Metal-seated wedge gate valve · Chinese standard · Made in Wenzhou
GB/T 12234 Flanged Gate Valve — Stainless Steel, Handwheel
Flanged wedge gate valve with a rising stem and handwheel, for on/off isolation of water, oil and gas. Body, bonnet and wedge in WCB carbon steel or cast stainless steel CF8 / CF3M, metal-to-metal seating, graphite packing.
- Body, bonnet and wedge cast in our own foundry
- Every valve shell and seat tested, test report in every shipment
- Standard sizes ship in 15–20 days
An engineer replies within 24 hours. Send size, PN, material and quantity. Download GA drawing (PDF) →
Specifications
Technical Data
| Design | GB/T 12234 |
| Type | Wedge gate valve, rising stem, bolted bonnet |
| Size range | DN25–DN500 |
| Pressure rating | PN16 |
| Body, bonnet, wedge | A216 WCB · A351 CF8 (304) · A351 CF3M (316L) |
| Seating | Metal-to-metal |
| Stem | A182 F304 / F316, rising |
| Packing | Graphite |
| Bonnet gasket | Stainless steel + graphite |
| Temperature | −29 °C to +150 °C |
| Media | Water, oil and gas |
| Ends | Flanged, raised face |
| Operation | Handwheel (QT400 ductile iron) |
Application
Where It Is Used
For lines that run fully open or fully closed, where a full bore and low pressure drop matter.
- Water supply and treatment
- Oil and fuel lines
- Gas lines
- Chemical lines (CF3M body)
- Non-corrosive water, oil and gas lines (WCB body)
- Projects and plants designed to GB standards
ASSEMBLY HALL · WENZHOUConstruction
Parts & Materials
From our Z40H-DN50-PN16 general assembly drawing. Stainless steel version shown; WCB carbon steel bodies are also available, with the trim confirmed on your quotation. Every body casting is marked with size, rating and material.
| Part | CF8 valve | CF3M valve |
|---|---|---|
| Body | A351 CF8 | A351 CF3M |
| Wedge | A351 CF8 | A351 CF3M |
| Bonnet | A351 CF8 | A351 CF3M |
| Stem | A182 F304 | A182 F316 |
| Stem nut | A182 F304 | A182 F316 |
| Bearing cover | A182 F304 | A182 F316 |
| Bonnet gasket | SS304 + graphite | SS316L + graphite |
| Stem packing | Braided graphite rings top and bottom, flexible graphite in between | Same |
| Gland | A351 CF8 | A351 CF3M |
| Gland eye bolts / nuts | A193 B8 / A194 8 | A193 B8 / A194 8 |
| Bonnet studs / nuts | A193 B8 / A194 8 | A193 B8 / A194 8 |
| Handwheel | QT400 ductile iron | QT400 ductile iron |
| Handwheel lock nut | A29 1025 | A29 1025 |
| Grease nipple | Brass | Brass |
Dimensions
Dimensions (mm)
| DN | PN | L | D | D2 | Bore | T | f | H | W |
|---|---|---|---|---|---|---|---|---|---|
| 50 | 16 | 250 | 165 | 102 | 50 | 18 | 2 | 292.1 | Ø196 |
From our Z40H-DN50-PN16 general assembly drawing. L = face-to-face · D = flange O.D. · D2 = raised face O.D. · T = flange thickness · f = raised face height · H = height · W = handwheel diameter. Sizes: DN25, 32, 40, 50, 65, 80, 100, 125, 150, 200, 250, 300, 350, 400, 450 and 500, all PN16. The drawing for your size is sent with your quotation.
ASSEMBLY BENCHChecked before packing
Face-to-face and flange dimensions are checked against the drawing before packing. Each valve gets a QC tag with model, size, rating and inspector.
Pressure rating
Pressure Rating
| Rating | Nominal pressure (MPa) |
|---|---|
| PN16 | 1.6 |
Nominal pressure at room temperature. Working temperature −29 °C to +150 °C per our drawing.
Testing
Pressure Test on Every Valve
| Test | Pressure |
|---|---|
| Shell test (water), PN16 | 2.24 MPa |
| Seat test (water), PN16 | 1.76 MPa |
| Seat test (air) | 0.6 MPa |
Test pressures from our Z40H-DN50-PN16 drawing; actual values for each valve are on the test report.
HYDRAULIC TEST BENCHQuality records
A Product Test Report in Every Shipment
- Heat number of the body casting
- Chemical composition against ASTM limits
- Mechanical properties: tensile, yield, elongation
- Shell and seat test pressure and hold time
- Signed and stamped by our QC department
We welcome third-party inspection (e.g. SGS or BV), arranged and paid for by the buyer; inspectors get full access to our plant and test bench.
Download Sample EN 10204 3.1 Report (PDF)How to order
Model Code Z41W-16
Order code by size, e.g. Z41W-16-DN100. We confirm the full code and body material on the order confirmation.
Send us these 7 details for a fast quote
- Size (DN25–DN500)
- Pressure rating (PN)
- Body material (WCB / CF8 / CF3M)
- Media and temperature
- Quantity
- Marking or nameplate needs
- Destination port
Made by BAUTU
From Casting to Crate
01 CASTING
02 MACHINING
03 ASSEMBLY
04 PRESSURE TESTSee the valve before you order
Real footage from our gate valve line. Want to see your own order? Book a live video call and we show your valves on the test bench.
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CRATED AT OUR PLANTPacking & delivery
Packed for Sea Freight
- Flange faces capped to protect the sealing face
- Each valve bagged; the order packed in plywood cases
- Product test report inside every case
- Standard sizes ship in 15–20 days
FAQ
Frequently Asked Questions
Can I use a gate valve to regulate flow?
No. A gate valve is made to run fully open or fully closed. Half open, the flow wears the wedge and seats and the valve vibrates. For throttling, use a globe valve such as our GB/T 12235 globe valve.
What does metal-seated mean on a gate valve?
The wedge seals directly against stainless steel seating faces in the body, with no soft insert. It suits water, oil and gas within the rated temperature, and the seating faces resist wear from frequent operation.
Which body material should I choose: WCB, CF8 or CF3M?
WCB carbon steel for non-corrosive water, oil and gas. CF8 (cast 304) for general corrosion resistance. CF3M (cast 316L) for chlorides, seawater and chemical media.
What is the packing made of?
Graphite: braided graphite rings at the top and bottom of the stuffing box and flexible graphite rings in between. The gland is tightened with stainless eye bolts.
What documents ship with the valve?
A product test report with the heat number of the body casting, chemical composition, mechanical properties and the pressure test results. We welcome third-party inspection (e.g. SGS or BV), arranged and paid for by the buyer.
What is the lead time?
Standard sizes ship in 15–20 days. Large sizes and special options may take longer; we confirm the delivery date with your quote.
Need a Quote for This Valve?
Send size, PN, body material and quantity. An engineer replies within 24 hours.