HONGDA bladder accumulators hydraulic cylinder consist of a welded or forged pressure vessel, an accumulator bladder and valves for gas and oil inlet. The gas and oil sides are separated by the bladder.

2.1 Bladder Materials
The following elastomers are available as standard:
--NBR (acrylonitrile butadiene rubber, Perbunan)
--IIR (butyl rubber),
--FKM (fluoro rubber, Viton®),
--ECO (ethylene oxide epichlorohydrin rubber).
The material used depends on the respective operating medium and temperature.

2.2 Corrosion protection
For use with chemically aggressive media the accumulator shell can be supplied with corrosion protection, such as plastic coating on the inside or chemical nickel plating. If this is insufficient, then nearly all types can also be supplied in stainless steel.