Secure-Grip Flange Spreaders

Bolt Hole Flange Spreaders

Great for Valve Change Outs and Zero-Gap Flanges by gripping from the bolt holes. Flange Faces are never touched.

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Equalizer International - Flange Tool Innovation

The Equalizer™ Secure-Grip Flange Spreader is one of the safest, most innovative flange spreading tools available today.


Equalizer's years of research and development for Vector on the design and development of the Secure-Grip Spreaders to service zero gap (no access gap) flanges has resulted in the most extensive and powerful line of tools to spread any size flange with the highest degree of safety.


Equalizer's Secure Grip Hydraulic Flange Spreader

This unique tool uses Equalizer's patented Expanding Collet Technology to deliver a measurable, controlled force which will separate flanges with little or no access gap, but can also be used on all flange types with access gaps.


Virtually universal, the Secure-Grip Flange Spreader range covers ANSI, DIN, SPO, ASME, API and BS flanges.


As with all flange applications, “best practice” is using at least two tools on a flange to ensure safety as well as flange face integrity.


Looking for a RENTAL alternative? See our solutions for Turnarounds and Major Maintenance Projects here...



How Expanding Collet Technology works


The collets are expanded by conical sleeves, called drive cones, that advance when the drive nut is turned to tighten. 


As the nut is tightened, the collet holder is pulled, causing the drive cone to push under the collet.


The collet slides up the drive cone, spreading the collet sections out and against the inside of the flange’s bolt hole.



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The illustration below shows the Secure-Grip Flange Spreader with the collets in the contracted (closed) position.



The collets are then expanded to grip inside of the bolt holes as shown below.



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The collets expand, gripping more and more as the tool load is increased . . .


Close up of Expanding Collets (one of two)

Close up of Expanding Collets (two of two)


. . . and the flange joint will start to spread apart when the resisting forces are overcome by the increasing tool load.


The Secure-Grip Flange Spreader range is for use on all flange types with bolt holes ranging from 16mm (5/8”) to 100mm (4”).

Click on the info bars below to see more about the three types of Secure-Grip Speaders.


Secure-Grip Mechanical Flange Spreaders

Mechanical operation using a calibrated torque wrench.







Spreading Force

3.7 T (37 kN)


6 T (60 kN)

11 T (110 kN)

Data Sheet

PDF Link
en español

PDF Link

PDF Link


Secure-Grip Hydraulic Flange Spreaders

Hydraulic operation from 13 to 15 tons with external pump





Spreading Force

13 T (130 kN)

15 T (150 kN)

Data Sheet

PDF Link

PDF Link


Secure-Grip InLine Hydraulic Flange Spreaders

Hydraulic In-Line operaton from 18 to 25 tons up to 13 tons external pump





Spreading Force

18 T (180 kN)

25 T (250 kN)

Data Sheet

PDF Link

PDF Link






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EZ Calc - Bolting Calculator, Enerteq's oline tool for estimating Required Torque Values. Use to determine Torque, Bolt Load and Percent Yield of Maximum Load of Bolts.