This line of pumps is offered in three modules:

Mono pump (one cylinder) rated at 150 gpm,

 

 

 

 

 

 

Duplex rated at 300 gpm (Video Demonstration)

 

 

 

 

 

 

Triplex rated at 450 gpm.

 

All ratings are based on 30 strokes per minute.
Fluid end parts are Gardner Denver clone parts - liners and pistons are the same as those in a 7 ½" x 10" Gardner Denver as are the rod and liner packings; valves and seats are the same as those in a 5 ½" x 10" GD. In each model, we offer a standard pressure version (rated for 400 psi) and a high-pressure version (rated for 800 psi). The hydraulic system requirements are as follows:

  • 20 gpm hydraulic oil per pump cylinder for the standard pressure model, 30 gpm per cylinder for the high-pressure model for maximum flow (1 cylinder on the mono pump, 2 cylinders on the duplex, 3 on the triplex)
  • Hydraulic oil pressure required is approximately 600 psi plus 8 times the fluid end discharge pressure on the standard model, or 600 psi plus 5.5 times the fluid end pressure on the high pressure model. Note: although the oil pressure is higher on the standard pressure model remember that it is only operating at 2/3 the oil flow rate as the high-pressure model.
  • Horsepower required for either model for a given amount pumped at a given pressure is the same and depends of course on flow rate and pressure but can be estimated as follows: mod gpm x mod psi divided by 1200 = horsepower required. Example: to pump 150 gpm at 250 psi (requires a mono pump) = 150 x 250 divided by 1200 = 37,500 divided by 1200 = 31.25hp required. For 275 gpm at 450 psi (requires a duplex) = 275 x 450 divided by 1200 = 23,750 divided by 1200 = 103.13 hp required.

The above simple rule-of-thumb formulas are for approximation; you should allow 10% or more as a safety margin. Gasoline engines should have twice the engine horsepower as the calculated load at operating RPM. Diesel engines should have 20% more horsepower than the calculated load at operating RPM. Hydraulic oil cooling can be accomplished easily and inexpensively by making a heat exchanger around the mud line. A 1 ½” or 2” larger pipe put around the mud line as a “jacket” makes a very efficient heat exchanger by routing the return hydraulic oil from the mud pump through this cooler (between the mud line and outer jacket pipe) before returning to the hydraulic oil reservoir. We recommend about an eight-foot long heat exchanger. Centerline Manufacturing can engineer, supply and install your hydraulic pump(s) and system, or will be glad to consult with your installer to assist in engineering your hydraulic system.