What does CWP stand for on a valve?
CWP stands for Cold Working Pressure and is an indication of the pressure rating for valves at a temperature up to 100°F. The number represents the pressure rating, ie a 600 with CWP under it would mean the valve is rated to 600 PSI CWP.
What does SWP mean on a ball valve?
It simply means that the valve is intended for use with water, oil or gas, with the exception of combustible gases. 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 cold working pressure CWP?
Cold Working Pressure (CWP) Rating. The maximum allowable working pressure of a valve in ambient conditions, usually from –20 to 100°F (–28 to 37°C). Pressure Rating. The maximum allowable working pressure of the valve at the temperature given in the table.
What does working steam pressure mean on a ball valve?
It simply means that the valve is intended for use with water, oil or gas, with the exception of combustible gases. Working steam pressure (WSP) indicates the maximum steam pressure that a ball valve can withstand at the highest temperature rating.
What is CWP on ball valve?
Cold working pressure (CWP) indicates the valve's maximum pressure rating at temperatures between -20°F to 100°F. This is commonly referenced alongside the valve's pressure rating. For example, 720 CWP indicates the valve is rated to 720 PSI within the CWP temperature range.
What does CWP stand for in plumbing?
CWP: Cold Working Pressure: This designates the maximum non-shock pressure a product can operate at. “Cold” is generally defined as a range between -20°F to 100°F. WOG: Water, Oil and Gas: This was an older, generic pressure rating call-out which has been largely replaced by CWP (see above).
What does 150 PSI WSP mean?
WOG and WSP are values of pressure for low and high temperatures, to say it in a simple way. A valve rated at 600WOG/150WSP should be able to withstand 600 psi in a water or gas pipe and 150 psi if used in a steam supply system.Jul 19, 2010
How do you read a valve tag?
The tag itself should identify the valve, usually by showing the valve number. The type of valve and the system the valve is part of typically are identified. For example, the valve tag might read "200# Main Steam Shut Off." This identifies the valve as the shutoff valve in the 200-pound main steam line.Oct 2, 2012
Can I use a gas ball valve for water?
Most gas valves are brass and heavier than standard valves. The same thing happens with ball valves. It's better to use a gas valve for water than it is to use a gas valve for gas.
What does SWP stand for on a valve?
The Steam Working Pressure (SWP) rating, sometimes known as Working Steam Pressure (WSP), indicates the maximum allowable pressure from hot, vaporized water.Dec 11, 2018
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 does PN stand for in valves?
Pressure NominalePN is an acronym for “Pressure Nominale”. The PN is used as a prefix to the pressure rating of the Flanges.Feb 18, 2020
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 is mm unit of measure, which corresponds to the size expressed in the inches, e.g.: DN20 is equivalent to ¾ inch NPT or BSP connection. The effective diameter indicates the actual port diameter in the ball.Jul 15, 2018
What is valve 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.Jun 29, 2017
How are valves numbered?
1. Valve Numbers. In most cases, trumpet valves are numbered, with “1” being the closest to the mouthpiece, and “3” being the closest to the bell. If the valves are not numbered, try and match up the openings on each valve with the pipes on the outside of each valve casing, as detailed in the image below.Aug 2, 2011
What are valve tags?
Valve tags help relay important pipe content information, valve identification or operation information at the point of need. Some stock valve tag options, like our brass valve tags and energy source tags, are available with preset legends.
What does 720 CWP mean?
It simply means that the valve is intended for use with water, oil or gas, with the exception of combustible gases.
What does a ball valve rating mean?
Ball valve ratings indicate the type of application where it is suitable for use. These ratings will be marked on the valve body.
Why do we use ball valve markings?
Markings are used for two reasons: To show the standards to which the ball valve has been tested. To show the applications where the ball valve can be used.
What does the casting number on a valve mean?
Some manufacturers may simply list the pressure rating in PSI as well. Casting Number: The casting number is used to track materials and batches. There may be more than one of these, depending on the valve. Lead Free: Some valves will be marked with an “LF” to indicate they are lead free.
What is the ANSI mark on a valve?
American National Standards Institute (ANSI): ANSI sets various standards for the manufacturing, installation and use of ball valves. You will most often see this mark on flanged ball valves.
What does DN mean in valve size?
Valve Size: The valve pipe size is often simply noted in inches, however, you may also find the pipe size noted with a DN prefix. This stands for “diameter nominal” and the number following the prefix is the valve pipe size in millimeters.
Where should the manufacturer's name be on a valve?
Manufacturer Information: The manufacturer’s name should be on the valve body.
What does a 600 CWP mean?
The number represents the pressure rating, ie a 600 with CWP under it would mean the valve is rated to 600 PSI CWP.
What does WSP mean in valves?
WSP. WSP stands for Working Steam Pressure and defines the pressure of steam in a system that a ball valve can be used in. The industry uses WSP for bronze ball valves because, as the temperature rises, the strength of the material decreases.
Do brass valves have markings?
You may have noticed that brass and stainless steel ball valves have markings on them. These markings aren’t random , they help show what standards ball valves have been tested to and what applications they can be used in. In this blog we will go over the different markings that you may come across when looking at metal ball valves.
Can valves be used in combustible gas?
Not all valves are approved to be used in combustible gas applications. Ones that are, will have specific markings depending identifying where they can be used.
What does WOG stand for in valves?
WOG stands for the water, oil, and gas rating for the valve and reflects the maximum pressure capability of the valve at 100 F. WSP stands for working steam pressure and reflects the maximum pressure rating for the valve at the highest temperature rating.
What is valve trim?
The operating parts of a valve which are normally exposed to the process fluid are referred to as ' valve trim'. Usually parts like stem, plug, disc, seating surface etc. are called as valve trim. Valve trim is the physical shape of the plug and seat arrangement.
What is the purpose of fire safe valves?
The purpose of a fire-safe valve is to prevent or hinder flammabel fluid (liquid or gas or gases formed from liqid phase)to pass, at least for a given time and at least during that periode not in critical amounts, a closed valve during overheating of the pipeline , caused by fire or similar events.
