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17

2020-04

【Technical article】 Rules for selection of valves in water works

The valves are indispensable for the conventional water production process in water plant, such as raw water intake
10

2020-04

【Technical article】 Common materials and corresponding designations for valves

Commonly used valve material: The valve body, bonnet and gate (disc) are one of the main parts of the valve and bear medium pressure directly.
27

2020-03

【Technical article】 How is the valve routinely maintained?It's not a good idea to read all this.

Leakage of valve body and bonnet: Causes: 1. Low casting quality of cast iron, defects of sand eyelet, loose structure and slag inclusion on valve body and bonnet body 2. Freezing cracking within days;
13

2020-03

【Technical article】 Structure and principle of high performance butterfly valve

High performance rubber liner butterfly valve is a well-structured butterfly valve, which is especially suitable for regulating or switching the flow and pressure of various tap water...
14

2019-12

【Technical article】 Valve operating procedures

1. The handwheel and handle of manual valve are designed according to the hand force of ordinary people, considering the strength of sealing surface and necessary closing force...
07

2019-12

【Technical article】 The corresponding method is adopted to control the deformation in a small range as far as possible

Heat treatment technology is an important means to obtain good properties of various metal materials.In many practical applications, reasonable selection of materials and various forming processes can not meet the mechanical properties...
23

2019-11

【Technical article】 Certification and testing of valves and actuators

ISO 9001 quality system certification, ISO 14001 environmental management system certification, OHSAS 18000 occupational health and safety management system certification, eu CE certification, pressure vessel PED directive, API certification...
31

2019-10

【Technical article】 Technical performance of drainage engineering valves

The strength of the valve is the ability of the valve to withstand medium pressure.Valves are mechanical products under internal pressure and must have sufficient strength and stiffness to ensure long-term use without breaking or deformation.
24

2019-10

【Technical article】 Analysis and research on performance test of backflow preventer

The function, structure characteristic and performance test of backflow preventer are introduced.
16

2019-10

【Technical article】 Description of the characteristics of all kinds of universal valves and special valves

The characteristics and applications of all kinds of universal valves and special valves are simply described

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