Goetze 455 Manual Del Usuario página 10

2
General Notes
Safety valves are high-quality fittings which require a particularly careful handling.
The sealing surfaces are precision-machined at the seat and cone to attain the
required tightness. Always avoid the penetration of foreign particles into the valve
during assembly and during the operation. The tightness of a safety valve can be
impaired when using hemp, Teflon tape, as well as through welding beads, among
other things. Rough handling of the finished valve during storage, transport and
assembly can result in a valve leaking. If the valves are painted, make sure that the
sliding parts do not come into contact with the paint.
3
Range of Application
For details on the range of application of the individual versions please refer to the
datasheets of the manufacturer.
4
Installation and Assembly
Spring-loaded safety valves are to be installed with the spring bonnet pointing ver-
tically upward. To guarantee perfect function of the valves, they must be mounted
so that no unauthorized static, dynamic or thermal loads can take effect. Suitable
protective measures must be taken if escaping medium can result in direct or
indirect risk to persons or the environment if the body responds. Medium escaping
through open spring bonnets must also be considered.
Supply line
Supply line supports for safety valves should be as short as possible and are to be
designed so that no higher pressure losses than max. 3% of the response pressure
can occur at full valve load.
Condensation drainage line
In the event of possible condensate formation the pipes or the valves themselves
must be fitted at their lowest point with a continuously operating condensate
discharge device. Please make sure that the condensation or escaping media
is safely drained away. The body, lines and sound absorbers must be protected
against freezing.
Blow off line / counterpressure
The safety valves blow off line is to be designed so that the necessary mass flow
can be discharged depressurized when blowing off. For safety valves with metal
bellows, a counterpressure of up to max. 4 bar does not impair the response pres-
sure of the safety valve when discharging.
Assembly and maintenance instructions - 455, 355, 255 www.goetze-armaturen.de