GNB Corporation

What GNB Corporation does

GNB Corporation is a US-based, Elk Grove California-headquartered manufacturer of vacuum hardware founded in 1968 by Gary N. Burnett, operating since August 2016 as a subsidiary of Taiwan's KL Group while retaining its California corporate status. The company designs and fabricates vacuum chambers, gate valves (up to 72 inches), angle valves, ball valves, slit valves, ConFlat/KF/ISO/ASA flanges, cryogenic products, and ASME U-stamp certified pressure vessels for semiconductor fabrication, flat panel display manufacturing, aerospace and space simulation, scientific research laboratories, industrial processing, and medical equipment customers. Its proprietary designs seal bidirectionally against full atmospheric pressure differential without requiring vacuum lubricants, greases, or sealants, with leak rates certified below 1×10⁻⁹ std cc/sec He and ultra-high vacuum testing capability to <1×10⁻¹¹ Torr via in-house Helium Mass Spectrometer and Residual Gas Analysis equipment.

The business operates a hybrid revenue model combining custom-engineered and catalog hardware sales (gate valves, chambers, flanges, cryo-coils), spare parts supply and product servicing, and rebuild services for any manufacturer's elastomer-sealed valve with a four-week turnaround on large-format units. GNB goes to market through US regional field sales managers and inside sales (Dustin Higginbotham), a network of international distributors covering Europe, China, Taiwan, Korea, Japan, India, Malaysia, and Russia/Ukraine, plus a small e-commerce storefront at shopvacuumchamber.com, and generates leads via participation in Intl AVS, Semicon West, RMAVS, and SLAC Lab User Meeting trade events. The company employs nearly 100 people as of 2023, up from 19 in 2001, and holds ISO 9000, ASME U-stamp, and Baldridge Award credentials under its quality program.

Name

GNB Corporation

Legal name

GNB Corporation

Website

https://vacuumchamber.com

Company type

Private

Founded year

1968

Operating status

Operating

Headcount range

1,001–5,000 employees

Short description

GNB Corporation is a US-based, Elk Grove California manufacturer of vacuum hardware — chambers, gate valves up to 72 inches, flanges, cryogenic components, and ASME-certified pressure vessels — serving semiconductor, aerospace, scientific research, and industrial customers worldwide since 1968. It operates as a subsidiary of Taiwan's KL Group.

Ownership category

akta.pro rank

Product category

Vacuum Hardware Manufacturing

NAICS

Industrial Valve Manufacturing (332911)

SIC

Special Industry Machinery, Nec (3559)

akta.pro primary industry

Vacuum Systems & Components (Vacuum Pumps, Ejectors, Cups, Grippers) (IMAHAGAN)

akta.pro secondary industry

Vacuum Pumps & Systems (IMAHANAD)

Keywords

• Vacuum chamber manufacturing
• Vacuum gate valves
• Ultra-high vacuum hardware
• Cryogenic vacuum products
• Custom vacuum engineering

Headquarters

HQ city

Elk Grove

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Vacuum hardware product sales: GNB generates revenue primarily from the manufacture and sale of vacuum hardware products including vacuum chambers, vacuum valves (gate, angle, ball, slit), flanges & fittings, cryo-products, accessories, tubing, and high purity components. Products are sold as both standard catalog items and custom-engineered solutions.
2. Spare parts and product servicing: GNB offers spare parts for vacuum products along with product servicing capabilities. Revenue generated from supplying replacement components and repair/maintenance services for existing customer installations.
3. Rebuild services: GNB rebuilds any manufacturer's elastomer sealed valve. Valves are completely disassembled, blasted and cleaned, worn parts replaced, and undergoes rigorous testing and Helium Mass Spectrometer leak testing before return. Example: 72-inch valve rebuilt and delivered in four weeks.

Go-to-market motion2 records

Distribution channels4 records

Marketing channels5 records

Core offering

GNB Corporation is a US manufacturer of vacuum hardware, producing custom and standard vacuum chambers, vacuum valves (gate, angle, ball, slit), flanges and fittings, cryogenic products, high-purity tubing, and ASME U-stamp pressure vessels. The company's products are engineered to operate reliably in high and ultra-high vacuum environments without the use of vacuum lubricants, greases, or sealants, serving semiconductor fabrication, aerospace and space simulation, scientific research, medical, and industrial processing customers.

Product overview

GNB Corporation is a premier manufacturer of vacuum hardware and components, offering a comprehensive portfolio of vacuum valves, chambers, and accessories. The core product lines include gate valves, angle valves, ball valves, and slit valves as the primary valve offerings, complemented by customizable vacuum chambers available in aluminum, mild steel, stainless steel, and ultra-high vacuum configurations. Supporting products include ConFlat, KF, ISO, and ASA flanges and fittings, cryogenic products (multi-coolant baffles, cryo-coils, liquid nitrogen traps), high purity tubing and fittings, accessories (feedthroughs, viewports, traps), and ASME-certified pressure vessels. The company specializes in large-sized valves and custom-engineered solutions, with manufacturing capabilities ranging from R&D phase to high production volumes. GNB serves semiconductor, aerospace, scientific research, medical, energy, and metallurgical industries with products that work reliably without vacuum lubricants, greases, or sealants.

Differentiator

Problem solved

Functional benefit

Products and services

• Vacuum Gate Valves High vacuum gate valves fabricated from stainless steel or mild steel and available with pneumatic, electric, hydraulic, or manual actuation. Standard sizes built up to 72 inches (~2m) with linear actuation and 35 inches (90cm) with cross actuation. All GNB gate valves seal both ways against full atmosphere pressure differential without requiring vacuum lubricants, greases, or sealants. Available with ASA, ISO, ConFlat, or custom flange types and optional Protective Metal Guard enclosures.
• Vacuum Angle Valves Precision vacuum angle valves designed for vacuum systems across multiple industries. Engineered for leak rate less than 1×10⁻⁹ std cc/sec He at vacuum rating 1×10⁻⁷ Torr, with 304/304L stainless steel or mild steel construction and electro-pneumatic actuators. Maximum operating temperature of 400°F with 24V DC solenoid standard.
• Vacuum Ball Valves Vacuum ball valves providing simple open/close operation with reliable sealing for vacuum applications across the company's industrial, semiconductor, and research customer base.
• Vacuum Slit Valves Precision slit valves for semiconductor, display, and photovoltaic manufacturing applications requiring vacuum isolation and contamination control between process chambers.
• Vacuum Chambers Custom and standard vacuum chambers providing controlled vacuum environments for degassing, environmental testing, semiconductor processing, vacuum heat treatment, leak testing, crystal growing, and vacuum coating systems. Available in aluminum, mild steel, stainless steel, and UHV configurations, with capabilities spanning large-format chambers for aerospace and scientific applications to compact chambers for industrial processes.
• ASME U-Stamp Pressure Vessels ASME U-stamp certified pressure vessels manufactured to ASME safety and quality standards for pressure applications in regulated industrial and process environments.
• Cryogenic Vacuum Products Cryogenic vacuum products including multi-coolant baffles (5-bounce design), cryo-baffles, water-cooled baffles, contamination traps, cryo-coils (Meissner coils), and liquid nitrogen traps. Designed to trap contaminants such as diffusion pump oil, reduce oil backstreaming by 94%, and reduce pump-down time by 25-75% by freezing water vapor that comprises 65-95% of the gas load in most vacuum systems.
• Vacuum Flanges and Fittings Vacuum flange and fitting components including ConFlat (CF) ultra-high vacuum flanges, KF high vacuum quick-release flanges, ISO flanges, and ASA flanges, along with gaskets, feedthroughs, nipples, crosses, centering rings, copper gaskets, bellows, metal hoses, and viewports. ConFlat is GNB's registered trademark covering CF 1.33" to CF 16.5" ultra-high vacuum flanges with 304/L stainless steel and OFHC copper or silver-plated gaskets rated -190°C to +450°C.
• Vacuum Tubing Vacuum tubing meeting BPE, sanitary, and ASME requirements for use in high-purity and corrosive atmospheres, various temperatures, and multiple chemicals. Compatible with vacuum condensers, pumps, traps, and pressure pumps in pharmaceutical, food and beverage, and industrial processing applications.
• High Purity Vacuum Components High purity pumps, tubing, fittings, and adapters designed for harsh environments while providing accurate and reliable results. Includes JIS G3459 pipe, ASTM A269/A632 tube, elbows, caps, reducers, tees, flanges, and coaxial fittings for semiconductor and pharmaceutical-grade applications.
• Valve Rebuild Services GNB rebuilds any manufacturer's elastomer-sealed valve. Valves are completely disassembled, blasted and cleaned, worn parts replaced, and tested using Helium Mass Spectrometer leak detection before return. Example delivery: a 72-inch valve rebuilt and returned to the customer within four weeks.
• Spare Parts and Product Servicing Spare parts supply and product servicing for GNB vacuum hardware, providing replacement components and repair or maintenance support for existing customer installations. Handled by the Inside Sales Engineer team via [email protected] and (916) 395-3003 ext. 7200.

Quantifiable outcome

• Cryo-coils reduce pump-down time by 25% to 75%, eliminating the need for expensive vacuum pumps in many applications
• +4 more outcomes

Segments6 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Partnerships

13 partnerships are on record, tiered core and minor.

• VRC Technologies, Inc.coreStrategic or Co-development Partner · 1 September 2025GNB Corporation and VRC Technologies, Inc. entered a strategic manufacturing agreement in September 2025 allowing GNB to produce and commercialize VRC's proprietary aluminum vacuum valve designs across all markets. The partnership combines GNB's large-scale manufacturing capabilities with VRC's engineering-driven valve designs to meet increasing demand across semiconductor, industrial, and research applications. VRC retains the ability to continue production of its own valve designs independently at its Pittsburgh facility.
• KL Group (KL-Korea)coreOthers · 1 August 2016GNB Corporation became a subsidiary of the KL Group (also known as KL-Korea) in August 2016. The acquisition expanded GNB's capabilities and positioned it as a versatile supplier of vacuum hardware components. GNB remains a California corporation and has retained all existing personnel and competencies. GNB serves as the US manufacturer and distributor of Advantorr products including flanges, fittings, viewports, gate valves, angle valves, and semiconductor wafer transfer valves.
• Veonis Technologies GmbHcoreChannel Partner/ Reseller/ DistributorVeonis Technologies GmbH (Lilienthalstrasse 3, D-82178 Puchheim/Munich, Germany) serves as GNB's exclusive sales representative for Germany, Switzerland, Luxemburg, Austria, and Liechtenstein. Contact: Ulrich Spannring. Veonis also handles France, Spain, and Italy through Samy Skalli based in Grenoble, France.
• Druschke Vakuum ServicecoreChannel Partner/ Reseller/ DistributorDruschke Vakuum Service (Am Bruchweg 2, DE-63571 Gelnharsen, Germany) operates as GNB's Service Center Europe, providing service, support, and potentially spare parts distribution for GNB products in the European market.
• King Lai China / Beijing Leyfond Vacuum Tech. Co. Ltd / Peiking Liyatai Technical Development Co. LtdcoreChannel Partner/ Reseller/ DistributorMultiple distributors represent GNB in China: King Lai China (Anna Yan, Vacuum Semi Division), Beijing Leyfond Vacuum Tech Co. Ltd (Jason Wang, A807 Advanced Material Building, Yongfeng, Haidian District, Beijing), Peiking Liyatai Technical Development Co. Ltd (Zongxue Gao, Room B8276 No 32 Fengbei Road, Fengtai District, Beijing), and Kingstone Consultant (Lan Zhang, Shanghai).
• King Lai Taiwan / Junsun Tech Co., LtdcoreChannel Partner/ Reseller/ DistributorKing Lai Taiwan (No.7, 9th East Street, Youth Industrial Zone, Tachia District, Taichung City, Taiwan R.O.C.) serves as GNB's distributor in Taiwan. Junsun Tech Co., Ltd (俊尚科技股份有限公司, 7F 659, Chung-Cheng Road, Hsin-Chuang, Taipei County 242, Taiwan R.O.C.) also represents GNB in Taiwan through Marvil Chang (張正坤) in the Sales Department.
• 2NS TechnologycoreChannel Partner/ Reseller/ Distributor2NS Technology (Daeyi/David Jeon) serves as GNB's representative for Korea. Contact: 82-10-9054-6277, [email protected]. Provides sales and support for GNB vacuum products in the Korean market.
• Arios Co., Ltd / MORITANIcoreChannel Partner/ Reseller/ DistributorArios Co., Ltd (Tetsuji Ishii/Sales Div, 2-20 Mushishino 3Chome, Akishima, Tokyo, Japan) and MORITANI (Hiro Yamamoto, [email protected]) represent GNB in Japan, covering sales and distribution of GNB vacuum products in the Japanese market.
• VT Vacuum Tech.minorChannel Partner/ Reseller/ DistributorVT Vacuum Tech. (Nishanth G, Managing Director, #36 A, AGS Layout, MSR Nagar, Bangalore 560 054 India) represents GNB in the Indian market as the exclusive or primary distributor.
• CryosystemsminorChannel Partner/ Reseller/ DistributorCryosystems (115088, Moscow, ul. Ugreshskaya, 2, page 22) represents GNB in Russia and Ukraine markets, providing sales and technical support for GNB vacuum products in these regions.
• Micron Precision TechnologiesminorChannel Partner/ Reseller/ DistributorMicron Precision Technologies (Siva Nadarajo, Malaysia) represents GNB in Malaysia, providing sales and distribution of GNB vacuum products in the Malaysian market.
• NPB Technology Group, Inc.coreChannel Partner/ Reseller/ DistributorNPB Technology Group (Tom Anderson, www.npbtech.com) serves as GNB's authorized sales representative for Southern California, Southern Nevada, Utah, Colorado, Arizona, Hawaii, and New Mexico, and additionally for Washington, Oregon, and Idaho. Covers multiple US Western territories with dedicated regional contacts.
• Power Connection, Inc.coreChannel Partner/ Reseller/ DistributorPower Connection, Inc. (Val C. Robinson, (408) 779-8888) serves as GNB's authorized sales representative for Northern California and Northern Nevada, providing local sales coverage for GNB vacuum products in these territories.

Scale indicators6 records

Recent moves8 records

Expansion highlights5 records

Direct peers

• VAT Group: Swiss-based global leader in vacuum valves used in semiconductor and display manufacturing. Directly comparable to GNB in vacuum isolation valve design, semiconductor customer base, and ultra-high vacuum leak-rate specifications.
• ULVAC: Japanese manufacturer of vacuum equipment, components, and systems for semiconductor, display, and industrial applications. Directly comparable in vacuum chamber and valve manufacturing with similar Asian and global customer reach.
• Huntington Mechanical Laboratories: US-based vacuum hardware manufacturer offering chambers, valves, and fittings for research and semiconductor applications. Comparable in custom vacuum engineering and US research/semiconductor customer overlap.
• Nor-Cal Products: US-based manufacturer of vacuum components, fittings, flanges, and chambers for research and industrial markets. Directly comparable in vacuum hardware manufacturing with overlapping US research and semiconductor customer base.
• MDC Vacuum Products: US-based manufacturer of vacuum components, flanges, fittings, viewports, and custom chambers. Comparable in vacuum component manufacturing for research and industrial customers with similar US geographic footprint.

Broad incumbents

• Pfeiffer Vacuum: German vacuum technology manufacturer offering pumps, components, chambers, and leak detectors. Comparable in vacuum system components and global industrial/scientific customer base; broader scope than GNB's chamber-and-valve focus.
• MKS Instruments: US-based equipment and instrumentation provider with a significant vacuum products division serving semiconductor and industrial customers. Comparable in vacuum hardware and semiconductor end-market exposure but operates at much broader portfolio scale.
• Leybold (Atlas Copco): German vacuum equipment manufacturer (now part of Atlas Copco) offering pumps, valves, and chambers for industrial and research markets. Comparable in vacuum hardware and European industrial/scientific customer overlap.
• Agilent Technologies (Vacuum Products Division): Diversified measurement and vacuum equipment company with vacuum products for semiconductor, research, and industrial applications. Comparable in vacuum component breadth and target customer base but serves many markets beyond vacuum hardware.

Regional players

• Shimadzu (Vacuum / Industrial Equipment): Japanese scientific and industrial equipment manufacturer with vacuum-related product lines serving Asian research and industrial customers. Comparable in vacuum hardware for scientific and industrial applications but with primary geographic focus on Asia.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• YouTubeyoutube.com/user/GNBvalves
• Facebookfacebook.com/GNB-Corporation-92110742921
• LinkedInlinkedin.com/company/gnb-corporation
• Instagraminstagram.com/GNBvalves

Compliance4 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles6 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 GNB Corporation