Table of Contents
Advertisement
Installation, Operation and Maintenance Manual
DOC.IOM.BRX.EN Rev. 2
Section 1: Introduction
This Section explains:
•
1.1
General Pneumatic System Recommendations
All Bettis RPX Pneumatic Actuators are factory lubricated with Castrol LMM grease,
and unless the operating environment is extremely harsh, do not require relubrication.
For applications where the environmental temperature ranges from -40 °C to +65 °C
(-40 °F to +149 °F), a low temperature version is available with L-NBR O-ring seals and
Cassida Grease LTS 1 grease or Castrol Opti temp TT 1 + TT 1 EP.
For applications where the environmental temperature ranges from -52 °C to +65 °C
(-62 °F to +149 °F), an extreme low temperature version is available with L-NBR O-ring
seals and MolyKote
For applications where the environmental temperature ranges from -15 °C to +150 °C
(+5 °F / +302 °F), a high temperature version is available with FKM O-ring seals and Castrol
Premium Heavy Duty grease.
To maintain maximum efficiency with this actuator, we advise that the following basic
system recommendations are followed:
1.
2.
3.
4.
5.
6.
7.
8.
9.
Introduction
General pneumatic system recommendations
33 Extreme Low temperature grease.
®
For maximum cycle life, the air quality of compressed air should be 2.4.1 as per
ISO 8573-1 standard.
Where pipelines are subjected to extremes of temperature, the system should
be fitted with suitable air drying equipment.
When working at low temperatures, it is important that the compressed air has
been dried to a dew point of less than the ambient temperature. If this is not the
case, water will be condensed from the compressed air and freeze causing damage
to the seals inside the actuator, which could result in actuator failure.
Air control lines should be fitted in accordance with a "Recommended Piping
Practice" and should not have loops, which may trap condensate.
All air connection pipe ends should be thoroughly cleaned and deburred after
cutting, to ensure that the pipeline is clear of debris.
If pipelines are hydraulically tested, then the lines should be "blown down" with
pressurized air to clear all traces of water, prior to connecting lines to the actuator.
Where pipe fitting sealants are used, they should be applied to the male threads
only, to avoid excess compound being forced into the actuator control lines.
Where air filter equipment is used, the air filters should be situated in positions
that allow easy access to maintain and/or drain.
Where pneumatic valve positioners or pneumatic controllers are fitted to the
valve actuator assemblies, oil mist lubricated air should not be used unless
the manufacturer states specifically that the controllers are compatible with
lubricated air.
Section 1: Introduction
May 2021
1
Advertisement
Table of Contents
