• Jul , 04 2023

The fifth China Valve City Longwan International Valve Exhibition, which lasted for three days, was successfully concluded at the Wenzhou Olympic Convention and Exhibition Center on the afternoon of May 29th. More than 400 companies showcased their costumes at this exhibition, attracting 103 national merchants from Fujian, Tianjin, Shanghai, Jiangsu, Henan, Hebei, Beijing, Guangzhou, and internati...

• Jul , 04 2023

The purpose of using a check valve is to prevent reverse flow of the medium, and a check valve is generally installed at the outlet of the pump. In addition, a check valve should also be installed at the outlet of the compressor. In short, in order to prevent reverse flow of the medium, check valves should be installed on equipment, devices, or pipelines. Generally, vertical lift check valves are ...

• Jun , 29 2023

1.Purpose, performance, and characteristics Flat gate valves are a member of the gate valve family. Like wedge gate valves, their main function is to control the opening and closing of pipelines, rather than regulating the medium flow rate in the pipeline. Its advantages include low fluid resistance, labor-saving opening and closing, short structural length, and unrestricted flow direction of pipe...

• Jun , 29 2023

Centrifugal pump is one of the most commonly used pumps in water transportation. The elevation of the floor in the pump room depends on the installation height of the water pump. Correctly calculating the maximum allowable installation height of the water pump is of great significance to ensure safe water supply and save civil construction costs. In order to avoid the occurrence of cavitation, the...

• Jun , 27 2023

At present, butterfly valve, as a component used to realize on-off and flow control of Plumbing, has been widely used in many fields such as petroleum, chemical industry, metallurgy, hydropower and so on. In known butterfly valve technologies, the sealing form often adopts a sealing structure, with sealing materials such as rubber and polytetrafluoroethylene. Due to the limitations of structural c...

• Jun , 27 2023

A hydraulic pump is the power component of a hydraulic system, which is driven by an engine or electric motor to suck in oil from the hydraulic oil tank, form pressure oil, and discharge it to the actuator. 1. Gear pump: smaller in size, simpler in structure, less strict in oil cleanliness requirements, and cheaper in price; But the pump shaft is subjected to unbalanced force, severe wear, and sig...

• Jun , 25 2023

Corrosion has always been one of the most headache hazards for chemical equipment, with slight carelessness ranging from damage to accidents and even disasters. According to relevant statistics, about 60% of the damage to chemical equipment is caused by corrosion. Therefore, when selecting chemical valves, the first thing to pay attention to is the scientific selection of materials. There is usual...

• Jun , 25 2023

Prohibit 1 Hydraulic test shall be carried out under Negative temperature during winter construction. Consequence: Due to the rapid freezing inside the pipe during the hydraulic test, the pipe freezes out. Measures: Try to conduct a water pressure test before winter construction, and after the test, blow the water clean, especially the water inside the valve must be removed completely, otherwise t...

• Jun , 20 2023

Gate valves can be divided into: 1. Rising stem gate valve: The valve stem nut is placed on the valve cover or bracket. When opening and closing the gate, the valve stem nut is rotated to achieve the lifting and lowering of the valve stem. This structure is beneficial for the lubrication of the valve stem and has a significant degree of opening and closing, therefore it is widely adopted. 2. Non r...

• Jun , 20 2023

Ordinary electric motors are designed according to constant frequency and voltage, and cannot fully meet the requirements of frequency converter speed regulation. Therefore, they cannot be used as more frequency conversion motors 1、 The impact of frequency converters on motors mainly lies in their efficiency and temperature rise. The frequency converter can generate varying degrees of harmonic vol...