GASO 1757 Duplex Piston Pump
IEQ is an OEM supplier of the GASO 1700 Pump. Let the friendly customer service staff at IEQ Industries help you find the GASO Pump you need.

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Specifications
Pump Size:
maximum piston size x stroke length, in.(mm)
5-1/2 x 10 (139.7 x 254.0)
Rated BPH:(kW) at 85 RPM (Crankshaft speed)
127 (95)
Rated piston load: pounds (kg)
13100 (5942)
Maximum discharge pressure: psi (kPa)
1750 (12066)
Pinion Gear Ratio:
5.846:1
Pinion shaft extension:
Diameter, in.(mm): 2.938 (74.61)
Length, in.(mm): 13.750 (349.25)
Keyway width x depth, in.(mm):
3/4 x 3/8 (19.1 x 9.5)
Maximum recommended sheave diameter, in.(mm):
50 (1270)
For larger sheave diameters: Contact IEQ
Oil Capacity: gallons (L)
15.0 (56.8)
Weight: pump only on wood shipping skids, pounds (kg)
6125 (2778)
Standard Materials for Fluid End Bodies:
Cast Steel
Cast Ductile Iron
Pump Model | Flange Connections | Dimensions (Inches) | ||||||||
Discharge Connection Sizes | Suction Connection Sizes | By-Pass Connection Sizes | A | B | C | D | E | F | G | |
1757 | 3 (76.2)-ANSI 600 FF | 4 (101.6)-ANSI 150 FF | None | 8 1/4 | 10 | 38 1/2 | 73 3/8 | 111 7/16 | 13 5/8 | 13 1/4 |
Performance Data
PUMP | English Units | 25 RPM | 40 RPM | 55 RPM | 70 RPM | 85 RPM | |||||||||
Piston Dia. In. | Piston Area Sq. In. | BPD per RPM | GPM per RPM | Max. Press. PSI | BPD | GPM | BPD | GPM | BPD | GPM | BPD | GPM | BPD | GPM | |
1757 (1742) (1755) |
2.500 | 4.9087 | 23.9280 | 0.6979 | 1750 | 599 | 17.4 | 958 | 27.9 | 1317 | 38.4 | 1675 | 48.9 | 2034 | 59.3 |
3.000 | 7.0686 | 36.6960 | 1.0703 | 1750 | 918 | 26.8 | 1468 | 42.8 | 2019 | 58.9 | 2569 | 74.9 | 3120 | 91.0 | |
3.500 | 9.6211 | 51.9120 | 1.5141 | 1362 | 1298 | 37.9 | 2077 | 60.6 | 2856 | 83.3 | 3634 | 106.0 | 4413 | 128.7 | |
4.000 | 12.5664 | 69.3360 | 2.0223 | 1042 | 1734 | 50.6 | 2774 | 80.9 | 3814 | 111.2 | 4854 | 141.6 | 5894 | 171.9 | |
4.500 | 15.9043 | 89.2080 | 2.6019 | 824 | 2231 | 65.0 | 3569 | 104.1 | 4907 | 143.1 | 6245 | 182.1 | 7583 | 221.2 | |
5.000 | 19.6349 | 111.288 | 3.2459 | 667 | 2783 | 81.1 | 4452 | 129.8 | 6121 | 178.5 | 7791 | 227.2 | 9460 | 275.9 | |
5.500 | 23.7583 | 135.840 | 3.9620 | 551 | 3396 | 99.1 | 5434 | 158.5 | 7472 | 217.9 | 9509 | 277.3 | 11547 | 336.8 | |
Brake Horsepower required | 37 | 60 | 82 | 105 | 127 |
PUMP | Metric Units | 25 RPM | 40 RPM | 55 RPM | 70 RPM | 85 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. | |
1757 (1742) (1755) |
64 | 31.669 | 0.1585 | 0.0440 | 12066 | 4.0 | 1.1 | 6.3 | 1.8 | 8.7 | 2.4 | 11.1 | 3.1 | 13.5 | 3.7 |
76 | 45.604 | 0.2431 | 0.0675 | 12066 | 6.1 | 1.7 | 9.7 | 2.7 | 13.4 | 3.7 | 17.0 | 4.7 | 20.7 | 5.7 | |
89 | 62.072 | 0.3439 | 0.0955 | 9388 | 8.6 | 2.4 | 13.8 | 3.8 | 18.9 | 5.3 | 24.1 | 6.7 | 29.2 | 8.1 | |
102 | 81.073 | 0.4593 | 0.1276 | 7188 | 11.5 | 3.2 | 18.4 | 5.1 | 25.3 | 7.0 | 32.1 | 8.9 | 39.0 | 10.8 | |
114 | 102.608 | 0.5909 | 0.1642 | 5679 | 14.8 | 4.1 | 23.6 | 6.6 | 32.5 | 9.0 | 41.4 | 11.5 | 50.2 | 14.0 | |
127 | 126.677 | 0.7371 | 0.2048 | 4600 | 18.4 | 5.1 | 29.5 | 8.2 | 40.5 | 11.3 | 51.6 | 14.3 | 62.7 | 17.4 | |
140 | 153.279 | 0.8998 | 0.2500 | 3802 | 22.5 | 6.2 | 36.0 | 10.0 | 49.5 | 13.7 | 63.0 | 17.5 | 76.5 | 21.2 | |
Kilowatts required | 28 | 45 | 61 | 78 | 95 |
GASO 1759 Duplex Piston Pump

Specifications
Pump Size:
maximum piston size x stroke length, in.(mm)
7-1/2 x 10 (190.5 x 254.0)
Rated BPH:(kW) at 85 RPM (Crankshaft speed)
130 (97)
Rated piston load: pounds (kg)
13100 (5942)
Maximum discharge pressure: psi (kPa)
1042 (7184)
Pinion Gear Ratio:
5.846:1
Pinion shaft extension:
Diameter, in.(mm): 2.938 (74.61)
Length, in.(mm): 13.750 (349.25)
Keyway width x depth, in.(mm):
3/4 x 3/8 (19.1 x 9.5)
Maximum recommended sheave diameter, in.(mm):
50 (1270)
For larger sheave diameters: Contact IEQ
Oil Capacity: gallons (L)
15.0 (56.8)
Weight: pump only on wood shipping skids, pounds (kg)
7012 (3181)
Standard Materials for Fluid End Bodies:
Cast Steel
Cast Ductile Iron
Pump Model | Flange Connections | Dimensions (Inches) | ||||||||
Discharge Connection Sizes | Suction Connection Sizes | By-Pass Connection Sizes | A | B | C | D | E | F | G | |
1759 | 4 (101.6)-ANSI 600 FF | 6 (152.4)-ANSI 150 FF | 3 (76.2)-ANSI 600 FF | 11 3/8 | 11 3/4 | 43 1/2 | 74 5/8 | 111 15/16 | 17 5/8 | 12 1/2 |
Performance Data
PUMP | English Units | 25 RPM | 40 RPM | 55 RPM | 70 RPM | 85 RPM | |||||||||
Piston Dia. In. | Piston Area Sq. In. | BPD per RPM | GPM per RPM | Max. Press. PSI | BPD | GPM | BPD | GPM | BPD | GPM | BPD | GPM | BPD | GPM | |
1759 (1743) (1753) |
4.000 | 12.5664 | 69.3360 | 2.0223 | 1042 | 1734 | 50.6 | 2774 | 80.9 | 3814 | 111.2 | 4854 | 141.6 | 5894 | 171.9 |
4.500 | 15.9043 | 89.2080 | 2.6019 | 824 | 2231 | 65.0 | 3569 | 104.1 | 4907 | 143.1 | 6245 | 182.1 | 7583 | 221.2 | |
5.000 | 19.6349 | 111.288 | 3.2459 | 667 | 2783 | 81.1 | 4452 | 129.8 | 6121 | 178.5 | 7791 | 227.2 | 9460 | 275.9 | |
5.500 | 23.7583 | 135.840 | 3.9620 | 551 | 3396 | 99.1 | 5434 | 158.5 | 7472 | 217.9 | 9509 | 277.3 | 11547 | 336.8 | |
6.000 | 28.2743 | 162.576 | 4.7418 | 463 | 4065 | 118.5 | 6504 | 189.7 | 8942 | 260.8 | 11381 | 331.9 | 13819 | 403.1 | |
6.500 | 33.1830 | 191.664 | 5.5902 | 395 | 4792 | 139.8 | 7667 | 223.6 | 10542 | 307.5 | 13417 | 391.3 | 16292 | 475.2 | |
7.000 | 38.4845 | 223.200 | 6.5100 | 340 | 5580 | 162.8 | 8928 | 260.4 | 12276 | 358.1 | 15624 | 455.7 | 18972 | 553.4 | |
7.500 | 44.1786 | 257.040 | 7.4970 | 297 | 6426 | 187.4 | 10282 | 299.9 | 14138 | 412.3 | 17993 | 524.8 | 21849 | 637.2 | |
Brake Horsepower required | 38 | 61 | 84 | 107 | 130 |
PUMP | Metric Units | 25 RPM | 40 RPM | 55 RPM | 70 RPM | 85 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. | |
1759 (1743) (1753) |
102 | 81.073 | 0.4593 | 0.1276 | 7184 | 11.5 | 3.2 | 18.4 | 5.1 | 25.3 | 7.0 | 32.1 | 8.9 | 39.0 | 10.8 |
114 | 102.608 | 0.5909 | 0.1642 | 5679 | 14.8 | 4.1 | 23.6 | 6.6 | 32.5 | 9.0 | 41.4 | 11.5 | 50.2 | 14.0 | |
127 | 126.677 | 0.7371 | 0.2048 | 4600 | 18.4 | 5.1 | 29.5 | 8.2 | 40.5 | 11.3 | 51.6 | 14.3 | 62.7 | 17.4 | |
140 | 153.279 | 0.8998 | 0.2500 | 3802 | 22.5 | 6.2 | 36.0 | 10.0 | 49.5 | 13.7 | 63.0 | 17.5 | 76.5 | 21.2 | |
152 | 182.415 | 1.0769 | 0.2992 | 3194 | 26.9 | 7.5 | 43.1 | 12.0 | 59.2 | 16.5 | 75.4 | 20.9 | 91.5 | 25.4 | |
165 | 214.084 | 1.2695 | 0.3527 | 2722 | 31.7 | 8.8 | 50.8 | 14.1 | 69.8 | 19.4 | 88.9 | 24.7 | 107.9 | 30.0 | |
178 | 248.286 | 1.4784 | 0.4107 | 2347 | 37.0 | 10.3 | 59.1 | 16.4 | 81.3 | 22.6 | 103.5 | 28.8 | 125.7 | 34.9 | |
191 | 285.023 | 1.7026 | 0.4730 | 2044 | 42.6 | 11.8 | 68.1 | 18.9 | 93.6 | 26.0 | 119.2 | 33.1 | 144.7 | 40.2 | |
Kilowatts required | 28 | 46 | 63 | 80 | 97 |
For operation below 54 RPM, an auxiliary lubrication system is required.
RPM shown is Crankshaft speed. For Pinion Shaft speed, multiply RPM by Gear Ratio. Volumetric Rate is based on 100% Volumetric Efficiency. Brake Horsepower/Kilowatts Required is based on 85% Mechanical Efficiency.