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Jamesbury Series 835 Soft-Seated Butterfly Valve

Brand: Valmet

Series 835 process-rated ANSI Class 150 high performance Wafer-Sphere butterfly valves are an excellent effective alternative for shutoff pressures up to 100 psi (6.9 bar). 

The Series 835 provides the same long-lasting tight shutoff capability, excellent flow characteristics, and long service life as the fully ANSI-rated series 815. 

They are available in 30" to 60" (DN 750 to 1500) designs. 

The Series 835 Wafer-Sphere butterfly valve is available with trim materials and seat combinations to fit a wide variety of applications from water to abrasives and from air to steam. 

Valves in this bulletin meet NACE MR0103 requirements when equipped with 17-4 PH shafts. 

Optionally available are valves specifically pre- pared for oxygen or high-vacuum service and valves conforming to the European Pressure Equipment Directive 97/23/EC requirements.

Specifications

Brand

Approvals & Certifications

  • CE
  • MSS-SP61, SP-25, SP-44, SP-55, SP-68

Bearing Material

  • Shaft: 316 Stainless Steel
  • Shaft: PTFE Composite
  • Thrust: Stainless Steel

Disc Material

  • 316 Stainless Steel

Enclosure, Body Details

  • Wafer

Enclosure, Body Material

  • 316 Stainless Steel - ASTM A351 CF8M, 1.4408 - 835L-11-36HB, 835L-11-3600, 83PL-11-36HB, 83PL-11-3600, F835L-11-36HB, F83PL-11-36HB Model
  • 316L Stainless Steel - ASTM A182 F316L - 835L-11-36HB, 835L-11-3600, 83PL-11-36HB, 83PL-11-3600, F835L-11-36HB, F83PL-11-36HB Model
  • Carbon Steel (ASTM A216 WCB, ASTM A105) - 835L-11-22HB, 835L-11-2236, 83PL-11-22HB, 83PL-11-2236, F835L-31-22HB, F83PL-31-22HB Model

Flange Size - 30” (DN 750)

  • 30” (DN 750) - 150# ANSI

Flange Size - 36” (DN 900)

  • 36” (DN 900) - 150# ANSI

Flange Size - 40” (DN 1000)

  • 40” (DN 1000) - 150# ANSI

Flange Size - 42” (DN 1050)

  • 42” (DN 1050) - 150# ANSI

Flange Size - 48” (DN 1200)

  • 48” (DN 1200) - 150# ANSI

Flange Size - 54” (DN 1350)

  • 54” (DN 1350) - 150# ANSI

Flange Size - 60” (DN 1500)

  • 60” (DN 1500) - 150# ANSI

Flow Rate

  • 44,000 to 219,000 Cv

Gasket Material

  • Graphite
  • PTFE

Materials of Construction

  • Bottom Bearing Spacer [30” to 42” (DN 750 to 1050)], Top Bearing Spacer: PTFE
  • Insert (835L-11-22HB, 835L-11-2236, 83PL-11-22HB, 83PL-11-2236, F835L-31-22HB, F83PL-31-22HB Model): Carbon Steel
  • Insert (835L-11-36HB, 835L-11-3600, 83PL-11-36HB, 83PL-11-3600, F835L-11-36HB, F83PL-11-36HB Model), Compression Plate, Stud, Lock Washer, Spacer, Cover Plate: Stainless Steel
  • Spacer: 316 Stainless Steel

Media

  • Water

NACE & NIST

  • NACE MR-0103

Name Plate, Tag Material

  • Stainless Steel

Nut & Bolt Material

  • Hex Jam Nut: Stainless Steel

Operating Pressure

  • psi: 170 to 275 (kPa: 1,170 to 1,900, bar: 11.7 to 19) - 316 Stainless Steel
  • psi: 170 to 285 (kPa: 1,170 to 1,970, bar: 11.7 to 19.7) - Carbon Steel

Pressure Drop

  • psi: 1 (kPa: 6.9, bar: 0.69)

Pressure Type

  • Differential

Ring Material

  • Top Compression [42” to 60” (DN 1050 to 1500)]: Stainless Steel

Screw Material

  • Drive, Cap: Stainless Steel

Seat / Seal Material

  • Seat: 316 Stainless Steel
  • Seat: XTREME
  • Shaft Seal, Seat: Carbon-Filled Enhanced PTFE
  • Shaft Seal: Graphite
  • UHMW Polyethylene

Shaft Material

  • 630 Stainless Steel (17-4 PH)
  • Bonnet-End (Driver), Non-Bonnet End (Idle): 316 Stainless Steel
  • Bonnet-End (Driver): 630 Stainless Steel (17-4 PH)

UNF/UNC Connection

  • 1”-8 UNC
  • 1-1/4”-7 UNC
  • 1-1/8”-8 UNC
  • 3/4”-10 UNC
  • 5/8”-11 UNC
  • 7/8”-9 UNC

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