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SWING & LIFT TYPE · PN10–PN320 · BACKFLOWPROTECTION
The GB/T 12236 Flanged Check Valve is an automatic non
return valve that prevents reverse flow in pipeline systems,
protecting pumps, compressors, and other upstream
equipment from backflow damage. Manufactured to GB/T
12236 standards, it is available in swing check and lift check
configurations to suit horizontal and vertical pipeline
installations across a pressure range from PN10 to PN320.
| GB/T 12236 | |
|---|---|
| Name | PN10 / PN16 / PN25 / PN40 / PN64 / PN100 / PN160 / PN320 |
| Khoảng cỡ | DN25 – DN1000 |
| Vật liệu cơ thể | WCB · CF8 · CF8M · WC6 · WC9 |
| Name | Swing Check / Lift Check |
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— Chi tiết đầy đủ
GB/T 12236 Flanged Check Valve - Parameter Table
| Paris | MỘT SỐ HỌC |
|---|---|
| Chuẩn | GB/T 12236 |
| Name | PN10 / PN16 / PN25 / PN40 / PN64 / PN100 / PN160 / PN320 |
| Khoảng cỡ | DN25 – DN1000 |
| Vật liệu cơ thể | WCB / CF8 (304SS) / CF8M (316SS) / WC6 / WC9 |
| Nguyên liệu đĩa | WCB+STL / CF8 / CF8M |
| Kết nối | Flanged – GB/T 9113 / RF / FF Face |
| Name | Swing Check Valve / Lift Check Valve |
| Cài đặt | Horizontal / Vertical (Upward Flow) – Type Dependent |
| Áp lực phá vỡ | ≤ 0.03 MPa (Swing Type) |
| Lớp nghỉ | GB/T 26480 Class A / API 598 |
| Chuẩn | GB/T 26480 / API 598 (100% Kiểm tra áp suất nhà máy) |
| Phạm vi nhiệt độ | -29°C ~ + 425°C (phụ thuộc trên máy bay) |
| Phương tiện thích hợp | Water / Steam / Oil / Gas / Non-Corrosive Media |
Tiến trình sản xuất
1, ném
2. Machining
3 Thử ra
Nạp 4.
Điều kiện truy cập nhanh
— TẠI SAO BAUTU
Tại sao được chỉ định Name
Swing Check vs Lift Check Design
The swing check valve features a hinged disc that opensunder forward flow and closes by gravity and backpressure,offering low pressure drop and suitability for large diameter,low-velocity pipelines. The lift check valve uses a pistonguided disc for faster response and tighter shutoff,recommended for high-pressure, high-velocity steam andliquid service applications.
Stellite-Hardened Seating Surfaces
Stellite overlay on disc and seat contact faces providessuperior hardness (HRC 38–45) and resistance to wiredrawing erosion caused by high-velocity fluid impingement.This ensures long-term sealing integrity and extendedmaintenance intervals in demanding steam, oil, and gaspipeline environments.
— FAQ
Những câu hỏi thường xuyên
What is a GB/T 12236 flanged check valve?
GB/T 12236 is the Chinese national standard for flanged check valves used in industrial pipeline systems. Check valves allow media to flow in one direction only, automatically preventing backflow to protect pumps, compressors, and downstream equipment from damage. Bautu manufactures GB/T 12236 flanged check valves in pressure ratings from PN10 to PN320, covering a wide range of industrial applications including water treatment, chemical processing, steam systems, and oil and gas pipelines. Body materials include WCB carbon steel, CF8M stainless steel, and ductile iron.
What is the difference between swing type and lift type check valves?
A swing type check valve uses a hinged disc that swings open with forward flow and closes by gravity when flow stops or reverses. It offers low pressure drop and suits horizontal or vertical pipelines with moderate flow velocities — commonly used in water supply, HVAC, and general process lines. A lift type check valve uses a disc or piston that rises vertically off its seat as flow passes through, then drops back to seal under gravity or spring force. Lift type valves provide tighter shut-off and respond faster to flow reversal, making them ideal for high-pressure steam lines, pump discharge, and vertical upward-flow pipelines. Bautu offers both types; contact our engineers to select the right design for your flow conditions and pipe orientation.
What is the standard lead time, and can Bautu handle custom requirements?
Standard GB/T 12236 flanged check valves are delivered in 3–5 weeks from order confirmation. High-pressure ratings (PN160–PN320) or large diameter sizes typically require 5–8 weeks. Bautu supports custom configurations including Stellite-hardfaced seating surfaces for abrasive or erosive service, special trim materials (316SS, Duplex), spring-assisted closure, and third-party inspection (SGS, BV, TÜV). Submit your pipeline datasheet or project specifications for a detailed quotation within 24 hours.
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