LFD30-2 Datasheet, PDF (2/2 Pages) Systemsensor advanced ideas. – Low Flow Rate Waterflow Detectors

Engineering Specification
Low flow rate vane-type waterflow detector with solid state retard shall be an Accuflow model number ____________________
manufactured by System Sensor, and shall be installed on system piping as designated on the drawing and/or as specified
herein. Detectors shall mount on a stainless steel clear pipe span of the appropriate nominal size, either on a vertical upflow
of horizontal run, at least 6” from any fittings which may change water direction, flow rate, or pipe diameter, or no closer
than 24” from a valve or drain. Detectors shall be compatible with 2” through 4” diameter stainless steel and brass pipe.
Detectors shall have a sensitivity of 3 gallons (11.35 liters) per minute minimum and a static pressure of 450 psi for 2” – 4”
diameter pipes. The detector shall respond to water flow in the specified direction after a preset time delay. The delay mech-
anism shall be a solid state unit which is field-adjustable via a dipswitch. The detector’s actuation mechanism shall include a
polyethylene vane inserted through a hole in the pipe and connected by a mechanical linkage to the delay mechanism.
Outputs shall consist of one SPDT switch (Form C contact) and one SPST switch (normally open contact) for wiring to an
alarm panel or addressable control module and local bell and/or notification device. Two conduit entrances (one knockout
type) for standard fittings of commonly used electrical conduit shall be provided on the detectors. A grounding provision shall
be provided. Unless noted, enclosures shall be NEMA 4 listed by Underwriters Laboratories, Inc. for indoor or outdoor use.
Standard Specifications
Static Pressure Rating
450 PSI
Triggering Threshold Bandwidth (Flow Rate)
3 GPM (11.35 liters/minute)
Maximum Surge
18 Feet Per Second (FPS)
Compatible Pipe
Stainless steel and brass water pipe,
2” through 4” (refer to Ordering Information
below)
Overall Dimensions Installed
3.75″
3.0″
U bolt nut
Pipe saddle
U bolt
1.6″
Width: See Table
Pipe
Plastic vane
Model Number
LFD20
LFD25-73MM
LFD25-76MM
LFD30-2
LFD40
Width
4.6″
4.6″
4.6″
5.2″
5.7″
Contact Ratings
One SPDT (Form C)
One SPST (normally open)
0.6 A @ 125 VAC
2.0 A @ 30 VDC
Voltage Range
8.4-35V (DC-FWR)
108-132 VAC
Current Draw
300 microamps @ 12/24 V(DC-FWR)
400 microamps @ 120 VAC
Conduit Entrances
Two openings for 1/2” conduit, one open, one
knock-out type
Operating Temperature Range
32°F - 120°F (0°C to 49°C)
Enclosure Rating
NEMA 4 - suitable for indoor/outdoor use
Cover Tamper Switch
Optional, part no. 546-9000
Shipping Weight
LFD20:
LFD25-73MM:
AFD25-76MM:
LFD30-2:
LFD40:
4.1 lbs. (1.8 kg)
4.2 lbs. (1.9 kg)
4.2 lbs. (2.0 kg)
4.4 lbs. (2.1 kg)
5.1 lbs. (2.3 kg)
Service Use
Water mist systems where low flow detection
is required.
Warranty
3 years
U.S. Patent No.
6,084,521
Ordering Information
Model Numbers
LFD20
LFD25-73MM
LFD25-76MM
LFD30-2
LFD40
Nominal Pipe O.D. and Wall Thickness
2” (60.3 mm OD), 3.9 mm to 4.5 mm
2-1/2” (73.0 mm OD), 4.8 mm to 5.2 mm
2-1/2” (76.1 mm OD), 4.3 mm to 4.7 mm
3” (88.9 mm OD), 5.0 mm to 5.6 mm
4” (114.3 mm OD), 5.4 mm to 6.4 mm
Hole Size
1-1/4"
1-1/4"
1-1/4"
2”
2"
Replacement Part Number
546-9000
WFDW
WFDN4
Description
Cover tamper switch kit
Tamper proof wrench for cover
Gasket kit
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System Sensor Headquarters
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St. Charles, IL 60174
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Fx: 630/377-6495
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© 2000 System Sensor. The company reserves the right to change product specifications without notice.
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A05-0290-000•9/00(5K)•#660