Metal-seated ball valve · Made in our Wenzhou plant
One-Piece Metal-Seated Flanged Ball Valve — GB PN16 & JIS 10K
A flanged ball valve with a one-piece (integral) cast body and metal seats. With no body joint in the middle, there is no body gasket that can leak to the outside. Made in 304 stainless (CF8), 316L stainless (CF3M) or WCB carbon steel, with GB PN16 or JIS 10K flanges, and pressure-tested in our own plant.
- No body joint: one less leak path to the outside
- Flow arrow cast on the body for correct installation
- Every valve shell- and seat-tested before shipment
An engineer replies within 24 hours.
Specifications
Technical Data
| Valve type | Ball valve, flanged, metal-seated |
| Body construction | One-piece (integral) cast body |
| Seat | Metal (hard seal) |
| Standard / rating | GB PN16 · JIS 10K |
| Body material | CF8 (304) · CF3M (316L) stainless steel · WCB (A216) carbon steel |
| Top | Mounting pad on the body neck |
| Body markings | DN, PN, material and flow arrow cast on the body |
| Testing | Shell and seat test on every valve |
| Documents | Material certificate and test report with every shipment |
Why one-piece
One-Piece vs Two-Piece Body
| One-piece | Two-piece | |
|---|---|---|
| Body joint | None | Bolted, with gasket |
| External leak paths | Stem seal only | Stem seal and body joint |
| Opening the body | Not split | Can be split at the joint |
Choose a metal seat when the media is too hot for a PTFE seat or carries particles that would cut a soft seat.
Installation
Install with the Arrow in the Flow Direction
The flow arrow is cast on the body next to the size and rating. Mount the valve so the arrow points the same way as the flow in your line.
- Check the arrow before bolting the flanges
- Size, PN and material are cast in the same box, so the valve can be checked on site
- Tell us the flow direction in your RFQ if the valve goes on a skid or in a module
MARKINGS · FLOW ARROWTesting
Pressure Test on Every Valve
| Test | Pressure |
|---|---|
| Shell test (water) | PN16: 2.4 MPa |
| Seat test (water) | PN16: 1.76 MPa |
GB PN16 version, tested per GB/T 26480. JIS 10K version: test pressures follow the 10K rating. Actual values for each valve are on the test report shipped with the order.
Pressure rating
GB PN16 or JIS 10K
| Rating | Nominal pressure (MPa) |
|---|---|
| GB PN16 | 1.6 |
| JIS 10K | 1.0 |
Nominal pressure at room temperature. The allowed pressure falls as the temperature rises; send us the design pressure and temperature and we confirm the rating.
Real photos
One-Piece Ball Valves from Our Plant
CF8 · DN32
WCB · DN40
WCB · DN80
WCB · DN100
MATERIAL CHECK · SPECTROMETERQuality records
Mill Test Certificate (EN 10204 3.1) 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 per GB/T 26480
- Signed and stamped by our QC department
SAMPLE MTC · EN 10204 3.1 · CLICK TO OPEN
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 MTC (PDF)Made in one plant
From Machining to Crate in Wenzhou
01 MACHINING
02 DRILLING
03 ASSEMBLY
04 PRESSURE TESTSee the valve before you order
Real footage from our ball valve line. Want to see your own order? Book a live video call and we show your valves on the test bench.
Book a Video Tour
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
How to order
What We Need for Your Quote
Metal seats are chosen for the service. Tell us the media, temperature and pressure, and we confirm the valve for that duty with your quote.
Send us these 8 details for a fast quote
- Size (DN)
- Body material (304 / 316L / WCB)
- Flange standard (GB PN16 or JIS 10K)
- Media, with any solids or particles
- Operating temperature
- Operating pressure
- Hand-operated or actuated
- Quantity and destination port
FAQ
Frequently Asked Questions
What is a one-piece ball valve?
A ball valve whose body is cast as one part, with no bolted joint in the middle. Without a body joint there is no body gasket, so the only seal to the outside is at the stem.
When should I choose a metal-seated ball valve?
When the line runs hotter than a PTFE seat can take (+150 °C, or +180 °C with RPTFE), or when the media carries particles, scale or crystals that would cut a soft seat. For clean media at lower temperatures, a soft-seated valve such as our GB/T 12237 manual ball valve seals tighter and costs less.
Why is there an arrow on the body?
It shows the flow direction. Install the valve with the arrow pointing the same way as the flow in the line.
Which body materials do you make?
304 stainless (CF8), 316L stainless (CF3M) and WCB carbon steel, with GB PN16 or JIS 10K flanges. Size, rating and material are cast on every body.
What documents ship with the valve?
A material certificate and a pressure test report. We welcome third-party inspection, arranged and paid for by the buyer.
What is the lead time?
Standard sizes ship in 15–20 days. We confirm the delivery date with your quote.
Need a Quote for This Valve?
Send size, body material, media, temperature and quantity. An engineer replies within 24 hours.