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)
Tamaño nominal: 1.5 inches (DN40)
Clasificación de presión: Class 300 LB
Material del cuerpo: 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.
• Operación: 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 .

GARANTÍA:

SAVVY VALVES se compromete a ofrecer una calidad de producto excepcional y un servicio posventa sin complicaciones. Nuestras válvulas tienen una vida útil mínima garantizada de 12 meses, durante los cuales suministraremos todos los repuestos necesarios e instrucciones detalladas de mantenimiento de forma gratuita. Durante el período de garantía, si se produce algún daño no provocado por el hombre, reemplazaremos los componentes sin coste alguno y ofreceremos soporte técnico profesional. Una vez vencida la garantía, los clientes solo deberán pagar el coste de los repuestos y seguirán beneficiándose de descuentos en los servicios de mantenimiento. Nuestro objetivo es ayudar a los clientes a reducir los costes operativos y mejorar la eficiencia de la producción mediante una calidad fiable y un soporte posventa integral. Ya sea para consultas técnicas o necesidades de mantenimiento, nuestro equipo de expertos responderá con prontitud para garantizar que su sistema de válvulas mantenga un rendimiento óptimo en todo momento.