Seven Reasons for Using a Progressing Cavity Pump


Applications where a low NPSH is required, are very challenging for pump manufacturers. It is often necessary to take structural precautions to increase NPSHa values and thus ensure the safe operation of the pumps.To get more news about screw pump stator, you can visit hw-screwpump.com official website.

Especially in the oil and gas industry, liquids close to vapor pressure have to be conveyed regularly. Therefore, applications with low NPSHa are daily business. This requirement makes the design of pumping systems more complex. Often, either plant-side adjustments or NPSH optimized costly design adjustments have to be made to the pump system. By choosing the right pump technology however some complicating factors can be eliminated from the beginning. Often, progressing cavity pumps are only used for highly viscous or solid-laden media. However, they offer numerous advantages especially for applications with low NPSHa.

1 Very low NPSHr
Compared to other pump technologies progressing cavity pumps you can handle a very low NPSHa without expensive constructional adjustments. In the standard design, the values for horizontal pumps are well below 1.5 meters. With NPSHr optimized pump selections, values of well below 0.5m are possible.

2 Cost-effective and space-saving
Some pump types can only cope with a low NPSH in special versions or with special designs, resulting in high acquisition costs for you as a customer. The progressing cavity pump is often a more cost-effective alternative, as it already covers a wide range of NPSH critical applications in standard design. In addition, you can often use the progressing cavity pump in a horizontal design even with low NPSHa values. This saves additional costs for you compared to other pump types that are already designed submerged in these cases. Easy access for repair and maintenance work is guaranteed. Especially for larger installations, you no longer need to use cranes to lift submerged equipment. On-site adjustments to increase the NPSHa, such as installing pumping technology in shafts or the elevated installation of containers, are completely eliminated for you as a customer.

3 Handling changing viscosity and solids
You can handle media containing solids several centimeters in diameter with progressing cavity pumps. This is a decisive advantage for you in applications where solids are expected because other types of pumps often clog. Furthermore, you can cover a wide viscosity range with our progressing cavity pumps without losing efficiency.