DA 4000 pages

AIR PRESSURE UNIT DA 400
For applications where the Linear
Encoders are used in harsh
environments (e.g. oil and coolants),
RSF offers a method of extra protection
beyond the enclosed unit´s standard set
of sealing lips.
An air inlet can be provided for filtered
air to be input into the scale spar.
A limiting flow restrictor helps set
the optimum overpressure airflow
inside the scale spar to further prevent
oil and coolants from entering the seal.

To ensure fail-safe operation of the Linear
Encoder, only „clean“ and pretreated air
should be put into the scale housing.
The scale cavity should have a flow
rate of about 7 to 10 l/min (per Linear
Encoder). The setted overpressure
(adjustable from 0.5 to 3 x 105 Pa)
depends on the number of the connected
Linear Encoders (max. 10 Linear Encoders)
and the design of the compressed-air supply.

DA 400 consists of three filter stages
(prefilter, fine filter and activated carbon
filter) and a pressure regulator with pressure gauge.
To reach the promised accuracy
of the measuring system,
the air temperature has to be +20 °C.

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