The valve's body is the outer casing of most or all of the valve that contains the internal parts or trim. The bonnet is the part of the encasing through which the stem (see below) passes and that forms a guide and seal for the stem. The bonnet typically screws into or is bolted to the valve body..
Also, what is the trim of a valve?
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.
Also, what are the types of valves? Classification of Valves Based on The Way it Open and Closed
| Valve type | Linear motion | Rotary motion |
| In-line check valve | X |
| Stop check valve | X | X |
| Ball valve | X |
| Pinch valve | X |
In this regard, what is a bolted bonnet valve?
BOLTED BONNET. Gate valves serve as efficient on-off valves with flow in either direction. In such a design, a wedge slides cross a general passageway in order to control fluid flow (like a sliding gate - hence, the name). This is made possible by the wedge lifting entirely out of the passageway.
What is a valve spindle?
noun The stem or axis on which a valve is fastened and which transmits motion from outside of the steam or valve-chest to the valve proper within it.
Related Question Answers
What are the wetted parts of a valve?
Wetted Parts of pressure sensors – definition and overview. The term “wetted parts” is used in connection with pressure sensors for all those parts, surfaces and/or components that are (potentially) exposed to or in direct contact with the medium under pressure.What is Stelliting process?
Stellite is a family of completely non-magnetic and corrosion-resistant cobalt alloys of various compositions that have been optimised for different uses.What is the use of valve?
A valve is a device that regulates, directs or controls the flow of a fluid (gases, liquids, fluidized solids, or slurries) by opening, closing, or partially obstructing various passageways. Valves are technically fittings, but are usually discussed as a separate category.What are the types of control valves?
List of common types of control valve - Sliding Stem. Globe valve. Angle body valve. Angle seat piston valve.
- Rotary. Butterfly valve. Ball valve.
- Other. Pinch valve. Diaphragm valve.
What are the characteristics of control valve?
Inherent Control Valve Flow Characteristics These curves are based on constant pressure drop across the valve and are called inherent flow characteristics. Linear - flow capacity increases linearly with valve travel. Equal percentage - flow capacity increases exponentially with valve trim travel.What is cr13 valve trim?
The removable and replaceable valve internal parts that come in contact with the flow medium are collectively termed as Valve trim. A Valve's trim performance is determined by the disk and seat interface and the relation of the disk position to the seat.What is CV value?
The valve coefficient, Cv, is a number which represents the capability of a valve (or any flow component) to flow a fluid. By definition, a Cv value of one is the Cv required to flow one gallon per minute (gpm) of water at 60' F with a pressure differential of one psi. Flow is proportional to the value of Cv.What is pressure seal bonnet?
A pressure seal is a valve design concept that offers distinct advantages when compared to a conventional bolted body-to-bonnet sealing mechanism. It uses the valve system pressure to provide sufficient forces against the valve body's internal diameter (ID) and the bonnet surfaces.What are globe valves used for?
The globe valve is used for throttling flow control. Shut off is accomplished by moving the disc against the flow stream rather than across it as in the case with a gate valve. The flow pattern through a globe valve involves changes in direction, resulting in greater resistance to flow, causing high pressure drop.What is a seal valve?
What is a Car Seal Valve? Car seals are a simple device used to lock or 'seal' a valve in the open or closed position to prevent unauthorized operation of the valve.What is a pressure seal?
A pressure seal is a valve design concept that offers distinct advantages when compared to a conventional bolted body-to-bonnet sealing mechanism. It uses the valve system pressure to provide sufficient forces against the valve body's internal diameter (ID) and the bonnet surfaces.What is the symbol for a valve?
The generic symbol for a 2-way valve is two triangles pointing to each other with the tips of the inner points touching. The pipe lines are represented by lines connecting to each side of the valve symbol. Various types of lines are used to represent different pipes, tubes, and hoses. 
