Válvulas industriais conforme normas API · ASME · DIN · EN

Válvulas de Gaveta com Selo de Fole

As válvulas de gaveta com selo de fole substituem o prensaestopas da haste como vedação primária por um fole metálico soldado entre castelo e haste; o fole se estica e comprime com o curso da haste, de modo que nenhum movimento da haste abre um caminho de vazamento. O fole e o prensaestopas formam uma estrutura de dupla vedação, e os conjuntos são testados com hélio para vazamento zero, razão pela qual essa construção serve a funções de emissões fugitivas em serviço tóxico, inflamável ou de vácuo. A faixa fundida de referência cobre NPS 2" a 30" (DN50 a DN1650) e ASME Classe 150 a 1500 (PN16 a PN260), em corpos de aço carbono, inox, liga, baixa temperatura, duplex e base níquel com terminais RF, solda de topo ou RTJ e operação manual, pneumática, elétrica ou hidráulica; segmentos forjados de furo pequeno cobrem NPS 3/8 a 2 nas Classes 150 a 2500. As pilhas de foles são hidroformadas com no mínimo duas camadas em 316Ti, liga níquel-molibdênio, liga níquel-cromo ou liga níquel-cobre, montadas em hastes não rotativas com contrassento e prensaestopas API 624 como vedações secundárias. Os limites de função importam tanto quanto as classes: somente aberto total/fechado total (sem estrangulamento), vida de ciclos finita, operação lenta pelo volante, e meios limpos para manter a câmara do fole livre de partículas de desgaste.

Faz parte da Válvulas de Gaveta família

Última atualização: 2026-11

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Especificações da família

Nominal valve connection size	NPS 2" to 30"
Pressure class / nominal rating designation	ASME Class 150 to 1500 (PN16 to PN260)
Valve body material	Carbon Steel, Low Temperature Carbon Steel, Martensitic Stainless Steel, Low Alloy Steel, Austenitic Stainless Steel, Duplex, Super Duplex, Nickel Alloy Steel
End connection types	SW – ASME B16.11, NPT – ASME B1.20.1, BW – ASME B16.25, FLANGED – ASME B16.5, FLANGED – BS EN 1092, COMPACT FLANGE – NORSOK L-005, HUB – According to Customer Request
Operation / closure mode	Manual, Pneumatic, Electric, Hydraulic
Design standards	Design per API 602, ASME B16.34 and MSS SP-117, inspection and testing per API 598 and MSS SP-117, fugitive-emission compliance per API 624, ISO 15848 and TA Luft.
Design standards	ASME B16.34, ASME B31.3, ISO 15761, API 602, API 600, MSS SP-117
bellows leak test	Every bellow assembly is helium leak-tested to assure zero leakage; each valve is tested per API 598.
secondary stem seals	Stem backseat plus API 624 stem packing act as secondary stem seals behind the bellow.
stem design	Non-rotating stems prevent torsion of the bellow during stroke.
bellows materials	316Ti, nickel-molybdenum alloy, nickel-chromium alloy, nickel-copper alloy
bellows construction	Bellows are hydroformed with a minimum of two layers (plies).
packing standard	High-quality packing per API 622 for low-emission performance compliant with API 624; seal-welded bellows isolate the packing from process media.
small bore segment	Forged small-bore bellow-sealed segment: NPS 3/8 to 2 (DN10-DN50), ASME Class 150 to 2500.
dual seal redundancy	Bellows and packing form a dual sealing structure: the bellows is the primary stem seal and the packing backs it up, so a bellows failure does not become an immediate leak path.
gate duty limit	Bellow-seal gate valves are for full opening and closing only; adjustment and throttling are not permitted.
bellows maintenance	Bellows are critical components and require regular inspection for leaks, damage, or deterioration; replace promptly when found.
duty environment	Particularly suitable for harsh service involving toxic, flammable or explosive media, or high temperature and pressure conditions.
cycle life limit	Avoid exceeding the designed number of opening and closing cycles to prolong the bellows lifespan.
operation care	Operate the handwheel or actuator slowly to avoid damaging the bellows through excessive force or speed.
medium cleanliness	Ensure pipeline cleanliness so impurities do not enter the valve cavity and affect sealing performance.
bellows rupture response	On bellows rupture: cease operation immediately and close the upstream and downstream isolation valves to prevent media leakage.
forged series osy design	features an outside stem and yoke (OS&Y), bolted / welded bonnet and conventional port with either threaded, socketweld or RF ends
forged series design standards	manufactured in accordance with API 602 and ASME B16.34 standards
forged series size range	Sizes 1/2” – 2”
forged series pressure class	Pressure Class 150, 300, 600, 800
forged series compliance program	API 598/602/624, ASME B16.34, NACE MR-0175, NACE MR-0103
forged series end connection options	Threaded, Socketweld, Flanged, Buttweld
forged series bonnet options	Bolted, Welded
forged series style codes b800	B800, B870, B815, B830, B860
forged series style codes bg	BG80, BG87, BG81, BG83, BG86
forged series materials breadth	Large scope of materials and trims available
forged series safety critical duty	suitable for extreme, safety-critical environments like nuclear power generation and petrochemical manufacturing
din3352 series design standard	DIN 3352
din3352 series body materials	ASTM A216 WCB, A351 CF3, CF8, CF8M, CF3M
din3352 series wedge material	ASTM A182 F316Ti
din3352 series size range	1/2-24 Inch, DN15-DN600
din3352 series pressure class	Class 150-600 LB (PN16, PN25, PN40, PN64, PN100)
din3352 series end connections	RF, RTJ, FF
din3352 series flange standard	DIN 2543-2545
din3352 series face to face standard	DIN 3202
din3352 series testing standard	DIN 3230
din3352 series temperature range	-29°C to 550°C
din3352 series certifications	TA-Luft, ISO 15848-1, API 622
din exec design standards	DIN 3356, BS 5160, ASME B16.34
din exec end to end standards	ASME B16.10, EN558-1 / DIN 3202
din exec flange end standards	ASME B16.5, ASME B16.11, ASME B1.20.1, DIN 2543~2545, EN 12627
din exec testing standards	ISO 5208, DIN 3230, MSS SP-117
din exec size range	DN15 through DN400
din exec pressure class	ANSI CL150, CL300, CL600, CL800, CL900, PN16, PN25, PN40, PN64
din exec temperature range	-20C to 350C Degree
din exec seat hardfacing	Hard-facing with Cr. Alloy
cast series materials	Carbon Steel, Stainless Steel, Alloy Steel
cast series size range	NPS 1/2"~ 24", DN 15~600
cast series pressure class	Class 150~2500, PN 10~420
cast series temperature range	-46°C~+538°C
cast series design standards	API 600, API 6D, ASME B16.34, GB/T 12234, GB/T 28776, JB/T 7746
cast series face to face standards	ASME B16.10, GB/T 12221, EN 558
cast series flange standards	ASME B16.5, ASME B16.47, GB/T 9113, JB/T 79, HG/T 20592, EN 1092, GOST 33259
cast series testing standards	API 598, API 6D, GB/T 13927, JB/T 9092, GOST 9544
size range asme	ASME Class 150 Lbs to 1500 Lbs – 1/4″ to 6″
size range pn	BS EN 1092 Class PN 2.5 bar to PN 250 bar – 3/8″ to 6″
end to end standard	ASME B16.10 Short and Long Pattern, BS EN 558
bonnet connection	Bolted Bonnet, Welded Bonnet
seat type	Renewable Press Fit or Threaded
obturator type	Solid Wedge, Flexible Wedge, Split Wedge
stem packing	Bellow Seal + Graphite, PTFE
operator type	Manual : Handwheel or Gearbox, Actuated: Electric, Pneumatic, Hydraulic
Testing procedures and requirements	Hydrostatic, High Pressure Gas, Pneumatic and Functional, ISO 5208 – API 598 – API 6A – API 6D, Cryogenic and Low Temperature Test: BS 6364 – ISO 28921, Fugitive Emission Test: ISO 15848, Fire Safe: ISO 10497
stem type	Outside Screw & Yoke, Rising Stem, Rotating Stem, Non Rotating Stem, Anti Blow Out
back seat type	Integral
seat seal	Metal, Soft
body bonnet gasket	Metal: Spiral Wound, Ring Joint
additional features	Locking Device, Position Indicator, Stem Protection, Packing Complete with Lantern Ring and Grease Injector, Packing Vacuum Service, Loaded Spring Packing, Extended Bonnet, Collar Drip Plate, Insulation, Extended Stem, Quill, Nipples, Gusset, Jacket and Semi Jacket, Bare Stem complete with actuator flange, Operator Antitamper, Equalizing hole in Gate
vent drain	Plugged, Flanged, With Valve, Any type of connection upon request
Certifications	PED 2014/68/EU Mod. H, ATEX 2014/34/EU
end to end class800 bolted or welded	NPS 1/2: 76 mm \| NPS 3/4: 86 mm \| NPS 1: 102 mm \| NPS 1-1/4: 118 mm \| NPS 1-1/2: 118 mm \| NPS 2: 132 mm (end-to-end length, Class 800 bolted or welded bonnet, regular port size, full port one size smaller, threaded and socket weld ends, ASME B16.34/API 602)
bore diameter class800 bolted or welded	NPS 1/2: 9.5 mm \| NPS 3/4: 12.7 mm \| NPS 1: 17.5 mm \| NPS 1-1/4: 23.8 mm \| NPS 1-1/2: 28.6 mm \| NPS 2: 36.5 mm (bore diameter, Class 800 bolted or welded bonnet, regular port size, full port one size smaller, threaded and socket weld ends, ASME B16.34/API 602)
center to top open class800 bolted or welded bolted	NPS 1/2: 329.2 mm \| NPS 3/4: 353.7 mm \| NPS 1: 425.5 mm \| NPS 1-1/4: 577.4 mm \| NPS 1-1/2: 577.4 mm \| NPS 2: 712.1 mm (center-to-top (open) height, bolted bonnet, Class 800 bolted or welded bonnet, regular port size, full port one size smaller, threaded and socket weld ends, ASME B16.34/API 602)
center to top open class800 bolted or welded welded	NPS 1/2: 289.2 mm \| NPS 3/4: 319.8 mm \| NPS 1: 372.7 mm \| NPS 1-1/4: 533.3 mm \| NPS 1-1/2: 533.3 mm \| NPS 2: 700 mm (center-to-top (open) height, welded bonnet, Class 800 bolted or welded bonnet, regular port size, full port one size smaller, threaded and socket weld ends, ASME B16.34/API 602)
handwheel class800 bolted or welded	NPS 1/2: 90 mm \| NPS 3/4: 90 mm \| NPS 1: 110 mm \| NPS 1-1/4: 150 mm \| NPS 1-1/2: 150 mm \| NPS 2: 150 mm (handwheel diameter (W), Class 800 bolted or welded bonnet, regular port size, full port one size smaller, threaded and socket weld ends, ASME B16.34/API 602)
weight class800 bolted or welded	NPS 1/2: 3.5 kg \| NPS 3/4: 4.0 kg \| NPS 1: 5.5 kg \| NPS 1-1/4: 8.5 kg \| NPS 1-1/2: 8.5 kg \| NPS 2: 16 kg (approx weight, Class 800 bolted or welded bonnet, regular port size, full port one size smaller, threaded and socket weld ends, ASME B16.34/API 602)
end to end class900 1500 welded	NPS 1/2: 90 mm \| NPS 3/4: 104 mm \| NPS 1: 120 mm \| NPS 1-1/4: 130 mm \| NPS 1-1/2: 130 mm \| NPS 2: 150 mm (end-to-end length, Class 900/1500 welded bonnet, regular port size, full port one size smaller, threaded and socket weld ends, ASME B16.34/API 602)
bore diameter class900 1500 welded	NPS 1/2: 9.5 mm \| NPS 3/4: 12.7 mm \| NPS 1: 16 mm \| NPS 1-1/4: 22.5 mm \| NPS 1-1/2: 27 mm \| NPS 2: 35 mm (bore diameter, Class 900/1500 welded bonnet, regular port size, full port one size smaller, threaded and socket weld ends, ASME B16.34/API 602)
center to top open class900 1500 welded	NPS 1/2: 300 mm \| NPS 3/4: 320 mm \| NPS 1: 380 mm \| NPS 1-1/4: 530 mm \| NPS 1-1/2: 530 mm \| NPS 2: 580 mm (center-to-top (open) height, Class 900/1500 welded bonnet, regular port size, full port one size smaller, threaded and socket weld ends, ASME B16.34/API 602)
handwheel class900 1500 welded	NPS 1/2: 90 mm \| NPS 3/4: 110 mm \| NPS 1: 150 mm \| NPS 1-1/4: 150 mm \| NPS 1-1/2: 150 mm \| NPS 2: 180 mm (handwheel diameter (W), Class 900/1500 welded bonnet, regular port size, full port one size smaller, threaded and socket weld ends, ASME B16.34/API 602)
weight class900 1500 welded	NPS 1/2: 5 kg \| NPS 3/4: 7.5 kg \| NPS 1: 11.5 kg \| NPS 1-1/4: 19 kg \| NPS 1-1/2: 19 kg \| NPS 2: 30 kg (approx weight, Class 900/1500 welded bonnet, regular port size, full port one size smaller, threaded and socket weld ends, ASME B16.34/API 602)
end to end class150 flanged	NPS 1/2: 108 mm \| NPS 3/4: 117 mm \| NPS 1: 127 mm \| NPS 1-1/2: 165 mm \| NPS 2: 178 mm (end-to-end length, Class 150 Class 150-300-600 overall-end flange, bolted bonnet, regular port, structure length ASME B16.10, flange ASME B16.5)
end to end class300 flanged	NPS 1/2: 140 mm \| NPS 3/4: 152 mm \| NPS 1: 165 mm \| NPS 1-1/2: 190 mm \| NPS 2: 216 mm (end-to-end length, Class 300 Class 150-300-600 overall-end flange, bolted bonnet, regular port, structure length ASME B16.10, flange ASME B16.5)
end to end class600 flanged	NPS 1/2: 165 mm \| NPS 3/4: 190 mm \| NPS 1: 216 mm \| NPS 1-1/2: 241 mm \| NPS 2: 292 mm (end-to-end length, Class 600 Class 150-300-600 overall-end flange, bolted bonnet, regular port, structure length ASME B16.10, flange ASME B16.5)
bore diameter class150 300 600 flanged	NPS 1/2: 9.5 mm \| NPS 3/4: 12.7 mm \| NPS 1: 17.5 mm \| NPS 1-1/2: 28.6 mm \| NPS 2: 36.5 mm (bore diameter, Class 150-300-600 overall-end flange, bolted bonnet, regular port, structure length ASME B16.10, flange ASME B16.5)
center to top open class150 300 600 flanged	NPS 1/2: 145.5 mm \| NPS 3/4: 151.8 mm \| NPS 1: 179.7 mm \| NPS 1-1/2: 247 mm \| NPS 2: 268.7 mm (center-to-top (open) height, Class 150-300-600 overall-end flange, bolted bonnet, regular port, structure length ASME B16.10, flange ASME B16.5)
handwheel class150 300 600 flanged	NPS 1/2: 90 mm \| NPS 3/4: 90 mm \| NPS 1: 110 mm \| NPS 1-1/2: 150 mm \| NPS 2: 150 mm (handwheel diameter (W), Class 150-300-600 overall-end flange, bolted bonnet, regular port, structure length ASME B16.10, flange ASME B16.5)
weight class150 flanged	NPS 1/2: 3 kg \| NPS 3/4: 3.8 kg \| NPS 1: 4.8 kg \| NPS 1-1/2: 10 kg \| NPS 2: 15 kg (approx weight, Class 150 Class 150-300-600 overall-end flange, bolted bonnet, regular port, structure length ASME B16.10, flange ASME B16.5)
weight class300 flanged	NPS 1/2: 3.4 kg \| NPS 3/4: 4.5 kg \| NPS 1: 5.7 kg \| NPS 1-1/2: 11.5 kg \| NPS 2: 17 kg (approx weight, Class 300 Class 150-300-600 overall-end flange, bolted bonnet, regular port, structure length ASME B16.10, flange ASME B16.5)
weight class600 flanged	NPS 1/2: 4 kg \| NPS 3/4: 5.2 kg \| NPS 1: 6.6 kg \| NPS 1-1/2: 12.7 kg \| NPS 2: 18 kg (approx weight, Class 600 Class 150-300-600 overall-end flange, bolted bonnet, regular port, structure length ASME B16.10, flange ASME B16.5)

Encomenda e documentação

Documentos

Solicite com o pedido o conjunto documental de que precisa — os itens habituais para esta execução (certificados de material, relatórios de ensaio segundo a norma de inspeção indicada, desenhos dimensionais) são confirmados e fornecidos com a cotação.

Cotação

Um pedido pronto para cotação indica: dimensão nominal e classe de pressão, preferência de materiais do corpo e da sede, ligação terminal, acionamento, e o fluido de serviço com a sua temperatura. Os valores típicos nesta página são gamas de referência; os valores vinculativos são confirmados na cotação.

Amostra e fornecimento

As condições de fornecimento, quantidades encomendadas e prazos são acordados por encomenda — indique o país de destino e o calendário requerido com o pedido.

Armazenamento e expedição

Armazene as válvulas com sedes e vedantes protegidos de UV, ozono e deformação, mantenha as proteções das faces de junção até à instalação e, nas execuções com sede em elastómero ou PTFE, evite o armazenamento prolongado ao ar livre — os compostos das sedes envelhecem mais depressa à luz solar direta e em condições de congelamento.

Perguntas frequentes

O que uma solicitação de cotação para válvulas de gaveta com selo de fole deve incluir?

A norma e a classe aplicáveis, o tamanho nominal, os materiais do corpo e do assento, o meio de serviço com temperatura e o destino — o que estiver faltando é confirmado durante a cotação.

Que tamanho e classe de pressão estão disponíveis em válvulas de gaveta com selo de fole?

Uma faixa de tamanho e classe de pressão verificada para esta válvula ainda não está publicada nesta página — o tamanho e classe de pressão aplicável à sua aplicação é proposto e confirmado durante a cotação. Envie as condições de serviço com a consulta; a seleção é indicada na proposta.

Que material do corpo estão disponíveis em válvulas de gaveta com selo de fole?

Uma faixa de material do corpo verificada para esta válvula ainda não está publicada nesta página — o material do corpo aplicável à sua aplicação é proposto e confirmado durante a cotação. Envie as condições de serviço com a consulta; a seleção é indicada na proposta.