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Key Features |
| Controls
excessive flows |
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| Applications |
| Fitting
Failure Regulator failure Hydraulic control
Gas Analyzers Toxic Gas and Liquid Releases
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| Features |
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Controlled
Bleed, Resets Automatically |
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Field
Adjustable |
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Positive
Shut-off |
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Attitude
Variable Mounting |
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Function:
Restricts or Shuts Off Flow |
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Output:
switch contact optional |
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Materials:
316ss or Brass Body |
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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.
In this auto reset model after actuation, the piston
rests on a metal to metal seat which allows a controlled
bleed. To reset the unit, pressure must be equalized
on both sides of the piston. If the source is turned
off, either upstream or downstream, the bleed will
equalize the pressure and the valve will automatically
reopen by magnetic repulsion from the fixed magnet
located in the valve body.
For positive shut-off an elastomer is used on the
nose of the piston. When it comes to rest on the seat
it provides a bubble tight closure. To reopen the
valve there are two options.
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The
upstream pipeline must be bled to atmosphere
if the line downstream is at atmosphere. |
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A
by-pass line with an on/off valve must be installed
to port the upstream pressure to the downstream
pipeline to equalize the pressure. |
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| Our
MRS series is available with the by-pass system
as an integral part of the unit. |
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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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| Brass |
1500
(103.42) |
Brass,
Epoxy, Delrin ** |
Viton® |
316ss |
3000
(206.84) |
316ss,
Epoxy |
Viton® |
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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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 Call - (800) 576- 6308
or
 Mail for assistance
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