5
Maintenance-free operation
The shafts of theCENTERLINE
Butterfly Valves Series VIA/RS
aremounted in self-lubricating
DU bearing bushes so that there
is no need for maintenance even
after a long operating period.
Shaft lock
All CENTERLINEButterfly Valves Series VIA/RS
feature a lock at the valve neck avoiding a
blowing-out of the shaft during the valves
operations life.
Actuatormounting
All CENTERLINEButterfly Valves Series VIA/RS
feature amounting in accordancewith ISO 5211
for themounting of hand lever, gear, pneumatic
REVO or other automatic actuators.
Aconversion even during operation from
manual to automatic actuator and reverse is
possiblewithout any difficulties.
Actuator adaptation
CENTERLINEButterfly Valves Series VIA/RS
are available for 3 closing pressures (operating
pressures) 3.5 bar (51 psi), 10 bar (145 psi)
and 16 bar (232 psi). The actuator size can be
selected individually against the pipeline
pressure available, so that with lower pipeline
pressures even smaller actuators can be
utilised due to the lower torques.
2
1
6
7
4
3
8
9
5
2
1 Shaft
2 Bearing bush
3 Body
4 Shaft lock
5 Citclip
6 Body lining
(with vulcanized back-up ring)
7 Disc
8 Dowelling
9 Lower Stem
