Lined Butterfly Valve
Wafer & Full Lug Disc Valves for Large-Bore Corrosive Pipelines
2" – 24"
Size Range
Bi-directional
Connection
API 609 Category A
Design Std
PFA / FEP / PVDF
Lining
Engineered Lined Butterfly Valve for Corrosive Service
UNP’s Lined Butterfly Valve is engineered for the most demanding corrosive service applications. Wafer & Full Lug Disc Valves for Large-Bore Corrosive Pipelines
The dove-tail-anchored fluoropolymer lining (PFA, FEP, PVDF, ETFE, or PPH) makes every valve suitable for pressure and vacuum service. Investment-cast body components ensure uniform lining thickness even at intricate contours.
Every valve is 100% hydro and pneumatic tested with optional helium leak testing on request, certified to ISO 9001:2015 and CE under PED 1128.
Why Choose This Valve
- ✓Wafer & Full Lug body styles
- ✓PFA disc lining (FEP/PVDF/ETFE optional)
- ✓Class VI tight shutoff (API 598)
- ✓Loaded packing with top & bottom gland covers
- ✓-40°F to 450°F (PFA)
Technical Specifications
Engineered to meet international standards for corrosive valve service.
API 609 Category A
Valve Design
API 609
Face to Face
ANSI B 16.5
Connection Rating
API 598 / ISO 9393-2 / BS EN 12266-1
Test Standard
225 PSI
Max Pressure
Bi-directional
Flow Direction
Engineered for Performance
Every detail purpose-engineered for corrosive service longevity.
Virgin Materials
100% virgin PFA / FEP / PVDF from Dyneon, Chemours, Solvay.
Dove-Tail Lining
Anchored lining suitable for both pressure and vacuum service.
Investment Cast
Even lining at intricate contours via investment-cast bodies.
Injection Molded
Lining applied by injection (not transfer) — compact & reliable.
100% Tested
Hydro & pneumatic tested — optional helium leak testing.
ISO & CE Certified
ISO 9001:2015 + CE certification under PED 1128.
Multi-Standard
ANSI, DIN, and JIS flange dimensions available.
Antistatic Option
Antistatic PFA grade (C 980 / 8502 ESDZ) for explosive atmospheres.
Detailed Engineering Reference
Tests, weight chart, valve code reference, and pressure-temperature graph.
Tests Performed
| Test | Pressure Rating |
|---|---|
| Maximum Pressure | 225 PSI |
| Disc Sealing | Class VI (API 598) — Tight Shutoff |
| Flow Direction | Bi-directional |
| Spark Test (Lined Components) | 20 KVDC |
| Temperature Range (PFA) | -40°F to 450°F |
Valve Net Weight Chart
| Size | Wafer (kg) | Full Lug (kg) | Wafer (lb) | Full Lug (lb) |
|---|---|---|---|---|
| 2" | 5.00 | 6.50 | 11 | 14.30 |
| 2.5" | 6.00 | 7.50 | 13 | 16.50 |
| 3" | 7.00 | 8.60 | 15 | 19.00 |
| 4" | 9.00 | 13.40 | 20 | 16.08 |
| 5" | 20.00 | 23.00 | 44 | 50.60 |
| 6" | 23.00 | 25.50 | 51 | 56.10 |
| 8" | 26.00 | 30.50 | 57 | 67.10 |
| 10" | 45.00 | 51.00 | 112 | 112.20 |
| 12" | 62.00 | 75.00 | 136 | 165.00 |
| 14" | 66.00 | 80.00 | 145 | 176.00 |
| 16" | 112.00 | 135.00 | 246 | 297.00 |
| 18" | 157.00 | 189.00 | 346 | 415.80 |
| 20" | 288.00 | 346.00 | 634 | 761.20 |
| 24" | 420.00 | 504.00 | 924 | 1109.00 |
Valve Code Reference
Complete reference of code values used in this valve's part-numbering system.
Valve Type
| Option | Code |
|---|---|
| Wafer Type Butterfly | BFWR |
| Full Lug Butterfly | BFFL |
Body Casting
| Option | Code |
|---|---|
| ASTM A 216 GR. WCB | C1 |
| ASTM A 351 GR. CF 8 | C2 |
| ASTM A 351 GR. CF8M | C3 |
| ASTM A 890 GR. 4A (CD3MN) | C5 |
Lining Material
| Option | Code |
|---|---|
| PFA | L1 |
| FEP | L2 |
| PVDF | L3 |
| ETFE | L4 |
| Antistatic PFA | L7 |
Trim Inserts
| Option | Code |
|---|---|
| Alloy 20 | T4 |
| ASTM A 890 GR. 4A (CD3MN) | T5 |
| Super Duplex | T6 |
Seat / Backing Pads
| Option | Code |
|---|---|
| PTFE with Silicon | PS |
| PTFE with Viton | PV |
| TFM with Silicon | TS |
| TFM with Viton | TV |
Operation
| Option | Code |
|---|---|
| Lever | L |
| Gear | G |
| Bare Stem | B |
Fasteners
| Option | Code |
|---|---|
| SS 304 | F2 |
| SS 316 | F3 |
| High Tensile | F4 |
| ASTM A 193 GR. B7 | F5 |
Locking
| Option | Code |
|---|---|
| Provided | Y |
| Not Provided | N |
Pressure - Temperature Graph
Operating envelope across full size range and lining options.
Product Documentation
Brochures, datasheets, and installation manuals — ready for download.
Product Brochure
Full catalogue with options and variants (PDF, EN)
Technical Datasheet
Weight chart, tests, P-T graph (PDF, EN)
Installation Manual
Step-by-step installation guide (PDF, EN)
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