Open Die-Forged Gate Valve （PSB）

Sự miêu tả

Forged Steel Gate Valve Technical Data Sheet

(Free Forging Process / Welded Connection / ASTM A182 F11 Body / Pressure Self-Sealing Bonnet)

Product Name: Forged Steel Pressure Self-Sealing Bonnet Gate Valve (Welded Ends)

1. Product Overview

This valve features a free forging process for the body, ensuring superior grain structure and mechanical properties compared to castings. It is designed with a pressure self-sealing bonnet (pressure seal design) , where the sealing performance increases with internal pressure, making it ideal for high-pressure and high-temperature applications. The body material is ASTM A182 F11 (1.25% Chrome – 0.5% Molybdenum alloy steel) , offering excellent creep resistance and high-temperature strength. Connections are butt-weld ends (BW) per ASME B16.25, providing leak-free piping systems. Designed in accordance with API 602 Và ASME B16.34.

2. General Technical Specifications

3. Material of Parts Specification

4. Pressure Self-Sealing Bonnet (Pressure Seal) Characteristics

• Principle of Operation: The self-sealing bonnet utilizes a sealing gasket (typically stainless steel/graphite laminate or solid metal “pressure seal” ring) . The bonnet is secured by a threaded bonnet ring. When internal pressure is applied, it forces the bonnet upward, compressing the gasket radially against the body bore. The higher the internal pressure, the tighter the seal .
• Advantages for High Pressure:
• Eliminates large, heavy flanges and numerous stud bolts required for high-pressure ratings.
• Provides a positive, leak-proof seal that is self-energizing.
• Reduces weight and envelope size compared to bolted bonnet designs.
• Ideal for cyclic temperature and pressure services.
• Sealing Gasket: Typically flexible graphite laminated with stainless steel for high-temperature resilience and chemical resistance .

5. Main Technical Characteristics

1. Free Forged Body: The forging process refines the grain structure of the A182 F11 alloy, eliminating porosity and providing superior strength and integrity compared to castings. Essential for high-pressure applications .
2. Pressure Self-Sealing Bonnet: As described in Section 4, this design ensures leak-proof operation under extreme pressures. The bonnet is easily removable for maintenance .
3. Welded Connection (BW Ends): Butt-weld ends per ASME B16.25 provide a permanent, leak-free connection to the piping system, eliminating flange gasket maintenance and potential leak paths .
4. A182 F11 Alloy Steel Construction: 1.25% Chrome – 0.5% Molybdenum steel offers excellent resistance to high-temperature creep, oxidation, and corrosion in steam, oil, and gas services up to 550°C .
5. Hard-Faced Seats (Stellite): The wedge and seat sealing surfaces are overlaid with Stellite (Cobalt-based alloy) , ensuring long life in erosive high-velocity services .
6. Rising Stem & OS&Y: Clear visual indication of valve position. Outside screw design prevents thread contact with the line media .
7. Backseat Design: Allows for repacking under pressure when the valve is fully open .
8. API 602 Compliance: Designed to the rigorous requirements of API 602 for forged steel valves, ensuring robust construction and reliable performance .

6. Principal Dimensions & Connection Data (Reference Class 1500 BW)

*Note: Final dimensions subject to approval drawings. Conforms to API 602 / ASME B16.10.*

Note: For Class 2500, dimensions vary. Please consult factory for specific drawings .

7. Applicable Standards & Testing

• Design & Manufacture: API 602 (Steel Gate Valves) / ASME B16.34 / ISO 15761 .
• Vật liệu thân máy: ASTM A182 F11 (Chrome-Moly Alloy Steel) .
• Bonnet Design: Pressure Self-Sealing Type (Pressure Seal) .
• End Connections: ASME B16.25 (Butt-Weld Ends) .
• Đối mặt trực tiếp: ASME B16.10 / API 602 .
• Pressure Tests:
• Shell Test: 1.5 x Rated Pressure at ambient temperature
• High-Pressure Seat Test: 1.1 x Rated Pressure at ambient temperature
• Low-Pressure Pneumatic Test: 0.6 MPa (90 psi)
• Inspection Standard: API 598 / API 6D .

8. Nhận xét

• This valve is specifically designed for High-Pressure Steam, Power Generation, and Critical Hydrocarbon Services.
• Các Pressure Self-Sealing Bonnet combined with A182 F11 Forged Body makes this valve ideal for superheated steam applications up to 550°C .
• Stellite hardfacing on seat and disc ensures long-term reliability in erosive conditions .
• Butt-weld ends eliminate potential flange leakage and reduce maintenance.
• Optional NACE MR0175 / ISO 15156 compliance for sour gas service available upon request.

CAM KẾT:

SAVVY VALVES cam kết cung cấp chất lượng sản phẩm vượt trội và dịch vụ sau bán hàng không phải lo lắng. Van của chúng tôi được đảm bảo cung cấp tuổi thọ tối thiểu là 12 tháng, trong thời gian đó chúng tôi sẽ cung cấp tất cả các phụ tùng thay thế cần thiết và hướng dẫn bảo trì chi tiết miễn phí. Trong thời gian bảo hành, nếu xảy ra bất kỳ hư hỏng nào không phải do con người gây ra, chúng tôi sẽ thay thế các thành phần miễn phí và cung cấp hỗ trợ kỹ thuật chuyên nghiệp. Sau khi hết hạn bảo hành, khách hàng chỉ cần trả chi phí cho các phụ tùng thay thế, trong khi vẫn được hưởng lợi từ các dịch vụ bảo trì giảm giá. Mục tiêu của chúng tôi là giúp khách hàng giảm chi phí vận hành và nâng cao hiệu quả sản xuất thông qua chất lượng đáng tin cậy và hỗ trợ sau bán hàng toàn diện. Cho dù là yêu cầu kỹ thuật hay nhu cầu bảo trì, nhóm chuyên gia của chúng tôi sẽ phản hồi nhanh chóng để đảm bảo hệ thống van của bạn luôn duy trì hiệu suất tối ưu.