Retainers feature torque-limiting design.

Press Release Summary:

Designed to prevent damage to board module due to over tightening, Calmark(TM) Series 223 and 224 five-piece Card-Lok retainers suit cold plate-heat exchanger applications. Standard hex wrench can be used to lock board module assembly into cold wall, while wedge action design provides maximum contact between thermal paths on board module assembly and heat-sinking surface for maximum thermal transfer. Retainers are offered in variety of standard lengths, mounting options, and finishes.

Original Press Release:

Calmark Torque-Limiting Card-Lok Retainers Prevent Board Damage

Warwick, RI, May 2009--New Calmark(TM) Series 223 and 224 five-piece Card-Lok retainers for cold plate-heat exchanger applications feature a patent pending torque-limiting design that prevents damage to the card-lok or to the board module assembly caused by over tightening.

A standard hex wrench can be used to lock the board module assembly into the cold wall, providing a safe clamping force without the need for a torque wrench. A screw actuated wedge action locks the board module assembly into place for high reliability and maximum shock and vibration resistance. An alignment spring returns wedge bodies to the relaxed position when unclamped.

The wedge action design also provides maximum contact between thermal paths on the board module assembly and the heat-sinking surface for maximum thermal transfer. Calmark Series 223 and 224 Torque-Limiting Card-Lok retainers are available in a wide range of standard lengths, mounting configuration options and finishes. There are also many custom options available, including three-piece assemblies, non-standard mounting patterns and non-standard finishes.

For information about Calmark Series 223 and 224 Torque-Limiting Card-Lok retainers, visit

Calmark, a Pentair Electronic Packaging company, is the industry leader in the manufacture of ruggedized components that hold boards in place and transfer heat in demanding security and defense applications. Calmark products include Card-Loks, card guides, metal guide retainers, extractors, and Conduction Cooled Assemblies.

READER SERVICE INQUIRIES: Please forward all reader service inquiries to Susan Gangsei, Pentair Electronic Packaging. Email:

Schroff ®, a brand of Pentair Electronic Packaging, provides standard, off-the-shelf and customer specific integrated enclosure solutions and front panels for open architecture bus-based applications, VME, VME64x, VITA31.1 (VXS), VITA 41, CompactPCI, VXI, MicroTCA, AdvancedMC, and AdvancedTCA applications. Complementing the chassis products are a wide range of seismic, EMC, indoor and outdoor plant cabinets, desk and rack mount instrument cases, integrated systems and enclosure hardware. More information is available at and

Pentair Electronic Packaging (, a business unit of Pentair Technical Products, is a world-leading provider of standard and custom electronic enclosure solutions to top manufacturers in many diverse markets, including medical, security/military, datacom and telecom, as well as various other electronic OEMs. The company's extensive product range offers the highest level of quality and aesthetics available in the market today, from complex, progressive-tooled sheet metal components to leading edge, fully integrated AdvancedTCA systems. With ISO 9001-2000 certified manufacturing facilities, Pentair Electronic Packaging uses seamless communications platforms throughout its operations to design, manufacture, assemble, and test products, and manage logistics throughout the supply chain.

Pentair ( is a diversified operating company headquartered in Minnesota. In addition to the Technical Products Group, the company operates the Water Group, a global leader in providing innovative products and systems used worldwide in the movement, treatment, storage, and enjoyment of water. Pentair had 2007 revenues from continuing operations $3.39 billion on a pro forma basis. The company has approximately 14,800 employees worldwide.

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