A: Progressive cavity (PC) pumps are positive displacement pumps that handle fluids gently with only minimal shear or turbulence.To get more news about magnetic drive pumps accessories, you can visit brysonpump.com official website.

They are suitable for fluids with very high viscosities and the highest solids content, even large or abrasive particles. They can deliver high pressure of 48 bar or more.
Even high vapour pressure (low NPSH) or multiphase fluids are not a problem. With their linear curve and minimal pulsation, they are also suitable for dosing applications.

In the oil and gas industry PC pumps are often used to convey sludge or oily water, or in situations where light hydrocarbons raise the vapour pressure to a level where other pump types would cavitate.

PC pump manufacturers offer a wide range of products for this industry, from dosing and open hopper pumps to semi-submersible pumps or package solutions that allow for automatic control.

One strength of PC pumps is their vertical semi-submersed installation on a drum. Open/closed drain drums or flare knockout drums are other frequent applications.

Q: How do these pumps meet the stringent requirements of American Petroleum Institute (API) 676 standards?

A: Since PC pumps were originally used in wastewater treatment plants, their design and production are optimised for this market. They can also be used in petrochemical applications, albeit the much higher demands are a challenge.

The modifications and upgrades necessary to adapt standard PC pumps for use in the petrochemical industry has a dramatic effect on both price and lead time. The most customisation is required for the casing design and shaft seals.

Among other criteria, the casing design needs to have fully ASME compliant flanges, higher nozzle loads, flanged casing drain and a design pressure (MACP) able to achieve higher containment pressure for upset conditions. Shaft seals also need to be engineered to meet API 682 requirements. A few PC pump manufacturers have risen to the challenge.

Q: What is the best option when purchasing a PC pump for oil and gas applications?

A: To provide project engineers with smooth sailing and purchasers with favourable prices and lead time, some PC manufacturers have designed and produced API 676 conforming pumps.

They fulfil the casing and shaft seal requirements, while being built with materials suitable for highly corrosive and harsh environments. PC manufacturers use their many years of experience to create and produce solutions that help customers save time and money.