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Submittal Sheet

ManualsBrandsMcdonnell & Miller ManualsFlow SwitchesFS254, General purpose flow switch w/ NEMA 4 enclosure (Replaces FS8-W)
12
SUBMITTAL
MM-627
JOB:
REPRESENTATIVE:
UNIT TAG:
ORDER NO.
DATE:
ENGINEER:
SUBMITTED BY:
DATE:
CONTRACTOR:
APPROVED BY:
DATE:
Series FS250
General Purpose
Liquid Flow
Switches
FS251
FS254
Materials of Construction
Part Specifications
Wetted Body Brass
Paddle arm Brass
Pivot Pin Brass
O-ring EPDM
Paddles Stainless Steel
Housing Base
FS251 Aluminized Steel
FS254 Aluminum
Housing Cover
FS251 Polycarbonate
FS254 Aluminum
Ratings
FS251 NEMA-1
FS254 NEMA-4
Maximum Operating Pressure 160 psig (11.0 bar)
Maximum Temperature 250°F (121 °C)
Motor Switch Rating
(Amperes)
Voltage Full Load
Locked
Rotor Pilot Duty
120VAC 7.4 44.4
125 VA at
120
or 240 VAC
50 or 60 cycles
240 VAC 3.7 22.2
† Without Paddle Damage
Series FS250
Pipe Size
NPT
(in.)
Flow
Adjustment
Setting
Flow
gpm
(lpm)
No Flow
gpm
(lpm)
Max Flow
Rate (gpm)
(lpm)†
1"
Minimum 5.8 (22) 5.1 (19)
27
Maximum 12.6 (48) 11.9 (45) (102)
1-1/4"
Minimum 6.7 (25) 6.0 (23)
47
Maximum 19.1 (72) 18.0 (68) (178)
1-1/2"
Minimum 8.4 (32) 7.0 (26)
63
Maximum 25.3 (96) 24.1 (91) (238)
2"
Minimum 12.9 (49) 11.2 (42)
105
Maximum 31.5 (119) 30.2 (114) (397)
2-1/2"
Minimum 17.9 (68) 14.5 (55)
149
Maximum 43.2 (164) 40.0 (151) (564)
3"
Minimum 26.2 (99) 20.2 (76)
230
Maximum 54.9 (208) 49.8 (188) (871)
4"
Minimum 42.0 (159) 33.7 (128)
397
Maximum 75.6 (286) 68.0 (257) (1503)
5"
Minimum 54.6 (207) 46.7 (177)
654
Maximum 109.4 (414) 98.4 (372) (2475)
6"
Minimum 67.7 (256) 60.2 (228)
900
Maximum 131.1 (496) 123.5 (467) (3407)
© COPYRIGHT 2007 ITT Corporation
McDonnell & Miller

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