Bulletin E-71
Specifications - Installation and Operating Instructions
Vane Operated Flow Switch
3-11/32
[84.93]
2-1/2
[63.5]
8
[203.2]
6-3/4
[171.45]
4-11/16
[119.06]
1 [25.4]
U.L. AND C.S.A. TYPE
INCLUDES 16 GA.
LEADS, 6 [152.4] LONG.
CENELEC VERSION
INCLUDES TERMINAL
BLOCK.
EXPLOSION-PROOF
HOUSING WITH 3/4
[19.05] CONDUIT
CONNECTION
SWITCH BODY OF SAE
72 BRASS OR 316SS
STAINLESS STEEL
1-1/2 NPT
MAGNET KEEPER 430
STAINLESS STEEL
VANE AND VANE BLOCK
316 STAINLESS STEEL
FIVE LAYER VANE
DESIGNED FOR 1-1/2
[38.1] TO 8 [203.2]
PIPES. USABLE IN
LARGER SIZES.
SPECIFICATIONS
Service:
Gases or liquids compatible with wetted materials.
Wetted Materials:
Vane:
316 SS
Body:
Brass or 316 SS standard.
Magnet Keeper:
430 SS standard, 316 SS optional.
Options:
Other materials also available, consult factory
(e.g. PVC, Hastelloy, Nickel, Monel, Titanium).
Temperature Limit:
-4 to 275°F (-20 to 135°C) standard, MT
high temperature option 400°F (205°C) [MT option not UL, CSA,
ATEX, or SAA].
Pressure Limit:
Brass body 1000 psig (69 bar), 316 SS body
2000 psig (138 bar), optional 5000 psig (345 bar) available with
316 SS body and SPDT switch only.
Enclosure Rating:
Weatherproof and Explosion-proof. Listed
with UL and CSA for Class I, Groups C and D; Class II, Groups E,
F, and G. ATEX 0344 II 2 G EEx d IIB T6 -20°C
)
Tamb
)
75°C
EC-Type Certificate No.: KEMA 03ATEX 2383
SAA: Exd II C T6 (T amb=60°C).
Zone I. Also FM approved.
Switch Type:
SPDT snap switch standard, DPDT snap switch
optional.
Electrical Rating:
UL, FM, ATEX and SAA models 10A @
125/250 VAC (V~). CSA models: 5A @ 125/250 VAC (V~); 5A res.,
3A ind. @ 30 VDC (V ). MV option: 1A @125 VAC (V~); 1A res.,
.5A ind. @ 30 VDC (V ). MT option: 5A @ 125/250 VAC (V~). [MT
and MV option not UL, CSA, FM, ATEX or SAA].
Electrical Connections:
UL and CSA models: 16 AWG, 6˝ (152
mm) long. ATEX and SAA unit: Terminal block.
Conduit Connection:
3/4˝ female NPT.
Process Connection:
1-1/2˝ male NPT.
Mounting Orientation:
Within 5° of vertical for proper operation.
Units for horizontal installation (vertical pipe with up flow) available.
Set Point Adjustment:
For universal vane: five vane
combinations.
Weight:
4 lb 8 oz (1.9 kg).
Series
V4
Rugged and reliable the Flotect
®
V4 flow switch
operates
automatically to protect equipment and pipeline systems against
damage from reduction or loss of flow. The V4 is time tested being
installed in thousands of pipelines and processing plants around
the world. A unique magnetically actuated switching design gives
superior performance. There are no bellows, springs, or seals to
fail. Instead, a free-swinging vane attracts a magnet within the solid
metal switch body, actuating a snap switch by means of a simple
lever arm.
FEATURES
• Leak proof body machined from bar stock
• Choice of custom vane calibrated for your application, Model V4,
or field adjustable multilayer vane, Model V4-2-U (see set point
chart on page 4)
• Weatherproof, designed to meet NEMA 4
• Explosion-proof (listing included in specifications)
• Installs directly and easily into pipeline with a thredolet, tee, or
flange (see application drawings on page 4)
• Can be used in pipes 1-1/2˝ and up
• Electrical assembly can be easily replaced without removing the
unit from installation so that the process does not have to be shut
down
• High pressure rating of 1000 psig (69 bar) with the brass body
and 2000 psig (138 bar) with the 316 SS body
APPLICATIONS
• Protects pumps, motors and other equipment
against low or no flow
• Controls sequential operation of pumps
• Automatically starts auxiliary pumps and engines
• Stops liquid cooled engines, machines and processing when
coolant flow is interrupted
• Shuts down burner when air flow through heating coil fails
• Controls dampers according to flow
Notes:
• Check all ratings given in the instructions and on the product to
make sure that the product is suitable for your application. Do
not exceed electrical ratings, pressure ratings, or temperature
ratings of the product.
• Disconnect power supply before beginning installation to prevent
possible equipment damage or electrical shock.
MAINTENANCE
Inspect and clean wetted parts at regular intervals. The cover
should be in place at all times to protect the internal components
from dirt, dust, and weather, and to maintain hazardous location
ratings. Disconnect device from the supply circuit before opening
to prevent ignition of hazardous atmosphere.
Northeast Controls Incorporated
Tel: 845-986-8546 | Fax: 845-810-7625
Northeast Controls Incorporated
Tel: 845-986-8546 | Fax: 845-810-7625
www.dwyerstore.com
