Polymer Butterfly Valve
Polymer butterfly valve for shutting off and opening flow on larger irrigation and drinking-water lines; light, rust-free polymer body, lever or gearbox, DN50 to DN300.
- Opens and closes with a quarter turn
- Light, rust-free polymer body
- Lever or gearbox
- DN50 to DN300
- For irrigation and drinking water
Key Specifications
- Product code
- P118
- Material & grade
- U-PVC
- Nominal diameter
- DN50 to DN300
- Unit of sale
- Piece
- Applications
- Irrigation & agriculture, Drinking water supply
- Dimensional options
- 9 rows in the specification table
What a polymer butterfly valve is for
A butterfly valve has a round disc that turns a quarter turn to open or close the flow. The polymer version is lighter than the cast iron one and does not rust, so it is a good choice for farm pump stations, the heads of irrigation mains and networks with aggressive or saline water.
A butterfly valve is shorter and lighter than a gate valve of the same size and takes less space. On larger sizes a gearbox makes opening and closing slow and controlled so no sudden surge hits the line.
Sizes and ordering
Our rows cover this valve in DN50, DN65, DN80, DN100, DN125, DN150, DN200, DN250 and DN300. Our catalogue also names the pressure class and operator (lever or gearbox) as variables.
If the valve connects to PE pipe, a matching stub end and backing ring are needed. In your enquiry give the DN, pressure class, lever or gearbox, the connecting PE pipe diameter and the quantity.
Butterfly valve installation tips
A wafer butterfly valve sits between two flanges and must be fully aligned before the bolts are tightened. During installation keep the disc slightly open so its edge does not hit the flanges or gasket, and tighten the bolts crosswise and evenly.
Do not fit a butterfly valve closer than a few pipe diameters to a pump, elbow or check valve, so turbulent flow does not strike the disc. With a polymer body, do not overtighten the bolts, and support the pipes on both sides so the weight of the line does not rest on the valve.
Open and close slowly; on large sizes a gearbox keeps this controlled.
Polymer Butterfly Valve — Technical Specifications
Wall thickness and weight are calculated from the standard series and are approximate; final values are confirmed in the quotation.
| Nominal Diameter |
|---|
| DN50 |
| DN65 |
| DN80 |
| DN100 |
| DN125 |
| DN150 |
| DN200 |
| DN250 |
| DN300 |
Polymer Butterfly Valve — FAQ
What is the advantage of a polymer butterfly valve?
It is lighter than cast iron and does not rust.
Which sizes are supplied?
DN50 to DN300.
Lever or gearbox?
A lever suits small sizes; a gearbox makes opening and closing gentler on large sizes.
How does it connect to PE pipe?
With a stub end and backing ring.
