ISO FSN-HF Acid Service Valve – Two-Way Plug Valve for Harsh Conditions
Two way plug valve with safety stuffingbox packing, special design for HF alkylation, Monel materials
Type ISO-FS-HF with Fire Safe sealing
Type ISO FSN-HF with triple safety sealing for fluctuating temperatures
ASME: NPS ½“ – 24“ / class 300
PT range: -29 < T < 220°C
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Design Features
Design Characteristics
- safety stem packing
- easily accessible plug adjustment
- UOP approved design for HF Alkylation
- free of cavities
- maintenance free / self lubricating
- HF detection coat for leakage indentification
- actuator mounting flange acc. to DIN ISO 5211
Approved for the highest HF Alkylation UOP Process Specifications
- AZ HF plug valves are specially designed for the use in any HF Alkylation processe and hydrofluoric acid applications
- design and material requirements as well as manufacturing and testing procedures are in accordance to the UOP process and piping specifications HF1, HF10, HF2 and HF20
PT-Diagramm
Operating temperatures < -29°C and > 220 °C have to be checked and approved by AZ according to the operating conditions.
Materials
Standard body material
- Monel, ASTM A494 M35.1
Standard plug material
- Monel, ASTM A494 M35
Standard cover material
- ASTM A216 / WCB (Monel, ASTM A494 M35.1 on request)
Sealing Systems
Type FS-HF
Firesafe sealing (API 607) with graphite packing for additional stem sealing; Tmax 220°C
Type FSN-HF
Firesafe safety sealing (API 607) for fluctuating temperatures
with 3x graphite packing (adjustable) for additional
stem sealing, Tmax 220°C
Port Forms
Fully vented Plug (FVP) prevent possibility of pressure build-up due to thermal expansion
- vented plug buttom
- vented plug side
Dimensions
Type ISO-FS-HF
Type ISO-FSN-HF
Actuation
1 Locking Devices
Pilot valve combinations, pad lock eyelets, linear key conception, indexing plunger arrestor.
2 Plug stem extension
Solid construction in stainless steel with T-wrench, Standard extension 100 mm or 150 mm, non standard lengths are available on request
3 Actuators
Actuators for mounting-flange acc. to DIN ISO 5211
NEW: Pneumatic actuator AIR GEAR for plug valves with high torque =150.000 Nm
4 Ratched coupling
To usw on multiport valves with standard 90° actuator for bigger switchpositions than 90°
5 Cover extension
Solid construction in stainless steel, Standard extension 100 mm or 150 mm high, non standard lengths are available on request . Hexagonal bolts on adjustment ring freely accessible. Note: Don’t use with sealing FSN/FSN-SL and CASN/CASN-SL