DN25-PN25-SW Bellows Seal Globe Valve

Technical Data Sheet

Product: Bellows Seal Globe Valve
Size / Rating: DN25 – PN25 – SW (Socket Weld)

1. General Description

This bellows seal globe valve features an advanced double sealing system consisting of a metal bellows and a back‑up packing. It completely eliminates stem leakage, making it the ideal choice for critical applications such as high‑temperature steam, thermal oil, toxic or hazardous fluids, and valuable media. It is a direct upgrade from conventional packed globe valves and is widely used in chemical, power, and pharmaceutical industries where environmental compliance and operational safety are paramount.

2. Basic Specifications

3. Material Specification

4. 주요 특징

4.1 Zero Leakage Bellows Seal

• Double sealing safety – The bellows + packing configuration provides a primary seal (bellows) that eliminates stem leakage, plus a secondary packing seal for added protection.
• Long fatigue life – Bellows are tested for over 10,000 cycles to ensure reliable performance under frequent operation.
• Environmental compliance – Achieves zero stem leakage, meeting ISO 15848 fugitive emission standards and reducing media loss for safer, more environmentally friendly operation.

4.2 Globe Valve Design Advantages

• Flow direction “low in, high out” – Media enters below the disc, ensuring tight shut‑off as system pressure assists sealing.
• Throttling capability – Suitable for both isolation and flow regulation.
• Easy maintenance – Top‑entry design allows internal components to be serviced without removing the valve from the pipeline.

4.3 Socket Weld Connection

• Provides a permanent, leak‑free joint ideal for high‑pressure, high‑temperature, and hazardous media.
• Socket weld design offers high mechanical strength and long service life when properly installed.

5. Testing & Standards

6. Installation & Maintenance Notes

1. Flow direction – Globe valves are directional. Install according to the flow arrow on the body (flow under the disc).
2. Welding precautions – For socket weld connections, fully open the valve before welding to prevent heat damage to the bellows and sealing components. Allow slow cooling after welding.
3. Operating torque – Do not use extensions or excessive force on the handwheel. When closing, turn the handwheel until resistance is felt; for high‑temperature service, re‑tighten slightly after the system reaches operating temperature.
4. Periodic inspection – Although the bellows is designed for long life, regularly inspect the packing area for any signs of leakage as an added safety measure.

7. Approximate Dimensions (for reference)

Note: Final dimensions are subject to the specific design; certified GA drawings should be referenced for engineering purposes.

Remarks:

1. This valve is recommended for steam, thermal oil, toxic, and valuable media. Material selection should be verified based on actual service conditions.
2. For actuated versions (electric or pneumatic), an ISO 5211 top mounting flange is available upon request.

보증:

SAVVY VALVES는 탁월한 제품 품질과 안심할 수 있는 애프터서비스를 제공하기 위해 최선을 다하고 있습니다. 당사 밸브는 최소 12개월의 서비스 수명을 보장하며, 이 기간 동안 필요한 모든 예비 부품과 자세한 유지보수 지침을 무상으로 제공합니다. 보증 기간 내에 인위적인 손상이 아닌 다른 원인으로 인한 손상이 발생할 경우, 무상으로 부품을 교체하고 전문 기술 지원을 제공합니다. 보증 기간이 만료된 후에는 예비 부품 비용만 지불하시면 되며, 할인된 유지보수 서비스 혜택도 누리실 수 있습니다. 당사의 목표는 신뢰할 수 있는 품질과 포괄적인 애프터서비스를 통해 고객의 운영 비용을 절감하고 생산 효율성을 향상시키는 것입니다. 기술 문의나 유지보수가 필요하시면 언제든지 전문가 팀이 신속하게 대응하여 밸브 시스템이 항상 최적의 성능을 유지하도록 보장합니다.