What are the causes of valve castings that are defective during the production process?
- Feb 20, 2019
- Hits: 66
1. Porosity This is a small cavity formed by the gas that does not escape during the solidification process of the metal, which has a smooth inner wall, contains a gas, and has a high reflectance to the...
Rising Stem Gate Valve VS Non-rising Stem Gate Valve
- Feb 19, 2019
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According to the structure of valve stem, gate valve can be divided into Rising Stem Gate Valve and Non-rising Stem Gate Valve. 1. Rising Stem Gate Valve: The stem nut is on the bonnet or yoke....
Valve Type Selection Guide
- Jan 21, 2019
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Selection Guide TYPE FUNCTION DESIGN ADVANTAGES DISADVANTAGES Gate (wedge) On/off A straight-through valve incorporating a rising- wedge gate. Widely used on water duties but can be...
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NI-ALUMINIUM BRONZE butterfly valve
- Jan 21, 2019
- Hits: 80
JONLOO is going to deliver NI-ALUMINIUM BRONZE(C95800) butterfly valves to our European client. Aluminum bronze is the highest strength standard copper based alloy and is used...
PRESSURE SEAL BONNET DESIGN
- Jan 19, 2019
- Hits: 1124
Pipeline Valve gate, globe and check valves are available with pressure seal bonnets in 900 to 2500 class. The pressure seal design is superior to the bolted design. With the bolted body design, as pressure...
VALVE TYPES
- Jan 19, 2019
- Hits: 30
There are a large variety of valves and valve confi gurations to suit all services and conditions; different uses (on/off, control), different fluids (liquid, gas etc; combustible, toxic, corrosive etc)...
APPLICATIONS - VALVE SEAT/SEAL MATERIALS
- Jan 16, 2019
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One of the most important factors affecting shutoff capability is the nature of media being handled. Service life is affected by all of the following factors: - pressure, temperature, degree of pressure...
MATERIAL SPECIFICATIONS - BALL VALVES
- Jan 16, 2019
- Hits: 256
BODY AND TRIM MATERIAL CARBON STEEL • ASTM A105 LOW TEMPERATURE CARBON STEEL • ASTM A350 LF2 LOW ALLOY STEEL • ...
Valve Material Types
- Jan 05, 2019
- Hits: 35
COMMON METAL TYPES USED IN VALVE MANUFACTURE The following is a general review of common valve materials used in general industrial, commercial and process valve construction. Go to the Technical section...
ISO/API/ASME MANUFACTURING STANDARDS
- Jan 04, 2019
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ISO/API/ASME MANUFACTURING STANDARDS ISO 15761 has been recently published as part of an international effort to standardise the products for petroleum and natural gas industries. The following table...
VALVE TEST STANDARDS
- Jan 04, 2019
- Hits: 1132
COMMON VALVE TYPES & RELATED TEST STANDARDS Valve type Common test standard Steel ball, gate, globe and check valves API 598 Steel ball, gate, globe and check valves BS 6755*, ISO 5208...