3-Piece Stainless Steel Threaded Ball Valves
A 3-piece stainless steel threaded ball valve consists of two end pieces and a centre body bolted between them. While the ends stay on the pipe, the bolts can be removed and the centre body taken out, so ball and seats are replaced without cutting the line.
The store range offers PN63 models from ¼” to 4″ with AISI 304 and AISI 316 options. They are preferred on food, chemical and process lines where seats are renewed regularly.
Main Applications
- Process lines needing frequent service
- Food and beverage plants
- Chemical and paint lines
- High-temperature water and condensate lines
- Pump and filter connections
Technical Data
| Body design | Three-piece, bolted |
|---|---|
| Connection | Female threaded end pieces |
| Thread size | ¼” – 4″ (product range) |
| Pressure class | PN63 (product range) |
| Material | AISI 304 or AISI 316 (product range) |
| Ball seat | PTFE-based (by model) |
| Temperature | By material and seat |
| Maintenance | Centre body removed with ends left on the pipe |
Material Options
| Part | AISI 304 | AISI 316 |
|---|---|---|
| Centre body | AISI 304 | AISI 316 |
| End pieces | AISI 304 | AISI 316 |
| Ball | AISI 304 | AISI 316 |
| Bolts | Stainless (by model) | Stainless (by model) |
Which material? The real advantage of a 3-piece valve is serviceability; although its initial cost is higher than a 2-piece valve, not having to remove the line for seat replacement cuts labour and downtime.
Advantages
Service Without Removal
- Centre body swings out
High Pressure
- PN63
Long Life
- Seats and ball renewable
Two Materials
- AISI 304 and 316
Construction and Design Features
- Three-piece body joined with bolts
- End pieces screwed to the pipe
- Stainless ball and stem
- Replaceable ball seats
Send the thread size, medium and material grade; we will confirm the 3-piece stainless valve together with a spare seat kit.
How to Choose?
- Assess service needsChoose 3-piece on lines with frequent seat changes.
- Select the materialUse AISI 316 for aggressive media.
- Set the sizeWrite the pipe thread from ¼”–4″.
- Plan sparesAdd a seat kit as a spare.
Complementary Products
Why ORFA?
Other Stainless Steel Threaded Ball Valves
Our 3-Piece Stainless Steel Threaded Ball Valves
ORFA supplies 3-piece stainless steel threaded ball valves in a range of pressure classes, sizes and connection types to suit your application. Descriptions, technical specifications, materials and dimension tables are available on each detail page.
3-Piece Stainless Steel Threaded Ball Valve
3-piece stainless steel threaded ball valve: AISI 304/316, 1/4"–4", PN63, -25…+180 °C, PTFE, TS EN 1983. Maintenance without line removal.
Details →Welded 3-Piece Stainless Steel Ball Valve
Welded 3-piece stainless steel ball valve: socket-weld (SW) and butt-weld (BW) ends, AISI 304/316, DN15–DN100, PN16–PN40. Leak-free permanent connection.
Details →Jacketed 3-Piece Stainless Steel Ball Valve
Jacketed 3-piece stainless steel ball valve with heated body, AISI 304/316, DN15–DN100, PN16–PN40. Straight and L-type 3-way options for solidifying fluids.
Details →Get a quote for your project
Our sales team will prepare the best solution for your needs.