Application of Differential Pressure Control Valve in Double Tube Heating

Abstract: In this paper, three application schemes of differential pressure control valve in double-pipe household heating system are analyzed and the principle of selection of each scheme is given. It is pointed out that double-pipe heating system of household metering is under design conditio

China's nitric acid equipment has been fully domesticated

The reporter learned from Liaoyang Petroleum and Chemical Fiber Company that the Liaoyang Petrochemical Company's 111,000 tons/year dilute nitric acid and 40,000 tons/year concentrated nitric acid plant designed by the Second Design Institute of Chemical Industry had been put into operatio

February 20 Steel Market Price Quotes

Product Name Specification Material Steel/Origin Price (Yuan/Ton) Yesterday Last Week Last Month General Line Φ6.5/8mm Q235 Handan Steel 4650 50 350 410 High Line Φ6.5/8mm Q235 Handan Steel 4700 70 350 380 High Line Φ6.5/8mm Q235 New Gold 4700 50 350 380 High Line Φ6.5mm Q235 Lich

Instrumentation Quotes

According to the national new national economic classification standard, the instrumentation industry has 20 sub-categories, which are generally classified according to application or technology. However, it is sometimes difficult to distinguish between tec

Centrifugal pump principle introduction

First, the basic structure of the centrifugal pump

The basic structure of the centrifugal pump is composed of six parts are the impeller, pump body, pump shaft, bearings, seal rings, stuffing box.

1, the impeller is the core part of the centrifugal pump, its speed is high, t