3/4″-800LB-SW Bellows Seal Gate Valve

Technical Data Sheet

Product: Bellows Seal Gate Valve
Model / Size: 3/4″ – 800LB – SW

1. Product Description

This valve adopts a bellows seal design, which fundamentally eliminates stem packing leakage commonly found in conventional gate valves. The bellows assembly, combined with the stem, forms a static seal. An additional packing box serves as a secondary backup seal, achieving a “zero leakage” stem sealing performance. It is suitable for severe service conditions including high temperature, high pressure, high vacuum, and toxic, flammable, or corrosive media.

2. Basic Parameters

3. Standar Desain

4. Bill of Materials (Typical Configuration)

5. Dimensions & Weight (Reference)

6. Operating Conditions

7. Testing & Inspection

• Shell Strength Test: 1.5 times rated pressure, no leakage.
• High-Pressure Seat Test: 1.1 times rated pressure.
• Low-Pressure Pneumatic Test: 0.6 MPa compressed air.
• Bellows Leak Test: Helium mass spectrometry, leakage rate < 1×10⁻⁶ Pa·m³/s (or meeting Class V sealing requirement).
• Operational Test: Valve cycled fully open/close under rated differential pressure.

8. Features & Benefits

1. Zero Leakage Assurance: The bellows isolates the stem from the atmosphere, eliminating external stem leakage – ideal for stringent environmental applications.
2. Long Service Life: High-cycle-life bellows design ensures reliability under frequent operation.
3. Low Maintenance: Dual stem sealing (bellows + packing) provides a secondary seal in the event of bellows failure, ensuring system safety.
4. High Temperature & Pressure Capability: Class 800 rating with socket weld ends is suitable for high-pressure steam and thermal oil systems.

Notes:

1. Dimensions and weights are typical values based on API 602; actual values may vary slightly depending on manufacturer design (e.g., handwheel size, bonnet height).
2. For NACE MR0175 (sour service) compliance, please specify when ordering.
3. During installation, follow the approved Welding Procedure Specification (WPS) for socket weld connections to avoid welding stress that could affect bellows life.

JAMINAN:

SAVVY VALVES berkomitmen untuk memberikan kualitas produk yang luar biasa dan layanan purnajual yang bebas masalah. Katup kami dijamin memberikan masa pakai minimal 12 bulan, di mana kami akan menyediakan semua suku cadang yang diperlukan dan petunjuk perawatan terperinci secara gratis. Dalam masa garansi, jika terjadi kerusakan yang bukan disebabkan oleh manusia, kami akan mengganti komponen tanpa biaya dan memberikan dukungan teknis yang profesional. Setelah masa garansi berakhir, pelanggan hanya perlu membayar biaya suku cadang, sambil tetap mendapatkan keuntungan dari layanan perawatan dengan harga diskon. Tujuan kami adalah membantu klien mengurangi biaya operasional dan meningkatkan efisiensi produksi melalui kualitas yang andal dan dukungan purnajual yang komprehensif. Baik untuk pertanyaan teknis maupun kebutuhan perawatan, tim ahli kami akan segera merespons untuk memastikan sistem katup Anda mempertahankan kinerja yang optimal setiap saat.