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 ISO 14001:2015


ISO 9001:2008

ISO 9001:2008




           ABS Cert. Nov., 2014
 Newsletter for Summer, 2016

Newsletter for 
Summer, 2016

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 2015 Keflex Catalog



Keflex Line Card 2014 Web Version

Keflex Line Card

Application Guide

Application Guide

WWTP Brochure

Quadra-Side High Pressure Expansion Compensators 7Q Series

Quadra-Side® High Pressure Expansion Compensators 7 Q SeriesFor the Control of Pipe Expansion & Contraction in Water & Steam Systems

The heavy-duty Keflex™ 7Q Expansion Compensators are specifically designed for high pressure service, available in sizes ¾" to 4", in both single and dual units. The single type is capable of absorbing 2" total movement, 1 ½" in compression and ½" in extension from the factory predetermined setting. The dual type is capable of absorbing 4" total movement, 3" in compression and 1" in extension from the factory pre-determined setting.

The heart of the Keflex™ 7Q Expansion Compensator is the multi-ply type 316L corrosion-resistant stainless steel bellows. These bellows are internally pressurized and operate primarily in compression where they have the greatest hoop strength capability.

The Quadra-Side® square telescoping shrouds encompass the bellows to provide protection against torsion, squirm, misalignment and external damage, as well as preventing over-compression of the bellows. Additionally, the unique design provides visual evidence that the traverse of the unit has not been exceeded. The integral guiding feature of the Quadra-Side® prevents offset to assure the pipe movement is directed axially into the bellows, a requirement for optimum performance.

The square telescopic shroud does not serve as a chamber to contain liquid or gas as do the covers on some other high pressure "compensators". Therefore, the outside diameter of the Quadra-Side® type compensator is considerably smaller, permitting it to be installed in walls, under floors or behind radiator covers without expensive modifications at the point of installation.

Product Literature


   Technical Data

    Installation Instructions


Single Bellows Quadra-Side Compensators

    Female NPT End Fittings Model 7Q
    150# Flange End Fittings Model 7QFL
    Male NPT End Fittings Model 7QMPT
    Female Copper Tube End Fittings Model 7QT
    Grooved End Fittings Model 7QVG
    Weld Ends Model 7QWT


Dual Bellows Quadra-Side Compensators

    Female NPT End Fittings Model 7QD
    150# Flange End Fittings Model 7QFLD
    Male NPT End Fittings Model 7QMPTD
    Female Copper Tube End Fittings Model 7QTD
    Grooved End Fittings Model 7QVGD
    Weld Ends Model 7QWTD