Wheatley P50 (2S-1) Simplex Plunger Pump
IEQ is an OEM supplier of the Wheatley P50 Pump. Let the friendly customer service staff at IEQ Industries help you find the Wheatley Pump you need.

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Specifications
Pump Size:
maximum plunger size x stroke length, in.(mm)
2.000 x 1.000 (50.8 x 25.4)
Rated BPH:(kW) at 350 RPM (Crankshaft speed)
2.5 (1.9)
Rated plunger load: pounds (kg)
2030 (921)
Maximum discharge pressure: psi (kPa)
"L" Model: 1149 (7920)
"M" Model: 2042 (14081)
"H" Model: 4595 (31681)
Crankshaft extension:
Diameter, in.(mm): 1.500 (38.1)
Length, in.(mm): 3.375 (85.73)
Keyway width x depth, in.(mm):
3/8 x 3/16 (9.53 x 4.76)
Maximum recommended sheave diameter, in.(mm):
25 (635)
For larger sizes: Contact IEQ
Oil Capacity: gallons (L)
Crankcase: 1/2 (1.89)
Weight: pump only on wood shipping skids, pounds (kg)
219 (99)
Weight varies with pump model
Standard Materials for Fluid Ends:
"L" & "M" models
Cast Ductile Iron, Cast 316 Stainless Steel
Cast Nickel-Aluminum-Bronze
Plate Carbon Steel
"H" model
Forged/Plate Carbon Steel
Forged 15-5 Stainless Steel
Pump Model | Flange Connections | Dimensions (Inches) | ||||||
Discharge Connection Sizes | Suction Connection Sizes | A | B | C | D | E | F | |
2S-1L | 1 (25.4) - 11 1/2 FNPT | 2 (50.8) - 11 1/2 FNPT | 3 1/8 | 4 7/8 | 3 1/2 | 20 3/8 | 29 9/16 | 5 15/16 |
2S-1M | 1 (25.4) - 11 1/2 FNPT | 2 (50.8) - 11 1/2 FNPT | 3 1/8 | 4 7/8 | 3 1/2 | 20 3/8 | 29 9/16 | 5 15/16 |
2S-1H | 3/4 (19.05) - 14 FNPT | 1 1/4 (31.75) - 11 1/2 FNPT | 3 3/4 | 4 1/4 | 5 1/2 | 20 | 31 5/16 | 7 1/8 |
Performance Data
PUMP | English Units | 50 RPM | 150 RPM | 200 RPM | 250 RPM | 300 RPM | 350 RPM | ||||||||||
Plunger Dia. In. | Plunger Area Sq. In. | BPD per RPM | GPM per RPM | Max. Press. PSI | BPD | GPM | BPD | GPM | BPD | GPM | BPD | GPM | BPD | GPM | BPD | GPM | |
2S-1L (P50BLS) | 2.000 | 3.1416 | 0.4663 | 0.0136 | 646 | 24 | 0.7 | 70 | 2.0 | 94 | 2.7 | 117 | 3.4 | 140 | 4.1 | 164 | 4.8 |
1.875 | 2.7612 | 0.4098 | 0.0120 | 735 | 21 | 0.6 | 62 | 1.8 | 82 | 2.4 | 103 | 3.0 | 123 | 3.6 | 144 | 4.2 | |
1.750 | 2.4053 | 0.3570 | 0.0104 | 844 | 18 | 0.5 | 54 | 1.6 | 72 | 2.1 | 90 | 2.6 | 108 | 3.1 | 125 | 3.6 | |
1.625 | 2.0739 | 0.3078 | 0.0090 | 979 | 16 | 0.4 | 47 | 1.3 | 62 | 1.8 | 77 | 2.2 | 93 | 2.7 | 108 | 3.1 | |
1.500 | 1.7671 | 0.2623 | 0.0076 | 1149 | 14 | 0.4 | 40 | 1.1 | 53 | 1.5 | 66 | 1.9 | 79 | 2.3 | 92 | 2.7 | |
2S-1M (P50B) | 1.750 | 2.4053 | 0.3570 | 0.0104 | 844 | 18 | 0.5 | 54 | 1.6 | 72 | 2.1 | 90 | 2.6 | 108 | 3.1 | 125 | 3.6 |
1.625 | 2.0739 | 0.3078 | 0.0090 | 979 | 16 | 0.4 | 47 | 1.3 | 62 | 1.8 | 77 | 2.2 | 93 | 2.7 | 108 | 3.1 | |
1.500 | 1.7671 | 0.2623 | 0.0076 | 1149 | 14 | 0.4 | 40 | 1.1 | 53 | 1.5 | 66 | 1.9 | 79 | 2.3 | 92 | 2.7 | |
1.375 | 1.4849 | 0.2204 | 0.0064 | 1367 | 12 | 0.3 | 34 | 1.0 | 45 | 1.3 | 56 | 1.6 | 67 | 1.9 | 78 | 2.2 | |
1.250 | 1.2272 | 0.1821 | 0.0053 | 1654 | 10 | 0.3 | 28 | 0.8 | 37 | 1.1 | 46 | 1.3 | 55 | 1.6 | 64 | 1.9 | |
1.125 | 0.9940 | 0.1475 | 0.0043 | 2042 | 8 | 0.2 | 23 | 0.6 | 30 | 0.9 | 37 | 1.1 | 45 | 1.3 | 52 | 1.5 | |
2S-1H (P50BH) | 1.000 | 0.7854 | 0.1166 | 0.0034 | 2585 | 6 | 0.2 | 18 | 0.5 | 24 | 0.7 | 30 | 0.8 | 35 | 1.0 | 41 | 1.2 |
0.875 | 0.6013 | 0.0892 | 0.0026 | 3376 | 5 | 0.1 | 14 | 0.4 | 18 | 0.5 | 23 | 0.7 | 27 | 0.8 | 32 | 0.9 | |
0.750 | 0.4418 | 0.0656 | 0.0019 | 4595 | 4 | 0.1 | 10 | 0.3 | 14 | 0.4 | 17 | 0.5 | 20 | 0.6 | 23 | 0.7 | |
Brake Horsepower required | 0.4 | 1.1 | 2.0 | 1.8 | 2.1 | 2.5 |
PUMP | Metric Units | 50 RPM | 150 RPM | 200 RPM | 250 RPM | 300 RPM | 350 RPM | ||||||||||
Plunger Dia. mm | Plunger Area cm2 | M3/Hr per RPM | L/Sec. per RPM | Max. Press. kPa | M3/Hr | L/Sec. | M3/Hr | L/Sec. | M3/Hr | L/Sec. | M3/Hr | L/Sec. | M3/Hr | L/Sec. | M3/Hr | L/Sec. | |
2S-1L (P50BLS) | 51 | 20.268 | 0.0031 | 0.0009 | 4455 | 0.15 | 0.04 | 0.46 | 0.13 | 0.62 | 0.17 | 0.77 | 0.21 | 0.93 | 0.26 | 1.08 | 0.30 |
48 | 17.814 | 0.0027 | 0.0008 | 5069 | 0.14 | 0.04 | 0.41 | 0.11 | 0.54 | 0.15 | 0.68 | 0.19 | 0.81 | 0.23 | 0.95 | 0.26 | |
44 | 15.518 | 0.0024 | 0.0007 | 5819 | 0.12 | 0.03 | 0.35 | 0.10 | 0.47 | 0.13 | 0.59 | 0.16 | 0.71 | 0.20 | 0.83 | 0.23 | |
41 | 13.380 | 0.0020 | 0.0006 | 6749 | 0.10 | 0.03 | 0.31 | 0.08 | 0.41 | 0.11 | 0.51 | 0.14 | 0.61 | 0.17 | 0.71 | 0.20 | |
38 | 11.401 | 0.0017 | 0.0005 | 7920 | 0.09 | 0.02 | 0.26 | 0.07 | 0.35 | 0.10 | 0.43 | 0.12 | 0.52 | 0.14 | 0.61 | 0.17 | |
2S-1M (P50B) | 44 | 15.518 | 0.0024 | 0.0007 | 5819 | 0.12 | 0.03 | 0.35 | 0.10 | 0.47 | 0.13 | 0.59 | 0.16 | 0.71 | 0.20 | 0.83 | 0.23 |
41 | 13.380 | 0.0020 | 0.0006 | 6749 | 0.10 | 0.03 | 0.31 | 0.08 | 0.41 | 0.11 | 0.51 | 0.14 | 0.61 | 0.17 | 0.71 | 0.20 | |
38 | 11.401 | 0.0017 | 0.0005 | 7920 | 0.09 | 0.02 | 0.26 | 0.07 | 0.35 | 0.10 | 0.43 | 0.12 | 0.52 | 0.14 | 0.61 | 0.17 | |
35 | 9.580 | 0.0015 | 0.0004 | 9426 | 0.07 | 0.02 | 0.22 | 0.06 | 0.29 | 0.08 | 0.36 | 0.10 | 0.44 | 0.12 | 0.51 | 0.14 | |
32 | 7.917 | 0.0012 | 0.0003 | 11405 | 0.06 | 0.02 | 0.18 | 0.05 | 0.24 | 0.07 | 0.30 | 0.08 | 0.36 | 0.10 | 0.42 | 0.12 | |
29 | 6.413 | 0.0010 | 0.0003 | 14081 | 0.05 | 0.01 | 0.15 | 0.04 | 0.20 | 0.05 | 0.24 | 0.07 | 0.29 | 0.08 | 0.34 | 0.10 | |
2S-1H (P50BH) | 25 | 5.067 | 0.0008 | 0.0002 | 17821 | 0.04 | 0.01 | 0.12 | 0.03 | 0.15 | 0.04 | 0.19 | 0.05 | 0.23 | 0.06 | 0.27 | 0.08 |
22 | 3.879 | 0.0006 | 0.0002 | 23276 | 0.03 | 0.01 | 0.09 | 0.02 | 0.12 | 0.03 | 0.15 | 0.04 | 0.18 | 0.05 | 0.21 | 0.06 | |
19 | 2.850 | 0.0004 | 0.0001 | 31681 | 0.02 | 0.01 | 0.07 | 0.02 | 0.09 | 0.02 | 0.11 | 0.03 | 0.13 | 0.04 | 0.15 | 0.04 | |
Kilowatts Required | 0.3 | 0.8 | 1.5 | 1.3 | 1.6 | 1.9 |
Wheatley P50 HIGH PRESSURE (5S-2) Simplex Plunger Pump
IEQ is an OEM supplier of the Wheatley P50 HIGH PRESSURE (5S-2) Pump. Let the friendly customer service staff at IEQ Industries help you find the GASO Pump you need.

Specifications
Pump Size:
maximum plunger size x stroke length, in.(mm)
2.000 x 2.188 (50.8 x 55.56)
Rated BPH:(kW) at 350 RPM (Crankshaft speed)
5.5 (4.1)
Rated plunger load: pounds (kg)
2030 (921)
Maximum discharge pressure: psi (kPa)
"L" Model: 1149 (7920)
"M" Model: 2042 (14081)
"H" Model: 4595 (31681)
Crankshaft extension:
Diameter, in.(mm): 1.500 (38.1)
Length, in.(mm): 3.375 (85.73)
Keyway width x depth, in.(mm):
3/8 x 3/16 (9.53 x 4.76)
Maximum recommended sheave diameter, in.(mm):
25 (635)
For larger sizes: Contact IEQ
Oil Capacity: gallons (L)
Crankcase: 1/2 (1.89)
Weight: pump only on wood shipping skids, pounds (kg)
219 (99)
Weight varies with pump model
Standard Materials for Fluid Ends:
"L" & "M" models
Cast Ductile Iron, Cast 316 Stainless Steel
Cast Nickel-Aluminum-Bronze
Plate Carbon Steel
"H" model
Forged/Plate Carbon Steel
Forged 15-5 Stainless Steel
Pump Model | Flange Connections | Dimensions (Inches) | ||||||
Discharge Connection Sizes | Suction Connection Sizes | A | B | C | D | E | F | |
5S-2L | 1 (25.4) - 11 1/2 FNPT | 2 (50.8) - 11 1/2 FNPT | 3 1/8 | 4 7/8 | 3 1/2 | 20 3/8 | 29 9/16 | 5 15/16 |
5S-2M | 1 (25.4) - 11 1/2 FNPT | 2 (50.8) - 11 1/2 FNPT | 3 1/8 | 4 7/8 | 3 1/2 | 20 3/8 | 29 9/16 | 5 15/16 |
5S-2H | 3/4 (19.05) - 14 FNPT | 1 1/4 (31.75) - 11 1/2 FNPT | 3 3/4 | 4 1/4 | 5 1/2 | 20 | 31 5/16 | 7 1/8 |
Performance Data
PUMP | English Units | 50 RPM | 150 RPM | 200 RPM | 250 RPM | 300 RPM | 350 RPM | ||||||||||
Plunger Dia. In. | Plunger Area Sq. In. | BPD per RPM | GPM per RPM | Max. Press. PSI | BPD | GPM | BPD | GPM | BPD | GPM | BPD | GPM | BPD | GPM | BPD | GPM | |
5S-2L (P50ALS) | 2.000 | 3.1416 | 1.0200 | 0.0297 | 646 | 51 | 1.49 | 1.53 | 4.46 | 204 | 5.95 | 255 | 7.44 | 306 | 8.92 | 357 | 10.41 |
1.875 | 2.7612 | 0.8965 | 0.0261 | 735 | 45 | 1.31 | 135 | 3.92 | 180 | 5.23 | 225 | 6.54 | 269 | 7.84 | 314 | 9.15 | |
1.750 | 2.4053 | 0.7809 | 0.0228 | 844 | 40 | 1.14 | 118 | 3.42 | 157 | 4.56 | 196 | 5.69 | 235 | 6.83 | 274 | 7.97 | |
1.625 | 2.0739 | 0.6734 | 0.0196 | 979 | 34 | 0.98 | 102 | 2.95 | 135 | 3.93 | 169 | 4.91 | 203 | 5.89 | 236 | 6.87 | |
1.500 | 1.7671 | 0.5737 | 0.0167 | 1149 | 29 | 0.84 | 87 | 2.51 | 115 | 3.35 | 144 | 4.18 | 173 | 5.02 | 201 | 5.86 | |
5S-2M (P50A) | 1.750 | 2.4053 | 0.7809 | 0.0228 | 844 | 40 | 1.14 | 118 | 3.42 | 157 | 4.56 | 196 | 5.69 | 235 | 6.83 | 274 | 7.97 |
1.625 | 2.0739 | 0.6734 | 0.0196 | 979 | 34 | 0.98 | 102 | 2.95 | 135 | 3.93 | 169 | 4.91 | 203 | 5.89 | 236 | 6.87 | |
1.500 | 1.7671 | 0.5737 | 0.0167 | 1149 | 29 | 0.84 | 87 | 2.51 | 115 | 3.35 | 144 | 4.18 | 173 | 5.02 | 201 | 5.86 | |
1.375 | 1.4849 | 0.4821 | 0.0141 | 1367 | 25 | 0.70 | 73 | 2.11 | 97 | 2.81 | 121 | 3.52 | 145 | 4.22 | 169 | 4.92 | |
1.250 | 1.2272 | 0.3984 | 0.0116 | 1654 | 20 | 0.58 | 60 | 1.74 | 80 | 2.32 | 100 | 2.91 | 120 | 3.49 | 140 | 4.07 | |
1.125 | 0.9940 | 0.3227 | 0.0094 | 2042 | 17 | 0.47 | 49 | 1.41 | 65 | 1.88 | 81 | 2.35 | 97 | 2.82 | 113 | 3.29 | |
5S-2H (P50H) | 1.000 | 0.7854 | 0.2550 | 0.0074 | 2585 | 13 | 0.37 | 39 | 1.12 | 51 | 1.49 | 64 | 1.86 | 77 | 2.23 | 90 | 2.60 |
0.875 | 0.6013 | 0.1952 | 0.0057 | 3376 | 10 | 0.28 | 30 | 0.85 | 40 | 1.14 | 49 | 1.42 | 59 | 1.71 | 69 | 1.99 | |
0.750 | 0.4418 | 0.1434 | 0.0042 | 4595 | 8 | 0.21 | 22 | 0.63 | 29 | 0.84 | 36 | 1.05 | 44 | 1.26 | 51 | 1.46 | |
Brake Horsepower required | 0.8 | 2.3 | 4.0 | 3.9 | 4.7 | 5.5 |
PUMP | Metric Units | 50 RPM | 150 RPM | 200 RPM | 250 RPM | 300 RPM | 350 RPM | ||||||||||
Plunger Dia. mm | Plunger Area cm2 | M3/Hr per RPM | L/Sec. per RPM | Max. Press. kPa | M3/Hr | L/Sec. | M3/Hr | L/Sec. | M3/Hr | L/Sec. | M3/Hr | L/Sec. | M3/Hr | L/Sec. | M3/Hr | L/Sec. | |
5S-2L (P50ALS) | 51 | 20.268 | 0.0068 | 0.0019 | 4455 | 0.34 | 0.09 | 1.01 | 0.28 | 1.35 | 0.38 | 1.69 | 0.47 | 2.03 | 0.56 | 2.36 | 0.66 |
48 | 17.814 | 0.0059 | 0.0016 | 5069 | 0.30 | 0.08 | 0.89 | 0.25 | 1.19 | 0.33 | 1.48 | 0.41 | 1.78 | 0.49 | 2.08 | 0.58 | |
44 | 15.518 | 0.0052 | 0.0014 | 5819 | 0.26 | 0.07 | 0.78 | 0.22 | 1.03 | 0.29 | 1.29 | 0.36 | 1.55 | 0.43 | 1.81 | 0.50 | |
41 | 13.380 | 0.0045 | 0.0012 | 6749 | 0.22 | 0.06 | 0.67 | 0.19 | 0.89 | 0.25 | 1.12 | 0.31 | 1.34 | 0.37 | 1.56 | 0.43 | |
38 | 11.401 | 0.0038 | 0.0011 | 7920 | 0.19 | 0.05 | 0.57 | 0.16 | 0.76 | 0.21 | 0.95 | 0.26 | 1.14 | 0.32 | 1.33 | 0.37 | |
5S-2M (P50A) | 44 | 15.518 | 0.0052 | 0.0014 | 5819 | 0.26 | 0.07 | 0.78 | 0.22 | 1.03 | 0.29 | 1.29 | 0.36 | 1.55 | 0.43 | 1.81 | 0.50 |
41 | 13.380 | 0.0045 | 0.0012 | 6749 | 0.22 | 0.06 | 0.67 | 0.19 | 0.89 | 0.25 | 1.12 | 0.31 | 1.34 | 0.37 | 1.56 | 0.43 | |
38 | 11.401 | 0.0038 | 0.0011 | 7920 | 0.19 | 0.05 | 0.57 | 0.16 | 0.76 | 0.21 | 0.95 | 0.26 | 1.14 | 0.32 | 1.33 | 0.37 | |
35 | 9.580 | 0.0032 | 0.0009 | 9426 | 0.16 | 0.04 | 0.48 | 0.13 | 0.64 | 0.18 | 0.80 | 0.22 | 0.96 | 0.27 | 1.12 | 0.31 | |
32 | 7.917 | 0.0026 | 0.0007 | 11405 | 0.13 | 0.04 | 0.40 | 0.11 | 0.53 | 0.15 | 0.66 | 0.18 | 0.79 | 0.22 | 0.92 | 0.26 | |
29 | 6.413 | 0.0021 | 0.0006 | 14081 | 0.11 | 0.03 | 0.32 | 0.09 | 0.43 | 0.12 | 0.53 | 0.15 | 0.64 | 0.18 | 0.75 | 0.21 | |
5S-2H (P50H) | 25 | 5.067 | 0.0017 | 0.0005 | 17821 | 0.08 | 0.02 | 0.25 | 0.07 | 0.34 | 0.09 | 0.42 | 0.12 | 0.51 | 0.14 | 0.59 | 0.16 |
22 | 3.879 | 0.0013 | 0.0004 | 23276 | 0.06 | 0.02 | 0.19 | 0.05 | 0.26 | 0.07 | 0.32 | 0.09 | 0.39 | 0.11 | 0.45 | 0.13 | |
19 | 2.850 | 0.0010 | 0.0003 | 31681 | 0.05 | 0.01 | 0.14 | 0.04 | 0.19 | 0.05 | 0.24 | 0.07 | 0.29 | 0.08 | 0.33 | 0.09 | |
Kilowatts Required | 0.6 | 1.7 | 3.0 | 2.9 | 3.5 | 4.1 |
For operation below 50 RPM, an auxiliary lubrication system is required.
Volumetric Rate is based on 100% Volumetric Efficiency. Brake Horsepower/Kilowatts Required is based on 72% Mechanical Efficiency.