WHAT MATERIALS ARE AVAILABLE?
PVC is a synthetic thermoplastic polymer that provides excellent economical resistance to many oils and chemicals. Also provides good abrasion resistance. Not recommended for handling ketones and any other types of solvents.
Polyurethane (PU) provides excellent resistance to abrasion and tears. This material also offers exceptional flexibility and comfort, and is an extremely versatile material featuring excellent durability.
Dupont® Kevlar® provides excellent resistance to cuts, abrasion, sparks and heat. It is 2.5 times more cut resistant than cotton and will not melt or burn.
PTFE (Polytetrafluoroethylene) has very good chemical inertness and resistance to a wide range of fluids. There are only a few fluids that will attack Teflon. It has toughness over a range of 37°C to 260°C.
Neoprene is resistant to a very broad range of oils, acids, caustics and solvents, but is less resistant to cuts, punctures and abrasion than Natural Rubber or Nitrile.
ARE STITCHED BELLOWS WATER PROOF?
Stitched bellows are considered shower proof but not entirely water proof or water tight, therefore they cannot be submerged in any liquid medium, nor are they able to maintain any liquid medium. Rain or water splashing can be tolerated.
WHAT IS THE DIFFERENCE BETWEEN A RING AND A CONVOLUTION?
A ring is an individual single piece. Two rings sewn together make up one convolution (or pleat or pair). Convolutions sewn together make up a bellow.
WHEN CAN I USE A ZIPPER ON MY BELLOW?
In cases where the equipment is difficult to disassemble a zipper can be attached to the bellow.
Note however that for a zipper to be used the difference between the ID and OD of the bellow must be > 75mm.