SNB-SNC ball valves
Installation and Maintenance Instructions
Emerson reserves the right to change the contents without notice
page 7
11. Cause and remedy of operating faults
If the valve function or operating action is faulty, a check should be made to ensure that the
assembly and installation work has been carried out and completed in accordance with the
installation and maintenance instructions.
The information relating to material, pressure, temperature and direction of flow should be
compared with the installation diagram of the pipeline system. Furthermore, a check should be
made on whether the installation conditions correspond to the technical data given in the data
sheet or on the rating plate.
The safety regulations must always be observed when troubleshooting.
Repair work must only be carried out by the manufacturer’s trained personnel.
12. Decommissioning
Removal of the valve for repair or servicing is often carried out carelessly, as the valve has to be
repaired or replaced in any case. However, it is recommended that the valve is removed with
care, without damaging the PTFE, so that the possible cause of damage can be determined after
removal.
Attention! Check that the pipe is depressurized and drained.
With corrosive, inflammable, aggressive or toxic media, ventilate the pipeline system.
- Only allow assembly work to be carried out by qualified personnel (see Section 2.3)
- Almost fully close the valve (note position of the flat sections of the control shaft)
- Loosen all flange bolts and withdraw them until the valve can be removed
- Spread the flanges apart using a suitable tool and withdraw the valve
13. Spare parts
Always provide the information in accordance with the rating plate fitted on the mounting flange
when ordering seals and other spare parts.
15. Customer service
For further information or technical advice please contact:
Neotecha AG
Etzelstrasse 37-39
CH-8634 Hombrechtikon / Switzerland
Telephone : +41 (0) 55 - 254 41 41
Fax
: +41 (0) 55 - 254 41 00
16. Validity of the Installation and Maintenance Instructions
These installation and maintenance instructions are valid from 01.09.2001 until the next revision.
14. Disposal
Hand in the correctly cleaned valve to the scrap material recycling plant.
Badly cleaned valves can cause severe burning of the hands
and other parts of the body.
If the valve is passed on to a third party, the manufacturer no longer guarantees the valve.
