Inpro/Seal LLC

What Inpro/Seal LLC does

Inpro/Seal LLC, headquartered in Rock Island, Illinois, is the inventor and manufacturer of the Bearing Isolator category of permanent bearing protection devices, founded by David C. Orlowski in 1977 following the 1975 invention. The company designs and produces custom-engineered, non-contacting compound labyrinth seals, articulating shaft seals (Air Mizer), floating brush seals (Sentinel), and shaft grounding solutions for rotating equipment used across oil and gas, power generation, mining, chemical processing, food and beverage, pulp and paper, steel, and electric vehicle motor applications. Its technology centers on unitized stator/rotor designs with no wearing parts intended to last equipment lifetime, supported by 79 patents and more than 90,000 custom engineering designs.

Inpro/Seal operates as a wholly-owned subsidiary of Dover Precision Components, itself an operating company of publicly-traded Dover Corporation (NYSE: DOV), following its 2009 acquisition by Waukesha Bearings Corporation and subsequent 2018 unification with Waukesha Bearings, Bearings Plus, and Cook Compression. The firm runs dual manufacturing footprints in Rock Island, USA and Glasgow, UK, supporting global same-day shipment of most part numbers. Distribution combines localized field sales representatives, an inside sales team, and a self-serve e-commerce marketplace (marketplace.inpro-seal.com), with standards-association memberships and tradeshow presence as supporting channels.

Name

Inpro/Seal LLC

Legal name

Inpro/Seal LLC

Website

https://inpro-seal.com

Company type

Private

Founded year

1977

Operating status

Operating

Headcount range

101–250 employees

Short description

Inpro/Seal LLC designs and manufactures custom-engineered non-contacting bearing isolators, shaft seals, and shaft grounding solutions for rotating equipment used in oil and gas, power generation, mining, chemical, food and beverage, pulp and paper, steel, and electric vehicle applications worldwide.

Ownership category

akta.pro rank

Product category

Industrial Sealing and Bearing Protection

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 industries

Seals, Valves & Auxiliary Components (for Pumps/Compressors) (IMAHANAH), Seals, Gaskets & O-Rings (Industrial Elastomer) (IMANALAC)

Keywords

• Bearing isolators
• Shaft seals
• Bearing protection
• Shaft grounding
• Industrial seals

Headquarters

HQ city

Rock Island

HQ country

United States

HQ region

North America

Offices2 records

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 Sealing Components: Sale of custom-engineered bearing isolators, shaft seals, and shaft grounding products for rotating equipment across multiple industries. Products are custom engineered to fit exact equipment and environment requirements.

Pricing tiers

Go-to-market motion3 records

Distribution channels4 records

Marketing channels6 records

Core offering

Inpro/Seal LLC designs, engineers, and manufactures permanent non-contacting bearing isolators, shaft seals, and shaft grounding products for rotating industrial equipment. The product portfolio centers on four lines: Bearing Isolators, Air Mizer Shaft Seals, Shaft Grounding Solutions, and Sentinel Floating Brush Seals, each custom-engineered to specific equipment and operating environments and sold to industrial enterprises across chemical processing, oil and gas, power generation, mining, food and beverage, pulp and paper, steel and metal production, and electric vehicle industries.

Product overview

Inpro/Seal LLC offers a portfolio of permanent bearing protection and complete shaft sealing solutions for rotating equipment across multiple industries. The product portfolio centers on four core product lines: Bearing Isolators (including VB45-S, VB45-U, VB45-PB, mini66, VBMag, Steam Turbine, PMR, and STS variants) that provide non-contacting labyrinth seal protection against contamination and lubrication loss; Shaft Grounding Solutions (CDR, Smart MGS, Smart Ground Monitor) that protect against damaging electrical currents from VFDs; Air Mizer Shaft Seals (including Smooth Bore, Heavy Duty, Food Grade, Rotary Valve, CEMA, and Control Panel variants) that eliminate product leakage through non-contacting positive purge technology; and Sentinel Floating Brush Seals for steam turbine applications. These products are custom-engineered to fit specific equipment and operating environments, with same-day shipment capabilities on most products.

Differentiator

Problem solved

Functional benefit

Brands

• Air Mizer: Permanent shaft seal product line for eliminating product leakage and contamination on industrial processing equipment
• Sentinel FBS
• Smart Shaft Grounding
• AM Solutions
• VB45-S
• mini66
• VBMag

Products and services

• Bearing Isolators Non-contacting compound labyrinth seals that permanently protect rotating equipment from contamination ingress and lubrication loss for industrial customers operating pumps, motors, pillow blocks, gearboxes, and other rotating machinery.
• Air Mizer Shaft Seals Permanent non-contacting shaft seals that use articulating positive purge technology to eliminate product loss and contamination on industrial process equipment, accommodating radial run-out, axial movement, and angular misalignment. Available in Smooth Bore, Heavy Duty, Food Grade, Rotary Valve, CEMA, and Control Panel variants.
• Shaft Grounding Solutions Shaft grounding solutions that divert harmful shaft currents away from bearings to ground in VFD-driven motors, preventing electrical discharge machining (EDM) damage and extending bearing life. Product line includes CDR Current Diverter Ring, Smart MGS Motor Grounding Seal, and Smart Ground Monitor for condition monitoring.
• Sentinel Floating Brush Seal (FBS) Floating brush seal that serves as a drop-in replacement for carbon rings on process steam turbines, reducing steam leakage, enhancing sealing effectiveness, and extending maintenance intervals.

Quantifiable outcome

• Significantly increases mean time between repair (MTBR)
• +3 more outcomes

Named customers2 records

Segments8 records

Ideal customer profiles8 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Partnerships

Seven partnerships are on record, tiered core and minor.

• Dover Precision ComponentscoreStrategic or Co-development Partner · 1 January 2018Inpro/Seal is unified under the umbrella of Dover Precision Components along with Waukesha Bearings, Bearings Plus, and Cook Compression to supply reliability and efficiency solutions for rotating and reciprocating machinery. The operating company leverages collective strength and heritage.
• FW MurphyminorStrategic or Co-development Partner · 1 January 2018FW Murphy became part of the Dover Precision Components operating unit of Dover Corporation in 2023, expanding the portfolio of solutions for rotating equipment reliability.
• Hydraulic Institute (HI)minorStrategic or Co-development PartnerGlobal authority on pumps and pumping systems. Inpro/Seal is a member taking leadership role in establishing industry standards, best practices and education.
• Electrical Apparatus Service Association (EASA)minorStrategic or Co-development PartnerLeader in the electrical and mechanical apparatus sales, service and repair industry. Inpro/Seal is a member to establish industry standards and best practices.
• Conveyor Equipment Manufacturers Association (CEMA)minorStrategic or Co-development PartnerServes the manufacturers and designers of conveyor equipment worldwide. Inpro/Seal develops products like AM CEMA shaft seal to meet CEMA specifications.
• National Tooling and Machining Association (NTMA)minorStrategic or Co-development PartnerNational representative of the precision custom manufacturing industry. Inpro/Seal is a member contributing to industry standards.
• EMEA Power Transmission Distributors Association (EPTDA)minorStrategic or Co-development PartnerLargest organization in EMEA of distributors and manufacturers of mechanical power transmission and motion control products. Inpro/Seal is a member.

Scale indicators5 records

Recent moves9 records

Expansion highlights6 records

Direct peers

• John Crane: John Crane (part of Smiths Group) is a global leader in mechanical seals and sealing systems for rotating and reciprocating equipment in pumps, compressors, and turbines — directly comparable to Inpro/Seal's bearing isolator and shaft seal portfolio.
• AESSEAL: AESSEAL is one of the world's largest mechanical seal manufacturers serving pumps, compressors, and rotating equipment in process industries — overlapping closely with Inpro/Seal in chemical, oil & gas, and water/wastewater verticals.
• EagleBurgmann: EagleBurgmann is a leading manufacturer of mechanical seals and supporting sealing technology for pumps, compressors, and reactors, addressing the same rotating-equipment reliability pain points targeted by Inpro/Seal's bearing isolators.
• Garlock Sealing Technologies: Garlock (part of Enpro Industries) manufactures gaskets, packing, and sealing devices for industrial process equipment — a close analogue to Inpro/Seal's custom-engineered sealing solutions for similar heavy-industry end users.
• A.W. Chesterton: Chesterton manufactures mechanical seals, packing, and industrial gaskets for pumps and rotating equipment, serving overlapping customers in chemical processing, power, and general industrial markets where Inpro/Seal also competes.
• Trelleborg Sealing Solutions: Trelleborg's sealing solutions business produces elastomer O-rings, rotary seals, and engineered sealing components for fluid handling and rotating machinery applications, directly overlapping with Inpro/Seal's elastomer-based labyrinth and shaft seals.

Broad incumbents

• Parker Hannifin: Parker Hannifin's Industrial Sealing Division supplies O-rings, gaskets, and elastomer seals across many industries — a broad incumbent with overlapping products serving similar OEM and process-industry customers.
• Flowserve: Flowserve is a diversified fluid-handling supplier offering pumps, seals, and related services for power, oil & gas, and chemical plants, offering overlapping sealing capabilities as part of a wider portfolio that competes for the same reliability budgets.
• SKF: SKF is the world's largest bearings manufacturer and has expanded into bearing-adjacent sealing and condition-monitoring products — a broad incumbent whose integrated offering competes with Inpro/Seal's bearing protection portfolio.

Others

• Sulzer: Sulzer is a major pumps and rotating-equipment manufacturer with associated sealing technology; though primarily a pump OEM, it supplies sealing and reliability solutions into the same process-industry customer base as Inpro/Seal.

Market position

Strengths5 records

Weaknesses4 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/inpro-seal-llc

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles4 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 Inpro/Seal LLC