Introducing our revolutionary PTD type single-stage pIntroducing the PT Vertical Single-Stage Pipeline Circulation Pump! This electric pump is a cutting-edge product that has been designed based on strict performance standards and the company’s extensive production experience. With its compact structure and small volume, this pump not only boasts a beautiful appearance but also requires minimal installation space.ipeline circulation pump! Designed with the latest technology and engineered for maximum performance, this pump is a game-changer in the industry.