PVC-U and PPRC Butterfly Valves
PVC-U and PP butterfly valves are butterfly valves made of plastics for chemical, treatment and pool lines where metal corrosion is a problem. Only the disc and the sleeve seal contact the medium; the body is made of glass-fibre reinforced polypropylene, so it does not rust.
The disc is selected as PVC-U, PP-H or PVDF to suit the pipe material and medium, and the sleeve seal as EPDM or FPM. The valves are PN10, in sizes DN65–DN200 (d75–d225), designed to fit between DIN, ANSI, JIS and BS flanges.
Main Applications
- Water treatment and chemical dosing plants
- Swimming pool filtration and backwash lines
- Feed lines of galvanising and surface treatment baths
- Waste water and neutralisation units
- Brine and seawater cooling circuits
- Industrial process lines with PVC-U and PP piping
Technical Data
| Body type | Wafer and lug type, depending on model |
|---|---|
| Size range | DN65–DN200 (d75–d225; 2½”–8″) |
| Pressure class | PN10 |
| Flange compatibility | DIN 2501 PN10 · ANSI B16.5 Class 150 · JIS 10K · BS Table D/E |
| Temperature limit | By disc and seal material, from the pressure-temperature diagram |
| Wetted parts | Disc and sleeve seal only |
| Lug type one-sided use | DN65–DN125: max. 6 bar · DN150–DN200: max. 4 bar (temporary) |
| Lug type flange bolts | M16 (DN65–DN125) · M20 (DN150–DN200) |
| Flange bolt torque | 15 Nm (DN65) … 55 Nm (DN200) |
| Lever | Lockable lever with 10 positions and metal adapter |
| Stem sealing | Double-sealed stem |
| Operation options | Lever, electric actuator (IP65 / IP67), pneumatic actuator depending on model |
Material Options
| Part | PN10 · PVC-U disc | PN10 · PP-H disc | PN10 · PVDF disc |
|---|---|---|---|
| Body | Glass-fibre reinforced PP (PP-GF) | Glass-fibre reinforced PP (PP-GF) | Glass-fibre reinforced PP (PP-GF) |
| Disc | PVC-U | PP-H | PVDF |
| Sleeve seal | EPDM or FPM | EPDM or FPM | EPDM or FPM |
| Threaded lug insert (lug type) | Stainless A4 | Stainless A4 | Stainless A4 |
| Pin | Stainless A2 | Stainless A2 | Stainless A2 |
| Stem | Depending on model | Depending on model | Depending on model |
The disc material is usually matched to the pipeline: PVC-U disc for PVC-U pipe, PP-H for PP or PPR pipe, PVDF for higher temperatures and aggressive chemicals. For the seal, EPDM is preferred in aqueous and alkaline media and FPM in oils and many acids and solvents; suitability must be confirmed with the chemical resistance table.
Advantages
Corrosion Resistant
- No metal part contacts the medium.
- Long life in chemicals and brine.
Light Body
- Glass-fibre reinforced PP body.
- Less need for extra support on plastic lines.
Multiple Flange Standards
- DIN, ANSI, JIS and BS flanges.
- One valve type for plants with different standards.
Fine Lever Setting
- 10 locking positions.
- Flow can be fixed in steps.
Construction and Design Features
- Glass-fibre reinforced polypropylene body
- Replaceable sleeve seal (EPDM or FPM)
- PVC-U, PP-H or PVDF disc
- Double-sealed stem and metal adapter preventing lever wear
- Top flange for actuator mounting without extra parts
Request a quote for plastic butterfly valves by stating pipe material, size, medium and concentration, temperature and flange standard.
How to Choose?
- Match the disc to the pipePVC-U disc on PVC-U lines, PP-H on PP / PPR lines, PVDF for hot and aggressive media.
- Choose the seal by chemicalCheck the medium and concentration for EPDM and FPM in the chemical resistance table.
- Check temperature-pressure limitsPermissible pressure of plastics falls as temperature rises; confirm the duty point on the diagram.
- Apply flange bolt torquesState the flange standard; follow the manufacturer bolt torques to avoid damaging the plastic body.
Complementary Products
Why ORFA?
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Details →Get a quote for your project
Our sales team will prepare the best solution for your needs.