Fleck 2850

Summary

Product identification

• Model: 2850
• Type: 1.5" Control Valve
• Part Number: 40726 Rev B
• Date: 7/09

Features

• Fully adjustable, 5-cycle control: upflow backwash, downflow brining and slow rinse, rapid rinse, timed brine refill, and downflow service.
• Hydraulically balanced piston, seal, and spacer design.
• Lead-free brass valve body.
• Backwash capacity: suitable for tanks up to 30" diameter.
• 1-1/2" top mount control valve for commercial/industrial applications.
• Timed brine refills for consistent brining.
• Choice of 7 or 12-day clock, manual, or meter initiation.
• Continuous flow rate: 51 GPM.
• Backwash flow rate: 49 GPM.
• Suitable for filter applications up to 24".

Options

• Meter-initiated regeneration
• Backwash filter
• No hard water bypass
• Environmental cover
• Electronic timer (3200NXT, 3214NXT, or XT)
• Hot water (time clock: 180°F; metered valve: 150°F)
• Manual operation
• Service valve operator
• Auxiliary switch
• Side mount

Valve Specifications

• Valve material: Lead-free brass
• Inlet/Outlet: 1-1/2" NPTF
• Cycles: 5
• Flow Rates (50 psi inlet, valve alone):
  • Continuous (15 psi drop): 51 GPM (side mount)
  • Peak (25 psi drop): 66 GPM (side mount)
• Cv (flow at 1 psi drop): 13-1/5
• Max. backwash (25 psi drop): 49 GPM
• Regeneration: Downflow/Upflow or Downflow only.
• Adjustable cycles: Yes
• Regeneration time available:
  • Electromechanical: 164 minutes
  • SXT: 0 - 99 minutes per cycle
  • NXT: 240 minutes per cycle
  • XT: Up to 240 minutes per cycle

Meter Information

• Meter accuracy:
  • 7/10 - 40 GPM (1"): ±5%
  • 1-1/2 - 75 GPM (1-1/2"): ±5%
• Meter capacity range (gallons):
  • 1" Standard: 310 - 5,270
  • 1" Extended: 1,150 - 26,350
  • 1-1/2" Standard: 625 - 10,625
  • 1-1/2" Extended: 3,125 - 53,125
  • 3200NT: 2,900,000
  • 3214NT: 9,900,000
  • XT: 1,000 - 9,900,000

Mechanical / Hydraulic

• Distributor pilot: 1-9/10" O.D.
• Drain line: 1" NPTM
• Injector brine system:
  • 1600 & 1650: 3/8"
  • 1700: 1/2"
• Brine line: 3/8" & 1/2"
• Mounting base: 4" - 8 UN
• Height from top of tank: 6-1/2"

Operating Limits

• Pressure:
  • Hydrostatic: 300 psi
  • Working: 20 - 125 psi
• Temperature: 34° - 110° F

Electrical

• Ratings: 24V, 110V, 220V - 50 Hz, 60 Hz
• Max. VA: 72

Additional Information

• Estimated shipping weight:
  • Time clock: 19 lbs.
  • Metered valve: 27 lbs.
• Tested and Certified by the WQA to NSF/ANSI Std. 61 Section 8 (Material Safety Only) and Annex "G".

Disclaimer: This extraction may miss figures, footnotes, or revisions. Contractual data must match the OEM PDF revision used on the project.

Official datasheet (PDF)

Lenntech datasheet mirror