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Flush Pumps

Industrial Duty Flushed Manifold Pumps for Low Lubricity and High Temperature Applications
Photo of Flush Pumps

Flush pumps are used for low lubricity liquids (Deionized water) and liquids with elevated temperatures. Like all standard plunger pumps, a flushed manifold pump is configured with an inlet and outlet port. However, on a flushed manifold pump, the manifold is also designed with an inlet and outlet flushing port to circulate liquid between the high pressure and low-pressure seals to extend seal life and reduce pump maintenance. Cat pumps flush-style pump models are indicated with the letter “C” or “K” at the end of the model number (i.e., 781K).

Benefits of flushed manifold pumps include:

  • Greatly increases seal life when used with low lubricity fluids such as deionized (Di) water
  • Cools seals, which extends seal life in applications with elevated pumped liquid temperatures
  • Reduces thermal load on ceramic plungers, reducing likelihood of cracking or pitting
Solid Shaft / 316 Stainless Steel
Model Max GPM Max LPM Max PSI Max BAR RPM
784KM 2.90 11.00 5000 345 1750
301C 3.20 12.10 2200 152 1725
341C 4.00 15.10 1800 124 1725
311C 4.00 15.10 2200 152 950
781KM 4.70 17.80 5000 345 1750
781K 4.70 17.80 5000 345 1750
351C 5.00 18.90 1500 103 1725
1051C 10.00 37.90 2200 152 958
661C 10.00 37.90 3000 207 1429
3801K 10.00 37.90 5000 345 915
7CP6171CCS 10.50 39.70 2000 138 1450
7CP6111CCS 10.50 39.70 2000 138 1750
1051C - ALT SPEC 12.30 46.60 1800 124 1180
3811K 14.00 53.00 3000 207 800
3511C 14.00 53.00 3000 207 800
6811K 15.00 56.80 5000 345 630
6801K 15.00 56.80 7000 483 630
1541C 19.30 73.00 1200 83 1180
2531C 25.00 94.60 1200 83 1025
2831K 25.00 94.60 1200 83 1025
3521CHS 25.00 94.60 2000 138 870
3821KHS 25.00 94.60 2000 138 870
6821K 25.00 94.60 3000 207 615
3831KHS 36.00 136.30 1200 83 800
3831KHS - ALT SPEC 40.00 151.00 2000 138 888
6831K 40.00 151.40 2300 159 625
6835K 40.00 151.40 3000 207 625
3541CHS 45.00 170.00 1000 69 765
3841KHS 45.00 170.30 1000 69 765
6841K 48.00 181.70 2000 138 615
3541CHS - ALT SPEC 50.00 189.00 1500 103 850
3841KHS - ALT SPEC 50.00 189.00 1500 103 850
6861K 60.00 227.10 1200 83 520
Solid Shaft / 304 Stainless Steel
Model Max GPM Max LPM Max PSI Max BAR RPM
1810K 3.00 11.40 10000 689 1500
Solid Shaft / Nickel Aluminum Bronze
Model Max GPM Max LPM Max PSI Max BAR RPM
3507CHS 10.00 38.00 5000 345 915
3517CHS 14.00 53.00 3000 207 800
Solid Shaft / Brass
Model Max GPM Max LPM Max PSI Max BAR RPM
1530C 15.60 59.00 1500 103 1450
1540EC 19.30 73.00 1200 83 1180
2520C 25.00 94.60 800 55 772
3520C 25.00 94.60 2000 138 870
3570C 30.00 113.60 2500 170 1080
3535C 36.00 136.30 1200 83 800
Solid Shaft / Duplex Stainless Steel
Model Max GPM Max LPM Max PSI Max BAR RPM
67102C - ALT SPEC 80.00 302.80 1200 83 540
67102C 100.00 378.50 1000 69 680
152R060C 115.00 435.30 1200 83 360
152R080C 200.00 757.00 1200 83 355
152R100C 240.00 908.40 1000 69 270