HKS rubber expansion joints of Type 3, Construction types HZB, HZG, HZR are supplied including malleable iron or stainless steel screw fittings on both sides.
| Available rubber bellows qualities | |
|---|---|
| HZB | Composition of IRN/nylon cord/IR, suitable for cold and warm water, process water, acids, alkalis, esters and ketones. ACS certification available. |
| HZG | Composition of NBR/Nylon cord/CR, suitable for mains and natural gas, fuels, lubricating oils, fuel oil, coolant emulsions and sea water with oil residues. |
| HZR | EPDM, suitable for the sanitation, heating, pipeline construction, chemical and solar industries. |