avintos 33 Series Operating And Safety Instructions

Operating and safety instructions Mars ball valve
Operating and safety instructions
Mars ball valves series 33, 36, 39, 70, 79, 83, 88, 90, 90D, 99
1 Safety instructions for the operator
1. The user must ensure that only authorised and trained persons work on the valve.
2. Personnel charged with the installation and adjustment of the valves, must only use suitable tools and protective clothing
required for the place of operation.
3. The area where the valve is to be fitted must be clean and tidy.
4. To prevent injuries, the pipe must be depressurized, emptied and, if necessary, vented before fitting the valve.
5. Make sure that the pressure and temperature limits indicated on the ball valve rating plate correspond to, or are above, the
operational pressure and temperature conditions. The product documentation includes a pressure/temperature diagram.
6. No work (assembly, dismantling) must be carried out on the valve while it is operational.
7. The safety regulations relating to the factory and the installation must be strictly adhered to during all work on valves.
8. The valve must only be stored with the ball position fully open, and with protective end caps.
2 Use for the purpose intended
The valve may only be used for shutting off or adjusting a flow. Media flowing through can be gas, liquid or solid matter in powder or
granulated form. The individual valves must be marked according to the regulations and guidelines. The maximum permitted operating
conditions (pressure, temperature) must be adhered to, in compliance with the applicable rules and regulations and the manufacturer's
instructions. Where corrosive media are involved, the corrosion-resistance of the materials used in the valve must be observed.
3 Pressure-temperature chart of the seat rings
4 Pressure-temperature chart of the seat rings
Danger note: First depressurize the system! Remove air connections before dismantling. Dismantling must be carried out in accordance
with the usual safety regulations and safety goggles. Only hose assemblies tested in accordance with SN EN 12115 may be used.
1. Mark the position relative to the drive shaft to ensure correct assembly later on.
2. Remove the actuator.
3. Unscrew the end cap screws (pos. 18) evenly.
4. Remove the end caps (pos. 3).
5. Turn drive shaft (pos. 4) counterclockwise, thereby moving out piston (pos. 2) complete with sliding insert. Remove the piston.
6. Remove the circlips (pos. 10 and 22) on the upper and lower sides of the actuator.
7. Remove the drive shaft (pos. 4) downwards from the actuator housing. Take care that the outer teeth of the shaft do not
damage the acutator bore.
8. Remove the bearing bushes (pos. 6 and 8) together with the drive shaft.
9. Clean parts .
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