3-Piece Flanged Stainless Steel Ball Valves
A three piece flanged stainless ball valve is a ball valve whose body, end caps, ball and stem are made of stainless steel and whose flanges are integral with the body. It offers the robustness of a flanged joint on process lines where hygiene and corrosion resistance are required together.
Products are made in the DN15–DN100 range in AISI 304 and AISI 316 grades. Every valve is tested at the factory with 10 bar air in the open and closed positions.
Main Applications
- Stainless circuits in heating and cooling lines
- Product and CIP lines in food plants
- Acidic and alkaline media lines in the chemical industry
- Seawater circuits in shipbuilding
- Chemical dosing lines in paper mills
- Stainless process lines in treatment plants
Technical Data
| Connection | Flanged |
|---|---|
| Bore range | DN15 (1/2″) – DN100 (4″) |
| Max. pressure | 40 bar |
| Temperature | −25 °C … +180 °C (depending on material) |
| Body and caps | AISI 304 or AISI 316 |
| Ball and stem | AISI 304 or AISI 316 |
| Ball seat | R-PTFE (15%) |
| Body gasket and packing | PTFE |
| Face-to-face length | DN15: 130 mm · DN50: 230 mm · DN100: 350 mm |
| Operating torque | DN15: 5 N·m · DN50: 25 N·m · DN100: 110 N·m |
| Weight | DN15: 1.9 kg · DN50: 8.5 kg · DN100: 28.2 kg |
| Factory test | 10 bar air in open and closed positions, 100% |
Material Options
| Part | PN40 · AISI 304 | PN40 · AISI 316 |
|---|---|---|
| Body | Stainless steel AISI 304 | Stainless steel AISI 316 |
| End cap | Stainless steel AISI 304 | Stainless steel AISI 316 |
| Ball | Stainless steel AISI 304 | Stainless steel AISI 316 |
| Stem | Stainless steel AISI 304 | Stainless steel AISI 316 |
| Ball seat | R-PTFE (15%) | R-PTFE (15%) |
| Body gasket | PTFE | PTFE |
| Packing and sealing gasket | PTFE | PTFE |
| Studs and nuts | Stainless steel AISI 304 | Stainless steel AISI 304 |
| Handle and lock | Stainless steel AISI 304 | Stainless steel AISI 304 |
The table is from the manufacturer part list of a three piece flanged stainless valve. PN16 class models and models with an actuator pad have different dimensions; the relevant datasheet is shared with the quotation.
Advantages
All Stainless Body
- The whole body including the flanges is stainless.
- No painting is needed against external corrosion.
High Pressure
- Provides working pressure up to 40 bar.
- Used safely on pump discharge lines.
Easy Service
- The centre body is removed by undoing the bolts.
- Ball seats are renewed without removing the valve from the line.
Tested
- Every valve passes an air test in two positions.
- No sealing surprises on site.
Construction and Design Features
- The body consists of a centre section, two flanged end caps and the studs joining them.
- The ball runs between two R-PTFE seats.
- Sealing is provided in two stages: at the ball and at the stem.
- The stem is tightened with PTFE packing and a sealing nut.
- The valve can be installed in any position.
Send us the DN, AISI grade and medium; we will confirm the suitable model and stock status.
How to Choose?
- Define the gradeChoose AISI 304 for general process, AISI 316 for chloride and acidic environments.
- Check flange compatibilityCompare the DN and number of bolt holes of the mating flange with the flange dimensions in the datasheet.
- Read the pressure-temperature pointCheck the permissible pressure at operating temperature from the datasheet chart.
- Note the torqueIf an actuator is planned, use the valve torque (110 N·m at DN100) for actuator selection.
- Plan maintenanceOn frequently cleaned lines, order a spare ball seat set together.
Complementary Products
Why ORFA?
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Details →Our 3-Piece Flanged Stainless Steel Ball Valves
ORFA supplies 3-piece flanged stainless steel 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 Flanged Stainless Steel Ball Valve
3-piece flanged stainless steel ball valve: AISI 304/316, R-PTFE, DN15–DN200, PN40 (PN16 at larger sizes), -25…+180 °C. Size table, technical specifications. Request a quote.
Details →Jacketed Flanged Stainless Steel Ball Valve
Jacketed flanged stainless steel ball valve: full heating jacket, 3-piece body, AISI 304/316, DN15–DN200, PN16–PN40. For solidifying fluids.
Details →High-Temperature Flanged Stainless Steel Ball Valve
High-temperature flanged stainless steel ball valve: -40…+250 °C, 3-piece, AISI 304/316, DN15–DN100, PN16/PN40. For steam, hot oil and high-temperature process lines.
Details →3-Way Flanged Stainless Steel Ball Valve
3-way flanged stainless steel ball valve: L-type and T-type ball, AISI 304/316, DN15–DN100, PN16–PN40. Flow direction, mixing and diverting.
Details →Actuator-Ready Flanged Stainless Steel Ball Valve
ISO 5211 direct-mount flanged stainless steel ball valve: 2- and 3-piece body, AISI 304/316, DN15–DN200, PN40/PN16, pneumatic and electric actuator compatible.
Details →Wafer Tip Stainless Steel Ball Valve
Wafer tip stainless steel ball valve: compact body clamped between two flanges with bolts, full bore, ISO 5211 direct-mount, AISI 304/316, DN15–DN100.
Details →Get a quote for your project
Our sales team will prepare the best solution for your needs.