Operating instruction bladder accumulator BLAK - English
3
1.2
Notes on designated application
The Roth bladder accumulator (Roth pressure equipment) was manufactured exclusively for use as an
industrial and commercial component designed for acceptance and delivery of pressurised hydraulic
fluids in hydraulic systems.
Any use of the pressure equipment other than or beyond as described above or any conversion by the
operator or others shall be regarded as contrary to designated use, unless by prior written agreement
of the manufacturer.
The manufacturer shall accept no liability for damages arising from this.
The pressure equipment may only be used with non-corrosive fluids in group 2 (Art. 13, PED
2014/68/EU) on the fluid side and with nitrogen (N2) on the gas side. Wear allowance (e.g. corrosion)
is not considered. Exceptions may result from the declaration of conformity or from individual
manufacturer’s specifications of the pressure equipment.
Pursuant to ISO 4406 the degree of purity of the operating fluid shall be at least 19/17/14 (NAS 1638
Class 8) or better.
Depending on the mode of operation, the pressure equipment can be operated in the horizontal
position. Nitrogen (N2) Class 4.0 (99.99%) or better shall be used.
If permissible load cycling are specified for specific pressure ranges in the acceptance documentation,
the operator is responsible for compliance. If the pressure equipment is operated with different
operating parameters, it is possible that the test intervals for periodic tests will become shorter. Please
consult the manufacturer in such cases.
Intended use also includes compliance with the manufacturer’s operating, maintenance and
servicing instructions.
Furthermore, the operator is obliged to adhere to the legal state regulations according pressure
equipments in connection with the adherence of the mandatory tests prior to commissioning and
recurrent tests and must arrange these in compliance with the mandatory periods (see chapter 3.5).
The commissioning is prohibited until the entire system into which the pressure equipment
will be installed has been certified compliant with EU directives.
The fluids required for operation of the pressure equipment is procured and used by the
operator. Proper treatment of these fluids and the associated dangers are the sole
responsibility of the operator.
Furthermore, the selections of a fluid are into consideration low-risk operation based on
experience gained by the operator in the course of repeated use thereof in pressure
equipment.
We recommend you also concluding guarantee agreements with suppliers of the fluids.
Please request written approval from the “manufacturer” in cases of special uses or if you
have queries.
To prevent the bladder from touching the bladder connection, the pre-inflation pressure (P
0
)
must be at least 1/4 of the maximum operating pressure (P
2
).
To prevent the oil valve from closing and to extend the bladder’s service life, the pre-inflation
pressure (P
0
) should not exceed 9/10 of the minimum operating pressure (P
1
).
