Features of EPDM Lined Disc Butterfly Valve
Fully Epdm lined butterfly valve refers to internal surfaces of the valve, including the disc and the body, are completely covered or lined with EPDM rubber.
- Advanced sealing: EPDM Lined Disc Butterfly Valve can effectively prevent leakage and ensure that fluid will not leak or penetrate into the valve structure, improving the safety and efficiency of the system.
- Corrosion resistance: The outer layer of the EPDM Lined Butterfly Valve disc is coated with EPDM material. It can withstand the erosion of various chemicals and corrosive media.
- Replaceable seat: soft back seat EPDM seat is replacable, when it ages or breaks can save costs.
- Wide application: EPDM fully lined butterfly valve is suitable for fluid control and treatment in various fields, such as water treatment, chemical industry, petroleum, pharmaceutical, food, etc.
Basic Info of EPDM Lined Disc Butterfly Valve
Material
| Part Name | Material/Method |
| Body | Ductile Iron, Casting Iron, WCB, LCB/LCC, Stainless Steel, Duplex Stainless Steel, Aluminium Bronze |
| Disc | Ductile Iron(Coated/Lined), WCB, LCB/LCC, Stainless Steel, Duplex Stainless Steel, Aluminium Bronze |
| Seat | PFA, Rubber(EPDM/NBR/VITON), Nature Rubber, Silicon Rubber, PU, HNBR, Hypalon |
| Stem | 304, 316, 420(2Cr13), 431, 1.4462, 17-4PH, Monel |
| Actuator | Handlever, Worm Gear, Electric, Pneumatic |
Technical Data
| ITEM | Standard |
|---|---|
| Nominal Diameter Range | DN50-DN600 |
| Design | EN593 | API609 |
| Face to Face | EN558 | ISO5752 | API608 | BS5155-4 |
| Top Flange | ISO5211 |
| Flange Drilling | PN6 | PN10 | PN16 | ASME B16.5 CL150 | JIS 10K |
| Pressure Rating | PN6 | PN10 | PN16 | PN25 | CL150 | JIS 10K |
| Tightness Test | ISO5208 | API598 | EN12266-1 |
Paraments of EPDM Lined Disc Butterfly Valve
| SIZE | øD | øD1 | L | L1 | H | H1 | H2 | ø2 | ø3 | 4-ød1 | T*T |
|---|---|---|---|---|---|---|---|---|---|---|---|
| DN25 | 55 | 33 | 26 | 29 | 30 | 122 | 48 | 50 | 65 | 7 | 11 |
| DN40 | 65 | 43.1 | 33 | 36 | 30 | 139 | 70 | 50 | 65 | 7 | 11 |
| DN50 | 82 | 53.08 | 42.5 | 46.1 | 30 | 140 | 60 | 70 | 90 | 10 | 11 |
| DN65 | 94 | 64.82 | 45.6 | 49 | 30 | 150 | 67 | 70 | 90 | 10 | 11 |
| DN80 | 111.2 | 79.04 | 45.6 | 48.4 | 30 | 160 | 87 | 70 | 90 | 10 | 11 |
| DN100 | 140 | 104.04 | 52 | 56 | 30 | 180 | 105 | 70 | 90 | 10 | 11 |
| DN125 | 166 | 123.3 | 56 | 60 | 30 | 190 | 118 | 70 | 90 | 10 | 14 |
| DN150 | 187 | 155.68 | 56 | 60 | 30 | 210 | 130 | 70 | 90 | 10 | 14 |
| DN200 | 246.8 | 201.9 | 60 | 64 | 35 | 235 | 166 | 102 | 125 | 12 | 17 |
| DN250 | 301.5 | 250.45 | 68 | 72 | 35 | 270 | 197 | 102 | 125 | 12 | 22 |
| DN300 | 352 | 301.55 | 78 | 83 | 35 | 305 | 231 | 102 | 125 | 12 | 22 |
| DN350 | 390 | 333.8 | 78 | 83 | 35 | 360 | 255 | 125 | 150 | 14 | 22 |
| DN400 | 452 | 389 | 102 | 106 | 50 | 381 | 293 | 140 | 175 | 18 | 27 |
| DN450 | 510 | 439.2 | 114 | 118 | 50 | 425 | 325 | 140 | 175 | 18 | 27 |
| DN500 | 564 | 491.4 | 127 | 132 | 50 | 470 | 363 | 140 | 175 | 18 | 36 |
| DN600 | 651 | 579 | 153 | 159 | 60 | 565 | 425 | 165 | 210 | 22 | 36 |
Manufacture Process of Butterfly Valve
Application of EPDM Lined Disc and Seat Butterfly Valve
EPDM coated plates and seats, suitable for certain corrosive fluids, but not for oils:
1. Water Treatment and Distribution (Most Common)
– Drinking Water: Our EPDM meets Drinking Water Contact Standards (WRAS). The fully lined design prevents iron/carbon steel valve bodies from rusting, thus avoiding “red water” contamination.
– Wastewater/Sewage: Excellent resistance to weak acids, weak alkalis, and salts commonly found in municipal sewage.
– Raw Water (Cooling Water): Used in power plants and industrial cooling towers to treat untreated river or seawater.
2. Chemical Processing
– Dilute Acids and Alkalis: Dilute sulfuric acid, phosphoric acid, sodium hydroxide (caustic soda).
– Oxidizing Chemicals: Hypochlorite (bleach), ozone, dilute hydrogen peroxide.
– Brine (Concentrated Brine): Seawater desalination plants and chlor-alkali processes.
3. Marine and Offshore Operations
– Seawater Intake Systems: Seawater is highly corrosive to carbon steel and even some stainless steels (pitting corrosion). EPDM full lining completely isolates the metal body.
4. Industrial and HVAC
– Air conditioning chillers: EPDM can withstand chilled water/ethylene glycol mixtures without degradation.
– Fire protection systems.
– Pulp and paper: Treatment of white water and certain bleaching chemicals.
5. Food and beverage (specific applications)
– Dairy/brewing plants: Due to EPDM’s resistance to hot water and mild detergents, it is often used for gaskets in CIP (clean in situ) systems.
Certificates
WRAS
CE
ISO 9001
EAC Russia
