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gate valve location

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gate valve location

gate valve location

archirodon

(Mechanical)

(OP)

14 Aug 07 23:22

hello everyone. we are in the process of adding new pipes for water distribution. being new in our company, i noticed that gate valves are being installed "only" where tees are located. May I ask then, what is the proper spacing of gate valves. How do we install them?

Replies continue below

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RE: gate valve location

pennpiper

(Mechanical)

15 Aug 07 06:56

I think we would be able to help you more if you gave us some important details about you installation and your question.
What size is your main header?
What size are your branch lines?
Are your valves flanged or screwed?
What do you mean by 'proper spacing of gate valves?'
What do you mean by 'How do we install them?'

RE: gate valve location

Cockroach

(Mechanical)

19 Aug 07 22:06

Typically gates are used in liquid application where batching is not an application.  These valves are not intended for throttling or fluid control, but are simply an "ON", "OFF" application.  In other words, the fluid flows or it doesn't.

On petroleum pipeline services, slab gates are used a few bore diameters downstream of a tee.  This is to let turbulence dampen out.  I often see them beyond the transition zone, in the laminar region.

Hope this simple answer addresses a simple question.

It depends on the particular fluid application. Are we talking Slab Gate?Typically gates are used in liquid application where batching is not an application. These valves are not intended for throttling or fluid control, but are simply an "ON", "OFF" application. In other words, the fluid flows or it doesn't.On petroleum pipeline services, slab gates are used a few bore diameters downstream of a tee. This is to let turbulence dampen out. I often see them beyond the transition zone, in the laminar region.Hope this simple answer addresses a simple question.

Kenneth J Hueston, PEng
Principal
Sturni-Hueston Engineering Inc
Edmonton, Alberta Canada

RE: gate valve location

BRIS

(Civil/Environmental)

20 Aug 07 02:02

I guess as you are installing water pipes the process media will be water (sorry cockroach - couldn't resist it) and gate valves will operate in an on off.

Normally in a distribution system valves are installed at tees as you describe. the spacing is determined from a balance of economics and down time for any maintenance.  But, as pennpiper notes you need to provide more details.

RE: gate valve location

BarryEng

(Civil/Environmental)

20 Aug 07 02:46

I usually locate valves in a reticulation system, to "protect the main source of supply".

If you have a DN 500 pipe with a DN 200 off the larger pipe, one of the main purposes of the valve, is to ensure the integrity (safety & reliability of supply) of the main pipe.  In other words, don't have a DN 500 pipe with a DN 200 tee, & a length of DN 200 pipe before a valve is installed (such as going under a road reserve).  This leaves the DN 500 vulnerable if there is a fault in the section under the road.

The extension of this, is, if you have a DN 1,500 pipe with a DN 150 scour, the valve should be as close to the main pipe as possible.  You do not want the main pipe supply to be shut down if a long length of DN 150 is damaged in any way.  A closely located (to the main pipe) valve will enable the damaged section of DN 150 to be isolated for repair without any impact on the supply from the main pipe.

Another 'empirical rule' that is often used, is that valves are located, such that no more than 5 valves in a reticulation system should be shut off in the event of a burst.  More than 5 valves results in a long period (mainly thru' trying to find the valves) before complete isolation of flow into the area of the burst (more consumer complaints about the time to "shut off" & the "waste of water").

RE: gate valve location

gerhardl

(Mechanical)

solid Product Page

20 Aug 07 04:32
Nothing to add to already several sensible answers than that you obviously (almost not necessary to mention) must have an on /off near or at local distribution points to cut off single houses, plants etc if the branch stretch to the valve near the main is of any distance.

Check also for necessity for air valves and pipeline bursting valves in addition to on/off.

Nothing to add to already several sensible answers than that you obviously (almost not necessary to mention) must have an on /off near or at local distribution points to cut off single houses, plants etc if the branch stretch to the valve near the main is of any distance.Check also for necessity for air valves and pipeline bursting valves in addition to on/off.

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News

Introduction:

How to install a gate valve? Gate valves are used to control the flow of liquids and gases in a piping system. They are one of the most commonly used valves in industrial settings due to their reliability and efficiency. In this guide, we will discuss the different types of gate valves,butterfly valves, their components, and how to install them for optimal performance.

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I. Understanding Gate Valves:

Explain the basic principles and components of a gate valve.

A gate valve is a type of linear motion valve that uses a sliding gate or wedge to control the flow of fluid through a pipe. It is designed with a gate or disc-shaped element that moves up and down, either fully opening or closing the valve. The main components of a gate valve include the body, bonnet, stem, wedge or disk, seat ring, and packing gland.

Describe the different types of gate valves available in the market.

There are three main types of gate valves: solid wedge, flexible wedge, and split wedge. Solid wedge gate valves have a single-piece gate that is designed to withstand high fluid pressures and temperatures. Flexible wedge gate valves have a two-piece gate with a hinge in the middle, allowing for better sealing in systems where there might be slight misalignment. Split wedge gate valves have two separate gates that move independently and are suitable for applications involving slurries or other abrasive fluids.

Discuss the advantages and applications of gate valves in different industries.

Gate valves exhibit a tight shut-off and straight-through flow, making them suitable for applications that demand complete shut-off or unobstructed flow. Industries such as oil and gas, water treatment plants, power generation facilities, and chemical processing plants commonly utilize gate valves. Gate valves can handle a wide range of pressures and temperatures, making them versatile for use in various industries.

II. Pre-Installation Preparation:

Emphasize the importance of thorough planning before installing a gate valve.

Before installing a gate valve, it is essential to have a well-thought-out plan to ensure proper installation and avoid any costly mistakes. This includes understanding the system&#;s flow requirements, selecting the right type of valve, and ensuring all necessary tools and materials are available.

Discuss the need for selecting the appropriate valve size, material, and end connections based on the application.

Selecting the correct valve size is crucial as it affects the flow rate, pressure drop, and overall performance of the system. Carefully choose the material of the valve based on the type of fluid and operating conditions to prevent corrosion and prolong the valve&#;s lifespan. End connections must be compatible with existing piping systems for a secure and leak-free installation.

Provide guidance on conducting a site survey to ensure compatibility with existing piping systems.

Conduct a site survey to determine the valve&#;s placement in the system and ensure compatibility with existing piping systems. Take factors such as pipe size, flange ratings, and space constraints into consideration during the survey.

III. Installation Procedure:

A. Step-by-Step Installation Process:

Safety precautions: Highlight the importance of personal protective equipment and safe working practices.

Before beginning the installation process, it is important to ensure that all safety precautions are taken. This includes wearing the appropriate personal protective equipment such as gloves and eye protection, as well as following safe working practices.

Valve positioning: Discuss the ideal location for installing a gate valve.

Install the valve in a location that allows for easy operation and maintenance. We recommend installing the valve in a vertical position with the stem pointing upwards to prevent debris from settling on top of the gate or disc.

Flange alignment: Explain the process of aligning the valve flanges with the pipeline flanges.

Proper alignment of the flanges is crucial to prevent leaks and ensure a secure connection. The valve should be aligned with the pipeline flanges, ensuring that they are parallel and have the same bolt circle diameter.

Gasket selection: Guide readers on choosing the right gasket material for a reliable seal.

The gasket material should be selected based on the type of fluid, temperature, and pressure in the system. Common gasket materials include rubber, PTFE, and graphite.

Bolting: Detail the proper bolt tightening sequence and torque values.

Tighten the bolts in a cross-pattern to ensure even distribution of pressure by gradually increasing torque values until reaching the specified amount. Over-tightening bolts can lead to gasket damage and leaks.

B. Troubleshooting and Tips:

Address common installation challenges and provide solutions.

Some common challenges during installation include incorrect valve size, improper alignment, and flange face damage. It is important to thoroughly check all components before installation and make any necessary adjustments.

Offer tips for ensuring smooth operation and maintenance.

To ensure optimal performance and longevity of the gate valve, regular maintenance is necessary. This includes proper lubrication of stem threads and packing gland, as well as periodic checks for leaks or corrosion.

IV. Post-Installation Considerations:

Stress the significance of regular inspection and maintenance.

 

Regular inspection and maintenance are crucial for the continuous operation of a gate valve. This includes checking for leaks, corrosion, and wear on moving parts. Any issues should be address promptly to prevent further damage.

Provide guidance on troubleshooting common issues that may arise after installation.

Some common issues that may arise after installation include leaks, valve failure, and difficulty in opening or closing the valve. Troubleshooting steps should be taken to identify and address the root cause of these problems.

Suggest resources for further information on gate valve maintenance.

For further information on gate valve maintenance and troubleshooting, manufacturers&#; websites and industry standards can be valuable resources. It is important to stay updated on any changes or updates in maintenance procedures to ensure proper care of the gate valve. Overall, proper installation and regular maintenance are essential for the efficient operation of a gate valve in various industries. By following these guidelines, users can ensure optimal performance and extend the lifespan of their gate valves. So, it is crucial to prioritize thorough planning, safe installation practices, and regular maintenance for smooth operation of gate valves in different applications.

Overall, proper installation and regular maintenance are essential for the efficient operation of a gate valve in various industries. By following these guidelines, users can ensure optimal performance and extend the lifespan of their gate valves. So, it is crucial to prioritize thorough planning, safe installation practices, and regular maintenance for smooth operation of gate valves in different applications.

Conclusion:

In conclusion, selecting the right gate valve size, material, and end connections is crucial for optimal performance in any application. Conducting a thorough site survey and following safe installation procedures can ensure compatibility with existing piping systems. Regular maintenance and troubleshooting are necessary to address common issues and maintain the longevity of gate valves. By prioritizing these considerations, users can maximize the efficiency and reliability of their gate valves. So, always follow the manufacturer&#;s instructions and recommended guidelines for safe and proper installation of gate valves. With proper care and maintenance, these valves can serve as reliable components in various industrial processes.

For more Flanged end gate valveinformation, please contact us. We will provide professional answers.