Clack 2620 WS1.25EI

Summary

Product identification

• Product Line: Clack Control Valves
• Model: WS1.25EI (Water Specialist 1.25” EI Control)
• Certifications: NSF/ANSI 44, 61 and 372.
• Patents: U.S. Patents 6,402,944 and 6,444,127

Features

• Solid state microprocessor with front panel settings.
• Front panel display: time of day, days until next regeneration, volume remaining, current flow rate, and total volume used (Totalizer).
• Regeneration initiation methods: meter immediate, meter delayed, time clock delayed, or pressure differential.
• Optional double backwash feature.
• Fully adjustable 6-cycle control: backwash, downflow brining/slow rinse, second backwash, fast rinse, refill, and downflow service.
• Coin cell lithium battery back-up with 8-hour carry-over.
• Backwash and brining ability for up to 21” diameter tanks.
• Downflow or upflow brining regeneration.
• 12-volt output AC adapter.
• Patented one-piece expanding seal spacer stack assembly.
• Patented linearly reciprocating piston operation.
• Control valve design for optimum service and backwash rates.
• Post-treated water regenerant refill.
• 24-hour clock.
• Mixing valve option available.
• DC drive.
• Options: Backwash Filter, Weather Cover.

Operating limits

• Operating Pressures: 20 - 125 psi (1.4 - 8.6 bar)
• Operating Temperatures: 40º - 110º F (4º - 43ºC)

Feed water

• Compatible regenerants/chemicals: Sodium chloride, potassium chloride, potassium permanganate, sodium bisulfite, chlorine and chloramines.

Product water

• Cycles of Operation (Softener):
  • 1. Backwash 1st (upflow): 1-95 minutes
  • 2. Regenerate Draw/Slow Rinse (downflow): 1-180 minutes
  • 3. Backwash 2nd (upflow): 1-95 minutes
  • 4. Fast Rinse (downflow): 1-95 minutes
  • 5. Regenerant Refill (in service with treated water): 0.1-99.0 minutes
  • 6. Service (downflow)
• Cycles of Operation (Filter):
  • 1. Backwash: 1-95 minutes
  • 2. Rinse: 1-95 minutes
  • 3. Regenerant Refill (in service with treated water): 0.1-99.0 minutes
  • 4. Service

Flow rates

• Service: 129 lpm (7.7 m³/h) (34 gpm) @ 15 psi / 1 bar drop (includes meter).
• Backwash: 121 lpm (7.3 m³/h) (32 gpm) @ 25 psi / 1.7 bar drop (acquired by use of external drain line flow control).
  • Tank size calculation @ 10 gpm of backwash per square foot of bed area / 407 lpm per m² of bed area.

Meter specifications

• Accuracy: ± 5%
• Flow Rate Range: 0.95 - 129 lpm
• Volume Range: 0.02 - 5,700 m³
• Totalizer: 0.001 - 9,999,000 m³

Electrical specifications

• AC Adapter:
  • Supply Voltage: 120V AC (US) / 230V AC (International)
  • Supply Frequency: 60 Hz (US) / 50 Hz (International)
  • Output Voltage: 12V AC
  • Output Current: 500 mA

Mechanical / hydraulic

• Inlet/Outlet Fittings: ¾" to 1.5” NPS
• Cycles: Up to 6
• Valve Material: Noryl® or equivalent
• Regeneration: Downflow
• Distributor Pilot: 1.32" OD Pipe (1" NPS) or 32mm OD
• Drain Line: ¾” or 1” NPT
• Brine Line: 3/8” or ½” OD Poly Tube
• Mounting Base: 2 ½” - 8 NPSM
• Height From Top Of Tank: 7 3/8” (187 mm)
• Weight: 4.5 lbs. (2 kg)

Tank applications

• Water Softener: 6” - 21” Diameter
• Water Filter: 6” - 24” Diameter

---

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