FREE · No sign-up · Instant download
GB/T 12234 Flanged Gate Valve
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 | |
|---|---|
| Pressure Rating | PN10 / PN16 / PN25 / PN40 / PN64 / PN100 / PN160 / PN320 |
| Size Range | DN25 – DN1000 |
| Body Material | WCB / WC6 / WC9 / CF8 / CF8M / CF3M |
| Bonnet Type | Bolted / Pressure Seal Bonnet |
Sales team responds within 24 hours
— Full Specifications
GB/T 12234 Flanged Gate Valve - Parameter Table
| PARAMETER | SPECIFICATION |
|---|---|
| Standard | GB/T 12234 |
| Pressure Rating | PN10 / PN16 / PN25 / PN40 / PN64 / PN100 / PN160 / PN320 |
| Size Range | DN25 – DN1000 |
| Body Material | WCB / WC6 / WC9 / CF8 (304SS) / CF8M (316SS) / CF3M |
| Wedge Material | WCB+STL / CF8 / CF8M |
| Seat Material | WCB+STL / 410, C78, C78M |
| Stem Material | 2Cr13 / SS316 / SS304 , 17-4PH, XM-19 |
| End Connection | Flanged – GB/T 9113 / RF / FF / RJ Face |
| Bonnet Type | Bolted Bonnet / Pressure Seal Bonnet (High Pressure) |
| Operation | Handwheel / Gear Operated / Electric / Pneumatic Actuator |
| Valve Type | Solid Wedge / Flexible Wedge / Double Disc Parallel Gate |
| Leakage Class | GB/T 26480 Class A / API 598 |
| Test Standard | GB/T 26480 / API 598 (100% Factory Pressure Test) |
| Temperature Range | -29°C ~ +425°C (Material Dependent) |
| Applicable Media | Water / Steam / Oil / Gas / Non-Corrosive Media |
Our Production Process
1. Casting
2. Machining
3. Testing
4. Loading
Inquiry Form - Quick Access
· Product documentation
Download Bautu Valve Documentation
Free · Instant
This Product Spec Sheet
Single-page datasheet for GB/T 12234 Flanged Gate Valve
- Full parameter table
- Dimensional drawing
- Materials & standards list
- Ordering code guide
Full Catalog
Complete Product Catalog
— WHY bAUTU
Why Specify This Valve from Bautu
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.
— FAQ
Frequently Asked Questions
What is a GB/T 12234 flanged gate valve, and where is it used?
GB/T 12234 is China's national standard for bolted-bonnet flanged gate valves used in industrial pipeline systems. Gate valves provide full-bore isolation with unrestricted flow when fully open and tight shut-off when closed — they are not designed for throttling. GB/T 12234 gate valves are widely specified in water treatment plants, heating networks, chemical pipelines, power stations, and municipal infrastructure projects across China and international markets that accept Chinese national standards. Bautu manufactures these valves in sizes from DN25 to DN1000 and pressure ratings from PN10 to PN320.
What does the PN pressure rating range mean, and how do I choose the right one?
PN (Pressure Nominale) is the European/Chinese nominal pressure rating system. As a general guide: PN10 equals 10 bar (145 psi) — suitable for low-pressure water and utility lines; PN16 equals 16 bar (232 psi) — the most common rating for general industrial pipelines; PN25 and PN40 cover medium-high pressure process lines up to 25–40 bar; PN63 to PN160 suit high-pressure steam and chemical service; PN250 to PN320 are specified for extreme-pressure applications in refineries and power plants. Always select based on your pipeline's maximum operating pressure plus a safety margin, and verify against the pressure-temperature rating table for your body material. Bautu's engineers can assist with rating selection from your process datasheet.
What sizes and lead times are available, and what custom options does Bautu offer?
Bautu manufactures GB/T 12234 gate valves from DN25 to DN1000 across the full PN10–PN320 pressure range. Standard sizes (PN10–PN40, DN25–DN400) are delivered in 4–6 weeks; large bore sizes (DN500–DN1000) or high-pressure ratings (PN160–PN320) typically require 8–12 weeks. Custom configurations include WCB, LCB, CF8M, and duplex stainless steel body materials, rising or non-rising stem designs, electric or pneumatic actuator packages, and full third-party inspection (SGS, BV, TÜV). Submit your valve datasheet or project specification for a tailored quotation within 24 hours.
— Get In touch
Need Quote for This Valve?
Tell us size, quantity, material and required standard — sales team responds within 24 hours.