Dispositivo especial para comutação de válvulas de segurança

DIN: 25E – 500E / PN 10 – 40 ASME: NPS 1″E – 20“E / class  150 300 PT range: -30 < T < 230/280°C, vacuum 10-8 mbar

Especificações
Certificado
Orçamento

Design Features

Características construtivas

  • Fluxo pleno com seção transversal circular
  • A vedação não tem contato com o fluido (após operação)
  • Alta capacidade de estanqueidade conforme API598
  • Segurança total para os operadores e meio ambiente
  • Coeficiência de vazão garantido durante toda a operação
  • Não há possibilidade de erro operacional
  • Retorno seguro do “volume residual”
  • Combinações econômicas (sem reduções)
  • Aprovação TÜV

O príncípio básico do dispositivo de segurança consiste de que uma seção transversal mínima (Amin) está garantida durante a fase de comutação entre a válvula de segurança 1 e a válvula de segurança 2. Esta área de passagem garante o coeficiente de vazão mínimo do sistema e com isso a segurança do vaso de pressão.. Konstruktionsprinzip-SAVA


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

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

Type FSN

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

Type FS

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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

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

Type CA

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

Type CASN

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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

on request


Dimensions

Techn-Daten-GB-SAVA 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 […]