M/M Series FS4-3

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McDonnell Miller Series FS4-3 Universal design serves the widest variety of applications. 1" NPT. Two electrical knock-outs allows connection from either end.  Sensitivity adjusting screw makes flow adjustment easy.  Single pole, double throw snap switch.  Hardened stainless steel bearings minimize friction. Sealed Monel bellows. 
Minimum temperature 32F
Maximum temperature 300F
Maximum pressure 150 psi

Ordering Information
Model Number Part Number Description Weight lbs. Price
FS4-3 114400 General Purpose flow switch 1.9 $146.00
FS4-3J 114610 FS4-3 w/ BSPT connection 1.9 $150.00
FS4-3-RP 114650 FS4-3 w/ SS reinforced paddles 2.3 $195.00
FS4-3Z 114410 FS4-3 w/ ANSI terminal connections 1.9 $Call
FS4-3A 114450 FS4-3 w/ tamper-proof cover screws 2 $Call
FS4-3C 114451 FS4-3 w/ trimmed paddles 1.9 $Call
FS4-3D 114550 FS4-3 w/ 2 SPDT switches 2.3 $240.00
FS4-3S 114641 FS4-3 w/ SS body, monel bellows 1.9 $460.00
FS4-3SJ 176216 FS4-3S w/ BSPT connection 1.9 $Call
FS4-3DS 114642 FS4-3S w/ 2 SPDT switches 3.3 $535.00
FS4-3-5R 114405 FS4-3 w/ 5 second DOB 2.3 $Call
FS4-3-20 114425 FS4-3 w/ 20 second DOB 2.3 $Call
FS4-3J-E 114611 FS4-3J-CE conformance rated 1.9 $Call
FS4-3D-E 114552 FS4-3D-CE conformance rated 1.9 $Call
FS4-3S-E 114646 FS4-3S-CE conformance rated 1.9 $Call
FS4-3F 114625 FS4-3 for sprinkler service 1.9 $175.00
FS4-3FCAN 114626 FS4-3 for sprinkler service (Canada) 2.3 $Call
FS4-3F-20 114635 FS4-3F w/ 20 second DOM 2.3 $Call
FS4-3DF 114555 FS4-3F w/ 2 SPDT switches 2.3 $250.00
FS4-3DF-20 114640 FS4-3F w/ 20 second DOM, 2 SPDT switches 3.3 $410.00

NOTE: Do not use liquid flow switches on systems with flow greater than 10 feet per second


 

Electrical Ratings
Voltage Motor Switching Rating Pilot Duty
Full Load Locked Rotor
120 VAC 7.4 44.4 125 VA at 120 or 240 VAC
240 VAC 3.7 22.2
Dimensions
A B C D E F G
3 1 1/2 7/8 2 7/32 8 7/16 2 15/16 3 3/8
H J K L M N
1 11/16 1 7/16 1 1/8 3 7/16 2 1/16 1
Flow Rates
  Mode of Operation  
Pipe Size NPT in. Settings Flow gpm No Flow gpm Max. Flow Rate gpm w/o paddle damage
1 Factory or minimum 6 3.6 27
Maximum 10.2 9.2
1 1/4 Factory or minimum 9.8 5.6 47
Maximum 16.8 15
1 1/2 Factory or minimum 12.7 7 63
Maximum 23 198.5
2 Factory or minimum 18.8 9.4 105
Maximum 32.8 24
2 1/2 Factory or minimum 24.3 11.6 149
Maximum 42.4 37.5
3 Factory or minimum 30 12 230
Maximum 52.1 46.1
4 Factory or minimum 39.7 19.8 397
Maximum 73.5 64.2
5 Factory or minimum 58.7 29.3 654
Maximum 115 92
6 Factory or minimum 79.2 39.6 900
Maximum 166 123

Values are +- 10%

For Model FS4-3F & FS4-3DF
NPT Pipe Size Paddle to use Length Tee Size
1" 1 11/32" as furnished (only) 1" x 1" x 1" NPT Tee
1 1/4" Trim 1 1/2" pipe size paddle with template 1 1/4" x 1 1/4" x 1" NPT Tee (Paddle must be bowed for insertion into 1 1/4" tee)
1 1/2" 2 1/16" as furnished (only) 1 1/2" x 1 1/2" x 1" NPT Tee (Paddle must be bowed for insertion into 1 1/2" tee)

  NOTE: Only listed pipe sizes meet UL requirements for fire sprinkler systems.



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