Clack WS2EI/QC Control Valve

Product Description

Clack introduced its first line of residential control valves. The goal was to design a family of control valves for the water treatment professional that covered the greatest range of applications, while having the greatest commonality of parts. All Clack valves incorporate patented* “stack technology” and feature state-of-the-art electronics and programming software.

Water Specialist 2" EI/QC Control Specifications
Inlet/Outlet Fittings 2” Female BSPT or NPT
Cycles  up to 6
Valve Material  Lead free brass
Regeneration downflow
Flow Rate
Service @15 psi drop (includes bypass and meter) 473 lpm (28.4 m³/h) (125 gpm)
Backwash @ 25 psi drop (includes bypass) 322 lpm (19.3 m³/h) (85 gpm)
Cv Service 32.2
Cv Backwash . 17
Operating Pressures
Minimum/Maximum 20 psi – 125 psi
Operating Temperatures
Minimum/Maximum 40° – 110° F
Accuracy ± 5%
Flow Rate Range. 5.7 - 568 lpm (1.5 - 150 gpm)
Gallon Range 0.02 - 5,700 m³
Totalizer 0.001 - 4,294,000 m3 .26 - 1,134,355,000 gallons)
Dimensions & Weight
Distributor Pilot 2.375” OD (2" NPS)
Drain Line 1.5” Female NPT
Brine Line 1” Male NPT elbow,
¾” x 1” solvent weld elbow and
½" OD Poly Tube Compression
Mounting Base 4" - 8 UN
Height From Top Of Tank 11.2"
Weight 30 Lbs.
Electrical Specifications
Supply Voltage 120V AC
Supply Frequency 60 Hz
Output Voltage 12V AC
Output Current 500 mA
Tank Applications
Water Softener 12” – 48” diameter
Water Filter (2) 12” – 36” diameter
Cycles of Operation (Softener / Filter downflow)
1. Backwash 1st 1-95
2.Regenerate Draw/Slow Rinse (downflow) 1-180
3.Backwash 2nd (upflow) 1- 95
4.Fast Rinse (downflow) 1-95
5.Regenerant Refill 0.1-99.0
6.Service (downflow)  
  • 2” top mount or side mount control valve suited for commercial/industrial applications 
  • Epoxy coated lead free brass valve body* 
  • Economical stainless steel optional meter assembly 
  • Service flow rate of 473 lpm (28.4 m³/h) (125 gpm), backwash 322 lpm (19.3 m³/h) (85 gpm) 
  • Solid state microprocessor with easy access front panel settings 
  • Front panel display for time of day, days until next regeneration, volume remaining, current flow rate and total volume used (Totalizer) 
  • Four methods to initiate regeneration; meter immediate, meter delayed, time clock delayed or pressure differential 
  • Optional double backwash feature offers optimum regeneration, cleaning ability and efficiency 
  • Fully adjustable cycle times with 6-cycle control delivers controlled backwash, downflow brining or upflow brining, slow rinse, second backwash, fast rinse, refill and downflow service 
  • Coin Cell Lithium battery back-up with an 8 hour carry over 
  • 12-volt output AC Adapter provides safe and easy installation 
  • Post treated water regenerant refill 
  • 24 Hour Clock 
  • Reliable and proven DC drive 
  • Patented one piece expanding seal spacer stack assembly U.S. Patent 6,402,944 
  • Patented linearly reciprocating piston operation U.S. Patent 6,444,127
  • Commercial/Industrial applications
[custom-documents] [/custom-documents]
(1 review) Write a Review
  • 5
    Awesome engineering!

    Posted by Manuel S. on Jan 11th 2018

    Never failed in removing all harmful contaminants from my water supply

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