Soft Seated or Metal Seated Ball Valves?
- Mar 04, 2019
- Hits: 399
There are two types of seat in a ball valves, soft seated and metal seated. Soft seated ball valves use a thermoplastic material such as PTFE, NBR etc. Metal seated ball valves use metal as seat material...
Introduction to Double Block and Bleed Valve
- Feb 26, 2019
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Double Block and Bleed Systems The primary function of a double block and bleed system is for isolation and the secondary function is for intervention. Under certain conditions double block and bleed...
Introduction to Bellow Sealed valves
- Feb 26, 2019
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Leakage at various points in pipelines found in chemical plants creates emissions. All such leakage points can be detected using various methods and instruments and should be noted by the plant engineer....
What are the causes of valve castings that are defective during the production process?
- Feb 20, 2019
- Hits: 93
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
- Hits: 1875
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
- Hits: 96
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...
-320x320.webp "NI-ALUMINIUM BRONZE butterfly valve")
NI-ALUMINIUM BRONZE butterfly valve
- Jan 21, 2019
- Hits: 122
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: 1264
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: 50
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
- Hits: 110
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: 327
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: 63
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...