Installation; Flange Caps And Gaskets; Grounding; Direction Of Flow And Installation Position - Richter KNAR/F Series Installation And Operating Manual

Series KNAR/F, KNARP/F, KNAR-D/F, KNARP-D/F,
KNAR-S/F, KNARP-S/F
6

Installation

♦ Examine valve for in-transit damage, damaged ball
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.
♦ Observe direction of flow.
♦ 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 or enamel, PTFE-lined gaskets
with a metal inlay should be used. These gaskets are
available as special accessories in the Richter range.
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 tightening 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.
9520-032-en Revision 15
TM 9549 Edition 11/2018
ASME
6.2

Grounding

The valve must be grounded. This can be achieved in
the simplest way via the pipe screws using tooth lock
washers. One pipe screw per flange is underlaid with
toothed disks.
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.
The V-control ball/stem unit 201 is grounded using a
grounding spring washer 557.
6.3 Direction of flow and installa-
tion position
Any fitting position can be chosen.
A direction arrow on an additional name plate for
control ball valve shows the direction of flow. See
Section 1.1 and 10.
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.
To prevent leaks, all connection screws should be
retightened after the initial loading of the valve with
operating pressure and operating temperature.
For tightening torques, see Section 1.3.
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