Page 11 - Desalination technology
P. 11
PTFE Valves
SHAFT BEARING
All nominal diameters have
a multiple, maintenance-
free shaft bearing.
BODY & COATING SAFETY SEAL
Precision machined bodies form the
basis for perfect sealing of the liner The one-piece, blow-out proof
and precise positioning of the shaft. shaft/disc is coated with PFA
including the safety seal. The disc
All working surfaces fully machined. is covered with at least 3mm. All
High Protection against enviroental sealing surfaces are machined.
influences. Coating acc. to C3 or C4 for
indoor use, C5M coating for outdoor use.
INTERNAL BODYSCREW
The bodyscrew is mounted within
the body and thus protected PTFE LINER
against corrosion. The PTFE liner is isostatically
pressed and at least 3 mm
thick. The broad, chambered
sealing strips also serve as a
double-sided flange seal.
BALL PRINCIPLE
The proven seal according
to the ball principle between
disc and PTFE liner ensures DOUBLE SEALS
reliable long-term operation, Double seals as standard on both shaft
without critical transitions.
ducts. Primary seal (= main seal) achieved
by prestressing through maintenance-free
set of stainless steel disc springs.
Secondary seal (= EBRO safety seal)
is safely achieved through a matched
combination of a PTFE-Chevron seal and
an additional O-ring.
APPLICATIONS CERTIFICATES
• Chemical dosing lines • T.Ü.V
• Pretreatment • PED
• SIL
