Series1000-2000Flo-Gard Switch
Clark Solutions
Series 1000 & 2000 FLO-GARD™ Inline Flow Switches
Differential Pressure Orifice Type, Liquids & Gases

DESCRIPTION
FLO-GARD™ flow switches provide economical solutions for equipment protection and automation.

All FLO-GARD™ flow switches provide high reliability design with no paddles or small flow paths to plug or stick. Switches are suitable for measuring oil and water containing contaminates. Switches may also be selected for gases and steam.

A wide range of sizes and materials provides optimal selection. Choose one or two field adjustable switch set points from 0.5 gallons per hour (1/2”) to 3000 GPM (8”). All switches are independently adjustable from 15% to 100% of range.

A maintenance-free design, FLO-GARD™ flow switches operate on the differential pressure principle (bellows sensors) and have no bearing or sliding surfaces to corrode and stick. Normal maintenance is NOT required.

The switches have a low installation cost. FLO-GARD™ flow switches include a terminal strip and splash-proof junction box for making field connections, eliminating the cost of providing a field junction box.
SPECIFICATIONS
Pressure: max. 400 psig (28.1 kg/cm 2)
Temperature: max. 212°F (100°C); optional 350°F
        (177°C)
Temperature: min. -30°F (-34°C); optional -80°F
        (-62°C)
        Protect from freezing liquids
Pressure drop: 5 psig at max flow 1.2 psig at 50%
        of max flow
Mounting: NPT threaded (series 1000) or Wafer
        style (series 2000) for mounting between any
        150 or 300 class flanges or international
        equivalent
REED SWITCHES
Setability: ±5% F.S.
Repeatability: ±1% F.S.
Hysteresis: 7 to 13% F.S
Contact Rating: 3 watts
Voltage: 100 vdc - max.
Current: 250mA max. switching
    1.0 Amp max. carry
Housing: Aluminum
               Polyester coated
Pressure Cell: Aluminum, hard anodized
Body: Bronze ,316 SS
Bellows: Bronze, 316 SS, Inconel (high pressure)
Dimensions
Pipe Size A B
in mm in mm in mm
0.5 15 4.85 123 1.69 43
.075 20 5.29 134 2.00 51
1.0 25 5.48 139 2.38 60
1.5 40 6.04 153 3.12 79
2.0 50 6.23 158 3.75 95
2.5 65 6.73 171 4.25 108
3.0 80 7.10 180 5.0 127
4.0 100 8.17 207 6.13 156
5.0 125 8.57 217 7.38 187
6.0 150 9.29 235 8.38 213
8.0 200 10.54 267 10.38 264
Dimensions Series 1000
Pipe Size A B C D
in mm in mm in mm in mm in mm
0.25 0.08 3.46 88 3.06 78 1.06 27 1.06 27
0.5 15 3.46 88 3.06 78 1.06 27 1.06 27
0.75 20 4.18 106 3.06 78 1.50 38 1.25 32
1.0 25 4.30 109 3.06 78 1.75 44 1.50 38
1.5 40 4.68 119 3.06 78 2.50 64 2.12 54
2.0 50 5.05 128 3.19 81 3.19 81 2.75 70
3.0 80 5.74 146 4.19 106 4.62 117 4.00 102
FLOW SELECTION CHARTS
Pipe Size- Inches, mm Maximum Flow Range
1/4 1/2 3/4 1 1 1/2 2 liquid gas steam
08 15 20 25 40 50 GPM l/m SCFM NM3/h #/h
• •         2 8 10 15 40
• •         3 10 20 30 60
• •         4 15 30 50 80
  • •       6 25 40 80 120
  • •       10 40 60 100 200
    •  •      15 60 100 250 300
    • •     20 80 200 400 400
      • •   30 120 300 500 600
      • • • 40 150 400 600 800
        • • 60 240 600 1000 1000
        • • 100 400 800 1200 2000
          • 150 600 1000 1500 300
          • 200 800 1200 2000 4000


Pipe Size- Inches, mm Maximum Flow Range
2 1/2 3 4 5 6 8 liquid gas steam
65 80 100 125 150 200 GPM l/m SCFM NM3/h #/h
•           60 240 600 1000 1000
•           100 400 800 1200 2000
•           150 600 1000 1500 3000
• •         200 800 1200 2000 4000
  • • •     300 1000 1500 50 6000
  • • •     400 1500 3000 100 8000
  •         500 2000 4000 100 10000
    • • • • 600 2400 5000 150 15000
    • • •   800 3000 6000 200 21000
        • • 1000 4000 8000 250 40000
        • • 2000 8000 15000 400 40000
          • 3000 12000 20000 600 60000

Female threaded connections available 1/4 to 2” and 3”
(.08 mm to 50 mm & 80 mm)
Flanged (wafer) connections available 1/2” to 8” (15 mm to 200 mm)
Metric threads are not available in stainless steel

Useful Range All Units of Measurement
Min. Max.
0.2 1
0.3 2
0.4 3
0.5 4
0.5 6
1.0 8
1.5 10
2 15
3 20
3 25
4 30
6 50
5 60
10 80
15 100
15 120
20 150
30 200
30 240
30 250
40 300
50 400
50 600
100 800
150 1000
200 1500
300 2000
400 3000
Example: A meter with a max flow range of 100 has a useful range from 15 to 100.

Optional Low Flow Rates (Option ES)
Size Maximum Flow Range
liquid gas steam
in mm GPH l/h cc/m SCFH Nm3/h
1/2 15 4 15 200 40 1
1/2 15 6 20 300 60 2
1/2 15 10 40 400 100 3
1/2 15 15 60 600 150 4
1/2 15 20 80 1000 200 6
1/2 15 30 120 2000 300 8
1/2 15 40 150 3000 400 10
1/2 15 60 240 4000    
1/2 15 100 400 6000    

ORDERING INFORMATION
EXAMPLE 2-1NPT-1-20GPM-BN-1S2
WATER, MAX TEMP 125°F, MAX PRESSURE 150 PSIG

PLEASE CALL 1-800-253-2497 TO ORDER THESE ITEMS
1) Specify Pipe Size- See above Tables
2) Specify Connection- 1NPT= Series 1000, NPT connection
1M= Series 1000, FBSP Parallel Threads
2= Series 2000, Flange connection
3) Specify Body & Bellows Material- 1= Bronze
3= Stainless Steel
4) Specify Maximum Flow Range from tables and Flow Units (GPM ,l/m, SCFM etc.)
5) Specify Options- See Seals & Options
6) Specify Switch Quantity- 1S2= one SPDT switch
2S2= two SPDT switches
7) Please advise us of the media, max pressure and max temperature that the switch will see.
Seals & Options A Viton™ Seals
BN Buna (Standard) Seals
B EPR Seals
B2  TFE Seals
ES  Low Flow Rate (below 2 GPM)
I Compressed Gas Service (specify gas, temp. & pressure)
K Steam Service (max. 120 psig)
T Expanded Temp. Range (-80 to 350°F), includes option A; consult factory for higher temperatures



For assistance call 978-568-3400
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