Low-Emission Plug Valves
- AZ Sealing System Solutions for a cleaner and safer environment
- According to ISO 15848, TA-Luft and API 641
FSN-EF-RENDERING-cut
The world's first emission-free plug valve in accordance with ISO 15848-1, classification AH
Fugitive Emissions
ISO 15848 and API 641 set highest standards in order to protect people and the environment against volatile emissions and to save valuable resources.
What are fugitive emissions?
- Fugitive emissions are uncontrolled emissions of media from process plants
- This applies in particular to volatile organic compounds (VOC), such as benzene, methane or ethanol as well as other harmful media
- At valves these emissions mainly occur at the stem auf
ISO 15848 Test Setup
leakage analyzer
test media: He: Helium / CH4: Methane
stem seal adjustments (SSA)
mechanical cycles (OPEN / CLOSE) thermal cycles (UP / DOWN)
temperature range (Tmin / Tmax)
ISO 15848 Part 1 and 2
API 641
TA Luft
AZ Fire-Safe sealing systems (API 607) certified to ISO 15848-1 AH and API 641
Type FSN-EF (Emission Free)
ISO 15848-1 Code: AH-C03 SSA-0 (-46°C, 230°C) PN40/CL300
API 641 Certification: yes
plug adjustment
triple safety stem packing adjustment
Quaternary sealing: three o-rings at the stem
Tertiary sealing: triple safety stem packing
Secondary sealing: V-diaphragm (PTFE) and delta thrust collar (PTFE)
cover sealing (graphite)
Primary sealing: sleeve*
AZ Fire-Safe sealing systems (API 607)
certified acc. to ISO 15848-1 BH and API 641
Type FS2 Fire-Safe-Sealing (API 607)
with additional graphite packing
TA Luft / ISO 15848-1 certified
Class BH, SSA0 – No readjustment of the seal required!
ISO 15848-1 Code: BH – CO3 SSA0-t(-60°C, 260°C) -PN40/CL300
API 641 Certification: yes
plug & packing adjustment
Tertiary sealing: Packing to atmosphere (graphite)
thrust collar
cover sealing
stainless steel diaphragm
Secondary sealing: V-diaphragm (PTFE) + delta thrust collar (graphite)
Primary sealing: sleeve
Type FSN Fire-Safe-Sealing (API 607)
with safety seal for use at alternating temperatures
ISO 15848-1 Code: BH C03 SSA0 t(-46°C-200°C) PN40/CL300
API 641 Certification: yes
plug adjustment
triple safety stem packing adjustment
Tertiary sealing: triple safety stem packing (graphite)
cover sealing (graphite)
Secondary sealing: V-diaphragm (PTFE) and delta thrust collar (PTFE)
Primary sealing: sleeve
Type FSN-SL Fire-Safe-Sealing (API 607)
with automatic adjustment of the packing by means of disk springs
ISO 15848-1 Code: BH C03 SSA0 t(Rt-200°C) PN40/CL300
API 641 Certification: yes
plug adjustment
o-rings protect the springs against corrosion
disk springs (optionally made of Inconel)
Tertiary sealing: triple safety stem packing (graphite)
Secondary sealing: V-diaphragm (PTFE) and delta thrust collar (PTFE)
cover sealing (graphite)
Primary sealing: sleeve
*) The sleeve material has a decisive influence on the maximum operating temperature; Material selection acc. to PT-diagram
AZ Chemistry sealing systems certified acc. to ISO 15848-1 BH
Type CA2 Chemie-Abdichtung
mit zusätzlicher PTFE-Packung
TA Luft / ISO 15848-1 certified
Class BH, SSA0 – No readjustment of the seal required!
ISO 15848-1 Code: BH – CO3 SSA0-t(-60°C, 260°C) -PN40/CL300
API 641 Certification: no
plug & packing adjustment
Tertiary sealing: Packing to atmosphere (PTFE)
thrust collar
cover sealing (graphite)
stainless steel diaphragm
Secondary sealing: V-diaphragm (PTFE) and delta thrust collar (PTFE)
Primary sealing: sleeve*
*) The sleeve material has a decisive influence on the maximum operating temperature; Material selection acc. to PT-diagram
Type CASN Chemistry Sealing
with safety seal for use at alternating temperatures
ISO 15848-1 Code: BH C03 SSA0 t(-46°C, 230°C) -PN40/CL300
API 641 Certification: no
plug adjustment
triple safety stem packing adjustment
Tertiary sealing: triple safety stem packing (PTFE)
cover sealing (PTFE)
Secondary sealing: V-diaphragm (PTFE) and delta thrust collar (PTFE)
Primary sealing: sleeve*
Material for type CASN and CASN-SL chemistry safety sealing: packing and cover sealing in PTFE
Type CASN-SL Chemistry-Sealing
with automatic adjustment of the packing by means of disk springs
ISO 15848-1 Code: BH-PN40/CL300
API 641 Certification: no
plug adjustment
o-rings protect the springs against corrosion
disk springs (optionally made of Inconel)
Tertiary sealing: triple safety stem packing (PTFE)
Secondary sealing: V-diaphragm (PTFE) and delta thrust collar (PTFE)
cover sealing (PTFE)
Primary sealing: sleeve*
Material for type CASN and CASN-SL chemistry safety sealing: packing and cover sealing in PTFE
*) The sleeve material has a decisive influence on the maximum operating temperature; Material selection acc. to PT-diagram
AZ High-Pressure sealing systems certified acc. to ISO 15848-1 BH
Type HDS-GL High-Pressure Sealing
ISO 15848-1 Code: BH CO2 SSA0 t200°C CL 600
API 641 Certification: yes
plug adjustment
thrust collar
triple safety stem packing adjustment
Tertiary sealing: triple safety stem packing
PEEK bearing (top)
Secondary sealing: spiral sealing (graphite)
Primary sealing: sleeve
trunnion mounted plug / PEEK bearing