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SWING & LIFT TYPE · PN10–PN320 · BACKFLOW PROTECTION

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
NamePN10 / PN16 / PN25 / PN40 / PN64 /
PN100 / PN160 / PN320
Khoảng cỡDN25 – DN1000
Vật liệu cơ thểWCB · CF8 · CF8M · WC6 · WC9
NameSwing Check / Lift Check
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GB/T 12236 Flanged Check Valve - Parameter Table

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ChuẩnGB/T 12236
NamePN10 / PN16 / PN25 / PN40 / PN64 / PN100 / PN160 / PN320
Khoảng cỡDN25 – DN1000
Vật liệu cơ thểWCB / CF8 (304SS) / CF8M (316SS) / WC6 / WC9
Nguyên liệu đĩaWCB+STL / CF8 / CF8M
Kết nốiFlanged – GB/T 9113 / RF / FF Face
NameSwing Check Valve / Lift Check Valve
Cài đặtHorizontal / Vertical (Upward Flow) – Type Dependent
Áp lực phá vỡ≤ 0.03 MPa (Swing Type)
Lớp nghỉGB/T 26480 Class A / API 598
ChuẩnGB/T 26480 / API 598 (100% Factory Pressure Test)
Phạm vi nhiệt độ-29°C ~ +425°C (Material Dependent)
Phương tiện thích hợpWater / Steam / Oil / Gas / Non-Corrosive Media

Our Production Process

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1. Casting

2. Machining

3. Testing

4. Loading

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Single-page datasheet for GB/T 12236 Flanged Check Valve.

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Swing Check vs Lift Check Design

The swing check valve features a hinged disc that opens under 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 piston guided disc for faster response and tighter shutoff, recommended for high-pressure, high-velocity steam and liquid service applications.

Stellite-Hardened Seating Surfaces

Stellite overlay on disc and seat contact faces provides superior hardness (HRC 38–45) and resistance to wire drawing erosion caused by high-velocity fluid impingement. This ensures long-term sealing integrity and extended maintenance intervals in demanding steam, oil, and gas pipeline environments.

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GB/T 12236 Flanged Check Valve · Direct from 50,000m² Factory · Wenzhou, China