2025 Nelsen Corporation Catalog - Catalog - Page 90
3 Nelsen Water Solutions 2" Backwash Only Filters
Filtration Equipment - Commercial
NWS 2" Backwash Only Filters (Less Media)
Includes the NWS20 2" control valve, mineral tank, commercial distributor, and gravel bed.
Choose filter media separately from Section 4.
NWS20-AF16
16" x 65" Backwash Only Filter
NWS20-AF18
18" x 65" Backwash Only Filter
NWS20-AF21
21" x 62" Backwash Only Filter
NWS20-AF24
24" x 72" Backwash Only Filter
NWS20-AF30
30" x 72" Backwash Only Filter
NWS20 CONTROL
CONTROL VALVE FEATURES
• 2" Top 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 115 gpm, backwash 80 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)
• Coin Cell Lithium battery back-up with an 8 hour carry over
• Level VI 15-volt output DC power supply provides safe and easy installation
• 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
• Fully adjustable cycle sequences and times
NELSEN WATER SOLUTIONS 2" CONTROL
Mineral Tank Size
16 x 65
18 x 65
21 X 62
24 X 72
30 X 72
Maximum Flow Rate, System - 70 gpm
Maximum Backwash Rate, System - 52 gpm
FLOW RATES* - Gallons Per Minute
SVC
BKW
SVC
BKW
SVC
BKW
SVC
BKW
SVC
BKW
Greensand Plus
8.5
15.0
10.5
20.0
14.5
25.0
18.0
35.0
30.0
55.0
Birm
4.5
13.0
7.0
15.0
9.5
25.0
11.0
35.0
17.0
55.0
Activated Carbon
4.5
13.0
7.0
15.0
9.5
25.0
11.0
30.0
17.0
50.0
Calcite/Corosex
7.0
15.0
8.5
20.0
12.0
25.0
10.0
35.0
15.0
55.0
Multi-Media
4.0
20.0
5.0
25.0
7.0
35.0
9.5
50.0
15.0
75.0
Filter Ag Plus
14.0
20.0
17.0
25.0
24.0
35.0
22.0
50.0
X
X
Filter Sand
4.0
20.0
5.0
25.0
7.0
35.0
9.5
50.0
15.0
75.0
Katalox
11.0
15.0
14.0
25.0
19.0
30.0
19.0
35.0
30.0
60.0
SYSTEM SPECIFICATIONS
Mineral Tank Size
16 x 65
18 x 65
21 x 62
24 x 72
30 x 72
Pipe Size
1-1/2"
1-1/2"
1-1/2"
1-1/2"
1-1/2"
Drain Pipe Size
3/4"
3/4"
3/4"
3/4"
3/4"
Distributor Piliot
1-1/2"
1-1/2"
1-1/2"
1-1/2"
1-1/2"
Tank Thread
4" - 8
4" - 8
4" - 8
4" - 8
6" Flange
Overall Height, Inches
74
75
75
82
90
*NOTE - due to varying water conditions, water pressures, and assembly materials, service flow rate should be used as a guideline only.
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For more information visit – NelsenCorp.com • NelsenWaterSolutions.com • VESTAwater.com
All prices and products subject to change without notice. ©Nelsen Corporation
