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Key Features |
| Positive shut off with internal reset mechanism |
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| Applications |
| Plant Lines
Regulator Failure
Fitting Failure
Toxic Gases and Liquids
Gas distribution systems
Gas Analyzers
Loss Control
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| Features |
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Field Adjustable |
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Resets Manually |
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Materials: 316ss or Brass Body Standard |
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Detects Excess Flows |
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Detects an Increase in Viscosity of Media |
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Function: Shuts Off Flow |
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Output: Switch Contact (Optional) |
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| Operation |
Flow enters the unit and makes a right angle to the outlet port across the nose of a magnetic piston. The piston is held in place by attraction to an adjusting screw magnet. A pressure differential is created by flow across the piston. When the differential is great enough, the piston slides to a seat at the outlet port. The flow rate at which the piston actuates can be changed externally by turning the adjusting screw, thereby changing the piston's relationship with the flow stream.
The piston makes a bubble tight seal when it comes in contact with the seat. To reopen the unit, turn the balancing valve handle on the side. This ports the upstream pipeline to the downstream pipeline. When the pressure is equalized on each side of the piston, it will reset. The unit is returned to normal operation by closing the balancing valve.
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Actuation
points for air at 68 F and 15 PSIG |
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Corrections
must be used for other gases, line pressures
and temperatures. |
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Please
consult your representative or the factory. |
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| Calibration
Range |
| MODEL |
Adjustable
Range Air SLPM (SCFM) |
Adjustable
Range Water LPM (GPM) |
Port
Size FNPT |
EFV-125 |
0.5 to 155.70
(0.018 to 5.5) |
0.015 to 4.5
(0.004 to 1.2 |
1/8" |
EFV-250 |
4 to 1132
(0.14 to 40) |
0.100 to 15.1
(0.026 to 4.0) |
1/4" |
EFV-375 |
85 to 1840
(3.0 to 65) |
0.380 to 15.1
(0.100 to 4.0) |
3/8" |
EFV-500 |
142 to 2123
(5.0 to 75) |
1.90 to 37.8
(0.50 to 10.0) |
1/2" |
| EFV-750 |
425 to 3681
(15.0 to 130) |
3.80 to 75.7 (1.0 to 20.0) |
3/4" |
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| PRESSURE
LOSS TABLE |
| Model |
Set
Point |
DP
to Atmosphere
BARD (PSID) |
Air
SLPM (SCFM) |
Water
OPM (GPM) |
| EFV-125 |
0.5
(0.018)
75 (2.63)
155.7 (5.5) |
0.015
(0.004)
2.65 (0.70)
4.50 (1.20) |
0.08
(1.2)
0.11 (1.6)
0.21 (3.0) |
| EFV-250 |
4
(0.14)
500 (17.50)
1132 (39.62) |
0.1
(0.26)
5.0 (1.32)
15.1 (3.99) |
0.21
(3.0)
0.41 (6.0)
0.83 (12.0) |
| EFV-375 |
85
(2.98)
900 (31.50)
1840 (64.40) |
0.38
(0.10)
10.0
(2.64)
15.1
(3.99) |
0.10
(1.5)
0.28
(4.0)
0.83
(12.0) |
| EFV-500 |
142
(4.97)
1000 (35.00)
2123 (74.31) |
1.9
(0.50)
25.0 (6.60)
37.8 (9.98) |
0.07
(1.0)
0.28 (4.0)
0.48 (7.0) |
| EFV-750 |
425
(14.88)
1800 (63.00)
3681 (128.84) |
3.8
(1.00)
4.7 (1.24)
75.7 (19.98) |
0.14
(2.0)
0.21 (3.0)
0.34 (5.0) |
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| Switch
Data |
| SPST
Hermetically Sealed
Reed Switch
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| Max Switching Voltage
DC (V) 200
AC (V) 150
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| Contact Rating
DC (W) 50
AC (VA) 70
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| Max. Switching Current
DC (A) 1.0
AC (A) 0.7
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| Leads |
SPST
Leads 18 in. min. from body 22 AWG, TFE insulation. |
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Above values for resistive loads only. For inductive loads, surge current and rush current -- contact protection is required; consult your local representative. |
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Specifications |
|
Unit |
Max.
Working Pressure PSIG (BARG) |
Wetted
Parts |
Seals
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Balancing Valves
Packing |
| Brass |
1500
(103.42) |
Brass,
Epoxy, Delrin ** |
Viton® |
Teflon® |
316ss |
3000
(206.84) |
316ss,
Epoxy |
Viton® |
Teflon® |
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**
Brass Piston in 125 Unit |
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Fluid
Ports: Inlet/Outlet Ports - See Calibration Ranges |
Temperature
Operating Range: 32° to 220° F (0° to 104° C). |
Installation:
The 125, 250 and 375 series can be mounted in any position. The 500 and 750 series can be mounted in any position except with the outlet port down. We suggest the unit be calibrated in the attitude in which it will be installed. An actuation point approximately 3 or 4 times normal flow rate should be chosen to avoid the valve actuating from initial pressurization of the system and normal surges. If flow is kept constant, an actuation point 10% above the normal rate may be used. |
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| MODEL |
WEIGHT
Lbs (Grams) |
DIMENSIONS
Inches (mm) |
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|
A |
B |
C |
D |
E |
| EFV125 |
0.25
(113.4) |
2.5
(64) |
1.00(25) |
0.75
(19) |
0.70
(17) |
0.63
(16) |
| EFV250 |
0.50
(226.8) |
3.3
(84) |
1.50(38) |
1.00
(25) |
1.00
(25) |
1.00
(25)
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| EFV375 |
0.50
(226.8) |
3.3
(84) |
1.50(38) |
1.00
(25) |
1.00
(25) |
1.00
(25) |
| EFV500 |
1.00
(453.6) |
4.0
(102) |
2.00(50) |
1.25
(31) |
1.25
(31) |
1.38
(35)
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| EFV750 |
1.50
(680.4) |
4.9
(124) |
2.25(57) |
1.25
(31) |
1.63
(41) |
1.63
(41) |
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