Series
KNA/F, KNAP/F, KNA-D/F, KNAP-D/F,
Page
10
KNA-S/F, KNAP-S/F
to ASME
9520-030-en
Revision 19
TM 10477
Edition 05/2022
6
Installation
♦
Examine valve for in-transit damage, damaged
valves do not install.
♦
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
♦
Contamination of or damage to the sealing
surfaces is best avoided if the protective caps
remain on the flanges until just before installation.
If plastic sealing surfaces, e.g. on mating flanges
made of metal or enamel, can be damaged, use
PTFE-lined seals with a metal inlay.
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 fitting position can be chosen.
Otherwise, it is marked by a direction arrow on the ball
valve, in the case of cavity-free ball/stem units ore
ball/stem units and Al
2
O
3
-balls with an additional relief
bore.
Fig. 1 ball/stem unit in closed position
Fig. 2 Al
2
O
3
-ball in closed position
6.3 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.
In other cases earthing is to be secured through other
measures, e.g. cable bridges.
The ball/stem unit
201
and stem
202
are grounded
using a grounding spring washer
557
.
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.
