Fobrite F21 Series Valve

F21 Specification

Flow rate (50PSI/3.5Bar,Valve alone)

Continuous(15PSI/1Bar Drop)

51GPM/193LPM

Peak(25PSI/1.7Bar Drop)

66GPM/250LPM

Max backwash(25PSI/1.7Bar Drop)

49GPM/185LPM

CV(1PSI/0.07Bar Drop)

13.2

Regeneration

Downflow / Upflow

Downflow only

Cycles

5

Adjustable cycles

Mechanical

NXT

All

All

Time Available

164Minutes

0-999minutes/cycle

Flow Meter

Accuracy range

1.5-75GPM/5.7-284LPM±5%

Capacity range

Standard:625-10125G/2.5-40m3

Extended:3125-53125 G/12-200m3

Mounting &Shipping

Inlet/Outlet

1-1/2”NPT

Base

4”-8 8UN

Distributor Pilot

1.96”OD

Drain Line

1” NPT

Brine Line

1/2”OD

Height from top of tank

7-1/2”/190mm

Weight(Single valve gross)

Timer 10Kg/Meter 12.5Kg

F21 NXT system Specification

System

Valve Qty

Valve

Needed

Meter

Function

4#

Single valve

1

Time

N/A

Regeneration by set time

Meter Imm

1

Regeneration immediately when meter zeros out

Meter Delayed

1

Regeneration delayed to the set time after meter zeros out

Remote Signal Start

Optional

Regeneration starts by remote signal

5#

Interlock

2-4

Meter Imm

All Meters

All units in service at the same time. When one meter zeros out or receives a remote signal, that unit starts regeneration. Other units remain in service even if they zero out during this time.

Remote signal Start

Optional

6#

Series

2-4

Meter Imm

1

All units in service at the same time. When system meter zeros out or receives remote start signal, the “lead“ unit regenerates, others remain in service until the lead returns to service. The subsequent units regenerate as needed.

Remote signal Start

Optional

7#

Alternating

2

Meter Imm

1

One unit in service, the other one on stand-by. When meter zeros out or receives the remote start signal, the service one goes to regeneration and the stand-by one goes to service at the same time.

Remote signal Start

Optional

9#

Alternating

2-4

Meter Imm

All Meters

One unit on stand-by, all units in service. When one meter zeros out or receives the remote start signal ,it goes to regeneration and the stand-by one goes to service at the same time.

Remote signal Start

Optional