شیر دروازهای تخت
قطر اسمی： ۱/۲ اینچ - ۳۶ اینچ (DN15-DN900)
فشار اسمی：Class150-Class2500(1.0MPa-320
MPa）
حداکثر دمای عملیاتی۴۲۵ درجه سانتیگراد
جنس پوسته：M35-1，A105，N10276，WCB，WCC，F304，F316，F316L，N06625，CF8，CF8M，Monel K500，Inconel 718，CF3，CF3M，CW6MC，CY40，
استانداردهای طراحی: API 600, ISO 10434, ASME B16.34, GB/T 12234, EN 10434, DIN 3352, JIS B2032
اتصالفلنج
حالت رانندگی: دستی، برقی، پنوماتیکی، هیدرولیکی
شیر دروازهای تخت
تعریف محصول و ماموریت ایمنی:
Flat gate valves are core equipment for achieving zero-leakage shut-off in modern pipeline systems, overcoming the pain points of traditional gate valves such as sealing failure, high operating torque, and insufficient lifespan in particulate media, high-viscosity fluids, and harsh operating conditions. This high-performance Flat Gate Valve completely eliminates the jamming problem of traditional wedge gate valves in solid particulate media through planar sealing and floating gate technology.
JH Flat Gate Technology Core
- Flat sealing system →Sealing surface flatness ≤ 0.01mm (API 6D)
- Low-friction operation → Operating torque ≤80 Nm (ISO 5211)
- Corrosion protection → Epoxy coating thickness ≥250μm (ISO 12944)
- Ultra-long lifespan → Mechanical life ≥ 60,000 cycles (ISO 5208)
- تحلیل تکنیکال محصول
- قطر اسمی
- Expansion Seal
Flat Gate Valve Product Technical Analysis: This industrial-grade Flat Gate Valve features in-depth innovation in floating sealing and guiding technology. The valve body is made of ASTM A216 WCB cast steel with precision-machined flow channels, ensuring 100% pig throughput. The sealing system, through a combination of a floating gate and a flat sealing pair, automatically compensates for wear within a 1.5mm floating range, maintaining a sealing pressure of ≥8MPa. The high-pressure model employs a mechanical expansion mechanism that generates radial expansion at the moment the gate closes, forming a bidirectional metal seal. The guiding system, through a 6mm deep guide groove and low-friction materials, ensures a service life of 60,000 operations, completely eliminating the risk of jamming.
The full-bore type adopts a full-bore design and a flat sealing structure to ensure that the pig can pass through without obstruction, thus eliminating the flow obstruction caused by traditional valves in pipeline cleaning operations.
طراحی هسته:
▌ Full-bore flow channel → Flow channel diameter deviation ≤ 0.5% (API 6D) | Pig pass rate 100%
▌ Floating gate → Gate floating range ±1.5mm (ASME B16.34) | Automatic compensation for sealing surface wear
▌Guiding System → Guide groove depth ≥ 6mm (API 6D) | Vibration resistance improved by 70%
▌ Self-cleaning function → Sealing surface roughness Ra≤0.4μm (ASME B46.1) | Prevents particulate media embedding
The expansion type achieves bidirectional forced sealing through a mechanical expansion mechanism, overcoming the problem of medium leakage under high pressure conditions and providing absolute sealing protection for high-pressure pipelines.
طراحی هسته:
▌Mechanical expansion mechanism → Expansion range 1.0-1.5mm (API 6D) | Sealing pressure ≥10MPa
▌ Bidirectional sealing → Pressure difference between front and rear seals ≤ 0.1MPa (ISO 5208) | Achieving true bidirectional zero leakage
▌ High-pressure resistant design → Valve body wall thickness ≥28mm (ASME B16.34) | Pressure resistance increased by 150%
▌ Thermal Compensation → Compensation Capability ±0.8mm (API 6D) | Eliminates the Influence of Temperature Stress
طراحی هسته و مزایا
- Zero-jamming floating seal: The Flat Gate Valve uses a floating gate and flat seal → floating range ±1.5mm (API 6D) | Automatically compensates for wear and eliminates jamming of particulate media.
- Unobstructed Full-bore Operation: The full-bore Flat Gate Valve ensures smooth passage of the pig → Flow channel diameter deviation ≤ 0.5% | Eliminates flow obstruction during pigging operations.
- Ultra-smooth operation: Low-friction steering system optimizes operating torque → Torque ≤ 80 Nm (ISO 5211) | Operating force reduced by 50%
- Bidirectional high-pressure sealing: The expansion plate gate valve is equipped with a mechanical expansion mechanism → sealing pressure ≥10MPa | achieving Class 1500 bidirectional zero leakage.
- Long-lasting corrosion resistance: Heavy-duty epoxy coating protects the inside of the valve body → Coating thickness ≥ 250μm | 3 times longer service life due to corrosion resistance
- بدون نیاز به تعمیر و نگهداری مادام العمر: Hardened sealing surface combined with self-lubricating bearings → Design life ≥ 20 years | Maintenance cycle extended by 400%
سایر محصولات
FAQ-Flat Gate Valve
Flat Gate Valves feature a parallel sealing structure design where the gate and seats form planar contact. This unique design allows the valve to achieve uniform sealing force distribution under high pressure conditions. Flat Gate Valves are particularly suitable for oil and natural gas transmission pipelines, as well as media environments containing particulate matter. Their simple structure and easy maintenance make them widely used in industrial applications.
Flat Gate Valves perform excellently in the following working conditions:
Oil and Gas Transmission: Crude oil and natural gas pipeline systems
Particulate Media Handling: Slurry transportation containing solid particles
High Pressure Applications: Pipeline systems requiring high pressure resistance
Long-Distance Pipeline Systems: Remote transmission pipelines requiring reliable sealing
Harsh Working Environments: Working conditions with significant temperature and pressure fluctuations
There are fundamental differences in the sealing mechanisms between Flat Gate Valves and wedge gate valves. Flat Gate Valves use a parallel sealing design, achieving sealing through planar contact between the gate and seats. This structure is particularly suitable for handling media containing solid particles due to its self-cleaning function during operation. In contrast, wedge gate valves rely on the compression of wedge-shaped structures for sealing, which may cause operational difficulties due to thermal expansion under high temperature conditions.
When selecting Flat Gate Valves, the following parameters should be emphasized:
Pressure Rating Requirements: Class 150 to Class 2500
محدوده کاربرد دما: -46°C to +200°C
Media Characteristics Analysis: Particle content, corrosiveness, viscosity
انتخاب جنس بدنه: Carbon steel, stainless steel, alloy steel
Connection Method Determination: Flanged, butt weld, or threaded connections
Operation Method Selection: Manual, gearbox, or actuator
The installation of Flat Gate Valves should pay attention to the following points:
Pipeline Cleanliness: Thoroughly clean the pipeline system before installation
Alignment Accuracy: Ensure precise alignment between valve and pipeline
تأیید جهت جریان: Install according to arrow indication on valve body
سفت کردن پیچ: Use torque wrenches and tighten in specified sequence
Operation Space: Reserve sufficient space for operation and maintenance
Daily maintenance of Flat Gate Valves should include:
تست عملکرد منظمشامل عملکرد آببندی و انعطافپذیری عملیاتی
نگهداری نظافت خارجیتمیز نگه داشتن شیرآلات برای جلوگیری از خوردگی
بازرسی قطعات اتصالبررسی منظم سفتی پیچها
نظارت بر عملکرد آببندی: Regular pressure testing
Operation Record Management: Establish complete maintenance files
Common issues with Flat Gate Valves include:
Sealing Surface Wear: Caused by solid particles in media
افزایش گشتاور عملیاتی: Due to impurity accumulation or insufficient lubrication
نشت ساقه: From packing wear or gland loosening
Gate Sticking: Caused by media crystallization or temperature changes
Our Flat Gate Valves support a complete certification system including CE, ISO 9001, API 6D, ABS (American Bureau of Shipping), BV (Bureau Veritas), CCS (China Classification Society), fire safety certifications, and environmental certifications.