OEM-grade metals to restore and improve turbine efficiency. Its core offering spans conventional seals, retractable seals, sensitized seals, spill strips, and J-strips, complemented by distortion assessment engineering and on-site field installation services. The company is the exclusive North and South American distributor of Mitsubishi, Alstom, and Siemens J-strips.

Product overview

STAR Turbine offers a portfolio of custom-engineered turbine parts and related services focused on maximizing turbine efficiency. The core product line consists of five types of precision-machined seals: Conventional Seals (standard packing rings), Retractable Seals (with spring-loaded clearance adjustment), Sensitized Seals (with coil spring floating segments), Spill Strips (bronze and diaphragm steam deflectors), and J-Strips/J-Seals (exclusive distribution for North and South America). These products are complemented by Distortion Assessment services (turbine ring measurement and analysis) and professional Installation Services (on-site custom fitting by field crews). The portfolio centers on addressing steam leakage and packing rub issues to improve heat rate and power output.

Differentiator

Problem solved

Functional benefit

Products and services

• Conventional Packing Ring Seals Custom-designed steam turbine packing rings manufactured with OEM-specified raw materials and customized to fit specific turbine specifications. Each part is 100% inspected before shipping and is intended for power plant and utility customers replacing worn steam turbine seals.
• Retractable Steam Turbine Seals Spring-loaded packing rings designed with greater radial clearance at turbine start-up that close to the desired clearance as steam flow increases, avoiding rotor contact. Field proven in over 800 units, with claimed improvements of 1%-2% in heat rate and 2%-3% in kw output for power plant and utility customers.
• Sensitized Steam Turbine Packing Seals Floating packing ring segments mounted on sensitized coil springs that yield on rotor contact to reduce steam leakage and packing tooth wear by 50%, with no modifications required to the rotor or packing holders. Field proven in both the U.S. and China for power generation operators.
• Spill Strips Conventional spill strips manufactured with OEM-specified raw materials and precision machined to client specifications, including bronze spill strips/steam deflectors and diaphragm steam turbine spill strips. Sold to power plants and OEMs replacing spill strips on steam turbines.
• J-Strips and Seals Exclusive supply of stationary and rotating J-Strip for all North and South America, plus state-of-the-art rolling capability for J-Strip, L-Strip, and U-Strip profiles from an extensive raw material inventory meeting OEM specifications. Sold to power plants, utilities, and OEMs requiring OEM-spec strip profiles.
• Distortion Assessment Service Four-part engineering assessment covering diaphragm and packing measurements, rotor measurements, and turbine packing ring and spill strip analysis to minimize losses and improve steam turbine efficiency. Sold to power plant operators and turbine service organizations.
• On-Site Turbine Installation Services Field crew installation services with machinists traveling nationwide to custom-fit turbine packing rings, seals, and spill strips. Uses a proprietary installation process including upper half pins and retaining keys to set proper axial and radial clearance. Sold to power plants, utilities, and OEMs against aggressive outage schedules.

Quantifiable outcome

• Over 500 installs performed since 1988
• +4 more outcomes

Named customers13 records

Segments1 record

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Partnerships

Four partnerships are on record, tiered core.

• THOR Precision, LLCcoreStrategic or Co-development Partner · 1 December 2023In December 2023, STAR joined forces with its Greenville, SC-based sister company THOR Precision, LLC. THOR is a leading manufacturer of specialty, aftermarket hardware for gas turbines. The partnership brings added capabilities enabling both companies to better serve customers with a broader array of quality turbine parts.
• MitsubishicoreChannel Partner/ Reseller/ DistributorSTAR is the exclusive distributor of Mitsubishi J-strips in North America and South America.
• AlstomcoreChannel Partner/ Reseller/ DistributorSTAR is the exclusive distributor of Alstom J-strips in North America and South America.
• SiemenscoreChannel Partner/ Reseller/ DistributorSTAR is the exclusive distributor of Siemens J-strips in North America and South America.

Scale indicators5 records

Recent moves6 records

Expansion highlights5 records

Broad incumbents

• Sulzer: Global independent turbine and rotating equipment services business with a strong steam and gas turbine aftermarket offering, including seals and packing rings. Comparable as an independent, full-scope aftermarket specialist competing for similar utility/IPP work.
• Chromalloy: Large independent aerospace and industrial gas turbine aftermarket parts manufacturer with castings, coatings, and replacement parts. Overlaps with STAR on specialized turbine hardware supplied to OEMs and operators.
• Elliott Group: Major turbomachinery OEM and aftermarket services provider. Overlaps with STAR on replacement parts, packing rings, and field service for steam turbines, and is also a STAR customer, mixing partnership and competition.
• GE Vernova Power Services: Steam turbine OEM and aftermarket services arm, providing packing rings, seals, and outage support through factory and Fieldcore channels. Direct overlap with STAR in serving US utility customers.
• Siemens Energy Service: OEM parent of one of STAR's J-strip principals, with a global steam and gas turbine service network that also supplies seals and packing rings. An incumbent competitor and channel partner simultaneously.

Regional players

• Holtec International / Sematoll (turbine services): Provides turbine and power plant maintenance services and specialty components to the nuclear and fossil utility segment; competes for similar steam turbine seal and packing replacement programs.

Direct peers

• Turbine Technology Services (TTS): Independent steam turbine services and parts company specializing in turbine repair, rotor refurbishment, and packing/seal replacements. Direct competitor in the OEM-grade steam turbine aftermarket niche.
• EthosEnergy: Independent turbine aftermarket services provider focused on steam and gas turbine maintenance, repair, and parts. Competes with STAR for outage-driven packing ring and seal replacement work at US utilities and IPPs.
• Mechanical Dynamics and Analysis (MDA): Steam turbine-focused engineering and field services firm offering outage support, vibration analysis, and turbine component repair comparable to STAR's distortion-assessment and on-site installation services.
• THOR Precision: Direct peer: sister company under the same ownership umbrella as STAR, specializing in specialty aftermarket hardware for gas turbines. Forms the other half of the STAR-THOR/PowerParts Group turbine aftermarket platform.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights6 records

Customer concentration

• Facebookfacebook.com/SteamTurbineSeals

Compliance5 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles5 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 STAR