Goetze 617 Serie Manual De Uso página 13

6
Operating and Maintenance
The operating pressure of the plant is to be at least 5 % lower than the closing
pressure of the valve if it is used as a pressure limiting valve. In this way, the valve
can satisfactorily close again after blowing off.
In the event of minor leaks, the valves can be made to respond by lifting the lever
for version 618 sGFL (the lever is not used for adjusting the valve!), or by applying
overpressure for the remaining model series. If this does not remove the leak the
valve has to be overhauled. After long periods of non-use the function of the valve
must be tested.
For the valves of the types 418 (fig. a) and 630/430 / 631/431 (fig. b) there is a
replacement cartridge which can be changed when the installation is pressureless.
For the type 418 the cartridge can be delivered as a replacement part which was
preset and sealed at the factory.
Fig. h), i): Type 630 / 430 / 631 / 431:
1. Remove plastic protective cap; loosen counter-nut.
2. De-tension the spring by turning the setting spindle clockwise.
3. Unscrew spring housing or remove screws.
4. Remove spring housing, spring plate, setting spindle, and spring.
5. Re-fit two screws on opposite sides of the body. These are required as supports
for the levering tools (only required for sizes DN65 and DN80). By means of
two screwdrivers ( levering tools ) remove the complete valve insert (fig. b) and
replace with a new one.
6. Installation is carried-out in reverse order. In the case of sizes DN65 /DN80
tighten the screws equally with a maximum torque of 18 Nm, this value must not
to be exceeded!
7
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 manu-
facturing. We shall not assume liability for any damage or other such obligations. If
the factory seal is damaged (in the case of pressure limiting valves), in the event of
any incorrect handling or installation, contamination or normal wear, warranty claims
shall be null and void.
8
Marking
Valves adjusted at the factory have the set pressure marked in a permanent manner
on the nameplate (type 418, 430/630, 431/631, 853/453) or on a brass label that is
attached to the valve. For valves that are not adjusted at the factory the range of adjust-
ment for the installed spring is specified on it.
www.goetze-armaturen.de
13