Images are representations only.
Neles Series LW & LG Butterfly Valve
Brand: ValmetNeldisc wafer type LW and lug type LG series are metal seated, high performance butterfly valves specially designed to fulfill the requirements of chemical, petrochemical, refining and pulp and paper industries.
With a nearly equal percentage characteristics and superior tightness Neldisc butterfly valves operate both in control and shut-off applications.
As a result of the unique triple offset geometry of Neldisc, the contact between disc and seat is mechanically induced and does not rely on assistance from differential pressure.
Due to a number of special constructions developed from the versatile Neldisc design, these valves offer a powerful tool for standardization and are truly high performance valves.
Specifications
Brand
Actuator Type
- Gear Operator
- Hand Lever
- Pneumatic
- Spring Return
Applications
- ATEX
- Chemical
- Petrochemical
- Pulp & Paper
- Refining
- Shut Off Applications
Approvals & Certifications
- API 598
- API 607, 6th Edition
- API 609, Category B
- Fire Safe: BS 6755
- ISO 15848
Bearing Material
- AISI 316 Stainless Steel
- Cobalt-based Alloy
- PTFE
Disc Material
- 316 Stainless Steel - ASTM A182, F316
Enclosure Finish
- Hard Chrome Coated
Enclosure, Body Details
- Lug
- Wafer
Enclosure, Body Material
- 316 Stainless Steel - ASTM A351 CF8M, 1.4408
- Carbon Steel (ASTM A216 Grade WCB)
Flange Material
- Blind: 316 Stainless Steel - ASTM A351 CF8M, 1.4408
Flange Size - 10” (DN 250)
- 10” (DN 250) - 150# ASME
- 10” (DN 250) - 300# ASME
Flange Size - 12” (DN 300)
- 12” (DN 300) - 150# ASME
- 12” (DN 300) - 300# ASME
Flange Size - 14” (DN 350)
- 14” (DN 350) - 150# ASME
- 14” (DN 350) - 300# ASME
Flange Size - 16” (DN 400)
- 16” (DN 400) - 150# ASME
- 16” (DN 400) - 300# ASME
Flange Size - 18” (DN 450)
- 18” (DN 450) - 150# ASME
- 18” (DN 450) - 300# ASME
Flange Size - 20” (DN 500)
- 20” (DN 500) - 150# ASME
- 20” (DN 500) - 300# ASME
Flange Size - 24” (DN 600)
- 24” (DN 600) - 150# ASME
- 24” (DN 600) - 300# ASME
Flange Size - 28” (DN 700)
- 28” (DN 700) - 150# ASME
- 28” (DN 700) - 300# ASME
Flange Size - 3” (DN 80)
- 3” (DN 80) - 150# ASME
- 3” (DN 80) - 300# ASME
Flange Size - 30” (DN 750)
- 30” (DN 750) - 150# ASME
- 30” (DN 750) - 300# ASME
Flange Size - 32” (DN 800)
- 32” (DN 800) - 150# ASME
- 32” (DN 800) - 300# ASME
Flange Size - 36” (DN 900)
- 36” (DN 900) - 150# ASME
- 36” (DN 900) - 300# ASME
Flange Size - 4” (DN 100)
- 4” (DN 100) - 150# ASME
- 4” (DN 100) - 300# ASME
Flange Size - 40” (DN 1000)
- 40” (DN 1000) - 150# ASME
- 40” (DN 1000) - 300# ASME
Flange Size - 6” (DN 150)
- 6” (DN 150) - 150# ASME
- 6” (DN 150) - 300# ASME
Flange Size - 8” (DN 200)
- 8” (DN 200) - 150# ASME
- 8” (DN 200) - 300# ASME
Flow Rate
- 235 to 10,498 Cv at Cv 80° - LW5D, LG5D (ASME Class 300) Model
- 235 to 22,141 Cv at Cv 80° - LW5C, LG5C (ASME Class 150) Model
- 245 to 12,100 Cv at Cv 90° - LW5D, LG5D (ASME Class 300) Model
- 245 to 31,000 Cv at Cv 90° - LW5C, LG5C (ASME Class 150) Model
Gasket Material
- Blind Flange: Graphite
Gland Material
- 316 Stainless Steel - ASTM A351 CF8M, 1.4408
Gland Packing Material
- Graphite
- PTFE (V-Ring)
Materials of Construction
- Key: 329 Stainless Steel
- Pin: 630 Stainless Steel (17-4 PH)
- Stud, Retaining Plate, Pin: Stainless Steel (A4-70 / DIN 267, XM-19)
NACE & NIST
- NACE MR-0103
- NACE MR-0175
Name Plate, Tag Material
- AISI 304 Stainless Steel
NPT Connection
- 1” NPT
- 1/2” NPT
- 3/4” NPT
- 3/8” NPT
Nut & Bolt Material
- Hexagon Nut: Stainless Steel (A4-70 / DIN 267)
Operating Pressure
- psi: 421.9 to 719.2 (kPa: 2,909 to 4,959, bar: 29.09 to 49.59) - Max.
- psi: 500.2 to 740.9 (kPa: 3,449 to 5,108, bar: 34.49 to 51.08) - Max.
- psi: 94.2 to 275.5 (kPa: 649.5 to 1,900, bar: 6.49 to 19) - Max.
- psi: 94.2 to 284.2 (kPa: 649.5 to 1,959, bar: 6.49 to 19.59) - Max.
Packing Material
- Graphite
- PTFE (V-Ring)
Ring Material
- Anti-Extrusion: Graphite
- Clamp, Anti-Extrusion: 316 Stainless Steel - ASTM A351 CF8M, 1.4408
- Seat: Hard Chrome Coated Incoloy 825
Screw Material
- Hex Socket Head Cap: Stainless Steel (A4-70 / DIN 267)
Seat / Seal Material
- Body Seal: Graphite
- Seat: Alloy (2.4681 / UNS R31233)
- Seat: Incoloy 825
Shaft Material
- Drive: AISI 630 Stainless Steel (17-4 PH)
- Nimonic 80A (Alloy)
- Stainless Steel (XM-19)
Temperature Range
- -200° to 600° C (-330° to 1,110° F)
- Chemical
- Petrochemical
- Refining
- Pulp and paper
