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NAF Ball Valve, Duball DL

Duball DL Ball Valve

Brand: Flowserve NAF AB
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NAF Duball DL is a full-bore ball valve which is equally suitable for isolation, on/off and modulating control applications. 

The NAF Duball DL is supplied as standard in stainless steel or carbon steel, but is also available in other materials, such as Duplex, titanium, etc. 

The NAF Duball DL is the fourth generation of the Duball portfolio, one of the most proven ball valve portfolios in the industry.
Features
  • A spring loaded stem seal packing that provides a long, maintenance free and safe operation in automated on/off and control service
  • Direct actuator mounting capabilities of the NAF Turnex actuator which provides a high performance, vibration resistant, compact valve package
  • A sturdy, blowout-proof stem with a long foot providing a high torque transmission with a minimum mechanical backlash
  • A floating ball that provides bidirectional tightness
  • The unique Z-trim option that minimizes cavitation and noise and has excellent control characteristics

Specifications

Brand

Applications

  • Chemical & Petrochemical
  • General Industries
  • Metal & Mining
  • Oil & Gas
  • Power Stations
  • Pulp & Paper

Approvals & Certifications

  • ATEX 94/9/EC Ex II 2 G/D C
  • CE-Marked According to PED 97/23/EG, Module H, Category III

Ball Material

  • 316 Stainless Steel - ASTM A351 CF8M, 1.4408 + Hard Chrome-Plated

Bushing Material

  • R-PTFE Carbon Reinforced

Cover Material

  • AISI 316L Stainless Steel, 1.4401
  • Body: 316 Stainless Steel - ASTM A351 CF8M, 1.4408
  • Carbon Steel

Differential Pressure

  • psi: 725.2 (kPa: 5,000, bar: 50) - Max.

Direct Mount

  • Yes

Enclosure, Body Material

  • 316 Stainless Steel - ASTM A351 CF8M, 1.4408
  • Carbon Steel
  • Duplex
  • Titanium

Flange Size - 1-1/2” (DN 40)

  • 1-1/2” (DN 40) - 150# ANSI
  • 1-1/2” (DN 40) - 300# ANSI
  • 1-1/2” (DN 40) - PN 40

Flange Size - 1” (DN 25)

  • 1” (DN 25) - 150# ANSI
  • 1” (DN 25) - 300# ANSI
  • 1” (DN 25) - PN 40

Flange Size - 10” (DN 250)

  • 10” (DN 250) - 150# ANSI
  • 10” (DN 250) - 300# ANSI
  • 10” (DN 250) - PN 10
  • 10” (DN 250) - PN 16
  • 10” (DN 250) - PN 25
  • 10” (DN 250) - PN 40

Flange Size - 12” (DN 300)

  • 12” (DN 300) - 150# ANSI
  • 12” (DN 300) - 300# ANSI
  • 12” (DN 300) - PN 10
  • 12” (DN 300) - PN 16
  • 12” (DN 300) - PN 25
  • 12” (DN 300) - PN 40

Flange Size - 14” (DN 350)

  • 14” (DN 350) - 150# ANSI
  • 14” (DN 350) - 300# ANSI
  • 14” (DN 350) - PN 10
  • 14” (DN 350) - PN 16
  • 14” (DN 350) - PN 25
  • 14” (DN 350) - PN 40

Flange Size - 16” (DN 400)

  • 16” (DN 400) - 150# ANSI
  • 16” (DN 400) - 300# ANSI
  • 16” (DN 400) - PN 10
  • 16” (DN 400) - PN 16
  • 16” (DN 400) - PN 25
  • 16” (DN 400) - PN 40

Flange Size - 2” (DN 50)

  • 2” (DN 50) - 150# ANSI
  • 2” (DN 50) - 300# ANSI
  • 2” (DN 50) - PN 40

Flange Size - 3” (DN 80)

  • 3” (DN 80) - 150# ANSI
  • 3” (DN 80) - 300# ANSI
  • 3” (DN 80) - PN 16
  • 3” (DN 80) - PN 40

Flange Size - 4” (DN 100)

  • 4” (DN 100) - 150# ANSI
  • 4” (DN 100) - 300# ANSI
  • 4” (DN 100) - PN 16
  • 4” (DN 100) - PN 40

Flange Size - 6” (DN 150)

  • 6” (DN 150) - 150# ANSI
  • 6” (DN 150) - 300# ANSI
  • 6” (DN 150) - PN 16
  • 6” (DN 150) - PN 40

Flange Size - 8” (DN 200)

  • 8” (DN 200) - 150# ANSI
  • 8” (DN 200) - 300# ANSI
  • 8” (DN 200) - PN 10
  • 8” (DN 200) - PN 16
  • 8” (DN 200) - PN 25
  • 8” (DN 200) - PN 40

Flow Capacity

  • 0 to 19,770 Cv at 15 to 90° Opening Angle

Materials of Construction

  • Anti-Friction Washer: PTFE + Stainless Steel
  • Circlip: 304 Stainless Steel (A2)
  • Key: Stainless Steel
  • Washer: AISI 316L Stainless Steel, 1.4401

Nut & Bolt Material

  • 316 Stainless Steel - ASTM A193 Grade B8M, ASTM A194 Grade 8M
  • Alloy Steel (ASTM A194 Grade 8M, ASTM A194 Grade 2HM)

Port

  • Full

Process Connection Style

  • Flanged

Ring Material

  • Seat: Alloy 6 (Cobalt/Stellite)
  • Seat: Stainless Steel

Screw Material

  • Stainless Steel

Seat / Seal Material

  • Body Seal: PTFE, Seat Seal: R-PTFE (Carbon-Filled Teflon)

Spring Material

  • 631 Stainless Steel (17-7PH)

Stem Material

  • 329 Stainless Steel (1.4460)
  • Stem Packing: R-PTFE Carbon Reinforced

Temperature Range

  • -30° to 250° C (-22° to 482° F)

Valve Type

  • Automated

Documentation

Data Sheets

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