UK

Crossover Valve Combinations

DIN: 15 – 500 / PN 10 – 40
ASME: NPS 1/2″ – 20“ / class  150 300
PT range: -30 < T < 230/280°C, vacuum 10-8 mbar

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SPEC SHEET
CERTIFICATE
A vertical industrial valve with a metallic body and a large, manual handwheel. The valve, provided by an industrial supply company in Louisiana, is equipped with flanged connections and a teal actuator in
Design Features

Design Characteristics

Design Characteristics

  • all types of AZ-valves combinable
  • for cooling and heating cycles
  • for pump cycles
  • for safety-valves
  • for filter-cycles
  • for reactor cycles
  • available hand-operated, gear-operated and with actuators

Sample applications

Four diagrams illustrating two filter systems and two pump systems, each featuring pipes, valves, and flow indicators. The components are labeled as Filter 1, Filter 2, Pump 1, and Pump

Filter-cycle
Replacement or cleaning of filter is possible without any problems by application of AZ-crossover-valve-combinations. When filter 1 is blocked up the valve combination is switched over to flow consequently regulated by filter 2. Therefore it is possible to replace the filter 1 without interruption of the continuous flow. If “LL”- plug is used moreover a continuous flow during the phase of switching is guaranteed. In this case a complete closing during switching is not possible.

Pump-cycle
On break-down of pump 1 an easy replacement of pump 1 is possible by switching the valve combination to pump 2 without interruption of the continuous flow. If “LL”- plug is used moreover a continuous flow during the phase of switching is guaranteed. In this case a complete closing during switching is not possible.

PT-Diagramm
A pressure-temperature diagram with multiple lines representing different sleeve materials and their limits, often used by a valve distribution company in Louisiana. The x-axis shows temperature in Celsius, and the y-axis shows pressure

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 reques
Sealing Systems

Type STD

Diagram illustrating the components of a standard sealing mechanism designated as type std for temperatures up to 230°c, highlighting parts like a thrust collar, stainless steel diaphragm, and PTFE sleeve

Standard sealing for all major applications;
Tmax 230°C

Type FS

Close-up of a firesafe (API 607) type FS valve with annotations pointing to its components: primary sealing with PTFE diaphragm, secondary sealing with graphite and PTFE,

Firesafe sealing (API 607) with graphite packing for additional
stem sealing; Tmax 230°C

Type CA

Close-up photo of a stainless steel industrial valve from a valve distribution company in Louisiana, with annotations showing three types of sealing: primary (diaphragm), secondary (viton collar), and tertiary (

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

Type FSN

Technical diagram showing a cross-section of a type fsn valve with fluctuating temperature resistance, highlighting its three main components: primary safety sealing, secondary sealing, and tertiary safety sealing. This illustration is provided

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

Type FSN-SL

Diagram of a firesafe safety sealing (api 607) type fsn-sl with annotations indicating primary, secondary, and tertiary sealing components, optimized for fluctuating temperatures. This design is part of our

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

Type CASN

Diagram of a chemical safety sealing system, provided by an industrial supply company in Louisiana, with annotations describing different sealing layers including primary, secondary, and tertiary seals along with their materials like PTFE and

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

Type CASN-SL

Diagram showing components of a chemical safety sealing system (type casn-sl) for fluctuating temperatures, with labeled parts like tertiary sealing, secondary sealing, and primary sealing, designed by an industrial gasket

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

Port Forms

Order the desired combination, port form select by AZ.

Dimensions
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