1-1/2″ – 300LB Cryogenic Bellows Seal Gate Valve SAVVY

1-1/2″ – 300LB Cryogenic Bellows Seal Gate Valve

Technical Datasheet: Cryogenic Bellows Seal Gate Valve

Product Name: Cryogenic Bellows Seal Gate Valve
Connection: Flanged Ends (ASME B16.5)
Tamanho nominal: 1.5 inches (DN40)
Classificação de pressão: Class 300 LB
Material do corpo: Stainless Steel (CF8 / CF8M / CF3M)

1. General Design Features

• Tipo: Bellows-sealed gate valve, specifically designed for cryogenic services.
• Service Temperature: Designed for cryogenic applications down to -196°C (-320°F) (LNG, Liquid Nitrogen, Liquid Oxygen) .
• Seal Design: Zero-leakage to atmosphere via a primary welded metal bellows. A secondary graphite packing provides backup sealing.
• Bonnet Design: Extended bonnet construction to ensure the stem packing and bellows assembly remain above 0°C, preventing ice formation and seal failure .
• Cryogenic Treatment: All pressure-containing parts are subjected to deep cryogenic treatmentat -196°C to ensure dimensional stability and prevent austenite transformation .
• Back Seat: Integral back seat allows for repacking under pressure (if bellows fails) and protects the packing from direct media flow.
• Operação: Rising stem with non-rising handwheel for visual position indication.

2. Applicable Standards & Specifications

3. Operating Parameters

4. Bill of Materials (Stainless Steel Cryogenic Design)

Note: Materials are selected to meet BS 6364 cryogenic requirements .

5. Dimensional Data (1.5″ – Class 300 LB)

Note: The extended bonnet length (H) is critical for cryogenic service to maintain the packing box temperature above 0°C.

6. Special Requirements for Cryogenic Service (Per BS 6364)

6.1 Deep Cryogenic Treatment

All stainless steel pressure parts shall be thermally cycled to -196°C to stabilize the austenitic structure and prevent dimensional changes during operation .

6.2 Extended Bonnet (Cold Box Design)

The bonnet length must be sufficient to ensure the temperature at the stuffing box is maintained above 0°C to prevent ice formation on the stem and bellows .

6.3 Stellite Hardfacing

Seat and wedge surfaces must be overlaid with Stellite (Cobalt-Chromium alloy) to prevent galling and seizure at cryogenic temperatures .

6.4 Cleanliness & Degreasing

Valves for oxygen service (LO₂) require oxygen cleaning to remove all hydrocarbons and prevent combustion risks.

7. Inspection & Testing Procedure (Per BS 6364)

8. Features & Benefits

• Zero Fugitive Emissions: Welded metal bellows eliminates stem leakage, critical for volatile cryogenic fluids.
• BS 6364 Certified: Full compliance with international cryogenic valve standard .
• No Icing: Extended bonnet prevents ice formation on stem seals .
• Long Cycle Life: Bellows design handles thermal cycling without failure.
• Stellite Protection: Prevents galling of stainless steel at cryogenic temperatures .

GARANTIA:

A SAVVY VALVES está comprometida em oferecer produtos de qualidade excepcional e um serviço pós-venda sem preocupações. Nossas válvulas têm garantia de vida útil mínima de 12 meses, durante a qual forneceremos gratuitamente todas as peças de reposição necessárias e instruções detalhadas de manutenção. Dentro do período de garantia, caso ocorra algum dano não causado por intervenção humana, substituiremos os componentes gratuitamente e forneceremos suporte técnico profissional. Após o término da garantia, os clientes pagam apenas o custo das peças de reposição, continuando a se beneficiar de serviços de manutenção com desconto. Nosso objetivo é ajudar os clientes a reduzir custos operacionais e aumentar a eficiência da produção por meio de qualidade confiável e suporte pós-venda abrangente. Seja para consultas técnicas ou necessidades de manutenção, nossa equipe de especialistas responderá prontamente para garantir que seu sistema de válvulas mantenha o desempenho ideal o tempo todo.