Bottom Repairable Bladder
The bladder accumulator consists of a fluid section and a gas section, with the bladder acting as a gas-proof screen. The fluid around the bladder is connected with the hydraulic circuit, so that the bladder accumulator draws in fluid when the pressure increases thus compressing the gas. When the pressure drops, the compressed gas expands and forces the stored fluid into the circuit.
The following bladder materials are readily available. Buna-N bladders and seals are standard and are suitable for most fluid power applications. Other materials are offered to provide compatibility with a wide range of fluids, working temperatures and permeation requirements. Please consult your Eaton representative when special requirements are encountered.
For use with certain aggressive or corrosive fluids, or in a corrosive environment, Eaton offers protective coatings and corrosive resistant materials (i.e. stainless steel) for the accumulator parts that come in contact with the fluid, or are exposed to the hostile environment.
BN - Buna-N (nitrile)(5º-180ºF using mineral oil)
- VT - Fluorocarbon (viton)(5º-300ºF)
- BL - Butyl(-40º-200ºF)• EP - Ethylene Propylene
- CW - Special nitrile blendfor low temperature applications(-40°F to 180°F)
- HL - Hydrin for applications requiring extremely low permeation.
To determine which material is appropriate...ALWAYS REFER TO FLUID MANUFACTURER’S RECOMMENDATION
EATON bladder accumulators can be installed vertically, at any angle, or horizontally depending upon the application. When installing vertically or at an angle, the fluid port must be at the bottom. On certain applications listed below, specific positions are preferable:
- Energy Storage: vertical
- Pulsation Damping: any position from vertical to horizontal
- Maintaining Constant Pressure: any position from vertical to horizontal
- Volume Compensation: any position from vertical to horizontal
Eaton bladder accumulators are designed to be screwed directly onto the system. We also recommend the use of our mounting components, which are detailed on page 21, to minimize risk of failure due to system vibrations.
Eaton bladder accumulators consist of a welded or forged pressure vessel (shell), a bladder and ports for gas and fluid inlet. The gas and fluid sides are separated by the bladder.
Some common applications of bladder accumulators are:
- Agricultural Machinery & Equipment
- Forestry Equipment
- Oil Field & Offshore
- Machine Tools
- Mining Machinery & Equipment
- Mobile & Construction Equipment
- Off-road Equipment