Plug valves with flushing device

Cross-flushing or indirect flushing

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Plug valves with flushing device Cross-flushing or indirect flushing

Design Features

Design Characteristics

  • cavity free
  • maintenance free, self-lubricating
  • easy accessible adjustement of the plug
  • Firesafe design API 607 / ISO 10497 (outsite)
  • face to face dimensions and flanges acc. to DIN and ANSI
  • TA – Luft 2002 approval
  • also available with actuators

AZ-Plugvalves with flushing device for plug bore cross-flushing are preferably used where products tent to deposit sediments, stick, harden, cristallize or polimerize. E.g. tary products, bitumen, sulfur, VC + VCM, UREA etc. All these products are inclined to deposit in closed plug passage, which could then lead to a total blockage of the valves. The problems can be completely prevented by plug bore cross-flushing with suitable flushing liquid. Also, cross-flushing is used to seperate varous liquids from each other or to prevent contaminations.

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 [...]

Spülungsarten

Type SP 1
Cross-flushing with connection to one side of the main line: only one flushing connection into the straight through plug with additinal bore hole, or in threeway plugs, e.g. plug form T4.

Type SP 2
Cross-flushing without connection to any side of the main line (two cross-flushing line connections: 1. intake, 2. outlet).

Type SP 3
Indirect flushing through flushing connections provided on the side of the plug (especially for steam flushing at high speed to prevent damage of the PTFE sleeve.

Type DSK
Double flushing combination with port form “T4”

Special flushing with bouncing plate on counterside etc. on request

Kuekenform-SP-DSK

Dimensions

produkt_kukenhahn-met_GB-spuelanschluss-sp-DSK

For geometric reasons, threads are used in the flange bores in a few cases

Actuation

actuation-valves-met

1 Locking Devices
Pilot valve combinations, pad lock eyelets, linear key conception, indexing plunger arrestor.
read more […]

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
read more […]

3 Actuators
Actuators for mounting-flange acc. to DIN ISO 5211
read more […]

NEW: Pneumatic actuator AIR GEAR for plug valves with high torque ≥150.000 Nm
read more […]

4 Ratched coupling
To usw on multiport valves with standard 90° actuator for bigger switchpositions than 90°
read more […]

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 […]