Company Founded

October 14, 1965

Founded and started by Hans Unger, John Radhal, Frank Hansen and partially funded by Stern Brothers Investment Bankers, Gene “Alex” Alexander and Evelyn Stout.

August 17, 1966

Started rupture disc production at 72nd and Central, Kansas City, Missouri. First job shipped in September 1966. Basic product line of Standard, Composite, ORK Rupture Discs.

August 17, 1967

A formal quality program established, first edition of the CDC Quality Manual.

August 17, 1967

CDC was purchased from the founding partners by Charles D. Close, Philadelphia, Pennsylvania.


August 17, 1969

Introduced patented non-fragmenting design Composite Rupture Discs. CDC is becoming an established company developing national and international sales representatives and ongoing product development activities. Now have 18 associates.

Zap Tanksert “Specials”

August 17, 1970

Patented first reverse-buckling disc with replaceable knife blades. Patented tank rail car rupture disc. Initial development of welded disc designs for defense/aerospace industries. Growth required relocating to larger facility. Leased 15,000 sq. ft. section of new 50,000 sq. ft. building in Riverside, Missouri. Now have 45 associates at CDC.


August 17, 1975

Expanded the Riverside facility to 25,000 sq. ft. to accommodate growth. ZAP Reverse-Acting Rupture Disc design receives the John C. Valor Award for innovative new product for the chemical industry.

August 17, 1976

First rupture disc manufacturer to design and build an in-house flow-testing laboratory to measure flow capacity through rupture discs, relief valves and valve disc combinations.


August 17, 1977

Introduction of the first ultra-low pressure positive and vacuum relieving discs.

August 17, 1981

Acquired previously named Bell and Howell or Paul Valve Company; renamed CDC Valve Company.


August 17, 1982

Introduction of the first monitoring device to indicate a burst rupture disc.

PC Sert

August 17, 1983

New PC Sert Rupture Disc developed for lntermodal tanks. Established CDC PE as our European headquarters in the Netherlands.


August 17, 1984

Introduced a cartridge-type rupture disc holder assembly to accommodate a preassembled spare rupture disc in a processing line.

ULTRX and 3-D flow direction disc tag

August 17, 1985

ASME/National Board Flow Test facility certification; the first and only in our industry. Introduced CDC’s state-of-the-art ULTRX Scored Reverse-Acting Rupture Disc design.

August 17, 1986

Received the Missouri Governor’s Award for Product Innovation for the ULTRX Rupture Disc design. A second John C. Valor Award received for the ULTRX as innovative new product for the chemical industry.


August 17, 1987

Scored Tension Disc and FS Composite. Acquired assets of Crosby Rupture Disc Division, May, 1987.

August 17, 1988

Established COH-Disc, a joint venture with Ohtory KK in Japan. Continental Disc Corporation is acquired by Siegel-Robert, Inc., St. Louis, MO.


August 17, 1989

Introduction of a low-pressure scored reverse-acting rupture disc design. Air Products and Chemicals Suppliers Quality Award.

August 17, 1991

Acquisition of LaMOT Corporation, Rupture Disc Co., Corpus Christi, Texas.


August 17, 1992

Achieved ISO 9001 Quality System Registration, the first by a U.S. rupture disc manufacturer and the first in the greater Kansas City area. Design and site selection for new corporate headquarters/mfg. facility, Liberty, Missouri.


August 17, 1993

Introduction of the SANITRX Rupture Disc design in pharmaceutical industry. Expansion in Europe with addition of direct sales offices, CD UK Ltd, in England and CDC Deutschland in Germany. Evacuated Riverside facility due to Missouri River flood. July 17, 1993. Rupture Disc Division temporarily located in Olathe, Kansas, back in production within two weeks of leaving Riverside. CDC Valve Company temporarily located in Grandview, Missouri.

August 17, 1994

Moved to new corporate headquarters in Liberty, Missouri. 96,000 sq.ft. April, 1994.


August 17, 1994

SANITRX disc design received the “Innovation in Pharmaceutical Processing” Award.

Icon/Star X

August 17, 1994

Introduced the ICON and STAR-X Rupture Disc designs.

Enviro Guard

August 17, 1995

Introduced a protective, weatherproof cover for outdoor disc installations.

Duca Clamp

August 17, 1995

Introduced a multi-bolt clamp for the assembly of rupture disc devices.

Vent Panels

August 16, 1996

The vent panel product line was introduced to minimize the structural damage of dust, vapor or mist deflagration in silos and other material-handling environments.


August 17, 1996

Introduction of the Reverse Cross-Scored Rupture Disc design.

August 17, 1997

Acquired the assets of the Anderson Greenwood Rupture Disc Div.

August 17, 1998

ASME and National Board Certification of the product line; a first in our industry.

August 17, 1999

First domestic rupture disc manufacturer to receive a China Safety Quality License. Acquired Groth Corp, Houston, Texas. Received quality and product design-type approvals in compliance with the European Pressure Equipment Directive.

August 17, 2000

Inauguration of ERP System to enhance CDC’s information technology.


August 17, 2001

Introduction of a low-pressure scored reverse-acting rupture disc design.

August 17, 2002

Built new manufacturing facilities for LaMOT/Groth in Stafford, Texas.

Sanitrx LP

August 17, 2003

Created low-pressure design SANITRX Rupture Disc. Received Product/Quality Certification for the European Directive ATEX for discs used in potentially explosive atmospheres.

August 17, 2004

Began Lean Enterprise initiative as a continuous improvement process in all aspects of CDC operations. Certified as being the only rupture disc manufacturer to achieve welding certification in accordance with requirements of Nadcap and the aerospace/defense industry. Certified by the aerospace industry as being the only rupture disc manufacturer meeting the quality requirements of standard SAE-AS 9100.

August 17, 2005

CDC celebrates 40 years of innovation, growth and quality. Now have more than 250 associates globally and growing.

August 17, 2007

Continental Disc Corporation is pleased to announce the appointment of Mr. David W. Brown to the position of CDC President.

August 17, 2008

Relocated and integrated the manufacture of LaMOT Rupture Discs into the Liberty home office to improve efficiency.

July 1, 2010

Opened manufacturing operations in Ahmedabad, India, to support growth of business in the Middle East and Asia markets.

August 17, 2010

Advanced the product selling process globally through automation using the Big Machines Software System for quoting and order-entry activities.

Sanitrx HPX

August 17, 2010

Released the SANITRX HPX product to improve long-term reliability of reverse-acting discs in sanitary service markets such as pharmaceuticals and food & beverage.

HPX Product Family

August 17, 2011

Released the HPX Product Family to provide the most versatile and comprehensive rupture disc technology available in the industry.

Sanitrx LPX

August 17, 2011

Release to sales of SANITRX LPX Rupture Disc for very low-pressure applications.

August 17, 2011

Enlarged computer-enhanced machine-shop capabilities to support the rapid growth in oilfield development and other OEM markets.

August 17, 2012

Implemented a focused training program to institutionalize and improve our internal and external training efforts.

August 17, 2013

Added tantalum corrosion-resistant material as an option in the HPX Product Family. Introduced SRA (Scored Reverse-Acting) discs in smaller sizes to support the need for higher technology in markets such as oil and gas, R & D laboratories and industrial gas manufacturing.


August 17, 2014

Released the BDI-FLX to enhance functionality, reliability and global certification of alarm systems used with safety relief systems. Achieved ASME certification and standardized the design of Welded Muffled Plugs in our small threaded assembly product line.

August 17, 2015

Standardized a variety of thread types on small assemblies to support global design standards as standard products instead of specials. Tested and certified HPX Rupture Discs in line with safety valves to facilitate chemical and refining plants meeting very stringent EPA guidelines.

November 14, 2016

Continental Disc Corporation is pleased to announce the appointment of Mr. Ben Cox to the position of CDC President.

April 1, 2017

LaMOT Valve & Arrestor created in Stafford, Texas to serve the upstream market and some midstream market applications, providing safety solutions by offering tight sealing vapor safety equipment to protect onsite personnel, equipment and to minimize evaporation of product loss to atmosphere with a goal to exceed customer expectations with our safety equipment product offering including Pressure Vacuum Relief Valves, Emergency Pressure Relief Vents, Gauge Hatches, Inline Vent Valves, Stack Valves, Arrestor Products and Blanket Gas Regulators while providing exceptional customer service.

July 14, 2021

Tinicum Incorporated acquires controlling interest in Advantek, LLC, Continental Disc Corporation, LLC, and Dexter Magnetic Technologies, Inc.

July 26, 2021

Continental Disc Corporation is pleased to announce the appointment of Mr. Mike M. Waters to the position of Chief Executive Officer.

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