Plug valve for Double Block & Bleed and Inspection-Service

DIN-EN: DN 15 – 600 / PN 10 – 40
ASME: NPS ½“ – 24“ / class 150 – 300
PT range: -30 < T < 230/280°C, vacuum 10-8 mbar

Spec Sheet
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Plug valve for Double Block & Bleed and Inspection-Service

Design Features

Design Characteristics

  • PTFE-sleeved plug for large sealing surface – reliable and tight
  • “double block & bleed” possible with only one valve
  • suitable for critical service
  • long durability – adjustable plug
  • outlet positions customized
  • cost saving compared to 2 valve system
  • alternative to traditional “lift and turn” plug valves
  • Firesafe acc. to API 607 / ISO 10497 (only externally)
  • TA – Luft approval

Sample applications

Kontruktion-GB-DBI1

Type 1
Bleed valve for testing the tightness of closed valve

Type 2
Bleed valve for testing the tightness of closed valve
Inspection valve “#1” upstream for inspection and revision services

Type 3
Bleed valve for testing the tightness of closed valve
Inspection valve “#1” upstream for inspection and revision services
Inspection valve “#2” downstream for inspection and revision services

PT-Diagram

PT-Diagramm-2015-GB

Operating temperatures < -30°C and > 220 °C have to be checked and approved by AZ according to the operating conditions.

Besides the P/T value of the sleeve the limitations of the valve bodies also have to be considered. Please refer to the EN 12516-1 resp. ASME B16.34 in order to choose a proper pressure rating (PN/class). The shown values refer to austenitic stainless steel 1.4408 (A351 Gr. CF8M).

1) For operating temperatures below -10°C low temperature / austenitic steels are required.
2) Sleeve: There are different sleeve materials / compounds available.

Materials

Standard body materials
• Carbon Steel 1.0619, ASTM A216 WCB
• Stainless Steel 1.4408, ASTM A351 CF8M
• Stainless Steel 1.4308, ASTM A351 CF8
• Unalloyed stainless steel casting (low Temp.) 1.1138, LCC/LCB/A352

Standard plug materials
• Stainless Steel 1.4408, ASTM A351 CF8M
• Stainless Steel 1.4308, ASTM A351 CF8

Special materials
• Alloy
• Monel
• Nickel
• Zirconium
• Titan
• Tantal
• other materials on request

Sealing Systems

Standard sealing for all major applications;
Tmax 230°C

Type STD

read more [...]		Firesafe safety sealing (API 607) for fluctuating temperatures
with 3x graphite packing (adjustable) for additional
stem sealing; Tmax 280°C

Type FSN

read more [...]
Firesafe sealing (API 607) with graphite packing for additional
stem sealing; Tmax 230°C

Type FS

read more [...]		Firesafe safety sealing (API 607) for fluctuating temperatures
with 3x graphite packing (live loaded disc springs) for additional
stem sealing; Tmax 280°C

Type FSN-SL

read more [...]
Chemical sealing to prevent fugitive emission of aggressive and toxic media
with PTFE packing for additional stem sealing; Tmax 230°C

Type CA

read more [...]		Chemical safety sealing for fluctuating temperatures
with 3x PTFE packing (adjustment) for additional stem sealing;
Tmax 230°C

Type CASN

read more [...]
Chemical safety sealing for fluctuation temperatures
with 3x PTFE packing (live loaded disc springs) for additional
stem sealing; Tmax 230°C

Type CASN-SL

read more [...]

Port Forms

Kuekenform-D

Dimensions

The valve type DBI is available in all common sizes acc. to DIN / ASME

Actuation

actuation-valves-met

1 Locking Devices
Pilot valve combinations, pad lock eyelets, linear key conception, indexing plunger arrestor.
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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
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3 Actuators
Actuators for mounting-flange acc. to DIN ISO 5211
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NEW: Pneumatic actuator AIR GEAR for plug valves with high torque ≥150.000 Nm
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4 Ratched coupling
To usw on multiport valves with standard 90° actuator for bigger switchpositions than 90°
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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
read more […]