Pneumatic Connections - Siemens SIPART PS2 series Hardware Installation Manual

Installing/mounting

3.3 Pneumatic Connections

Model Option Codes
R2F Venting Gauge Block, Double Acting, ¼" NPT connections
R2E Venting Gauge Block, Double Acting, G 1/4 connections
3.3 Pneumatic Connections
Refer to Installation drawings for the locations of the pneumatic connections. The supply and
output connections are 1/4" NPT. Ideally the SIPART PS2 Venting Gauge Block assembly
should be close coupled to the actuator. Tubing of 1/4" O.D. or larger is recommended for
piping.
Blow out all piping before connections are made to prevent the possibility of dirt or chips
entering the relay. Use pipe sealant sparingly, and then only on the male threads. A non-
hardening sealant is strongly recommended. Connect the relay to a source of clean, dry, oil-
free instrument air. See Instrument Air Requirements.
NOTICE
Caution
Pressure in excess of 7 BAR (101.5 PSI) to any connection may cause damage to the
relay. In any event, maximum actuator pressure should never be exceeded.
Instrument Air Requirements
NOTICE
Caution
Use of process fluids other than instrument air is not recommended. No claim is made as to
the suitability of this product for use with other process fluids.
NOTICE
Caution
Synthetic compressor lubricants in the air system at the instrument may cause the
instrument to fail.
There are many types of synthetic compressor lubricants. Some may not be compatible with
materials used in construction of the relay. Wetting of these materials with such an oil mist or
oil vapor, etc., may cause deterioration and may ultimately result in the failure of the
instrument. Refer to Specifications for a list of materials.
The requirements for a quality air supply can be found in the Instrument Society of America's
"Quality Standard for Instrument Air" (ISA-S7.3). Basically this standard calls for the
following:
Particle Size – The particle size in the air stream at the instrument shall be no larger than 3
microns.
Dew Point – The dew point, at line pressure, should be at least 10°C (18°F) below the
minimum temperature to which any part of the instrument air system is exposed at any
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Venting Gauge Block Installation Instructions
Hardware Installation Manual, 12/2014, A5E34388399-AD