TFP1510
Page 3 of 4
Installation
The Model BFV-N Grooved End Butter-
fly Valves may be installed with flow in
either direction and can be positioned
either horizontally or vertically.
The grooved end pipe couplings used
with the Model BFV-N must be listed or
approved for fire protection service and
installed in accordance with the manu-
facturers instructions.
The Model BFV-N Butterfly Valve may
be installed with any schedule of pres-
sure class of pipe or tubing that is listed
or approved for fire protection.
As applicable, refer to Figure 2 for the
internal switch wiring diagram.
Conduit and electrical connections
are to be made in accordance with
the authority having jurisdiction and/
or the National Electrical Code. With
reference to Figure 2, the supervisory
switch is intended for connection to
the supervisory circuit of a fire alarm
control panel in accordance with NFPA
72. The auxiliary switch is intended for
the unsupervised connection to aux-
iliary equipment in accordance with
NFPA 70, National Electric Code.
NOTE:
For outdoor applications with
internal supervisory switches, it is rec-
ommended that wiring connections
be made at a temperature above 15°F
(-9°C), in order to insure sufficient flex-
ibility of the wire lead insulation.
Stop
Adjustment
Procedure
The gear operator’s OPEN and SHUT
position have been factory set. The
following procedure should be used if
slight adjustments are needed. Refer to
Figure 3.
Step 1.
Turn the Handwheel until the
valve is fully closed.
Step 2.
Remove two lockscrews (A)
from the gear operator body.
Step 3.
Turn the Shut Stop Screw (B)
clockwise until snug.
Step 4.
Turn the Handwheel until the
valve is fully open.
Step 5.
Turn the Open Stop Screw (C)
clockwise until snug.
Step 6.
Close the valve by turning the
Handwheel until the valve is fully in
the closed position. Ensure the disc
has returned to the fully closed posi-
tion and the disc is centered in the seat
area. Readjust the Shut Stop Screw if
necessary.
Step 7.
Replace two lockscrews (A)
into the gear Operator body locking
the stops into position.
10 INCH (DN250)
8 INCH (DN200)
6 INCH (DN150)
5 INCH (DN125)
4 INCH (DN100)
3 INCH (DN80)
2-1/2 INCH (DN65)
2.0
0.4
0.1
0.2
0.3
0.6
0.5
0.8
1.0
3.0
4.0
5.0
60
100
200
600
400
1000
2000
10000
6000
4000
600
10000
6000
1000
2000
4000
20000
40000
400
0,30
0,20
0,08
0,10
0,06
0,04
0,05
0,03
0,02
0,01
FLOW RATE IN LITRES PER MINUTE (LPM)
FLOW RATE IN GALLONS PER MINUTE (GPM)
NOMINAL PRESSURE DROP
IN POUNDS PER SQUARE INCH (PSI)
(1 PSI = 0,06895 BAR)
NOMINAL PRESSURE DROP IN BAR
(1 GPM = 3,785 LPM)
15000
300
A
C
A
B
OPEN
SHUT
GRAPH A
DN65 THROUGH DN250 MODEL BFV-N BUTTERFLY VALVE
NOMINAL PRESSURE DROP VERSUS FLOW
FIGURE 3
MODEL BFV-N GROOVED END
BUTTERFLY VALVE
OPERATOR ADJUSTMENT