ARI-ZETRIX 018 Threaded flange process valve with metallic sealing - Triple offset
What is "triple offset"?
The rotating shaft of the disc is offset from the centre line of the disc seat and body seal (first offset) and the pipes centerline (second offset).
With triple offset process valves, the seat's axis of rotation is also asymmetrical to the pipe axis (third offset).
Benefits:
Frictionless swivel movement.
Low torque
Permanently leak-proof due to the metal seal principle.
Versatile applications with regard to media and temperature.
Reliably tight – even in toughest industrial environments
Due to the triple offset disc design (maximum closing force with minimum effort).
Due to the “smart” sealing ring (uniform closing force, the ring is self-aligning and free-floating on the sealing surface).
Due to a wide range of additional safety options.
Due to the stellited seat (Stellite™ No. 21) as standard version.
Due to the metal seal principle.
Durability:
Long and maintenance free service life due to the stellited seat.
Rotary movement without wear or friction (seat and sealing ring) due to the optimised contact angles.
Hardened stainless steel bearings.
Options:
"Clean air" bus acc. according to TA-Luft / ISO 15848
Blow-out protection acc. to API 609
Double packing with discharge pipe (e.g. for thermal oil services)
flushing port for the shaft bearings and buffer port for protecting the stuffing box
Flushing port for the bottom flange
Welded bottom flange
Test port
heating mantle
RTJ / Tongue-and-groove flange
Solid sealing ring for special applications
Performance features at a glance:
Design: EN 12516, ASME B16.34, API 609
Flange connection *: EN 1092, ASME 16.5, ASME 16.47
Butt-weld ends*: DIN EN 12627, ASME B16.25
Nominal diameter *
Double flange: DN 80-1400 / 3" to 56"
Fully lugged: DN 80-600 / 3" to 24"
Butt-weld ends: DN 80-800 / 3" to 32"
Nominal pressure *
PN 10-40, PN 63, PN 100 / Class 150, Class 300, Class 600
Face to face *
Double flange: DIN EN 558-1 Series 13, 14 and 15,
ISO 5752, API 609
Fully lugged: DIN EN 558-1 Series16, ISO 5752
Butt-weld ends: DIN EN 558-1 Series14, ISO 5752
Material:
Cast carbon steel (1.0619 +N; SA216WCB)
Cast stainless steel (1.4408; SA351CF8M)
Performance features at a glance:
Temperature: -60°C to +450°C
Flow media: Liquids, gases, vapours
Actuators:
Manual gearbox, pneumatic, electric, hydraulic drives
Approvals:
Firesafe, TA-Luft / ISO 15848-1, SIL, ATEX, EAC
Typical applications
Oil and gas processing, refineries, petrochemicals,
chemicals, power plants, district heating, solar thermal
power stations, pulp and paper, steelworks, sugar
processing, industrial and plant manufacturing —
reference lists on request.
Other designs on request
Design:
Body acc. according to EN 12516, ASME B16.34 and API 609.
Tight metal closure.
Triple offset seal geometry.
Flexible, self-adjusting, lamellar metal sealing ring (floating).
Optimized characteristic allows switch-off and control function.
Extended hood suitable for pipe insulation from -60°C to +450 °C.
Easy to automate due to the actuator interface incl. position indicator acc. according to ISO 5211
Safety:
Density (bidirectional) according to leakage rate A in according to EN 12266, API 598.
Bearing protectors.
Blow-out protected stem, optionally also according to API 609.
Lock washer and thrust bearing bolts locked.
Pressure-temperature profile acc. according to EN 1092, ASME B16.34.
Approvals: Firesafe, TA-Luft / ISO 15848-1, SIL, ATEX, EAC.
Applications:
Oil and Gas Processing
refineries
petrochemical
chemicals
power plants
district heating
solar thermal power plants
pulp and paper
steel mills
sugar processing
industrial and factory production
ship-building
specific applications in HVAC
Medium:
refrigerant
cooling water
hot water
hot water
thermal oil
steam
gas
alkalis
acids
deionized water
pure steam
