Name

FULL-BORE BI-DIRECTIONAL · PN10–PN320 · DN25 DN1000

The GB/T 12234 Flanged Gate Valve is a full-bore, bi
directional shutoff valve designed for isolation service in
industrial pipeline systems. Manufactured to GB/T 12234
standards, it delivers minimal flow resistance in the fully open
position, making it the preferred choice for on/off
applications in water, steam, oil, and gas pipelines across a
wide pressure range from PN10 to PN320.

GB/T 12234
NamePN10 / PN16 / PN25 / PN40 / PN64 /
PN100 / PN160 / PN320
Khoảng cỡDN25 – DN1000
Vật liệu cơ thểWCB / WC6 / WC9 / CF8 / CF8M / CF3M
NameBolted / Pressure Seal Bonnet
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GB/T 12234 Flanged Gate Valve - Parameter Table

ParisMỘT SỐ HỌC
ChuẩnGB/T 12234
NamePN10 / PN16 / PN25 / PN40 / PN64 / PN100 / PN160 / PN320
Khoảng cỡDN25 – DN1000
Vật liệu cơ thểWCB / WC6 / WC9 / CF8 (304SS) / CF8M (316SS) / CF3M
Nguyên liệu câyWCB+STL / CF8 / CF8M
Nguyên liệu ghế ngồiWCB+STL / 410, C78, C78M
Nguyên liệu gốc2Cr13 / SS316 / SS304 , 17-4PH, XM-19
Kết nốiFlanged – GB/T 9113 / RF / FF / RJ Face
NameBolted Bonnet / Pressure Seal Bonnet (High Pressure)
Thao tácName
NameSolid Wedge / Flexible Wedge / Double Disc Parallel Gate
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 12234 Flanged Gate Valve

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Wedge & Seating Design

Available in solid wedge, flexible wedge, and double disc parallel configurations, the gate valve adapts to diverse pipeline conditions. Stellite-overlaid seats and wedge faces provide superior hardness (HRC 38–45) and erosion resistance, ensuring long-term sealing integrity under high pressure, high-temperature service up to 425°C. PTFE-seated variants are available for lower temperature corrosive applications

Pressure Seal Bonnet for High-Pressure Service

For high-pressure classes (PN160 / PN320), a pressure seal bonnet design is available, where internal pressure energizes the bonnet seal, providing enhanced leak-tightness under extreme operating conditions. This design is widely specified in power generation, refinery, and high-pressure steam pipeline projects.

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GB/T 12234 Flanged Gate Valve · Direct from 50,000m² Factory · Wenzhou, China