跳至主要内容
NAFCO | Bending Test of Brass Ball Valves
From: NAFCO | Brass Ball Valves Manufacturer China
Bending Test is to check the torgue strength of brass ball valves from vertical side, it's very basic test for brass ball valves.
There two ways of arrangements for bending Test of Brass Ball Valves: for straight brass ball valve and angel brass ball valves.
Arrangement for bending Test of Brass Ball Valves
1. Bending moment MF1 at the axis of the closure member
a) Use the same brass ball valve and the same arrangement as for the torque test;
b) apply force F, for 10 s at 1 m from the axis of the closure member so that the bending moment MF1 is
produced;
c) with the stress removed, measure the external and internal leak-tightness
Bending moments of brass ball valves
The stress MF1 represents the installation stress.
The stress MF2 represents the stress to which the valve may be submitted during service.

2. Bending moment MF2 at the axis of the closure member
a) Apply MF2 (see Table 9) for 900 s to the same valve as for the bending moment test MF1;
b) during this time the internal and external leak-tightness and operating torque are measured.
The brass ball valves shall not be broken physically, or not leak in hydro pressure test afterwards. Otherwise it will be indentified as inqualified products.

Brass ball valves China
NAFCO is a quality China brass valve manufacturer and supplier, have full line of brass valves China, brass ball valves, brass gate valves,brass radiator valves, brass angle valves, as well as relevant brass fittings. we supply kinds of brass valves and brass pipe fittings with reliable and stable quality, you are welcome to inquiry with us at sales@acrofluid.com.
 
 

评论

发表评论

此博客中的热门博文

NAFCO | Brass Safety Valves for Water Heater

New Brass Safety Valves for Water Heater Time:2019-04-03 From: NAFCO | Brass Valve Manufacturer China As a professional brass valve manufacturer, We NAFCO always keep research and developement of new products, to meet requirements from different customers' demands and applications, representing latest technology for brass valves such as brass ball valves, brass gate valves, radiator valves, brass fittings.   We newly develpoed a new seires of brass safety valve for water heater, specially designed low pressure water system, forged brass valve body,  rating pressure 0.8MPa   Overall View:     Front Side View:   Back Side View:   Inlet Size View:   With a cross design, to stop pipes or hoses getting inside, protect the valve structure and safety     Outlet Side View: With NBR seat for better seal and avoid leakage   What is a water heater safety valve?   The water ...
1 条评论
阅读全文

NAFCO | How to Select China Brass Valve Material

In Previous articles, we discussed about Quality factors of China brass ball valves and Quality Test for China Brass Ball Valves, as an important part of the quality, materials play a critical role, especially for brass valve performance and healthy considerations. There’re four main aspects to Select China Brass Valve Material: 1. Healthy consideration: Lead (Pb) is a kind of chemical that can dissolve and contaminate water, and make affect the health of people, such as mental health of children. Materials that have high lead rate are not suitable and avoided for drinking water system. 2. Applications of valves: working pressure, working temperature, flow media type. 1. Generally speaking material with more copper(Cu) content has better extensibility, and will stand for higher working pressure and temperature, impurities like Fe, Mn, Sn is not stable for brass material physical function...
发表评论
阅读全文

NAFCO | Technical Requirements Should Attention When Purchasing Brass Valves

NAFCO | Technical Requirements Should Attention When Purchasing Brass Valves  From: NAFCO | Brass Valves China Manufacturer Today we talk about the technical requirements should attention when purchasing brass valves, it's extremely imoirtant to ensure every details before purchasing, to avoid any further problems after installation and uses.     1. The specifications and categories of brass valves should meet the requirements of the pipeline design documents   1.1 The model of the brass valve should indicate the national standard numbering requirements. If it is an enterprise standard, the relevant description of the model number should be indicated.   1.2 The working pressure of the brass valve requires ≥ the working pressure of the pipeline. Under the premise of not affecting the price, the working pressure of the brass valve should be greater than the actual working pressure of the pipeline; any side of the brass valve should be close...
发表评论
阅读全文