
Download your copy of the HP-125M Specs: Wheatley HP-125M Quintuplex Plunger Pump
Want to make this drawing interactive?
Get access to our Interactive Parts List for this pump and others.
SPECIFICATIONS
- maximum plunger size x stroke length, in.(mm)
- 3.000 x 3.500 (76.2 x 88.9)
- 102 (76)
- 4760 (2159)
- “L” model: 970 (6686)
- “M” model: 2295 (15825)
- “MS” model: 4789 (33017)
- “H” model: 10000 (68948)
- Diameter, in.(mm): 2.500 (63.5)
- Length, in.(mm): 5.250 (133.35)
- Keyway width x depth, in.(mm):
- 5/8 x 5/16 (15.875 x 7.938)
- Maximum recommended sheave diameter, in.(mm):
- 38 (965.2)
- For larger sizes: Contact our sales team.
- if gear reducer is supplied, in.(mm)
- For belt or chain drive: Contact Factory
- For direct drive: Diameter, in.(mm): 2.000 (50.8)
- Length, in.(mm): 4.25 (108.0)
- Keyway width x depth, in.(mm):
- 1/2 x 1/4 (12.70 x 6.35)
- 3.00:1, 3.12:1, 3.23:1, 3.36:1, 3.49:1,
- 3.62:1, 3.78:1, 3.94:1, 4.11:1, 4.29:1,
- 4.48:1, 4.69:1, 4.93:1, 5.17:1
- Crankcase: 5 (18.93)
- Gear Reducer varies with ratio:
- 1.25 to 1.50 (4.73 to 5.68)
- “L” model: 1620 (735)
- “M” model: 1450 (658)
- “MS” model: 1600 (726)
- “H” model: 1700 (771)
- “L” model
- Cast Ductile Iron
- Cast Nickel-Aluminum-Bronze
- Cast Duplex Stainless Steel
- Forged/Plate Carbon Steel
- “M” model
- Cast Ductile Iron
- Cast Nickel-Aluminum-Bronze
- Cast Duplex Stainless Steel
- Forged/Plate Carbon Steel
- “MS” model
- Forged Nickel-Aluminum-Bronze
- Forged/Plate Carbon Steel
- Forged 316 Stainless Steel
- “H” model
- Forged 15-5 Stainless Steel
Performance Data
Wheatley HP-125M English Chart
Pump | English Units | 50 RPM | 150 RPM | 250 RPM | 350 RPM | 440 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 | |
HP125-M | 3 | 7.0686 | 18.36 | 0.5355 | 720 | 918 | 27 | 2754 | 80 | 4590 | 134 | 6426 | 187 | 8078 | 236 |
2.875 | 6.4918 | 16.862 | 0.4918 | 784 | 843 | 25 | 2529 | 74 | 4216 | 123 | 5902 | 172 | 7419 | 216 | |
2.75 | 5.9396 | 15.427 | 0.45 | 857 | 771 | 22 | 2314 | 67 | 3857 | 112 | 5400 | 157 | 6788 | 198 | |
2.625 | 5.4119 | 14.057 | 0.41 | 941 | 703 | 20 | 2109 | 61 | 3514 | 102 | 4920 | 143 | 6185 | 180 | |
2.5 | 4.9087 | 12.75 | 0.3719 | 1037 | 637 | 19 | 1913 | 56 | 3188 | 93 | 4463 | 130 | 5610 | 164 | |
2.375 | 4.4301 | 11.507 | 0.3356 | 1149 | 575 | 17 | 1726 | 50 | 2877 | 84 | 4027 | 117 | 5063 | 148 | |
2.25 | 3.9761 | 10.327 | 0.3012 | 1280 | 516 | 15 | 1549 | 45 | 2582 | 75 | 3615 | 105 | 4544 | 133 | |
2.125 | 3.5466 | 9.212 | 0.2687 | 1435 | 461 | 13 | 1382 | 40 | 2303 | 67 | 3224 | 94 | 4053 | 118 | |
2 | 3.1416 | 8.16 | 0.238 | 1620 | 408 | 12 | 1224 | 36 | 2040 | 59 | 2856 | 83 | 3590 | 105 | |
1.875 | 2.7612 | 7.172 | 0.2092 | 1843 | 359 | 10 | 1076 | 31 | 1793 | 52 | 2510 | 73 | 3156 | 92 | |
1.75 | 2.4053 | 6.247 | 0.1822 | 2115 | 312 | 9 | 937 | 27 | 1562 | 46 | 2187 | 64 | 2749 | 80 |
Volumetric Rate is based on 100% Volumetric Efficiency. Brake Horsepower/Kilowatts Required is based on 90% Mechanical Efficiency.
For operation below 150 RPM, an auxiliary lubrication system is required.

Need Wheatley Parts?
Trying to track down discontinued parts for Wheatley pumps can prove quite frustrating. However, it's critical that you find the spherical valve, connecting rods or gland nuts needed to keep your pumps in working order. Some people make the mistake of throwing out their pumps instead of searching for a discontinued piece. Let the friendly customer service staff at Wheatley.com help you find the replacement part you need to repair your duplex or triplex or quintuplex plunger and piston pumps from Wheatley.
Wheatley.com Customer Service
At Wheatley.com, we supply our customers with the hard-to-find plungers, pistons, packing, valves, connecting rods and bearings they can't track down on their own. We serve national and international customers alike, and our business can be counted on for fast shipping and friendly assistance.
Tell us what you need? Our team is standing by to answer your questions.
