Water Softeners Technical Specification

Gold Series Water Softeners Technical Specification

More Efficient Compact Design

Small or Big Water Softeners which is more efficent:-

With the Introduction of EWT Gold Series microprocessing sophisticated controls, we have designed some of our Gold Series water softeners to be more compact making them more suitable for homes in England (i.e enabling them to be installed inside protected from frost damage etc) we have re-engineered them so that they can be regenerated when needed, we have also taken great strides in making our units more efficient on salt usage, eliminating what was formerly a 25 to 50 percent waste of brine per regeneration. Finally, these Gold Series compact, efficient units use considerably less water (up-to 70%) water per regeneration per cleaning cycle, and waste only the necessary number of litres. These advances have come about through EWT's continued commitment to research and innovations, but also have be driven by environmental issues and local water conservation requlations.
EWT Gold610 Countercurrent Flow
In this mode of operation, know as countercurrent, the service flow and the brining flow are in the opposite directions that is softening downward through the cation resin and brining upward through the bed. Often called up-flow brining, this method offers several benefits. In this mode, the strong, less diluted brine solution immediately contacts the lower portion of the resin bed for maximum recharging. Depending upon salt dosage level and the corresponding water hardness, the degree of resin bed recharging will vary. However, the counter-flow brining method is especially effective in low salt dosage 3-5lbs demand-regenerated units, because the bottom bed zone is always in the most fully regenerated sodium (Na) or potassium (K) form. In this countercurrent mode, when the softener returns to service flow, the water leaving the softener tank passes through the most highly regenerated region of resin last, assuring maximum softening with relatively little hardness leakage.
EWT Gold Series 610 IQ “Packed-Bed” Fine-Mesh Resin Softeners
To answer the need for water conservation EWT Gold Series 610 Model is designed to closely limit the total litres of water used per regeneration per cycle. The EWT Gold 610 water softener features:-
  1. Fully “packed bed” (tank)
  2. IQ Fine-mesh cation resin
  3. Smaller tank diameters to achieve better distribution of water and brine flows
  4. Shallower bed of resin, 17”
  5. Countercurrent regeneration
 These five features, combined with valving control devices that call for regeneration based upon the consumption of water also lead to higher salt efficiency. Without the freshwater zone (freeboard) to displace the long rinsing steps, these newer softeners can be regenerated with as little as 34 liters of water in compact softener systems. In larger systems, up to two cubic feet of resin can be regenerated with as little as 151 litres of water. This packed-bed design can save from 30 to 75 percent of total water used compared to conventional freeboard design systems. These compact packed-bed softeners are achieving efficiencies of 4000 grains of hardness removal per pound of salt or better, with very low hardness leakage, on influent waters of less then 30 grains (513 ppm) per gallon total hardness.
EWT's IQ Fine-mesh resin products have a somewhat greater exposed surface area, which provides higher potential capacity per cubic foot. Since the exchange sites are more fully exposed, the chemical reactions of softening and brine regeneration take place more rapidly, or at a higher “kinetic” rate. With more exchange sites available, less of the water and brine needs to diffuse into the bed proper to find an exchange site.

 Industry Leading Performance

Thorough side-by-side testing with competitive products prove that the EWT Water Softener Series control valves and pressure vessels meet or exceed the highest industry performance and reliability standards. Familiar piston, seal and spacer technology and unique features such as time saving quick connect fittings on the bypass and drain line and integrated meter in the bypass were designed with the Independent Water Dealer in mind.

EWT Series control valves meet or exceed competitive performance in all four key performance measures:

1) Service Flow Rate,
2) Back Wash Flow Rate,
3) Burst Pressure and
4) Cycle Testing.

MFGR (0-150psi) Pass/Fail
EWT 100,000+ Pass
5600 100,000+ Pass
F20 100,000+ Pass


All materials used in EWT valves meet strict guidelines to insure reliability, performance, and safety.

Lab Testing

In addition to stringent incoming inspection requirements for all parts and materials, many key items are tested in our certified laboratory using state of the art equipment.

As an example, all metals (brass, stainless, copper) are tested for lead content. Plastic materials are tested for contamination

Part Description Comments
Valve Piston, Piston Rod, Brine Piston Less than 0.6% lead (lead Free)
Teflon Coating FDA Approved
Seals NSF Approved
Body, Spacers, Couplings, Meter, etc.. NSF Approved
Meter Impeller NSF Approved

Reliability Testing

The test was developed to evaluate the performance of the valve over 5,000 regeneration cycles. This is equal to over 40 years of service life!

Key valve performance factors evaluated every 800 cycles during the test are:
  • Piston wear
  • Seal Wear
  • Gear Wear
  • External leakage
  • Internal Leakage (i.e. leak to drain while in brine re-fill position or service position)
  • Timing and sequence of regeneration cycles
  • Piston drive force

Piston Drive Force

Precision tolerances and high quality materials in the EWT valve insure high quality performance and extreme reliability.

Drive Force Test
After 5,000 regeneration cycles (equal to 40 years!) EWT valves still required a lower drive force compared to Fleck.
This insures a long life expectancy of the drive gears and motor.

Piston Wear

Even after 5,000 cycles there is hardly any evidence of wear on the piston.
The Teflon surface is scuffed but still completely coats the brass piston.

Seal Wear

After 5,000 cycles there is only minor wear on the seals.  There are no internal or external leaks in any valve position.

A small amount of wear is evident on the outer lobes of the seals.

Drive Gears

After 5,000 cycles, the drive gear teeth do not show any evidence of wear or damage.

  1. Idler Gear
  2. Drive Gear
  3. Brine Cam
  4. Main Drive Gear
The only real visible area of wear is on the brine cam from the brine piston.

Pressure Testing

EWT valves are designed to withstand higher pressures than other competitive valves.

Burst Test

EWT valves can hold up to 700 psi which is 200 psi more than the NSF standard.

Pressure Cycle Test

EWT valves surpass the NSF standard of 100,000 pressure cycles from 0-150 psi.

MFGR (0-150psi) Pass/Fail
EWT 100,000+ Pass
5600 100,000+ Pass
F20 100,000+ Pass

Valves are selected from each production lot for burst testing and pressure cycle testing to insure this standard is maintained. In production, every valve is 100% leak tested.

Flow Testing

Design improvements resulted in the EWT valve having higher service and back wash flow rates

Optimized Design

The valve body structure and the piston channels were modified to improve the flow rate in the service and back wash position.

In production, 100% of all valves are tested for full service and back wash flow rates.

Back Wash

EWT valves provide softener and filter systems with consistent back wash flow rates over a wide range of operating pressures.

Optimized Design

As inlet water pressure increases, the EWT back wash button opening actually closes to provide a consistent back wash flow rate

Brine Draw & Rinse Efficiency

EWT valves perform equally to a 5600 valve in brine draw and slow rinse.

Optimized Design

Each size of injectors and nozzles in the EWT valves perform as well as the 5600 valves

In production, every valve is
100% tested to insure the
injectors are drawing a proper

Valve Performance Summary

EWT valves meet or exceed North American levels of quality, performance, and reliability in every category. Please see all our certs below.

Category Meet Exceed
Materials X  
Reliability   X
Pressure Testing   X
Flow Performance                  X