11
|
www.trilliumflow.com
DANGER
WARNING
CAUTION
CAUTION
Never face the outlet of a
valve when it is
discharging as this may
result in serious personal
injury or death
Protect against high noise
levels which occur during
popping tests. Keep a
safe distance when the
test is being performed.
Helmets and gloves must
be worn to prevent any
injures while operating or
working on the valve.
Be aware that the
environment might be
extremely hot. Care should
be taken if there is any
potential steam leakage.
Superheated steam is
invisible
8 INSTALLATION
8.1 GENERAL
7.2 INLET PIPING
Piping systems and equipment through which the fluid flows must be thoroughly cleaned. Dust, deposits and metal particles must
be removed using controlled blasts of compressed air or steam.
The presence of any solid particles between the safety valve and its seat faces will have damaging effects. Any leak will lead to
improper functioning and erosion of the seating surfaces. Such erosion develops quickly, due to the high pressure. The system
should always be purged before safety valve is installed.
Prior to installation of the safety valves, all protective covers must be removed. It is recommended that any surfaces in contact with
gaskets are checked. Dimensions of gaskets should be checked: gaskets must not obstruct inlet or outlet orifices.
A pressure relief valve will only operate correctly if all installation procedures are observed.
If the inlet pressure drop is excessive, it may generate chattering effect during operation of the valve. Chattering may in turn be the
cause of seat damage, or spindle deformation.
In order to avoid chattering, the following recommendations should be followed to reduce pressure drop:
• A rounded concentric reducer from the installation will create a minimum of turbulence.
• The inlet piping must be as short as possible and direct.
• A safety valve must not be installed on piping which has a nominal diameter of less than the nominal inlet
diameter of the safety valve.
• The safety valve must not be subjected to excessive vibration which might be transmitted by the installation.
74LP PRESSURE RELIEF VALVE
SARASIN-RSBD
™
