Richter GS Series Strainers - Manual (Page 8)

Series GS
Page 8
9540-060-en Revision 05
TM 6506 Edition 05/2006
6 Installation
Examine valve for in-transit damage, damaged
globe shut-off or control valves must not be
installed.
Before installation the valve and the connecting
pipe must be carefully cleaned to remove any dirt,
especially hard foreign matter.
During installation, pay attention to the correct
tightening torque, aligned pipes and tension-free
assembly.
6.1 Flange caps and gaskets
Leave protective caps on the flanges until just prior to
installation.
Where there is a particularly high risk of damage to
the plastic sealing surfaces, e.g. if the mating flanges
are made of metal or enamel, PTFE-lined gaskets with
a metal inlay should be used. These gaskets are
available as special accessories in the Richter range.
6.2 Direction of flow and
installation position
The direction of flow must be observed when installing
the valve.
It is indicated by a direction arrow on the valve shell.
The installation position must always be such that the
strainer can be drained from the bottom when the
strainer basket is removed.
An incorrect installation position can result in a drop in
performance or failure of the function.
Observe remove height A in acc. with the drawing in
Section 10.2.
6.3 Grounding
The valve must be grounded. The simplest solution is
to use tooth lock washers which are placed under one
pipe bolt of each flange.
Otherwise grounding must be ensured by different
measures e.g. a cable link.
6.4 Test pressure
The test pressure PT of a valve must not exceed the
value of 1.5 x PS(PN) as per the identification of the
valve.
7 Operation
7.1 Initial commissioning
Normally, the valves have been tested for leaks with
air or water. Prior to initial operation check cover
screws. For torques see Section 1.2.
Unless otherwise agreed, there could be
residual amounts of water in the flow section
of the ball valve; this could result in a
possible reaction with the medium.
To prevent leaks, all connection screws should be
retightened after the initial loading of the valve with
operating pressure and operating temperature. For
torques, see Section 1.2.
7.2 Improper operation and their
consequences
Avoid excessive contamination as otherwise high
pressure losses and damage to the valve may
occur.
Non-observance of the pressure-temperature
diagram can lead to damage.
7.3 Shutdown
The local regulations are to be observed when
dismantling the valve.
Prior to undoing the flange connection ensure, that the
plant is depressurised and emtied.
It must be noted that there is still medium in the
strainer basket area. Open cover 106 and drain
residual medium.
Prior to starting any repair work, the valve is
to be thoroughly cleaned. Even if the valve
has been properly emtied and rinsed,
residual medium may still be found in the
valve,
After dismantling, immediately protect the valve
flanges against mechanical damage with flange caps.
See also Section 5.1.