Series PA/F, PA/S
Page
10
9510-010-en
Revision 18
TM 9549
Edition 11/2018
6.8 Needle adapter for PA/S DN25
When you use a stainless steel needle adapter for
PA/S DN25 make sure that you insert the flat gasket.
7
Operation
7.1 Initial commissioning
Normally, the valves have been tested for
leaks with air or water. Prior to initial oper-
ation check cover screws. For tightening
torques, see
Section 1.2
.
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 tightening torques, see
Section 1.2
.
7.2 Improper operation and their
consequences
♦
Crystallisation must be prevented, e.g. by heating.
Damage to the seat or cone would be inevitable.
In extreme cases a leak may occur.
♦
Increased wear occurs in operation with solids con-
tents.
♦
Violent opening or rapid filling may cause the bottle
to burst.
♦
Non-observance of the pressure-temperature dia-
gram can lead to damage.
♦
Do not transport the valve using the lever.
♦
Do not use a lever extension as otherwise there is a
risk of damage.
♦
At the customer's request, the middle hole in the
lever is drilled through. If the lever is then locked in
the lower hole to take samples and if, in addition, a
pin is inserted into the middle hole, it must be en-
sured that sampling does not take place acci-
dentally.
