STB Engineering

What STB Engineering does

STB Engineering Ltd is a privately held UK engineering company founded in 1969 in Stroud, Gloucestershire, specialising in bulk materials handling and pneumatic conveying systems for process industries. The firm designs, manufactures, installs, and commissions complete end-to-end solutions covering five pneumatic conveying regimes (Dilute, Medium, Dense, and Pulse Phase, plus Pulse/Dune Flow), storage silos up to 4.2m diameter and over 20m long, weighing and feeding systems, bulk bag handling, telescopic loading spouts, and dust collection, supplemented since 2023 by a corrosion-resistant Weld Overlay Cladding service. Operations are vertically integrated in a 600m² purpose-built factory on a one-acre site, with in-house design (SolidWorks/CAD), two fabrication workshops, a dedicated cladding bay, NDT, and a small team of long-serving engineers carrying over 100 years of combined shop-floor experience. The company holds ISO 9001, BS EN 1090-2 EXC3 (since July 2024), BS EN ISO 3834-2/3 (since July 2025), ATEX, FDA/GMP/GAMP, and Safe Contractor certifications, enabling it to bid into regulated food, pharmaceutical, plastics, chemical, and mineral processing customers across the UK.

The business operates exclusively on a direct, project-based B2B model: customers engage STB for feasibility studies, custom design, fabrication, installation, and commissioning, with multi-year project cycles and ongoing service/maintenance revenue. Customer concentration is spread across named blue-chip logos including Kellogg's, Cadbury, Unilever, Warburtons, Weetabix, Heinz, DuPont, Ineos, Huntsman, Imerys, Eli Lilly, Procter & Gamble, and Johnson & Johnson, organised around four primary verticals: Food & Dairy, Plastics & Polymers, Chemicals & Minerals, and Pharmaceuticals. STB claims UK market leadership in polymer mixing plants with 70+ PVC plants installed, and its pneumatic conveying lines feed hundreds of extrusion and moulding machines. Geographic scope remains domestic UK with no disclosed international expansion; channel partnerships with Hennlich Engineering (dust collectors, loading spouts) and Arcomet7 (bag-filling machines) broaden the portfolio without internal R&D. Ownership appears to be a traditional privately held/family-managed structure with no disclosed institutional investors or parent company, and the firm has not raised external funding.

Name

STB Engineering

Legal name

STB Engineering Ltd

Website

https://stbengineering.com

Company type

Private

Founded year

1969

Operating status

Operating

Headcount range

11–50 employees

Short description

STB Engineering is a UK-based, privately held engineering firm founded in 1969 that designs, manufactures, and installs custom pneumatic conveying, silo storage, weighing, feeding, and bulk bag handling systems for enterprise customers in food, plastics, chemicals, and pharmaceutical process industries.

Ownership category

akta.pro rank

Product category

Industrial Bulk Materials Handling Equipment

NAICS

Conveyor and Conveying Equipment Manufacturing (333922), Material Handling Equipment Manufacturing (33392)

SIC

Construction, Mining & Materials Handling Machinery & Equip (3530)

akta.pro primary industry

Bulk Solids Handling & Processing Equipment (Conveying, Silo, Feeders) (IMAHAEAG)

akta.pro secondary industries

Bulk & Silo Storage (Dry Bulk) (TLALAAAH), Bulk Packaging Filling/Discharge Systems & Handling Aids (Spouts, Lifting, Dischargers) (IMALAGAI), Bulk Handling & Conveying for Processing Lines (Augers, Elevators, Conveyors) (AFAAAJAJ)

Keywords

• Pneumatic conveying systems
• Bulk materials handling
• Storage silos
• Industrial weighing systems
• Feeding equipment

Headquarters

HQ city

Stroud

HQ country

United Kingdom

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Custom Pneumatic Conveying Systems: Design, manufacture, and installation of custom pneumatic conveying systems including Dense Phase, Pulse Phase, Dilute Phase, Medium Phase, and Pulse/Dune Flow systems. Complete end-to-end project delivery from concept to commissioning.
2. Silo & Storage Vessel Manufacturing: Fabrication of bulk storage silos, tanks, hoppers, and bins in stainless steel, aluminium, and mild steel. One-off structures and special commissions. Can accommodate silos up to 4.2m diameter and over 20m in length.
3. Engineering Services & Project Management: Feasibility studies, design (3D SolidWorks & 2D CAD), installation, controls, and maintenance contracts. Complete project management from concept through to commissioning including mechanical and electrical engineering.
4. Weighing & Feeding Systems: Supply of bulk materials weighing systems including silo weigh systems, process weigh hoppers, batch weighing, loss-in-weight systems, gravimetric feeders, and automated weigh and feed control.
5. Bulk Bag Handling Equipment: Big bag (FIBC) discharge and filling systems, sack tipping stations, with automated or semi-automatic operation. Design, manufacture, and installation services.
6. Weld Overlay Cladding Services: Corrosion resistant weld overlay cladding services for pipes, valves, flanges, and complex geometries. Complimented by full NDT services, project management and documentation.
7. Service, Maintenance & Spares: Maintenance contracts, breakdown services, plant upgrades, on-site pipeline and silo maintenance, supply of spare parts for existing systems.

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels4 records

Core offering

STB Engineering designs, manufactures, and installs custom bulk materials handling and pneumatic conveying systems, including five conveying regimes (Dense Phase, Pulse Phase, Dilute Phase, Medium Phase, and Pulse/Dune Flow), storage silos up to 4.2m diameter and over 20m in length, weighing and feeding systems, bulk bag handling equipment, and telescopic loading spouts. The company provides complete end-to-end in-house project management, fabrication, installation, and commissioning services primarily for enterprise customers in food, pharmaceutical, chemical, mineral, and plastics processing industries across the UK.

Product overview

STB Engineering offers a comprehensive portfolio of bulk materials handling solutions centered on pneumatic conveying technology. The core offering consists of five pneumatic conveying regimes (Dilute Phase, Medium Phase, Pulse Phase, Pulse/Dune Flow, and Dense Phase) complemented by supporting equipment including storage silos, weighing systems, feeding systems, bulk bag handling, telescopic loading spouts, and dust collectors. The company provides complete end-to-end solutions with in-house project management, fabrication, installation, commissioning, testing, and maintenance services. Since 2023, weld overlay cladding services have been added to protect metallic components from corrosion. The company operates from its purpose-built factory in Stroud, UK, and manufactures silos and vessels using SolidWorks and CAD design.

Differentiator

Problem solved

Functional benefit

Products and services

• Pneumatic Conveying Systems Custom-engineered bulk materials handling systems that pneumatically transport granules, powders, and flakes through pipelines using air pressure. Available in five regimes: Dilute Phase, Medium Phase, Pulse Phase, Pulse/Dune Flow, and Dense Phase. Designed for enterprise process industries requiring tailored solutions for difficult materials.
• Storage Silos Bulk storage silos in carbon steel, stainless steel, and aluminium for food ingredients, plastic pellets, powders, polymers, chemicals, and minerals. Accommodates silos up to 4.2m diameter and over 20m in length, with core flow and mass flow discharge systems.
• Bulk Materials Weighing Systems Industrial weighing systems including silo weigh systems, process weigh hoppers, batch weighing equipment, and Loss-in-Weight and Gain-in-Weight gravimetric feeders for process industry customers.
• Bulk Materials Feeding Systems Bulk feeding machines including volumetric feeders, dosing screws, loss-in-weight systems, gravimetric feeders, and automated weigh and feed control systems for industrial process lines.
• Bulk Bag and Sack Handling Systems FIBC bulk bag discharge and filling systems for 1-tonne bulk bags, including automated or semi-automatic options with loss of weight, batch or continuous weighing, and accurate dosing capabilities, plus sack tipping stations.
• Telescopic Loading Spouts and Bellows Dust-free loading equipment for bulk solids into trucks, tankers, railcars, ships, and stockpiles. Includes tanker loading spouts, truck/wagon loading spouts, and combined loading spouts.
• Industrial Dust Collectors and Extraction Systems Dust collection and extraction systems supplied from Hennlich Engineering for grinding mills, steel production, grain silos, CNC machining, and general industrial applications, featuring JET-PULS proprietary recovery system.
• Fabrication Services In-house manufacturing of silos, vessels, conveying systems, steelwork, support structures, and specialist components in stainless steel, mild steel, and aluminium. Factory facilities include 600m² space on a 1-acre site with two workshops, 9.5T overhead cranes, 3m brake press, rolls up to 2m, and 1250mm bed lathe.
• Project Management Services Complete project management from concept through commissioning, including mechanical and electrical engineering, PLC control, SCADA systems, and plant integration for bulk materials handling installations.
• Service and Maintenance Engineering maintenance, breakdowns, repairs, plant upgrades, and supply of spare parts for existing bulk materials handling systems, including on-site pipeline and silo maintenance and maintenance contracts.
• Materials Testing Services In-house test facilities for pneumatic conveying trials covering Dense Phase, Pulse Phase, Dilute Phase, and Vacuum systems to optimise system design for each customer's specific application before deployment.
• Weld Overlay Cladding Corrosion resistant weld overlay cladding for pipes, valves, flanges, connectors, and elbows. Includes pipe cladding, valve cladding, flange cladding, and specialist fabrication. Can reduce costs by up to 60% compared to solid alloy production.
• Bag Machines Bag filling machines from Arcomet7 including pneumatic bag machines, vertical bag machines, double bag machines, and open top bag filling stations for powders, granules, and cement products. STB serves as the contact point for Arcomet7 products in the UK market.

Quantifiable outcome

• Dense Phase conveying achieves product/air ratios up to 150:1 with conveying rates up to 10 tonne/hr
• +4 more outcomes

Named customers19 records

Segments4 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature7 records

Partnerships

One partnership is on record.

• Arcomet7minorChannel Partner/ Reseller/ DistributorSTB Engineering partners with Arcomet7 for bag machines including pneumatic bag machines, vertical bag machines, and open top bag filling stations. STB serves as the contact point for Arcomet7 products in the UK market.

Scale indicators6 records

Recent moves7 records

Expansion highlights5 records

Direct peers

• Gericke: Gericke is a Swiss-headquartered specialist in pneumatic conveying, sieving, mixing, and bulk material handling for food, chemicals, pharma, and minerals. Its product regime and customer verticals align closely with STB's five-regime conveying offering, particularly in Europe where it underbids UK SME-packaged solutions.
• Spiroflow: Spiroflow is a UK- and US-headquartered manufacturer of pneumatic conveying systems, bulk bag (FIBC) discharging/filling stations, and bulk solids handling equipment serving food, chemical, plastics, and mineral customers. It is the closest geographic and product-line analogue to STB Engineering, competing directly in the same UK SME-channel for conveying and silo projects.
• Dynamic Air: Dynamic Air is a US-based manufacturer of pneumatic conveying systems, dust collectors, and bulk storage equipment for industrial minerals, chemicals, plastics, and food. Its dense- and dilute-phase conveying product portfolio maps cleanly to STB's core regimes, and both compete for similar low-velocity, low-degradation conveying specifications.
• Coperion: Coperion (a Hillenbrand company) is the global market leader in bulk material handling, pneumatic conveying, and compounding systems for plastics, chemicals, food, and pharma. It competes head-to-head with STB on Dense Phase and Dilute Phase conveying for polymer/PVC plants and on bulk bag handling, but at considerably larger scale and multinational footprint.
• Flexicon: Flexicon (US- and UK-based) designs and manufactures pneumatic conveying systems, bulk bag dischargers/loaders, and flexible screw conveyors for food, pharma, plastics, and chemicals. Its FIBC/big bag handling and conveying regime portfolio overlaps directly with several of STB's product lines, particularly the Bulk Bag & Sack Handling range.
• Motan: Motan specializes in materials handling, conveying, drying, and dosing systems primarily for the plastics and polymer processing industry. STB's leadership in UK PVC mixing plants places it in direct competition with Motan for polymer industry conveying and recipe-controlled dosing work, particularly where companies operate multi-region production sites.
• AZO Materials Handling: AZO is a German-based specialist in pneumatic conveying, screening, and bulk materials handling for food, plastics, chemicals, and pharma. AZO's product scope and vertical mix closely mirror STB's, and the firm maintains an explicit UK presence, putting it in direct competition for the same enterprise custom-projects pipeline.
• Volkmann: Volkmann is a German specialist in vacuum and Dense Phase pneumatic conveying for pharmaceutical, food, and chemical powders. Its dense-phase product range directly overlaps STB's pioneering Dense Phase capability, especially in pharma containment and high-care applications where both compete for FDA/GMP-compliant vacuum systems.

Broad incumbents

• Zeppelin Systems: Zeppelin Systems (part of Zeppelin Group) provides large-scale bulk material handling, storage, and pneumatic conveying solutions, primarily serving polyolefin, chemical, and petrochemical plant builders. Compared with STB it operates at greater scale and full plant-engineering scope, but its polymer/grains silos and conveying directly overlap STB's flagship polymer and minerals verticals.
• Bühler Group: Bühler is a Swiss-based, global broad-line equipment and process solutions provider for food, feed, and advanced materials, including bulk handling, conveying, and storage for grain, flour, chocolate, and chemical powders. Its food-processing bulk handling stack competes for the same food/dairy and chemicals segment STB serves, although at substantially larger scale and broader portfolio.

Market position

Strengths5 records

Weaknesses6 records

Competitive moat5 records

Key risks7 records

Key highlights7 records

Customer concentration

• Xx.com/STBEngineering
• LinkedInlinkedin.com/company/stbengineering

Compliance7 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 →

Frequently asked questions about STB Engineering