Dwyer SFI-801 User Manual

Series SFI-800 & SFI-801 Sight Flow Indicator

2-1/2

[63.50]
2-13/16

[71.44]

2-5/16

[58.74]

2

[50.80]

1

/4, 1/2 or

3/4˝ NPT

1-3/32

[27.78]

REMOVAL

CLEARANCE

2

-1/4

[

57.15]
17/32

[13.50]

2-15/16

[

74.61]

1-15/32

[37.30]

(

4) 1/4 DIA [6.35]

HOLE ON 2-1/2 DIA [63.5]

BOLT CIRCLE

2-1/32

[51.59]

P

ANEL

M

OUNT CUTOUT

(4) 13/64 DIA [5.16]

HOLE ON 2-1/2 DIA [63.5]

B

OLT CIRCLE

Specifications - Installation and Operating Instructions

Bulletin F-47

UP

SFI with A-711 Option

The Series SFI-800 Sight Flow Indicator provides protection for
expensive equipment and systems, accommodating fluid temperatures
as high as 212°F (100°C) and pressures up to 150 psi (10.34 bar). This
sight flow indicator is composed entirely of FDA/NSF-ratable materials.
It is exceptionally corrosion-resistant and can handle de-ionized water
and many acids, bases and salts. (Consult B. P. Amoco’s Extensive
“Chemical Guide” for further information on the Udel P1700 Polysulfone
resin).

The Series SFI-801 Sight Flow Indicator is similar to the SFI-800
except it is made of UV stablized materials. It can be used in outdoor
applications where indication of water flow or control is needed. The
materials are not FDA approved.

Three output options are available for the SFI-800 and 801:

The A-711 is a unique, patent pending sensor that outputs two pulse
voltage signals proportional to flow rate. Pulse outputs are a 5 VDC
pulse and a pulse of the input supply voltage used, which can be 8 to 28
VDC. This sensor can be used to monitor flow rate and flow totalization.

The A-712 is a sensor that outputs a linear 1 to 10 VDC signal propor­tional to flow rate. This sensor can be used to monitor flow rate.

The A-713 is a flow switch with open collector outputs. One output is
active above setpoint and the other output is active below setpoint. The
setpoint can be changed by pressing a button at the desired flow rate.

FI Model Only

S

SPECIFICATIONS
Service: Compatible fluids.
Wetted Materials:

Body: SFI-800: Polysulfone, SFI-801: UV Stabilized Polycarbonate;
Window: SFI-800: Polysulfone, SFI-801: UV Stabilized Polycarbonate;
Rotor: SFI-800: White Polysulfone, SFI-801: Red UV Stabilized PBT;
Rotor Pin: 316 SS;
Thrust Washers: 300 Series SS;

O-ring: SFI-800: Fluoroelastomer (NSF Grade), SFI-801:Buna-N.
Temperature Limits: SFI-800: -20 to 212°F (-28 to 100°C); SFI-801: -20
to 130°F (-28 to 55°C).
Pressure Limits: SFI-800: 150 psi (10.34 bar); SFI-801: 125 psi (8.62
bar).

Viscosity Max: 200 SSU.
Weight: SFI-800: 3.35 oz (95 g); SFI-800-A711: 5.0 oz (142 g).

ELECTRICAL SPECIFICATIONS (for A-711 Option Only)
Temperature Limits: -20 to 212°F (-28 to 100°C).
Power Requirements: 8 to 28 VDC.
Output Signal: White lead: 5 VDC. Green lead: 8 to 28 VDC equal to

supply voltage. Pulsed output with frequency rate proportional to flow
rate.

Accuracy: ±5% of F.S.
Frequency Output Range: 0 to 100 Hz.
Electrical Connections: Black lead - Ground; White lead: 5 VDC out

pulse; Green lead: 8 to 28 VDC out pulse; Red lead: 8 to 28 VDC supply.

ELECTRICAL SPECIFICATIONS (for A-712 Option Only)
Temperature Limits: -20 to 212°F (-28 to 100°C).
Power Requirements: 15 to 28 VDC.
Output Signal: White lead: 1 to 10 VDC.
Accuracy: ±5% of F.S.
Electrical Termination: Black lead: Ground; Red lead: 15 to 28 VDC

input; White lead: 1 to 10 VDC output.

W.E. ANDERSON DIV., DWYER INSTRUMENTS, INC.

P.O. BOX 358 • MICHIGAN CITY, INDIANA 46361 U.S. A.

ELECTRICAL SPECIFICATIONS ( for A-713 Option Only)
Temperature Limits: -20 to 212°F (-28 to 100°C).
Power Requirements: 8 to 28 VDC.
Output Signal: White lead: Normally open switch; Green lead: Normally

closed switch. Both open collector, 100 mA max, 28 VDC max.
Electrical Connections: Black lead: Ground; White lead: Normally open;
Green Lead: Normally closed; Red lead: 8 to 28 VDC.

Phone: [phone] www.dwyer-inst.com
Fax: [phone] e-mail: [e-mail]

page 2

INSTALLATION

1. Select an indoor location (SFI-800 only) that is free from excess vibra­tion, within the specified temperature limits, and away from direct sun­light. (SFI-800 is adversely affected by ultraviolet light.)

Note: The SFI-801 is rated for indoor or outdoor use and is not
affected by ultraviolet light.

2. When mounting horizontally, make sure the “belly” of the indicator is
on the bottom. This will prevent entrapped bubbles from collecting and
degrading performance.

3. All Series 800 and 801 units may be panel mounted using the (4) four
holes integrated into the body.

4. Use plumbers tape thread sealant. Do not use pipe dope compounds,
which can craze and crack the polysulfone housing. Hand tighten sys­tem pipe fitting. If additional torque is needed to seal pipe joint, use strap
wrench on fitting.

5. If using solvent-based glues like PVC cement, in the piping system,
do so with the meter’s body removed until glue has cured, then purge
the system before reinstalling. Do not solder brass fittings with the body
installed, because the heat generated to solder the brass fittings will
damage the flowmeter.

6. Incoming flow may be connected to either port. However, for best per­formance a straight section of pipe with a minimum of 10 times the tube
diameter should be used on the inlet side.

MAINTENANCE

With all mechanical type sensing units, a minimal amount of cleaning is
required. However if a 150-micron filter is used, reduced cleaning can be
expected.

The Series SFI-800 Dwyer®Sight Flow Indicator utilizes a patent pend­ing sensing design, no magnets are molded inside the impeller, to attract
ferrous material. This greatly reduces the necessary maintenance when
used in mechanical systems with ferrous residuals. If residuals are found
inside the unit, clean with mild detergent. Inspect for impeller wear. If
impeller vibration is noticeable, or if the unit produces an oscillation
(whirring or buzzing) sound, replace the impeller.

A-711, A-712, or A-713 SENSOR OPTION INSTALLATION

This procedure is for customers who purchased an SFI-800, 801 Sight
Flow Indicator and want to add the A-711, A-712, or A-713 Sensor
Option.

1. Orient the sight flow indicator with the “belly” down. The sensor
“pocket” should be in the 6 o’clock position (as one is facing the unit).

2. Position the A-711, A-712, or A-713 sensor with the wire cable leads
at 3 o’clock and the exposed sensor portion at 6 o’clock.

3. Allow the sensor package to rest on the four (4) tabs on the back of
the sight flow indicator.

4. Firmly and evenly press the sensor onto the back of the sight flow
indicator.

5. The assembly will only go on one way. The sensor is not intended for
removal.

6. Follow electrical installation for lead termination.

ELECTRICAL INSTALLATION (for A-711 Option Only)

1. Connect the RED wire from the sensor to the positive 8 to 28 VDC
power supply output.

2. Connect the BLACK wire from the sensor to the negative or ground
connection of the power supply output.

3. Connect the WHITE wire to get a 5 VDC digital pulse where the fre­quency of the pulse is proportional to the flow rate.

4. Connect the GREEN wire to get an 8 to 28 VDC pulse where the fre­quency of the pulse is proportional to the flow rate. The voltage level will
be equal to the supply voltage (on the RED wire) minus approximately

0.7 volts.

CAUTION: DO NOT Connect the white and green leads together. Any
unused output connections should remain disconnected.

The Series SFI-800 & SFI-801 Sight Flow Indicators are not field ser­viceable and should be returned if repair is needed (field repair should
not be attempted and may void warranty). Be sure to include a brief
description of the problem plus any relevant application notes. Contact
customer service to receive a return goods authorization number before
shipping.

CAUTION: Be sure that the window locking mechanism is in the
locked position. This would be at the 6 o’clock position, when
mounted on the horizontal plane with the belly down.