Month: May 2019

Flanged Valves – Types and Applications

Flanged valves allow assembling the system components without cutting or welding pipe. A flange is a rigid joint that can withstand the pressure and pipe loads related to the system and is a structural element of the piping system.The biggest advantage of using a flanged valve is the valve can be removed easily from the pipe. Another benefit is it ensures a tight joint under given operating conditions which helps in avoiding leakage problems.

Flanged valves allow assembling the system components without cutting or welding pipe. A flange is a rigid joint that can withstand the pressure and pipe loads related to the system and is a structural element of the piping system.

Several dominant standards such as British Standard adopted from the European Standard is followed while deciding the size and joints of the flange. Factors like the type of service, material requirement, maximum pressure capacity, and temperature affect the rating of flanged valves.

The biggest advantage of using a flanged valve is the valve can be removed easily from the pipe. Another benefit is it ensures a tight joint under given operating conditions which helps in avoiding leakage problems.

They are made with different types of materials such as cast irons, bronzes, castable alloys, and forged steels. Flanged valves can be used in various industries including food and beverage, chemical, pharmaceutical, oil and gas, and in waste-water management services.

Different Types of Flanged Valves

The major type of flanged valves are ball valves, check valves, butterfly valves, globe valves, and relief valves.

1. Check  Valves : It is used to prevent back flow in a piping system and they can sustain heavy pressure. Check valves can be used in refining and chemical industries, waste-water management systems, and in oilfield production.

2. Ball Valves: It is used to control the flow of substances and possess poor throttling characteristics. Ball valves can be used in oil and natural gas industry. They are also used in chemical storage and many manufacturing sectors.

3. Butterfly valves: They have limited control capability and are used to regulate flow. They require very less maintenance and are very accurate. They can be used in pharmaceutical, chemical, and food processing services.

4. Globe valves: They use linear motion to throttle flow.Globe valves don’t leak as much as other valves. Globe valves can also be used as stop-check valves as the opening-closing time is shorter. They can be used for high-temperature applications.

5. Relief valves: They are used to protect the system during an overpressure event. Relief valves are used in high-rise buildings, high-water pressure inthe urban water supply network, and mines.

6. Control Valves: A control valve allows specific pressure to pass through the system. They can be used in construction, oil and gas industry, nuclear power industry, pharmaceutical, and refining industry.

Conclusion

Flanged valves serve different purposes and are widely used in various industries. Faulty assembly of the valve can cause dangerous leaks so it is advised to clean the connection thoroughly before installing a valve.

SKG Pneumatics Inc. has all types of valve equipment that serve various purposes. All of our products are highly durable and provides the complete value of money.

What is the difference between Hydrant Valve & Landing valve?

Landing valves are something that is used for fighting fires and is provided on risers in buildings. These are usually located in staircase landings, allowing easy access to firefighters. A fire hydrant system is comprised of water supply pipework and valves, which can be connected to the hose of fire brigades for firefighting purposes. Hose reel drum and hose pipe are also effective in fighting fires inside a building. Both the hydrant valve and landing valve have similar designs, irrespective of the place installed. Flow Control Valve is a device that is used to control the flow of water by varying the size of the flow directed by a signal from a controller. 

Difference between Hydrant Valves & Landing Valves:

Landing Valve

Landing valves are permanently charged with water using a pressurized supply. In simple words, they are globe valves, installed on hydrants. Also, a hose and a branch are connected to a coupling on it. Landing valves are installed in all the floors of a building where installation of hydrant valve is not possible and is then used by fire fighting department to extinguish the fire. The normal pressure of a landing valve is around 65 psi. In order to keep the nominal working pressure at the inlet of the hose reel, a pressure reducing valve is used in hose reel system.  

Hydrant Valves

Fire Hydrant Valves are efficient in fighting large fires. They allow firefighters to extinguish the fire from a distance. Pumping facility is the most important part of the fire hydrant system. The main use of the pump is to pull the water from the reservoir and supply the same pressure to the hydrant points enabling firefighters to extinguish the fire effectively. In order to connect and operate fire fighting equipment from a hydrant valve, the pressure rating must be 100 psi (7 kg/cm2). But, it varies depending on the size of the building. The pressure of hydrant valves in large industrial complexes might range around 10-11 kg/cm2 while in small buildings it might range around 4-5 kg/cm2.  

Fire sprinklers and flexible hoses can be effective in fighting small fires. Fire sprinklers discharge water when the effect of fire or extensive heat is detected and is effective in the early stage of fire. Flexible hoses act as a connection between the pump to the system. The standard length of a flexible hose is around 100 ft.  

If you’re looking for fire fighting instruments, SKG PNEUMATICS INC might be the best choice, with more than 14 years of experience they deliver quality instruments of highest standards.

Applications of Valves in Water Industry

In industrial engineering, manufacturing and scientific communities, there is a vast use of valves. The main objective of the valve is to control the flow and pressure of water and to release air from the water system. Valves play a very ample role in the water industry.  Water valves are used in many parts of daily mechanical devices such as HVAC and water system in an office.

 

Most Common Valves Found in the Water Industry and their Characteristics

 

1. Gate Valves

Gate valves are the most common valves found in the distribution system. Gate valves are mostly used for the on/ off control. Gate valves prevent the flow of the liquid in both directions. They are very easy to install and to maintain. Gate valves are cost efficient and they are mostly used in petroleum industries because of their abilities to cut through liquids.

2. Butterfly valve

Butterfly valve also known as quarter turn valve because it provides 90-degree rotary motion for stoppage. They often came in large sizes but short in length and are of very light weight. They posses very low torque requirements.

3. Ball Valves 

Ball valves are considered as ideal for pump check services. In ball valves a ball rotates between two circular seats which are made up of a kind of PTFE and co- polymer. They exist in a small size range between 1/2” to 12”. These valves are used in higher pressure applications. Ball valves can be operated with less torque than gate valves and has small dimension and are lighter in comparison of gate valves.

4. Plug Valves

Plug valves are used to control the flow by rotating the conically tapered plugs inside the valve body. They came in a very simple design with few parts and their maintenance and repair is very easy to do. They contain very low head cost and comes drip tight closing.

5. Regulating Valves

 Regulating valves are designed to enable the direct control of flow rate and the considerable control of process quantities i.e. reduces the flow/ pressure. A high head loss can be tolerated by regulating valve and they came with multiple control scenarios. These valves are installed on trunk or industrial pipelines and it consists of a regulating unit which varies the flow cross-section.

6. Air/Vacuum Release Valves

 As it is clear from the name that these types of valves releases air during the filling and testing of pipe and it also releases air that naturally accrues in pipes. During draining it allows air into the pipe and it also assures the pipeline carrying capacity.

SKG Pneumatics Inc is one of the best suppliers of all kinds of industrial valves such as Gate Valves, Globe Valves, Ball Valves, Check Valves, and Non-return Valves, Pressure Reducing Valves, Shutoff Valves. If you want to buy any kind of valves or want to know more about our organization, then we are always at your service with our heart and soul.