FAQ - Installation

If too many layers are removed from a module half, put it to the side and take a new module half. The “over peeled” module half can then be used later for a cable or pipe of bigger diameter.

No, a removed layer cannot be put back. A loose layer moves very easily during compression due to the high forces pressing on the cable or pipe.

Yes, but the remaining number of layers in the corresponding module halves may not differ by more than one layer.

The very last inner layer is glued to the rubber profile, making it harder to remove compared to the other layers. For simplicity, it is recommended to use a larger size of module instead of removing the last glued layer.  

In the module types UG, HD, CX, CX BG, RMX and RX BG, the last layer in each module half is not removable. The stated module sealing range does not include removal of the last layer in these module types.                   

Yes, the provided Roxtec lubricant or assembly gel shall always be used. The lubricant or gel ensures movement in the frame during compression, which is essential for even compression and correct sealing performance.

The Roxtec lubricant showed in the installation instructions ensures a safe and reliable installation, fulfilling the certificates. Customized components must be validated and may result in reduced technical ratings.

A thin film of lubricant is required on all sealing surfaces, as shown in the installation instructions. After compressing the seal, a pile of excessive lubricant will be visible on the seal's split lines. This is a good sign of correct amount of lubricant applied.                     

On ES modules, the lubricant should be avoided on the tape and the area in the frame where the tape is situated should only be lubricated sparsely.

On BG modules, avoid excess lubricant on the braid. The area inside the frame where the braid is situated should be lubricated sparsely.

It is necessary to utilize the whole packing area according to the instructions for correct sealing performance. Use a Roxtec pre-compression tool to make room for the last row of modules, to ensure that the entire packing area is correctly filled.

It is necessary to utilize the whole packing area according to the instructions for correct sealing performance. Use a Roxtec pre-compression tool to make room for the compression unit, to ensure that the entire packing area is correctly filled.

The required gap ensures that the sealing module can slide and press at the whole circumference of the cable or pipe. With no gap there will be a poor compression.

By looking at a new, unused sealing module, with two halves and a solid core, the correct gap size can be identified.

Roxtec also has a measuring kit to assist in measuring the gap. This tool is supplied with all Ex products with Multidiameter™.

Make sure to have all cables perpendicular to the aperture to reduce forces pulling the modules out. Tighten the compression screws crosswise in small steps. If necessary, pause the compression until the pressure is even in the frame.

In horizontal installations, there is a need for using installation tools to keep the modules in place. Roxtec stayplate clamps simplify holding the already installed module rows in place.

The stayplate works as an anchor, holding the sealing modules in place. Without the stayplate, the sealing modules can get pushed out at high pressure causing a big leak and danger to personnel and equipment.

Yes, one module can be installed next to four modules of half the size, i.e. one RM 60 next to 4 pcs of RM 30.

NB! You cannot mix different modules of the following types: Ex, BG or BG B.

The label on the Roxtec wedge shows the installation direction. The direction is also cast onto the wedge surfaces.

Always check the installation instructions, which often state proper torque. The Roxtec compression wedge has a built-in mechanical stop and a wedge clip that is to be attached to it. When the bolts are tightened until stop, the wedge clip will fit on top of the bolts. This is a sign of full and correct compression.

It is necessary to utilize the whole packing area according to the instructions for correct sealing performance. Use a Roxtec pre-compression tool to make room for the compression unit, to ensure that the entire packing area is correctly filled.

Roxtec has several pre-compression tools available in different sizes designed to compress from the first row of modules all the way up to the insertion of the Roxtec wedge. This makes it easer to insert the compression unit.

If the Roxtec wedge is partially inserted into the frame but difficult to fit into its correct position, it is allowed to use a rubber hammer to push the Roxtec wedge all the way into correct position.

Lubricate according to installation instructions and make sure to pre-compress before inserting the Roxtec compression wedge. Angled cables in the top rows can also tilt the wedge and push it out, so try to ensure that cables pass through the frame opening in a straight angle.

By following every step in the installation instructions, utilizing the entire, stated packing space and compressing according to the instructions. After these steps, the seal will work as intended.

The recommended torque is stated in the installation instructions. The tightening torque depends on several things, e.g cable or pipe size, amount of used lubricant, sleeve size or material in the cable sheath. Look for the signs of good compression mentioned in the installation instructions.

Tightness can only be verified by pressurizing one side of the transit. This can be done by pressurized air, water or other media that often contaminate the area being pressurized. Roxtec proposes visual inspections as a first step to reduce the need for pressurizing.

Yes, there are several inspection guides that can be used for visual inspections. They can be found here.

Tightness can only be verified by pressurizing one side of the transit. This can be done by pressurized air, water or other media that often contaminate the area being pressurized. Roxtec proposes visual inspections as a first step to reduce the need for pressurizing.

Tightness can only be verified by pressurizing one side of the transit. This can be done by pressurized air, water or other media that often contaminate the area being pressurized. Roxtec proposes visual inspections as a first step to reduce the need for pressurizing.