Bladders for pneumatic shafts are inflated to push out the clamping elements. As long as the bladder is inflated, the shaft is in expanded state and will hold the core. There are various types of airshafts with a central hose system (one hose is responsible for the expansion) and systems with several flat bladders, known as multibladder airshafts.
CENTRAL HOSE SYSTEMS
Airshafts with central hose system are activated by inflation of the central hose. The hose is located in the shaft body and is responsible for the expansion of the clamping elements. Usually an axial or radial air valve is mounted in the shaft for inflation and deflation of the hose. There are numerous types of central hose systems depending on airshaft brand, type and building year. In the past, hose clamps where used to fixate the hose. This system is still functioning in older winding shafts. Problem is that the clamps can damage the bladder if the shaft is inflated and deflated frequently.
Newer designs are equipped with special end-caps. The design of the end-cap differs per manufacturer. Most of the time we are able to replace your hose system with a better solution or with the original package.
PRODUCT REFERENCE : CLAMP001
Most end-caps can be removed from the hose easily and without any special tools. If these caps are not damaged, is should be possible to replace only the hose itself. In that case you can send us the details of your hose (thickness, diameter, length) and we will send you our quotation. We are also able to deliver preassembled hose systems (together with the caps, O-rings, etc), separate end-caps (depending on shaft type and brand) or a complete roll with suitable hose for your airshafts.
PRODUCT REFERENCE : BLADDER001
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Always refer to the length, the outerdiameter AND innerdiameter of the bladder required.
MULTI BLADDER SYSTEMS
You can find multiple Layflat hoses in your Multibladder (strip type) airshafts. Each hose is responsible for expansion of his “own” strip. Although they all look the same, there are various dissimilar Layflat hoses available depending on the presence of protection layers, depth of the chamber and stripe material.
If improved protection material is used, the cavity is often reduced and the bladder thickness becomes important. Best procedure to take measurements is to flatten the bladder completely (without deforming it) and measure the inner and outer diameter (so the wall thickness can also be calculated), length and wideness.
Make sure that your new bladder is protected with our special offered protection material (reference BLADDER003 and BLADDER004) . Best is to combine replacement of Layflat hoses with renewal of the stripes, to gain a perfect condition of your airshafts.
REFERENCE : BLADDER002 |
REFERENCE : BLADDER003 |
REFRENCE : BLADDER004 |
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