What Diamond Gear does

Diamond Gear is a Houston, Texas-based manufacturer of heavy-duty industrial gearboxes used to actuate quarter-turn and multi-turn valves in process-industry applications. The company produces three core product lines — worm gears (for quarter-turn manual and motor-operated valves), bevel gears (for multi-turn gate and globe valves, in both motorized BG-Series and manual B-Series configurations), and declutch override gears (sandwich-style manual override units that fit between pneumatic actuators and valves for emergency operation). Products are constructed from high-strength ductile iron and stainless steel, with torque ranges from approximately 216 ft.-lb. to 341,666 ft.-lb., thrust up to 438,000 lbs., and worm gear operating temperatures from -40°F to +400°F. Diamond Gear operates a built-from-stock-blanks model, maintaining a large U.S. inventory of gear blanks that are precision-machined and customized at its Houston facility, supporting rapid lead times relative to named competitors Road Torque and Sambo. A proprietary splined stem bushing design enables quick and economical customization of stem holes.

Name

Diamond Gear

Legal name

LPW Group, Inc.

Website

https://diamond-gear.com

Company type

Private

Founded year

1999

Operating status

Operating

Headcount range

1–10 employees

Ownership category

akta.pro rank

Product category

Industrial Valve Gearboxes

NAICS

Speed Changer, Industrial High-Speed Drive, and Gear Manufacturing (333612)

SIC

General Industrial Machinery & Equipment, Nec (3569), Special Industry Machinery, Nec (3559)

akta.pro primary industry

Gearmotors, Gearboxes & Speed Reducers (IMAGACAF)

Keywords

• Industrial gearboxes
• Valve actuators
• Worm gears
• Bevel gears
• Declutch overrides

Headquarters

HQ city

Houston

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Operations, Infrastructure, Personnel, Marketing or Sales

Revenue model

1. Industrial Gearbox Sales: Primary revenue stream from manufacturing and selling heavy-duty worm, bevel, and declutch override gearboxes for valve actuation applications. Products are sold to valve manufacturers, distributors, and service companies across industrial sectors including petrochemical, LNG, power, mining, and marine.
2. Customization and Machining Services: In-house machining and customization services for gearboxes including stem bushing machining, drilling and tapping bolt patterns, custom paint options, and linkage kits. These services add value and differentiation to the core product sales.

Pricing tiers

Go-to-market motion2 records

Distribution channels2 records

Marketing channels4 records

Core offering

Diamond Gear manufactures heavy-duty industrial gearboxes for valve actuation, including quarter-turn worm gears, multi-turn bevel gears, and declutchable manual override gears. Products are precision-machined from in-stock gear blanks at the Houston, TX facility and customized to specific valve applications. The company sells primarily to valve manufacturers, distributors, and service companies in petrochemical, LNG, power, mining, marine, and defense industries.

Product overview

Diamond Gear is a manufacturer of heavy-duty industrial gearboxes for valve actuation, offering three core product lines: Worm Gears (quarter-turn for manual and motorized operation), Bevel Gears (multi-turn for gate and globe valves in both motorized and manual variants), and Declutch Gears (manual override for pneumatic actuators). The company operates on a built-from-stock-blanks model, maintaining a large U.S. inventory of gear blanks that are precision-machined and customized at their Houston, TX facility. Customization services include stem machining, bolt pattern modifications, and custom paint finishes. All products are designed for industrial applications in petrochemical, LNG, power, mining, marine, and defense industries.

Differentiator

Problem solved

Functional benefit

Products and services

• Worm Gears Heavy-duty quarter-turn worm gearboxes for manual operation and Motor Operated Valve (MOV) applications, including cast-iron and stainless steel variants. Features splined stem bushing design, O-ring and gasket sealing, and optional motor flange adapters. Torque range: 233–341,666 ft.-lb. (standard) and 6,000–28,000 in.-lbs. (stainless steel); temperature range: -40 to +400°F. Designed for valve manufacturers, distributors, and service companies in petrochemical, power, marine, and other industrial sectors.
• Bevel Gears Multi-turn bevel gearboxes for gate and globe valve applications, offered in motorized BG-Series and manual B-Series variants. Motorized BG-Series feature bronze stem nut, high-strength ductile iron construction, heavy-duty ISO motor flanges, and weatherproof design with torque range 500–19,000 ft.-lb. and thrust range 28,000–438,000 lbs. Manual B-Series feature high-strength cast iron construction with torque-only lug driver and torque range 1,000–4,000 ft.-lb. Designed for industrial valve manufacturers and service companies.
• Declutch Gears (Declutchable Manual Override) Sandwich-style declutchable worm gears designed to fit between actuator and valve, providing manual override capabilities for critical applications when air supply to pneumatic actuators is interrupted. Features lockable engage/disengage lever mounted to a cam for positive engagement. Torque range: 216–28,166 ft.-lb. Built for valve manufacturers, distributors, and service companies serving petrochemical, LNG, power, marine, and defense sectors.
• Customization and Machining Services In-house customization and machining services for Diamond Gear gearboxes, including stem bushing machining, drilling and tapping bolt patterns, custom paint options, and linkage kits. Performed at the Houston, TX facility with rapid turnaround times, available to valve manufacturers, distributors, and service companies requiring non-standard mounting or stem configurations.

Quantifiable outcome

• Torque range: 233–341,666 ft.-lb. for worm gears; 500–19,000 ft.-lb. for motorized bevel gears; 1,000–4,000 ft.-lb. for manual bevel gears; 216–28,166 ft.-lb. for declutch gears
• +3 more outcomes

Named customers3 records

Segments7 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Six partnerships are on record, tiered core and minor.

• Ladish ValvescoreStrategic or Co-development PartnerPart of the LPW Group family of brands. Ladish Valves designs and manufactures engineered gate, globe, check, and ball valves focusing on stainless, duplex, and high nickel alloys for demanding corrosive, erosive, and high-purity applications. Diamond Gear products complement valve offerings with gear operators for valve actuation.
• Smith ValvescoreStrategic or Co-development PartnerOne of the world's longest-standing providers of API 602 forged steel valves. Sister company within LPW Group offering complementary valve products to Diamond Gear gearboxes.
• Penn MachineminorStrategic or Co-development PartnerLeader in the forged pressure fitting industry, founded in 1931. LPW Group sister company providing complementary industrial products.
• Western Forge & Flange Co.minorStrategic or Co-development PartnerLeading supplier of world-class forged flanges in exotic alloys including Hastelloy, Inconel, Titanium, Duplex and Super-Duplex, Stainless Steel, and Copper Nickel flanges, founded in 1944. LPW Group sister company.
• Advanced Industrial Technologies (AIT)minorStrategic or Co-development PartnerExclusive North American distributor for Air Torque rack and pinion and Scotch yoke actuators. Provides complementary actuator products for valve automation systems.
• US Drop ForgeminorStrategic or Co-development PartnerLeader in custom impression die forging, creating dies in carbon, stainless, chrome moly, aluminum, copper nickel, hastelloy, monel, and other alloys. LPW Group sister company.

Scale indicators3 records

Recent moves4 records

Expansion highlights3 records

Broad incumbents

• Crane Co. Crane's ChemPharma & Energy and Flow Solutions segments supply process valves and integrated actuation packages to chemical, petrochemical, and power customers—directly competing with Diamond Gear's valve actuation offerings.
• Emerson (Fisher): Emerson's Fisher Controls division supplies control valves and integrated valve automation solutions including gear operators for the process industries. It competes with Diamond Gear in petrochemical, LNG, and refining applications.
• Flowserve (Limitorque): Flowserve's Limitorque brand supplies electric valve actuators with manual override gear operators for oil & gas, power, and chemical customers. It competes head-to-head with Diamond Gear in valve actuation across all of Diamond Gear's primary verticals.
• Auma: Auma is a major global manufacturer of electric valve actuators including gear-operated variants. It serves the same petrochemical, power, and water/wastewater customers as Diamond Gear with a broader integrated actuator portfolio.
• Rotork: Rotork is the global leader in valve actuators and gear operators, offering electric, pneumatic, and hydraulic actuator packages that include manual override gearboxes—directly overlapping Diamond Gear's core product category at much larger scale.

Direct peers

• Biffi: Biffi (now part of CIRCOR) is a specialist in valve gear operators and actuators for oil & gas and power applications. Its manual gearboxes, declutch overrides, and bevel gear operators compete directly with Diamond Gear's product lines.
• Air Torque (AIT distribution): Air Torque is a European manufacturer of rack-and-pinion and Scotch yoke pneumatic actuators; AIT (an LPW Group sister company of Diamond Gear) is Air Torque's exclusive North American distributor. It is both a complementary supplier and an indirect competitive peer in valve actuation.
• Koso America: Koso is a Japanese manufacturer of valve actuators and gear operators with U.S. distribution. Its product range of pneumatic, electric, and manual valve gear operators competes with Diamond Gear across petrochemical and power generation applications.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/diamond-gear1

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 Diamond Gear