Goetze 642 Instrucciones De Servicio, Montaje Y Mantenimiento página 8

Lifting for maintenance purposes
In the case of safety valves with a lifting device it is recommended, and in certain
plant-specific cases even stipulated that the valves from time to time must be made
to blow-off by lifting the seal off the seat, in order to assure the correct functioning
of the safety valve. This is why they can be made to open at the latest as from an
operating pressure of ≥ 85% of the response pressure. The lifting device is not to
be operated when in a pressure-free state.
6
Dismantling the fitting
In addition to the general installation instructions it must be ensured that the
system is made pressure free prior to disassembly of the safety valve.
7
Repairs
Repair work on safety valves is only to be carried out by Goetze KG Armaturen or by
officially approved specialist workshops authorized by Goetze KG Armaturen using
original spare parts only.
8
Warranty
Every valve is tested prior to leaving the factory. We grant a warranty for our products
which entails the repair, free of charge, of any parts that are returned and verified as
being prematurely unsuitable for use due to defective material or manufacturing. We
shall not assume any liability for any damage or other such obligations. If the factory
seal is damaged, in the event of any incorrect handling or installation, non-observance
of these operating and maintenance instructions, contamination or normal wear,
warranty claims shall be null and void.
9
Marking/testing
TÜV symbol
Safety valve
Year of component test
Component test number
Narrowest flow cross-section
Code letters:
D/G (S/G) designed for steam/gas
F (L) designed for liquids
Coefficient of discharge
Set pressure in bar
We check the safety valves for pressure resistance and tightness, adjust the requested set
pressure and seal them. The identification on the type plate or on the spring bonnet of the
valve is applied using a permanent marking system. In addition markings and technical data
according to DIN EN ISO 4126-1 are included on the identification plate.
Assembly and maintenance instructions - 642, 6420, 645, 6450
TÜV. SV. xx-xxxx.xx. D/G (S/G).
www.goetze-armaturen.de
0,xx. xx
F (L)