Plug valves are valves that fall under quarter-turn class whose operations are controlled by a plug encompassing structures ranging from cylindrical to conically tapered shapes used to control fluids flow in a pipe. The plug comes that way which may contain one or more cylindrical openings through it hence enable it to flow of fluids while they are open. On quarter turn of plug by 90º hence a flow will stop by plug. This feature makes a plug valve to be widely used in many industries.Get more news about plug valve,you can vist our website!

DESCRIPTION AND OPERATION PRINCIPLES

Generally, a plug valve consists of a valve body, plug, and stem. The plug fits in the valve body and can rotate inside it. The plug passage fills the pipe while open and becomes perpendicular to it to block flow when closed. For abrupt on and off control, quarter-turn action serves quicker purpose hence the use of plug valves.

Plug valves are often referred to as they are used to control flow in two directions as a backflow. Due to their straight-through flow, which means they can be used in a flow system that handles slurries and lubricant fluids, they have the ability to control minimum pressure.

Types of Plug Valves

There are several types of plug valves, each suited for different types of applications.

#1: Lubricated Plug Valves

These valves rely on lubrication medium to minimize friction between the plug and the body, leading to better sealing and ease of operation. They are designed for applications where pressures and temperatures are relatively high

#2: Non-Lubricated Plug Valves

The low friction type relies on a Teflon or polymer sleeve to reduce friction. These are widely used, especially in applications where cleanliness and hygiene are necessary, i.e. in food and pharmaceuticals.

#3: Eccentric Plug Valves

The eccentric design with the plug displaced reduces wears and gains sealing tightness, such valves are used for systems handling abrasive or highly corrosive media.

#4: Multi-Port Plug Valves

Multiple flows are accommodated in the multi-port plug valves, making it suitable for the complex piping networks where frequent fluctuations in the flow direction are expected.

It can be applied in a wide range of settings.

1. Oil and gas

Plug valves are widely used in the oil and gas industry, where isolation and flow direction control in high pressure pipelines may pose a challenge.

2. Chemical processing

Chemical processing plants show a preference for plug valves thanks to their high corrosion resistance and suitability for handling corrosive fluids.

3. Water and wastewater treatment

Drainage sludging pumps, such as trench cutter, slurry walls and digestion/fire fighting wastewater plants can be pumped using eccentric plug valves.

Introduction

The Non-Lubricated Plug Valve is highly preferred in the pharmaceutical and food industries for its clean operation and ease of sterilization (Borden 2014).

Advantages of Plug Valves

Plug Valves have various advantages.

Fast Operation: It has a short as well as easy to open (turn a quarter) and close throw.

Sleek Design: Their sizes are smaller compared to many other types of valves and are also lighter.

Not Much Servicing: Especially the non-lubricated versions need very little maintenance.

Flexibility: They service a wide range of liquids such as slurries, gases, and caustic and corrosive chemicals.

Limitations

Despite the many advantages, they have indeed some limitations. High Amount of Torque Is Required: much energy is needed to open and close this valve when speaking in relation to the larger sizes and high-pressure applicators.

They are subject to the constantly occurring and ever-growing wear of the plug and body in the environments which are slightly abrasive.

Poor Sealing: Lack of necessary attention and lubrication may cause leakage over time.

Summary

Plug valves are essential components of fluid control systems, as they offer simplicity, reliability and versatility. Their numerous types and versatility in application means they are appropriate for such elements as food mills and gas or oil systems. By looking into their buildup, operation, as well as their limitations, engineers and those in maintenance are better equipped for good valves selection.