Staubli TX Series - Pressurization System for Dusty Surroundings or Spattering with Liquids; Purpose; Installation

Chapter 2 – Description
D28065504A - 02/2007 57
2.9. PRESSURIZATION SYSTEM FOR DUSTY SURROUNDINGS OR SPATTERING
WITH LIQUIDS
2.9.1. PURPOSE
For very severe applications in dusty surroundings or with spattered liquids, the objective is to keep the
pressure inside the arm above atmospheric pressure in order to avoid migration of dust and liquids.
2.9.2. INSTALLATION (figure 2.19)
• Use orifice (P3) to connect the pressurization system to the base of the robot.
• Attach the unit with 4 screws (Ø6 max.) at item (8) (screws not supplied) to a rigid vertical wall in direction
shown by arrow; the air inlet (1) being to the left of the regulator (2).
• Provide for air inlet at (1), this is a G1/4 tapped hole; the air pressure is 10 bar maximum. Before the
pressure arrives at (1), make sure that the regulator (2) is completely screwed out and that the valve (3)
is completely screwed in. Before pressurizing the arm, also make sure that the arm is correctly connected
and fully sealed (covers closed, plugs in the tapped holes in the arm, hose connected at (6) and (P3), etc.).
• Install a pipe with an outside Ø8 between the unit (output 6) and the arm (input P3). At (P3), the hole is
a G1/8 tapped hole.
• Pressurize the arm:
1) Slowly screw in the regulator. First adjust the pressure to 1bar max. (pressure shown on pressure
gage 9).
Note:
At this stage, the low pressure gage (5) must remain at 0mbar.
2) Very slowly screw out the valve (3); the value on the pressure gage (5) must increase
progressively. When this value reaches 5 to 10 mbar and remains stable, adjustment is
considered as correct.
• If however the valve (3) is completely screwed out and it is impossible to reach 5mbar, check that:
a) The circuit is tight (unit, arm, pipe, etc.).
b) The pressure gage (5) is not unserviceable (damaged by a pressure greater than
40 mbar).
If the 2 points a and b are correct, the pressure can be increased by means of the (2) regulator without
however exceeding 2bar.
Note:
For safety reasons (valve 4 opens between 15 and 25 mbar) and to reduce consumption
levels, it is preferable to work at low pressure.
CAUTION:
The overpressure must never exceed 20 mbar (0.28 psi).
CAUTION:
An excessive value (above 40 mbar (0.57 psi)) will make the pressure gage (5) unusable.