NEWS

Company News

Industry News

Technical Support

2021.03.26

Speaking of "valve", this article is a textbook

A valve that operates on its own based on the ability of the medium (liquid, gas) itself. Such as check valves, safety valves, regulating valves, traps, pressure reducing valves, etc.

read article

Speaking of "valve", this article is a textbook

2021.03.19

Do you know the top ten tips for anti-corrosion of metal valves?

Metal valves can be said to be key component structures that are prone to corrosion and failure in engineering equipment. Generally, the sealing surface, valve stem, diaphragm, small spring and other valve parts of metal valves are generally made of materials. The valve body, valve cover, etc. are suitable for two or three Materials. For valves used in high-pressure, highly toxic, flammable, explosive, and radioactive media, materials with little corrosiveness should be selected.

read article

Do you know the top ten tips for anti-corrosion of metal valves?

2021.03.05

Comprehensive pressure testing methods for various valves!

Under normal circumstances, industrial valves do not undergo strength tests when in use, but the valve body and valve cover after repair or those damaged by corrosion should undergo strength tests. For safety valves, their set pressure, backseat pressure and other tests should comply with the instructions and relevant regulations. The strength and tightness test should be carried out before the valve is installed. 20% of low-pressure valves shall be randomly inspected. If they are unqualified, 99.99% shall be inspected; medium and high-pressure valves shall be inspected 99.99%. Commonly used media for valve pressure testing include water, oil, air, steam, nitrogen, etc. The pressure testing methods for various industrial valves including pneumatic valves are as follows:

read article

Comprehensive pressure testing methods for various valves!

2021.01.29

Other troubleshooting of regulating valve

In order to improve the cutting effect, the two-position valve is usually used as a closed flow type. For liquid media, due to the flow-closing unbalanced force, the valve core is pressed closed, which has a closing effect, also known as a suction effect, speeding up the action of the valve core, resulting in a slight water hammer, causing system surge.

read article

Other troubleshooting of regulating valve

2021.01.21

Solution to regulating valve leakage

For valves that do not use sealing grease, consider adding sealing grease to improve the valve stem sealing performance.

read article

Solution to regulating valve leakage

2021.01.13

Anti-clogging (stuck) methods for regulating valves that are often stuck or clogged

Welding slag, rust, slag, etc. in the pipeline cause blockage or jamming in the orifice, guide part, and balance hole of the lower valve cover, causing strains and scratches on the curved surface of the valve core and guide surface, and indentations on the sealing surface. wait. This often occurs in newly put into operation systems and in the early stages of operation after overhaul. This is the most common failure.

read article

Anti-clogging (stuck) methods for regulating valves that are often stuck or clogged

2021.01.06

How to deal with common problems such as blockage, leakage, vibration, and loud noise of the regulating valve!

1. The inner wall of the valve body. For regulating valves used in situations with high pressure differences and corrosive media, the inner wall of the valve body is often impacted and corroded by the medium. The pressure resistance and corrosion resistance must be checked with emphasis.

read article

How to deal with common problems such as blockage, leakage, vibration, and loud noise of the regulating valve!

2020.07.22

A collection of 100 professional terms for valves

The strength performance of the valve refers to the valve's ability to withstand the pressure of the medium. Valves are mechanical products that withstand internal pressure, so they must have sufficient strength and rigidity to ensure long-term use without rupture or deformation.

read article

A collection of 100 professional terms for valves

2020.07.08

General classification of valves

Beginners to valves always mistake faucets for valves. In fact, this is not the case. Faucets strictly belong to the bathroom series. Valves are divided into gate valves, globe valves, butterfly valves, high-pressure valves, low-pressure valves, fluorine-lined valves, safety valves, pressure relief valves, anti-corrosion valves, filters, check valves, pressure reducing valves, overflow valves, ceramic valves, medium pressure valve, high temperature valve, low temperature valve, etc.

read article

General classification of valves
< 1234567 >

Welcome to negotiate consultation

021-66260866

Address: Floor 1, Building 1, No.21, Performance Road, Baoshan District, Shanghai
Telephone:021-56467898 
Mobile:17302165706Ms. Gu
         18501628796Manager Li
Fax: 021-66125728

Sweep the attention to us

Copyright©2024 Shanghai Longmeng Machinery Co., Ltd. www.300.cn SEO 

Business License