91丝袜在线观看亚洲_国产高清免费中文字幕_无码一区二区三区爆白浆_国产AV在线一区二区三区_一级a片无码高潮正版_亚洲精品中文字幕麻豆_观看免费毛片三区_精品国产欧美在线一区二区三区_亚洲日本欧美精品

Features of the emergency shut-off solenoid valve: Performance features: Butterfly piston, anti-corrosion and wear-resistant, single-ring seal, leakage prevention guide setting, fault elimination, instant power-on, rapid cut-off, self-holding open, manual reset, specially designed coil, ultra-long service life. Applications of the emergency shut-off solenoid valve: 1. Connect with fla

The sealing surface of a valve is its core component. The leakage forms of the sealing surface can generally be classified into several types, namely, leakage from the sealing surface, leakage from the connection between the sealing ring and the valve body, leakage caused by the detachment of the closing member, and leakage due to foreign substances embedded between the sealing su

Valves are usually connected to pipes in various ways such as threaded, flanged, welded, clamped, and ferrule wafer. So, how should one choose when using and selecting them? What are the connection methods between valves and pipes? 1. Threaded connection: Threaded connection is a form where the ends of the valve are processed into internal or external threads to connect with the

It is closely related to people's lives. Among them, various valve products with different functions have achieved a more secure and efficient good performance in actual use. Especially, fundamentally strengthening and improving water source management and usage has made water control valve products more diverse in features. Among them, effectively managing and improving management effic

Pneumatic control valves use compressed air as the power source, a cylinder as the actuator, and drive the valve with the help of valve positioners, converters and other accessories to achieve on-off or proportional regulation. They accept control signals from industrial automation control systems to complete the regulation of various process parameters such as flow, pressure and tempera

If you do not carefully check the usage condition and performance specifications of the wafer-type electric butterfly valve before installation, the wafer-type electric butterfly valve may have the following common faults: the valve cannot be reversed or the reversing action is slow, gas leakage, and the electromagnetic pilot valve is faulty, etc. (1) The inability or slow reversing act

Electric butterfly valve has the advantages and uses Electric butterfly valve is a very common pipeline flow regulation device, widely used, involved in many fields, such as the regulation of water flow in the reservoir dam of hydraulic power plant, industrial fluid flow regulation in the factory, etc., the following take you to understand the characteristics and advantages of electric

Steam trap in the steam heating system plays a role in preventing steam drainage, choose the right trap, can make the steam heating equipment to achieve the highest efficiency. In order to achieve the best results, it is necessary to have a comprehensive understanding of the working performance and characteristics of various types of traps. There are many varieties of traps, each with d

In the fluid piping system, the valve is the control element, its main role is to isolate the equipment and piping system, regulate the flow rate, prevent backflow, regulate and discharge pressure. Because it is very important to choose the most suitable valve for the pipeline system, it is important to understand the characteristics of the valve and the steps and basis for select

1. Valve stem corrosion and protection Main causes of valve stem corrosion: The corrosion damage of the valve body is mainly caused by the corrosive medium, and the valve stem corrosion problem is mainly the packing. Not only the corrosive medium causes corrosion damage to the valve stem, but also the steam and water can make the valve stem and the packing contact spot. In part

Fixed shaft ball valve is commonly used on natural gas pipelines, and its general inspection method is: turn the valve to the fully open or fully closed position, and check whether there is leakage through the discharge of the valve body drain nozzle. If it can be drained clean, it proves that the seal is good. If there is always pressure discharge, the valve can be considered to be leak

1. Inspection of appearance and logo Check content: whether the appearance of the valve has defects, such as cracks, bubbles, dents, etc. Check signage, nameplate and finish for compliance. Standards: International standards including API 598, ASME B16.34, ISO 5208, etc. Chinese standards include GB/T 12224 (general requirements for steel valves), GB/T 12237 (steel ball valv

Ball valve has many kinds of structure, but basically the same little difference, are the opening and closing parts for the round ball core, mainly by the valve seat, ball, sealing ring, stem and other driving devices, etc., through the stem rotation 90 degrees to achieve the opening and closing of the valve, in the pipeline for shutting off, distribution, adjust the flow size and change

In the thermal system, the thermal trap plays a very important role, and its performance directly affects the stability and energy efficiency of the steam system. As the key equipment in the steam system, the thermal trap can not only automatically remove condensate, prevent the occurrence of water hammer phenomenon, but also effectively prevent the leakage of steam to ensure the

Gate valves usually have single gate, double gate, wedge, parallel and other structural designs, in which wedge double gate (Z42, Z62 series) and wedge elastic gate (Z40, Z60 series) are the most widely used, the former is closed, the gate automatically fits both sides of the seat, automatically compensates the wedge Angle processing position error; The latter relies on the elasti