Richter MVMP/F Series Diaphragm Valves with Actuator - Manual (Page 9)

Series MV/F, MVM/F, MVP/F, MVMP/F
Page 9
9510-050-en Revision 02
TM 7669 Edition 10/2009
6 Installation
Examine valve for in-transit damage, damaged
diaphragm valves may 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.
Ensure that a remotely actuated actuator
cannot be accidentally switched on.
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 are glass-lined, 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
Installation is independent of the direction of flow.
Any installation position can be chosen.
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.
At the customer's request a setscrew M6 with a hex.
nut and washer will be provided at each flange as an
additional grounding connection.
Otherwise grounding must be ensured by different
measures e.g. a cable link.
6.4 Test pressure
The test pressure PT of an open valve must not
exceed the value of 1.5 x PN/PS 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 body
bolting. For torques see Section 1.3.
Unless otherwise agreed, there could be
residual amounts of water in the flow
section of the 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 1.3.
7.2 Improper operation and their
consequences
When operating in the range of below-zero
temperatures, the national regulations are to
observed.
Operation with solids leads to increased wear.
Operating during cavitation leads to increased
wear.
Non-observance of the pressure-temperature
diagram can lead to damage.
Do not subject the handwheel to heavy loads; the
handwheel or diaphragm valve may be damaged.
Do only use a handwheel without lever extension
as otherwise there is a risk of damage.
If no monitoring is provided by the warning
connection, do not tighten safety stuffing box.
Otherwise any leak cannot be seen.
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.
Prior to starting any repair work, the valve
is to be thoroughly cleaned. Even if the
valve has been properly emptied 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 6.1.
Ensure that a remotely actuated actuator
cannot be accidentally switched on.