Posted: 06/08/2015 15:43:57 Hits: 518
Ventilation butterfly valve is divided into manual transmission and electric transmission and its driving actuator can be drove by motor or turbine so that the disc can rotate freely within the range of 90 ° to achieve the opening and closing movement or regulating the flow of media.
Posted: 10/28/2014 16:55:36 Hits: 623
Hydraulic control valve should be installed the filter and also should convenient for the requirements of pollution discharge.
Hydraulic control valve is a kind of valve body that wet itself by water instead of being lubricated by adding engine oil. If the main parts within the king val...
Posted: 06/01/2015 11:01:04 Hits: 682
Eccentric semi-ball valve and flange valve belong to the same type of valve, but the difference is that the closure member of eccentric semi-ball valve is a sphere and this sphere can rotate around the center line of the body to achieve the open and close movement. Ball valves are mainly used for ...
Posted: 10/13/2014 16:10:07 Hits: 805
Two major points analyzing electric control butterfly valve installation:
1. Installation location, altitude and direction of import and export must comply with the design requirements. Pay attention to the medium flow direction which should be consistent with the body the direction of t...
Posted: 05/26/2015 09:05:31 Hits: 414
For pneumatic control valves, gas pressure relief valve is a necessary accessory which used mainly to reduce the pressure of air to a stable value, so that the control valve can obtain stable gas power for regulation. However, if the output pressure exceeds the limited pressure, the pipeline will ...
Posted: 09/22/2014 17:01:57 Hits: 654
Due to the wide application of electric butterfly valve, the service time inevitably influences its quality. However, is there a good way to maintain and protect them? Today, here we introduce about the relevant maintenance methods of electric butterfly valve.
1. Electric butterfly valve...
Posted: 01/08/2015 17:34:20 Hits: 720
For valve market distribution, the biggest user of valves is petrochemical industry, electric power department, metallurgy department, chemical industry and urban construction department mainly on the basis of the construction of the project.
It is analyzed that the main trend of valve ...
Posted: 08/28/2014 10:11:29 Hits: 628
Today's continuous progress in society economy and technology and constantly improvement of people's living standard promote the constantly upgrade of production technology. Thus, industrial production demand for various valve products is increasingly growing, for example, the sales of com...
Posted: 05/19/2015 16:38:55 Hits: 417
In the process of using a high vacuum butterfly valve, it will be often affected by temperature. And the following is the simple analysis:
1. Influenced by high temperature
After the relaxation of flange, bolts and gasket, the prestress of the bolts and the carrying capacity of flange...
Posted: 12/30/2014 17:10:00 Hits: 662
Connecting lever butterfly valve is a form of butterfly valve’s structure, which is mainly used in smelting blast furnace hot blast stove system and preheating furnace system. And it is applied in flue valve, gas cut-off valve, burning gas valve, combustion air shut-off valve, cold blast val...
Posted: 05/12/2015 13:51:29 Hits: 424
Problems of selector valve: the valve can not reverse or reverse slowly, gas leakage, failures of solenoid pilot operated valves and so on.
1. The selector valve can not reverse or reverse slowly. This failure is generally because of the bad lubrication, stuck or damaged spring; t...
Posted: 12/25/2014 16:55:12 Hits: 605
Here are eleven major technical characteristics of fully welded ball valve if you want to know more about fully welded ball valve.
1. The body structure of fully welded ball valve is welded. Therefore, there is no external leakage phenomenon happening.
2. The seat of fully welded ball ...
Posted: 05/05/2015 09:03:28 Hits: 443
1. The main reason for this is the expensive maintenance fee, so the operating managers do not maintain ball valves. Or lacking of scientific management and preventive maintenance, the valve will have a failure in advance.
2. Wrong operation and maintenance will also cause the leakage.
Posted: 12/19/2014 16:54:42 Hits: 647
Here are some main tips for installing the pneumatic butterfly valve we should notice.
1. Before installation, check whether pneumatic butterfly valve has missing parts or not. Ensure that each part model is correct. And there are no other objects within valve and it is clog-free in sol...
Posted: 04/22/2015 16:26:21 Hits: 423
1. The disc of safety valve doesn’t return back after the discharge.
This is mainly because of the bent stem or the disc is out of position, so you should assemble it again.
2. The leakage problem of safety valve
In normal working pressure, due to the dirt, there is leakage be...
Posted: 12/09/2014 16:08:48 Hits: 1015
There are so many aspects we need to note for spring safety valve installation.
First of all, before installing safety valve, be sure to test the seal performance. If there is relief valve leakage or breakage of air cushion, it is needed to change immediately. Then, we can get the best use of i...
Posted: 04/16/2015 16:26:19 Hits: 447
In China, multi-way valves are still in the process of research and development. So, compared with those valves which have been developed for a long period, multi-way valves will meet more troubles in normal use. The following is the analysis of these failures:
1. Noise caused by uneven...
Posted: 12/04/2014 16:48:18 Hits: 658
American standard safety valve in industrial production is used very frequently. This kind of safety valve has many advantages such as high cost-effectiveness, wide scope, as well as good safety protection. In addition, safety valve is also hard to avoid appearing some small faults in the lon...
Posted: 04/10/2015 11:59:26 Hits: 463
This technical article gives us brief introduction about the common failure and troubleshooting methods for electric drive butterfly valves.
Whether they are manual, pneumatic, hydraulic or electric, every part of these products should be strictly debugged before they leave the factory....
Posted: 04/03/2015 10:26:54 Hits: 937
In this technical article we will introduce the reasons, preventive measures and solutions for handweel inflexibility of gate valves from several aspects.
The Main Reasons:
1. Bent stem.
2. Lack of surface accuracy.
3. Thread damage because of hard operation.
4. Lack or the failu...
Posted: 03/31/2015 14:14:03 Hits: 655
1. Plug valves are often used for operation, and it is convenient to open and close quickly.
2. Small fluid resistance.
3. Simple structure, relatively small size and light weight. And it is easy to be maintained.
4. Good sealing performance.
5. No limitation for th...
Posted: 03/19/2015 16:46:05 Hits: 848
It can be divided into two parts to maintain control valve daily: patrol inspection and regular maintenance.
As for patrol inspection, please do these following works:
1. Check the supply energy (hydraulic oil or power) of control valve and its related accessories.
2. Check the syst...
Posted: 02/25/2015 17:08:23 Hits: 827
Ball valve serves mainly as cutting, distributing and changing the flow direction of medium. Ball valve is widely used in recent years as a new type of valve. It has the following advantages:
1. The fluid resistance is small, and its resistance coefficient is equal to the length of tubulatio...