We appreciate the opportunity to introduce our organization to you!

Our Rupture Disk Group consists of manufacturing plants and marketing centers located in three countries, on the North American and European continents.

Operating continuously since 1952, ZOOK | PROQUIP is the 3rd oldest and experienced Metal Rupture disk manufacturer, we combine to offer 90 years of experience in the field of manufacturing rupture disks.

Through the merger of Process Equipment Ltd., trade named PROQUIP and the acquisitions of Rupture Discs International trade named RDI and Metaullics Inc, product trade named Impervite: ZOOK is positioned in a class of its own, manufacturing the most comprehensive line of metal and graphite rupture disks and related overpressure protection products in the world. ZOOK is capable of manufacturing, in it's own facilities, 100% of the rupture disk requirements of a process plant.

Our resources are dedicated to maintaining the best emergency 'shut-down' delivery service in the industry. This service is designed to allow a facility that is shut down by a rupture disk overpressure event, to start-up within a minimal amount of time.

You have our assurance regarding continuity of the world's highest level of product quality and unparalleled dedication to service while maintaining integrity of pricing.

We invite you to contact us, we are pleased to answer your questions or discuss new opportunities for the application of our high performance, cost saving rupture disks and related products.

ZOOK operates the worlds largest facility dedicated exclusively to the manufacturing of graphite rupture disks. ZOOK's graphite rupture disk origins stem from our founder's pioneering efforts into the development of graphite rupture disks for use as overpressure protection devices on graphite heat exchangers during the 1950's. We are recognized as the world's leader in the development and production of graphite rupture disks. Our graphite facility is located in a suburb of Cleveland, Ohio, USA. This facility was awarded the first issuance of an ASME "UD" stamp for graphite disks. Additionally, this facility is TUV and ISO 9001 certified. Our products may be manufactured in accordance to standards from Factory Mutual (FM) and US Food and Drug (FDA).

In September 1999, ZOOK purchased Process Equipment Limited located in Burlington, Ontario Canada, manufacturers of the PROQUIP trade name of metal rupture disks. PROQUIP began manufacturing metal rupture disks in 1952. PROQUIP is the 3rd oldest and experienced Metal disk manufacturer in number of years in operation.

We manufacture a full line of rupture disk products including conventional forward acting, scored forward acting, conventional reverse acting, scored reverse acting and the revolutionary new Universal Reverse Acting (URA) disk designed for low to high burst pressures suitable for liquid or gas service. This disk design offers true plant-wide standardization previously unavailable with competitive offerings. In addition, PROQUIP manufactures a complete line of explosion vents and doors to service the material handling industries.

In 2000, ZOOK purchased Rupture Discs International (RDI) a graphite rupture disk manufacturer located in Sheffield, England. RDI offers both manufacturing and distribution capabilities convenient to the European markets.

In November 1998, ZOOK strengthened its position in the world's rupture disk markets through the acquisition of the graphite rupture disk business of Metaullics, Inc.