The NAF wedge gate valve is an ideal solution for use in
installations where medium class pressure applications
are present. This valve offers very high corrosion resistance
and extremely long life cycles and offer a high
degree of realibility. The distinctive characteristic of this
valve type include:
· Full bore
· Flexible wedge
· Rising stem
· Handwheel with bearing
· Sealing surfaces machined directly in the
material of the body
CE-marked according to Pressure Equipment Directive
(PED 97/23/EG) module H, category III
Design
The valves have a rising stem, outside screw, and
handwheel with stem nut mounted in needle thrust bearings.
Full bore. Flexible guided wedge. Backseated stuffi
ng box protects the packing in service. The seat facings
are machined directly in the body and gate.
The bonnet of sizes DN 80—300 is in one piece. Sizes
DN 350 and larger have a bolted yoke. The wedge gate
valves can also include an actuator.
Contact NAF for further information about selection of
electric actuators.
The design of connection fl anges of various sizes of
wedge gate valve is stated under ”Connections” below.
Applications
This type of valve is intended for shut-off applications
with media that do not attack the material. The packing
material of the valves is resistant to most acids and alkalis
at temperatures up to 250°C.
Connections
The valves are delivered with fl anges with raised face acc.
to PN 16 to the following standards for DN 80-500.
