How to use steam valves, and what are the types of steam valves

Here are some of the well-known brands recognized in the valve industry, which are widely recognized and have a high reputation. While rankings may vary depending on time and market conditions, the following brands are generally considered to be among the top brands in the valve industry:

The following influential first-line brands of water system valves and industrial valves can be used as a reference, but for reference only: Suzhou Neway Valve, Shanghai Guanlong Valve, Shanghai Qizhong Valve, Sanhua, Su Yan, Shentong, Su Valve, Nanfang, Jiang.

First, the word Yao. The above manufacturers are only estimates and references, and the specific situation may vary or fluctuate at any time due to changes in a series of factors such as changes in the market, the size of the competition pattern, and the stability of product quality. As an indispensable key device in industrial production and civil facilities, the quality and reputation of the valve brand directly affect the satisfaction and trust of users.

These brands are known in the valve industry for their innovative technology, high-quality products and reliability. It is important to note that the market and industry are evolving rapidly, and different rankings may vary depending on time and region. For the most up-to-date ranking information, it is recommended to refer to industry reports, professional organizations or market research data for more detailed and accurate information.

Kiss! Hello, happy to answer your <>

The types of pro-steam valves are as follows: the temperature is less than 425 degrees can basically be selected: gate valves, globe valves, metal hard seal butterfly valves above 400 degrees, alloy valves, gate valves, mainly used for the main steam valve of the steam pipeline, that is, the valve globe valve that is not often switched, mainly used for the valve close to the equipment, because this valve has a better regulating effect on the flow of the steam pipeline The selection of the valve is mainly to see the temperature, pressure, function and installation position, the steam valve is generally cast by stainless steel and PTFE, It can be used in most gas, liquid, vapor and corrosive applications, and it comes with a radiator to protect the actuator and ensure a long life of the valve.

Hope mine can help you <>

Do you have any other questions?

Demonstration of the structure and opening and closing principle of the flange and globe valve commonly used in boiler steam and hot water pipelines.

Valves with a temperature of less than 425 degrees are basically available for steam pipelines: gate valves, globe valves, and metal hard-sealed butterfly valves. These valves are made of carbon steel WCB and can be used on pipes with steam temperatures below 425 degrees!

The categories of steam pipeline valves include: regulating valves, closed circuit valves, safety valves, gate valves, butterfly valves, globe valves, ball valves, valve bodies, valve stems, valve covers, valve discs, sealing surfaces, etc. The structural characteristics determine the structural characteristics of the installation, repair and maintenance of the steam pipeline valve, such as the structural length and overall height of the valve, and the connection form with the pipeline

Flange connection, clamp connection, threaded connection, external thread connection, welded end connection, etc. The forms of sealing surfaces of steam pipeline valves include: inlay ring, surfacing welding, threaded ring, spray welding, valve body body, etc.

Steam Pipeline Valves - Selection Steps.

Clarify the main purpose of steam pipeline valves in equipment or devices, determine their working conditions, applicable media, working pressure, working temperature, etc. Determine the nominal diameter and connection mode of the pipeline connected to the steam pipeline valve, and determine the mode of operating the steam pipeline valve: manual, electromagnetic, electric, pneumatic, hydraulic, electrical linkage, electro-hydraulic linkage, etc.

In the process of using the steam pipeline valve, the valve shell and trim material are determined according to the medium conveyed by the pipeline, the working temperature, the working pressure, etc. Determine the type of steam pipeline valve: globe valve, gate valve, ball valve, throttle valve, butterfly valve, safety valve, pressure reducing valve, steam trap, etc.

Gate valve. Before choosing, it is recommended to understand what the temperature of the steam is, in the case of the temperature does not exceed 420 degrees, you can choose the gate valve, the shut-off valve, the butterfly valve, the temperature is above 400 degrees, you can choose the alloy valve, there is a lot of room for choice. If it is used as the main valve and does not need to be opened and closed frequently, the gate valve can be the first choice, and if it is installed near the equipment, it is necessary to choose the shut-off valve, which can well regulate the air flow.

Precautions for buying valves:

1. The model of the valve should indicate the national standard number requirements according to it. If it is an enterprise standard, the relevant description of the model should be indicated.

2. The working pressure of the valve requires the working pressure of the pipeline, and the working pressure that the valve can withstand should be greater than the actual working pressure of the pipeline under the premise that Huaifeng does not affect the first grade; Any side of the valve should be able to withstand the working pressure value of the valve without leakage; When the valve is opened, the valve body should be able to withstand the requirement of twice the working pressure of the valve

3. The valve manufacturing standard should indicate the national standard number based on it, and if it is an enterprise standard, the enterprise documents should be attached to the procurement contract.

4. The hardness and strength of the stem bushing material should not be greater than the stem, and there should be no electrochemical corrosion with the stem and body under water immersion.

5. The nut material is made of cast aluminum brass or cast aluminum bronze, and the hardness and strength are greater than <> valve stem

Slowly open the valve in small amounts, wait for the temperature of the pipeline to rise to the steam temperature after the valve, the condensate in the pipeline is basically discharged, and the pressure on both sides of the valve is basically the same, and then slowly open the ridge of the whole shed. Be careful not to open the valve directly to avoid accidents. The way of opening the valve of the steam pipeline has a great impact on the pipeline, such as the steam pipeline has been shut down for a long time, the temperature of the pipeline has dropped to room temperature, the valve opens quickly, and a large amount of high-temperature steam quickly enters the pipeline, because the temperature of the pipeline is low, the reed and rot in the steam supply pipeline will produce a large amount of condensate water, which will be mixed with high-speed flowing steam, and the condensate will flow at high speed in the pipeline, impact the valves, elbows, etc., and produce water hammer, which will damage the pipe fittings and endanger the personal safety of the operator in serious cases.

Before opening the steam valve, open the trap valve on the pipeline for draining and draining. Turn on a small amount of steam, slowly control the temperature rise during the heating process, check the expansion of the pipe at each fulcrum, and check whether there is leakage in the weld, flange and other places. As the temperature rises, the group closes the trap valves.

Slowly open the steam valve and boost the pressure to normal pressure. After the pressure is raised to normal pressure, check whether there is leakage and expansion of the steam-based steam pipeline.

When water vapor. When there is a change, the steam pressure reducing valve must be sensed in the first time, and it must not be timed out, otherwise there is a high risk of a series of dangerous accidents. This is because steam pressure reducing valves can only be used in different environments with a high degree of flexibility.

The high accuracy of the steam pressure reducing valve can also adjust the water vapor in the first time, so it has brought convenience to countless users.

Steam control valves generally include: steam solenoid valves, regulating valves, and shut-off valves will be installed in front of the valve.

Theoretically, the shut-off valve is always in the normally open state, and the steam solenoid valve or regulating valve controls the opening and closing according to the power supply or voltage signal. Under the normal operation of the control valve, the opening and closing of the collapse steam valve is safe.

Alloy selection valves above 400 degrees.

Gate valves are mainly used for the main steam valve of steam pipelines, that is, valves that are not often opened and closed.

The globe valve is mainly used for the valve close to the equipment, because this valve has a good regulating effect on the flow.

The selection of valves for steam pipelines mainly depends on the temperature, pressure, function and installation location.

Can butterfly valves be used on steam pipes? The answer is no.

Because the internal pressure of the butterfly valve is large, the switch is difficult to operate, and it is easy to damage the sealing surface, so it cannot be opened and closed frequently, and it is inferior to the gate valve in terms of performance;

There are two types of valves that need to be installed in the home improvement pipeline.