liquid reflections

1、 Flow coefficient of the valve the flow coefficient of the valve is an index to measure the flow capacity of the valve. The larger the flow coefficient, the smaller the pressure loss when the fluid flows through the valve. Most valve manufacturers in foreign industrial developed countries include the flow coefficient values of valves with different pressure grades, different types and different nominal diameters in their production

1、 Overview of safety valve knowledge
Safety valve is an important safety accessory of boiler, pressure vessel and other pressure equipment. Its action reliability and performance are directly related to equipment and personal safety, and are closely related to energy saving and environmental protection.
2、 The definition of safety valve broadly speaking, the so-called safety valve includes relief valve

1、 Foreword
At present, the sealing forms that have been successfully applied in industry include oil film seal, mechanical seal, dry gas seal, etc. various forms have their unique advantages and disadvantages, and each has its own specific application range. Mechanical seal is still widely used in petroleum industry because of its various materials, corrosion resistance, excellent and reliable performance

Abstract: the unloading performance characteristics of multi-channel combined directional valve commonly used in engineering are analyzed, and the design method of unloading valve widely used in engineering is briefly introduced. Key words: multi-channel combined directional valve; Unloading performance; Unloading valve design
introduction
The multi-channel combined directional valve has the advantages of compact structure, convenient centralized operation and short oil circuit

Introduction to electric full rubber lined butterfly valve: the butterfly plate of rubber lined butterfly valve is installed in the diameter direction of the pipeline. In the cylindrical channel of the butterfly valve body, the disc-shaped butterfly plate rotates around the axis with a rotation angle of 0 ° ~ 90 °. When it rotates to 90 °, the butterfly valve is fully open. This kind of rubber lined butterfly valve shall be installed horizontally in the pipeline.

The zyb-b adjustable high-pressure gear oil pump is equipped with an adjustable gear end clearance structure. When the working pressure drops after the pump works for a certain time, the end clearance of the gear in the pump can be adjusted through the external fine-tuning structure on the pump cover, so that the working pressure of the high-pressure gear pump can be restored and adjusted for several times. So it

1. Air leakage of the hand brake valve when the hand brake valve is set to the “parking brake” position, the hand brake valve continues to leak air from the exhaust port. Generally speaking, it is caused by the lax sealing between the inlet valve and the valve seat, or the existence of foreign matters between the valve and the valve seat, or the damage of the seal of the inlet valve. Replace the air inlet valve seal with the repair kit. Stop

There are many kinds of valve products, and the statements are not completely unified. Some are divided by purpose (such as chemical industry, petroleum, power station, etc.), some by medium (such as steam and air valve), some by material (such as cast iron valve, cast steel valve, forged steel valve, etc.), some by connection form (such as internal thread, flange valve, etc.), and some by temperature

Main relevant professional standards adopted for water pump:
1. Is02858-1975 (E) axial suction centrifugal pump (16bar grade): one mark, rated performance point and size. Note: the marking and rated performance point standard are adopted by reference, but its range is greatly expanded. Specifically, the pump diameter range specified in is02858 is Dg50-

Features and application of stainless steel butterfly valve: the soft seal wafer type pneumatic stainless steel butterfly valve is applicable to the occasions where the temperature is ≤ 150 ℃ and the nominal pressure is ≤ 1.6Mpa for regulating flow and intercepting medium on water supply and drainage and gas pipelines such as food, medicine, chemical industry, petroleum, electric power, light textile and papermaking. The main features of stainless steel butterfly valve are: 1. Small