How do you measure a ball valve?
The nominal diameter is indicated on the body of the valve in inches or by “DN” followed by the value ismm unit of measure, which corresponds to the size expressed in the inches 34 inch is the equivalent of DN20. The port diameter is determined by the effective diameter.
Are there different size ball valves?
Sizes typically range from 0.2 to 48 inches (5.1 to 1,219.2 mm). Valve bodies are made of metal, plastic, or metal with a ceramic; floating balls are often chrome plated for durability. Another option for cold climates is the “freeze tolerant ball valve”.
What does 150 WSP mean on a ball valve?
Working steam pressure
Working steam pressure (WSP) indicates the maximum steam pressure that a ball valve can withstand at the highest temperature rating. This might also be marked as SWP, meaning steam working pressure.
What is valve class rating?
Valves are also rated by the CWP rating. This rating represents the maximum allowable working pressure at the ambient temperature to which the valve may be subjected in normal service. Sometimes it is referred to as cold rating. The pressure rating of a valve at —20 to 100°F (—29 to 38°C), as listed in ASME B16.
How do I choose a ball valve?
In order to choose the right Ball Valve, identifying the pressure level is also imperative because it will help in selecting the specialized valve with the material involved. Ideally, Ball Valves are available in stainless steel, ceramic and even PVC for accentuating different types of liquid flow.
How do I choose a valve size?
So, how do you size a control valve anyway? When sizing a control valve, the rule of thumb is to size it so that it operates somewhere between 20-80% open at maximum required flow rate and whenever possible, not much less than 20% open at the minimum required flow rate.
What size valve do I need?
In most cases, adding 15mm to the height of the rim is a reasonable rule of thumb when it comes to deciding on a valve length. That extra 15mm is important because it provides enough length to fit any pump head.
What is a globe valve?
A globe valve regulates flow in a pipeline. It is used to control or stop the flow of liquid or gas through a pipe. Globe valves are named for their spherical body shape with the two halves of the body being separated by an internal baffle.
What is WSP rating?
The Steam Working Pressure (SWP) rating, sometimes known as Working Steam Pressure (WSP), indicates the maximum allowable pressure from hot, vaporized water.
What is a Class 300 valve?
Carbon Steel Gate Valves, 300# Flanged Rated for 740 psi, these cast-steel valves are suitable for gas, oil, steam, water, and general service applications.
What is a Class 600 valve?
Class 600 ball valves are for full range of oil, gass, water, petrochemical and general use/service and applications. Class 600 ball valves are provided with reasonable price. Class is the calculation result of the binding temperature and pressure of a certain metal according to ANSI B16. 34 standard.
How do I choose a valve type?
Selecting your Valve
- Choose a valve type depending on your application.
- Consider your fluid type (liquid or gas) and its characteristics to determine compatible valve materials.
- Determine the temperature, pressure, and flow rate under which your valve will be operating.