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Franklin Electric BT4 Series Horizontal Multi-Stage Booster Pump

BT4 Series 5-25 GPM

Features

  • Stainless steel discharge with 1" NPT outlet
  • Stainless steel bracket with a rugged support foot for horizontal or vertical mounting, a handle for portability, and a 1" NPT inlet
  • Built with Franklin's patented (U.S. patent) 7,290,984 Tri-Seal floating stage system for maximum efficiency, longevity, and performance
  • Acetal impellers, Modified PPO diffusers, and 300-series stainless steel hub, eye seals, shaft, and shell
  • Mechanical seal with carbon/ceramic faces, FKM elastomers, and stainless steel components
  • Industry-proven ODP square-flange 2-compartment motors are easily serviced or replaced without dismantling the pump end or disturbing plumbing connections
  • High service factor, 1/2-3 hp, 2-compartment dual-voltage motors; three-phase inverter duty rated
  • Maximum inlet pressure: 75 PSI
  • Maximum discharge pressure: 400 PSI
  • Maximum fluid handling temperature: 120 °F (49 °C)

Ordering Information

115/230V Models

PhaseVoltsGPMHPS.F.A.ModelOrder No.Wt. (lbs)
1115/23051/212.4/6.25FBT05S49583051037
1115/23053/414.8/7.45FBT07S49583051541
1115/2305119.9/9.955FBT1S49583052046
1115/23071/212.4/6.27FBT05S49583071037
1115/23073/414.8/7.47FBT07S49583071540
1115/2307119.9/9.957FBT1S49583072046
1115/23071-1/224.0/12.07FBT15S49583072553
1115/230101/212.4/6.210FBT05S49583101037
1115/230103/414.8/7.410FBT07S49583101539
1115/23010119.9/9.9510FBT1S49583102045
1115/230101-1/224.0/12.010FBT15S49583102552
1115/23010224.0/12.010FBT2S49583103056
1115/230153/414.8/7.415FBT07S49583151539
1115/23015119.9/9.9515FBT1S49583152044
1115/230151-1/224.0/12.015FBT15S49583152549
1115/23015224.0/12.015FBT2S49583153055
1115/230203/414.8/7.420FBT07S49583201539
1115/23020119.9/9.9520FBT1S49583202044
1115/230201-1/224.0/12.020FBT15S49583202551
1115/23020224.0/12.020FBT2S49583203055
123020313.320FBT3S49583203567
1115/23025119.9/9.9525FBT1S49583252044
1115/230251-1/224.0/12.025FBT15S49583252548
1115/23025224.0/12.025FBT2S49583253054
123025313.325FBT3S49583253566

208-230/460V Models

PhaseVoltsGPMHPS.F.A.ModelOrder No.Wt. (lbs)
3208-230/46051/23.0/1.55FBT05S4-T9583055537
3208-230/46053/43.6/1.85FBT07S4-T9583056041
3208-230/460514.7/2.355FBT1S4-T9583056546
3208-230/46071/23.0/1.57FBT05S4-T9583075537
3208-230/46073/43.6/1.87FBT07S4-T9583076040
3208-230/460714.7/2.357FBT1S4-T9583076546
3208-230/46071-1/26.8/3.47FBT15S4-T9583077053
3208-230/460101/23.0/1.510FBT05S4-T9583105537
3208-230/460103/43.6/1.810FBT07S4-T9583106039
3208-230/4601014.7/2.3510FBT1S4-T9583106545
3208-230/460101-1/26.8/3.410FBT15S4-T9583107052
3208-230/4601028.5/4.2510FBT2S4-T9583107556
3208-230/460153/43.6/1.815FBT07S4-T9583156039
3208-230/4601514.7/2.3515FBT1S4-T9583156544
3208-230/460151-1/26.8/3.415FBT15S4-T9583157049
3208-230/4601528.5/4.2515FBT2S4-T9583157555
3208-230/460203/43.6/1.820FBT07S4-T9583206039
3208-230/4602014.7/2.3520FBT1S4-T9583206544
3208-230/460201-1/26.8/3.420FBT15S4-T9583207051
3208-230/4602028.5/4.2520FBT2S4-T9583207555
3208-230/46020310.0/5.020FBT3S4-T9583208067
3208-230/4602514.7/2.3525FBT1S4-T9583256544
3208-230/460251-1/26.8/3.425FBT15S4-T9583257048
3208-230/4602528.5/4.2525FBT2S4-T9583257554
3208-230/46025310.0/5.025FBT3S4-T9583258066

Dimensions

The following table details the dimensions (A, B, C, D) for the BT4 Series 5-25 GPM pumps. A diagram illustrates these measurements, showing a 1" FNPT inlet and outlet, with dimensions A, B, C, and D (D varies for 1-phase and 3-phase motors).

Model NumberHPPHStg CountABCD (1 PH)D (3 PH)
5FBT05S41/21910.0910.3815.1425.5224.99
5FBT07S43/411212.5511.0017.6028.6028.10
5FBT1S4111515.0111.8820.0631.9430.91
7FBT05S41/2189.2610.3814.3124.6924.16
7FBT07S43/411010.9111.0015.9626.9626.46
7FBT1S4111414.1911.8819.2431.1230.09
7FBT15S41.511918.3012.6323.3535.9835.20
10FBT05S41/2179.0210.3814.0724.4523.92
10FBT07S43/4189.9311.0014.9825.9825.48
10FBT1S4111112.6411.8817.6929.5728.54
10FBT15S41.511516.2612.6321.3133.9433.16
10FBT2S4211818.9712.6324.0236.6536.62
15FBT07S43/4168.1211.0013.1724.1723.67
15FBT1S41189.9311.8814.9826.8625.83
15FBT15S41.511213.5412.6318.5931.2230.44
15FBT2S4211516.2612.6321.3133.9433.91
20FBT07S43/4158.8211.0013.8724.8724.37
20FBT1S411711.2611.8816.3128.1927.16
20FBT15S41.511014.9412.6319.9932.6231.84
20FBT2S4211217.3812.6322.4335.0635.03
20FBT3S4311521.0613.1826.1139.2938.80
25FBT1S411610.0411.8815.0926.9725.94
25FBT15S41.51812.4912.6317.5430.1729.39
25FBT2S4211014.9412.6319.9932.6232.59
25FBT3S4311318.6113.1823.6636.8436.35

Performance

Performance curves are provided for each GPM rating, illustrating Head (in Feet/Meters) versus Flow (in GPM/M³/H). Each curve represents a specific horsepower rating (e.g., 1/2 HP, 3/4 HP, 1 HP, 1-1/2 HP, 2 HP, 3 HP). Shaded areas indicate the 'PUMP OPERATING RANGE' and 'BEST EFFICIENCY RANGE' for each model series.

Performance: 5 GPM

Graph shows Head vs. Flow for 5 GPM models. Curves for 1/3 HP (pump end only), 1/2 HP, 3/4 HP, and 1 HP are displayed. The X-axis represents Flow from 0 to 8 GPM (0 to 1.8 M³/H). The Y-axis represents Head from 0 to 200 Feet (0 to 60 Meters).

Performance: 7 GPM

Graph shows Head vs. Flow for 7 GPM models. Curves for 1/2 HP, 3/4 HP, 1 HP, and 1-1/2 HP are displayed. The X-axis represents Flow from 0 to 11 GPM (0 to 2.0 M³/H). The Y-axis represents Head from 0 to 240 Feet (0 to 80 Meters).

Performance: 10 GPM

Graph shows Head vs. Flow for 10 GPM models. Curves for 1/2 HP, 3/4 HP, 1 HP, 1-1/2 HP, and 2 HP are displayed. The X-axis represents Flow from 0 to 16 GPM (0 to 3.5 M³/H). The Y-axis represents Head from 0 to 240 Feet (0 to 80 Meters).

Performance: 15 GPM

Graph shows Head vs. Flow for 15 GPM models. Curves for 3/4 HP, 1 HP, 1-1/2 HP, and 2 HP are displayed. The X-axis represents Flow from 0 to 22 GPM (0 to 5 M³/H). The Y-axis represents Head from 0 to 200 Feet (0 to 70 Meters).

Performance: 20 GPM

Graph shows Head vs. Flow for 20 GPM models. Curves for 3/4 HP, 1 HP, 1-1/2 HP, and 3 HP are displayed. The X-axis represents Flow from 0 to 30 GPM (0 to 7 M³/H). The Y-axis represents Head from 0 to 180 Feet (0 to 60 Meters).

Performance: 25 GPM

Graph shows Head vs. Flow for 25 GPM models. Curves for 1 HP, 1-1/2 HP, 2 HP, and 3 HP are displayed. The X-axis represents Flow from 0 to 40 GPM (0 to 8 M³/H). The Y-axis represents Head from 0 to 140 Feet (0 to 50 Meters).

BT4 5-25 GPM Pump Ends for 56C Keyed Shaft Motors

Features

  • Stainless steel bracket with a rugged support foot for horizontal or vertical mounting, plus a built-in handle
  • Built with Franklin's patented (U.S. patent) 7,290,984 Tri-Seal floating stage system, providing maximum efficiency, longevity, and performance
  • Acetal impellers, Modified PPO diffusers, and 300-series stainless steel hub, eye seals, shaft, shell, and discharge connection
  • Mechanical seal with carbon/ceramic faces, FKM elastomer, and stainless steel components
  • Maximum inlet pressure: 75 PSI
  • Maximum discharge pressure: 400 PSI
  • Maximum fluid handling temperature: 120 °F (49 °C)
  • 1" NPT inlet and outlet connections, all models

Ordering Information & Dimensions

The following table lists pump end models for 56C keyed shaft motors, including GPM, Stages, HP, Model, Order Number, dimensions A and B, and weight. A diagram illustrates the pump end with its 56C motor mounting and 1" NPT connections.

GPMStagesHPModelOrder No.A (in.)B (in.)Wt. (lbs)
731/35BT03S4-PE9592050713.4211.3118
91/25BT05S4-PE9592050915.0712.9619
5123/45BT07S4-PE9592051217.5315.4220
1515BT1S4-PE9592051519.9917.8821
81/27BT05S4-PE9592070814.2412.1318
7103/47BT07S4-PE9592071015.8913.7819
1417BT1S4-PE9592071419.1717.0620
191-1/27BT15S4-PE9592071923.2821.1724
71/210BT05S4-PE9592100714.0011.8918
83/410BT07S4-PE9592100814.9112.8019
1011110BT1S4-PE9592101117.6215.5120
151-1/210BT15S4-PE9592101521.2419.1323
18210BT2S4-PE9592101823.9521.8424
51/215BT05S4-PE9592150512.2010.0917
63/415BT07S4-PE9592150613.1010.9918
158115BT1S4-PE9592150814.9112.8019
121-1/215BT15S4-PE9592151218.5216.4120
15215BT2S4-PE9592151521.2419.1323
6125BT1S4-PE9592250615.0212.9118
2581-1/225BT15S4-PE9592250817.4715.3619
10225BT2S4-PE9592251019.9217.8120
13325BT3S4-PE9592251323.5921.4824

BT4 35-45 GPM

Features

  • Designed for boosting water pressure from a variety of sources, including municipal and private water systems
  • Enhanced hydraulics for 35 & 45 GPM nominal ratings to deliver more efficient pressure boosting
  • Robust stainless steel bracket, shell & discharge provide optimum corrosion protection
  • Equipped with 1.5" NPT connections at inlet and outlet to minimize system friction loss
  • Versatile bracket can be rotated in 90° increments for simplified, compact plumbing arrangements
  • Multiple bracket drain & pressure tappings enable draining in any position and provide for bypass and accessory plumbing
  • Back pull-out design enables motor removal for servicing without disturbing the pump or plumbing
  • NEMA standard 56C keyed shaft motors are readily available in ODP, TEFC enclosures; 1 & 3-phase for common voltages
  • Carbon-ceramic-FKM mechanical seal is capable of handling a variety of fluids
  • Maximum inlet pressure: 75 PSI
  • Maximum discharge pressure: 400 PSI
  • Maximum fluid handling temperature: 120 °F (49 °C)

Applications

  • Boosting water pressure from city mains or private water systems
  • Pressure washing buildings and floors
  • Poultry houses
  • Spray cooling equipment
  • Lawn and crop irrigation
  • Evaporative cooling system misters
  • Water circulation
  • General purpose plumbing
  • Reverse osmosis
  • Filtration

Nomenclature

Model number breakdown: 35 09 FBT 3 S4 - SE

  • PE = Pump End Only (no 56C motor)
  • S = Single Phase (ODP, 115/230 or 208-230v)
  • SE = Single Phase (TEFC, 115/230 or 208-230v)
  • T = Three Phase (ODP, 208-230/460v)
  • TE = Three Phase (TEFC, 208-230/460v)
  • TE5 = Three Phase (TEFC, 575v)
  • SS = Exterior, 4" diameter hydraulics
  • HP = Horsepower (1, 1.5, 2, 3)
  • Franklin BT Series = Booster, threaded shell
  • Number of Stages
  • Nominal GPM Rating (35 or 45)

Performance

Performance curves are provided for 35 GPM and 45 GPM models, illustrating Head (in Feet/Meters) versus Flow (in GPM/M³/H). Each graph displays curves for different horsepower ratings and stage counts, along with 'PUMP OPERATING RANGE' and 'BEST EFFICIENCY RANGE' shaded areas.

Performance: 35 GPM

Graph shows Head vs. Flow for 35 GPM models. Curves for 3-Stg (1 hp), 5-Stg (1.5 hp), 7-Stg (2 hp), and 9-Stg (3 hp) are displayed. The X-axis represents Flow from 0 to 60 GPM (0 to 12 M³/H). The Y-axis represents Head from 0 to 360 Feet (0 to 100 Meters).

Performance: 45 GPM

Graph shows Head vs. Flow for 45 GPM models. Curves for 2-Stg (1 hp), 3-Stg (1 hp), 4-Stg (1.5 hp), 5-Stg (2 hp), 6-Stg (2 hp), and 7-Stg (3 hp) are displayed. The X-axis represents Flow from 0 to 70 GPM (0 to 13 M³/H). The Y-axis represents Head from 0 to 250 Feet (0 to 75 Meters).

Pressure Boost

Tables provide detailed Head Output and PSI Boost values at specified GPM for various configurations of the BT4 35-45 GPM series.

35 GPM Pressure Boost Data

GPMModelHPSTGHead Output (ft.) at GPM IndicatedPSI Boost at GPM Indicated
020304045020304045
353503FBT1S413100968762474342382720
353505FBT15S41.55166157147102767268644433
353507FBT2S4272302171951329610094845742
353509FBT3S4392962822601751351281221137658

45 GPM Pressure Boost Data

GPMModelHPSTGHead Output (ft.) at GPM IndicatedPSI Boost at GPM Indicated
020304050020304050
454502FBT1S41261605651392626242217
454503FBT1S41392898277604039353326
454504FBT15S41.54125118109102815451474435
454505FBT2S4251541481371151016764595044
454506FBT2S4261841661631501188072716551
454507FBT3S4372142041911771399388837760

Order Information

The following tables detail ordering information for the BT4 35-45 GPM series, including GPM, Phase, Enclosure, Volts, HP, S.F.A., Stages, Order Number, Model Number, and Weight for various configurations.

GPMPhaseEnclosureVoltsHPS.F.A.StagesOrder No.Model No.Weight
351ODP115/230116.8/8.43959335033503FBT1S4-S44
351ODP115/2301.518.4/9.25959335053505FBT15S4-S46
351ODP115/230222.2/12.2-11.17959335073507FBT2S4-S50
351ODP230315.7-14.29959335093509FBT3S4-S56
351TEFC115/230113.8/7.2-6.93959835033503FBT1S4-SE44
351TEFC115/2301.518.4/10.3-9.25959835053505FBT15S4-SE46
351TEFC115/230211.0-10.07959835073507FBT2S4-SE50
351TEFC230315.8-14.69959835093509FBT3S4-SE86
353ODP208-230/46014.6-4.6/2.33959935033503FBT1S4-T47
353ODP208-230/4601.55.8/2.95959935053505FBT15S4-T55
353ODP208-230/46026.4/3.27959935073507FBT2S4-T61
353ODP208-230/46039.4/4.79959935093509FBT3S4-T65
353TEFC208-230/46013.6-3.2/1.63955835033503FBT1S4-TE45
353TEFC208-230/4601.54.9-5.2/2.65955835053505FBT15S4-TE48
353TEFC208-230/46027.1-6.0/3.07955835073507FBT2S4-TE52
353TEFC208-230/4603NA-7.7/3.99955835093509FBT3S4-TE59
451ODP115/230116.8/8.42959345024502FBT1S4-S43
451ODP115/230116.8/8.43959345034503FBT1S4-S44
451ODP115/2301.518.4/9.24959345044504FBT15S4-S46
451ODP115/230222.2/12.2-11.15959345054505FBT2S4-S49
451ODP115/230222.2/12.2-11.16959345064506FBT2S4-S55
451ODP230315.7-14.27959345074507FBT3S4-S55
451TEFC115/230113.8/7.2-6.92959845024502FBT1S4-SE47
451TEFC115/2301.518.4/10.3-9.24959845044504FBT15S4-SE55
451TEFC115/230211.0-10.05959845054505FBT2S4-SE60
451TEFC115/230211.0-10.06959845064506FBT2S4-SE64
451TEFC230315.8-14.67959845074507FBT3S4-SE65
453ODP208-230/46014.6-4.6/2.32959945024502FBT1S4-T43
453ODP208-230/46014.6-4.6/2.33959945034503FBT1S4-T44
453ODP208-230/4601.55.8/2.94959945044504FBT15S4-T46
453ODP208-230/46026.4/3.25959945054505FBT2S4-T49
453ODP208-230/46039.4/4.77959945074507FBT3S4-T85
453TEFC208-230/46013.6-3.2/1.62955845024502FBT1S4-TE44
453TEFC208-230/4601.54.9-5.2/2.64955845044504FBT15S4-TE48
453TEFC208-230/46027.1-6.0/3.05955845054505FBT2S4-TE52
453TEFC208-230/46027.1-6.0/3.06955845064506FBT2S4-TE58
453TEFC208-230/4603NA-7.7/3.97955845074507FBT3S4-TE58

Dimensions

The following table details the dimensions (A, B, C, D) for the BT4 35-45 GPM pumps. A diagram illustrates these measurements, showing 1.5" NPT inlet and outlet connections, a drain plug, and the 56C motor mounting.

GPMPhaseEnclosureVoltsHPStageABCD
351ODP115/230139.1311.4411.1322.57
351ODP115/2301.5511.7111.9413.7125.65
351ODP115/2302714.2810.3116.2826.59
351ODP2303916.8610.8118.8629.67
351TEFC115/230139.179.5211.1320.65
351TEFC115/2301.5511.719.3113.7123.02
351TEFC115/2302714.289.8116.2826.09
351TEFC2303916.8610.8118.8629.67
353ODP208-230/460139.1310.0411.1321.16
353ODP208-230/4601.5511.7110.5413.7124.24
353ODP208-230/4602714.2810.7916.2827.06
353ODP208-230/4603916.8611.2918.8630.14
353TEFC208-230/460139.1311.0011.1322.13
353TEFC208-230/4601.5511.7110.2513.7123.96
353TEFC208-230/4602714.2811.5016.2827.77
353TEFC208-230/4603916.8612.0018.8630.86
451ODP115/230128.7011.4410.7022.14
451ODP115/2301310.4411.4412.4423.88
451ODP115/2301.5412.1711.9414.1726.11
451ODP115/2302513.9110.3115.9126.22
451ODP115/2302615.6410.8117.6428.45
451ODP2303717.3710.8119.3730.18
451TEFC115/230128.7010.0410.7020.73
451TEFC115/2301.5412.1710.5414.1724.70
451TEFC115/2302513.9110.7915.9126.69
451TEFC115/2302615.6411.2917.6428.92
451TEFC2303717.3711.2919.3730.65
453ODP208-230/460128.709.5210.7020.22
453ODP208-230/4601310.449.5212.4421.96
453ODP208-230/4601.5412.179.3114.1723.48
453ODP208-230/4602513.919.8115.9125.72
453ODP208-230/4603717.3710.8119.3730.18
453TEFC208-230/460128.7011.0010.7021.70
453TEFC208-230/4601.5412.1710.2514.1724.42
453TEFC208-230/4602513.9111.5015.9127.40
453TEFC208-230/4602615.6412.0017.6429.64
453TEFC208-230/4603717.3712.0019.3731.37

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