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Can you replace a gate valve with a ball valve?
If you already have a gate valve installed and have to replace it, you can certainly replace it with a ball valve. You will need a torch to heat up the parts and remove them. Turn the water off and drain it from the pipe and valve. You will want to open the valve as well.
What is the difference between a gate valve and a knife gate valve?
The biggest difference between these two types of valves is that gate valves are built to ANSI standards while knife gate valves adhere to TAPPI standards. Therefore, dimensionally the gate valve is wider, flanged, and ANSI pressure rated. It also has API leak tightness standards must be met.
How do you make a ball valve turn easier?
Spray penetrating lubricant around the ball valve handle, at the point where the colored handle meets the pipe portion of the ball valve. Turn the knob back and forth several times so the lubricant can work its way through this tight crack and down around the ball.
Stem Extensions for Plastic Gate Valves
What is a double expanding gate valve?
Through Conduit Double expanding Gate Valves are double block and bleed valves as they can grant zero leak towards the body cavity with pressure on the upstream and downstream side, even when the valve is fully open.
Stem Extensions for Plastic Gate Valves
Through Conduit Double Expanding Gate Valves are double block and bleed valves because they cannot ensure leakage towards the body cavity under pressure on the upstream and downstream sides, even with the valve fully open. Solid particles cannot enter the body whether the valve is in the open or closed position. In addition, they offer superior bubble-tight sealing properties and unmatched robustness in harsh, high-pressure, high-temperature service environments. The full bore design minimizes flow turbulence and when the valve is open the pressure drop is equivalent to that produced by a pipe of the same diameter and length. In addition, the valve is perfectly suited for pigging operations.
ATV supplies the double expanding through line gate valves in a wide range of materials and configurations to meet any specific needs of the application and customer requirements. Optional features are available for seat and stem seals, hardfacing and end connections. Materials are sourced from qualified suppliers based on specifications that reflect industry standards (API, ASTM, NORSOK, BS, DIN or others) but also include additional requirements derived from years of experience.
Through Conduit Slab Gate Valves are suitable for manual operation or for power assisted operation. ATV takes full responsibility in selecting the most appropriate size for operating conditions. However, ATV also welcomes customer contributions: in such a case, ATV’s responsibility is limited to mounting the actuator on the valve and testing the valve and drive system. If desired, ATV will work with the customer to select the actuator.
ATV designs, manufactures and tests its products in accordance with all relevant industry standards and codes (ANSI, API, ASME, BS, ISO, NACE, PED and others). ATV double expansion spools with through-line can be manufactured to meet product specification level PSL 3/3G.
ATV emphasizes its willingness to manufacture engineered valves; Therefore, requests for special size, class and design requirements are welcomed.
What are different types of gate valves?
Gate valves can be divided into two main types: Parallel and wedge-shaped. The parallel gate valves use a flat gate between two parallel seats, and a popular type is the knife gate valve designed with a sharp edge on the bottom of the gate.
Stem Extensions for Plastic Gate Valves
Where are gate valves used?
Gate valves are often used when minimal pressure loss and a clear bore are required. When fully open, a typical gate valve has no obstruction in the flow path, resulting in very little pressure drop, and this design allows for the use of a pipe cleaning pig. A gate valve is a multi-turn valve, which means that the valve is actuated by means of a threaded spindle. Because the valve must rotate multiple times to go from the open to the closed position, the slow operation also prevents water hammer effects.
Gate valves can be used for a variety of fluids. AVK gate valves are suitable for the following working conditions:
Drinking water, waste water and neutral liquids: Temperature between -20 and +70 °C, maximum 5 m/s flow rate and up to 16 bar differential pressure.
Gas: Temperature between -20 and +60 °C, maximum 20 m/s flow rate and up to 16 bar differential pressure.
See AVK installation and maintenance instructions for water/wastewater and gas.
AVK also offers control valves. Read more about the benefits.
Do gate valves wear out?
Gate valves tend to wear out over time. And corrosion can cause the disc to stick in either the open or closed position. When the handle is forced, the stem leading from the handle to the disc will often break, rendering the valve useless.
Stem Extensions for Plastic Gate Valves
How long does a gate valve last?
You can expect a shut-off valve to last about 10 to 25 years, with an average of 20 years. But, if they are not “exercised” every year or two, there is good chance a valve will be freeze prematurely in the open position just when you really need it to close for a plumbing emergency or repair.
Stem Extensions for Plastic Gate Valves
You can expect a shut off valve to last around 10 to 25 years with an average of 20 years. But unless they are “trained” every year or two, there’s a good chance a valve will freeze in the open position prematurely, just when you really need to close it for an emergency or repair.
“The problem most people have with shut-off valves is that they freeze from not using them regularly,” according to our plumber friend James Freeman of J.W. Freeman Plumbing in Gainesville, Florida. “They can even get so stiff that they leak behind the handle, snap off the stem, or even break off a pipe in the wall when you actually try to use them.” The valves come in handy when they work, but often we have to turn off the water to the house and replace the shut-off valve while also doing a fixture repair because they haven’t been used often enough.
It’s also a good idea to swap out all of your older shut-off valves if you find a pair that have frozen and we recommend quarter turn valves as replacements. See our blog post Which plumbing fixtures require water shut-off valves in a home? For more information.
Home inspectors do not test shut-off valves because of the potential for them to leak when operated. In addition, the practice standards of both national home inspection associations and the state of Florida specifically exclude valve testing as a requirement for a home inspection.
Here is a bar graph comparing shut off valve life expectancy to other household faucets.
Go to our blog post What is the Average Lifespan of Parts in a House? to evaluate other house components. To understand the basis, potential uses, and limitations of lifespan ratings, read our blog post How accurate are the average lifespan ratings of household components? Are they really useful?
• • • • • • • • • • • • • • • • • • • • • • • • • • • •
Here are links to a collection of our other blog posts about PLUMBING:
• How can I protect my pipes from bursting during a harsh North Florida winter freeze?
• Can galvanized steel pipe still be used for new plumbing in a home?
• How can I tell if I have cast iron pipes in my house?
• Why can’t a sanitary tee be used to connect horizontal to horizontal drain pipes?
• What is the difference between green and white sewer pipes?
• Does a washing machine drain hose have to be attached to the standpipe?
• What are the abandoned pipes sticking out of the wall in my house?
• What are the legal requirements for pipe terminations?
• What are the legal requirements for locating drain pipes under sinks?
• What makes a gurgling sound when water drains from a bathtub or sink?
• What is a “combination drain and vent” in a plumbing system?
• What is a building trap?
• What is a galvanized nipple?
• What pipes are sticking out near my water valves?
• How exactly do you find a broken water pipe leak under the floor panel?
• What is the difference between a water pipe and a sewage pipe?
• Are plastic pipes (PVC, CPVC and PEX) safe for drinking water?
• Must a hot water faucet handle be on the left?
• What is a dielectric connection?
• What is that powdery crust on the pipe connections on the water heater?
• If all the drains have water and you can still smell sewage gas, what is causing the problem?
• How can I tell what type of plumbing pipe I have?
• Why is there a flexible accordion pipe under the sink?
• What is the difference between PVC and ABS plumbing tubing?
• What is the difference between water supply pipe and water supply pipe?
• What are the pipes on my roof?
• How do I find out which water pipe runs underground from the water meter to the house (house connection pipe)?
• What is a P-trap?
• Why are old galvanized steel water pipes a problem for homebuyers?
• What does a polybutylene pipe look like? Why is this a problem?
• Which plumbing lines are an insurance issue and may be uninsurable?
• Can you connect CPVC pipe directly to a gas water heater?
Visit our PLUMBING and LIFESPAN pages for other related blog posts on the subject or go to the INDEX for a full list of all our articles.
NOTE: These life expectancies are based on data from InterNACHI, NAHB, FannieMae and our own professional experience. Due to the many variables that can affect a lifetime, they should only be used as rough guidelines and should not be relied upon as a warranty or guarantee of future performance.
How do you stop a gate valve from leaking?
Gate valve mostly leak from the gate valve gland. This is due to a build up of deposits against the seal and the seal getting a bit displacement. To stop the leak on the gate valve gland, all that need to be done is just to tighten up the gland nut as shown in the picture (1).
Stem Extensions for Plastic Gate Valves
Hello, and welcome to the information on gate valve problems and how to cure them. This article is about problems with leaking gate valves and gate valves not working properly, from Martin Smith, an emergency plumber in Manchester but also a representative covering the whole of the UK with over 400 recommended national engineers. Here are the 14 most common questions asked when looking for answers to your gate valve problems.
What is a gate valve used for?
? My gate valve is stuck, what can I do?
? Gate valve not opening?
? How do I replace my gate valve without draining the hot water?
? My gate valve does not switch off properly, why is that?
? When replacing the gate valve, do I have to drain it first?
? Where should gate valves be placed?
? Why do gate valves stick?
? How do I repair my gate valve without replacing it?
? Why do plumbers install gate valves when they are so unreliable?
? What causes gate valves to break?
? Is it okay to leave a gate valve partially open or partially closed?
? How long do gate valves last?
? Where do gate valves leak from?
What is a gate valve for?
A domestic gate valve is used to shut off the gravity fed water supply. A repair is taking place to temporarily turn off the water.
My gate valve is seized, what can I do
If your gate valve is seized and you can’t close it, the only option is to drain it. In some cases, a plumber can quickly replace the valve, but there is no risk involved. In most cases when you have gate valve problems, it is better to drain the water if your gate valve is seized.
Gate valve not opening problem
If you have a gate valve that won’t open, it’s usually because the end of the stem breaks, as shown in figure (3). The reason this usually breaks is because if the valve doesn’t shut off due to a buildup of dirt, scale or other, the plumber or resident tends to overtighten it, causing the threads to break. As an experienced emergency plumber from Manchester, Martin Smith explains that if the valve doesn’t close easily, if you drain and replace the gate valve at the same time, it’s better if you drain and replace the gate valve at the same time, eliminating further gate valve problems and incurring more costs.
How do I replace my gate valve without draining the hot water?
The best way to replace the valve without draining is to freeze the plumbing and then replace the valve. The only other option is to close the gate valve and disconnect the lower tube. Once you have the top nut with the supply pipe left over you may be able to replace the valve very quickly, this will need to be done by a qualified emergency plumber.
My gate valve does not switch off properly, why is that?
The reason why the valve does not close properly, as shown by the closing mechanism in figure (4), is that as the gate valve ages, dirt or debris accumulates which stops the closing mechanism from closing properly. The best way to solve this is to either clean the valve completely or replace the gate valve.
If I replace the gate valve, I should have to drain first
As discussed in one of the paragraphs above, you don’t always need to drain to replace valves as long as you have the experience and tools to do so, which can include the electric pipe-icing machine.
Where should gate valves be placed
Gate valves are typically found both upstream and downstream of most electric valves and also equipment such as the hot water cylinder and surge tank.
Why do gate valves stick
The gate valve is sticking because the water that circulates around the central heating system via the pump eventually builds up iron and limescale as well as other deposits that circulate, this includes hot and cold water systems. All deposits tend to stick to rough spots rather than smooth spots, which tend to be valves. The debris gets into the mechanisms, causing the moving parts to bind instead of moving smoothly.
How do I repair my gate valve without replacing it?
If you are repairing the gate valves and not replacing them, as long as the valve stem is not damaged, all you need to do is remove the gate from the gate valve body and clean it completely to ensure no debris remains. Once the gate valve is completely clean, you need to point the gate valve up so there is no friction between the brass wear.
Why do plumbers install gate valves when they are so unreliable
Plumbers install brass gate valves because there are currently no other better fittings and it’s more of a bad habit than an educated purchase. Martin believes that the market is still wide open for improvement when it comes to gate valves and their operational use.
Which causes gate valves to break
The cause of gate valve breaking is that there is too much pressure when shutting off the gate valve because the valve is too fragile (3) as shown in the figure. The stem threads don’t go deep enough into the valve and so with too much pressure there isn’t much to stop resistance. It’s a bit like snapping a delicate twig instead of snapping a stick.
Is it okay to leave a gate valve partially open or partially closed?
Leaving the gate valves partially open or partially closed has some disadvantages as listed below.
A wave effect sent through the water, causing a sound or vibration. flow restriction. Greater chance of trapping dirt. Wear on gate valve greater than usual.
How long do gate valves last
The average valve would last around 25 years but if the central heating system is well maintained and the hot or cold water has little water deposits in the sense of scale then there is a good chance the valve will last longer. It’s always a good idea to make sure the valves are lubricated by taking them apart and lubricating them to save on future costs, but for some it feels like you might as well replace them if they’re easily accessible.
Where is the gate valve leaking from?
Gate valves most often leak at the gate valve gland. This is due to debris accumulating on the seal and the seal being displaced somewhat. To stop the leak at the gate valve gland, all that is required is to tighten the gland nut as shown in figure (1). The second most likely area for the gate valve to leak is the main valve body connection (2) which can be fixed either by unscrewing and installing PTFE on the threads and retightening or installing a new fiber washer on the seating area. The third place where a leak can occur is in the nut and olive area.
Information on problems with gate valves
If you are looking for an emergency plumber in Manchester or anywhere else in the UK call Martin Smith the agent who can recommend an engineer or get you a plumber within 30 to 90 minutes or if you wish to be a plumber are on our emergency list from plumbers, please email us at [email protected]. We currently have over 420 registered engineers on a 24 hour emergency call system to recommend to you in your hour of need.
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When would you use a knife gate valve?
Knife gate valves should only be used for applications requiring a completely open or completely closed position and should not be used to regulate flow unless they are designed for it. Whenever fluid is forced against a partially closed gate, there will be a vibration, gradually eroding the disc and seat.
Stem Extensions for Plastic Gate Valves
Knife gate valves are designed for use in some of the harshest environments and typically have a sharpened blade for cutting through heavy liquids.
They are particularly useful in wastewater applications where corrosion is an important issue. In addition to the valve design, which is optimized for muddy media, a knife made of acid-resistant stainless steel is therefore an advantage, since it is less susceptible to corrosion damage and therefore has to be serviced or even replaced less often.
Knife gate valves should only be used for applications requiring a fully open or fully closed position and should not be used for flow control unless designed to do so. Whenever fluid is forced against a partially closed gate, a vibration is created that gradually erodes the disc and seat. In addition, the knife gate valves are designed to open and close slowly to protect them from the effects of water hammer.
What is the difference between knife gate valves and gate valves?
Both wedge and knife gate valves are primarily designed for on-off applications where the valve is fully open or fully closed. It is not recommended to use either to regulate flow because if fluid presses against a partially closed gate, vibration will occur and cavitation will eventually damage the seat and body. Also, both types of valves are designed to open and close slowly to reduce the risk of water hammer.
Both types can be used in applications that include:
What is a water shut off valve?
A water shut-off is a primary control that turns off the water supply to your bathroom and kitchen plumbing. For example, it prevents flooding when you are planning to repair a fixture such as a faucet or toilet or when you are faced with a plumbing emergency, like a leak from a water heater or supply line.
Stem Extensions for Plastic Gate Valves
What is my main water shutoff valve doing?
A water shutoff is a primary control that shuts off the water supply to your bathroom and kitchen plumbing. For example, it prevents flooding when you are planning to fix a facility like a faucet or toilet, or when you are faced with a plumbing emergency such as a fire. B. a leak in a water heater or a supply line. Ideally, you should also turn off the water when leaving the house for long periods of time.
When a plumber comes to your home for a service call, their first questions are likely to be, “What’s the problem and where is the water shut off?”
How to find my water shut-off valve
Locate your main water shut-off in one of the following locations:
On the front wall of your basement or crawl space
The blanket
Behind an access panel
Near your water heater
Behind the access panel
In townhouses it is located at the front of the property in the basement/bottom floor or at basement ceiling level in the center of the unit
In addition, your home has individual water shut-off valves for your fixtures and water-using appliances, including sinks, toilets, water heaters, washing machines, and water heaters.
How do I turn off the water shut-off valve?
Close an indoor water valve by turning it clockwise. An outside shut-off valve may require special tools (such as a meter wrench or wrench) to open the cover and close the valve itself. If you are not sure which tools you need, ask us – we will be happy to advise you.
Be prepared to act quickly in an emergency. Make sure you (and the rest of your household) know exactly where your main faucet is and how to turn it off. This way, you can minimize water damage from severe leaks or even flooding, saving yourself thousands of dollars and major headaches.
Common water shutoff problems
Both master and individual isolation valves sometimes develop problems. The following can happen and how to solve the problem:
Shut-off valve leaking
Often you will find that a single water stopcock will drip out of the valve stem when turned on after being closed for a long time. It is not uncommon for your shut-off valve to leak, even with newer valves.
Try to repair it yourself – gently tighten the packing nut with a wrench, turning it only 1/8 to 1/4 of a turn; Then open and close the valve several times. If tightening the packing nut does not stop the leak, shut off your home’s water main, remove the packing nut, and install a new valve. Then reinstall the packing nut and restore the water supply.
And if installing a new shut-off valve still doesn’t solve your leak problem, it’s time to call in a leak expert, aka a licensed plumber.
Stuck water shut-off valve
If your faucet has not been used for a long time, the handle may get stuck. Of course you want it to be easy to use in an emergency, so turn your lockdown handle back and forth regularly, at least twice a year. Lubrication with WD-40 or heating the valve with a hair dryer can also help.
bursting pipes
It is generally advisable to turn off the water if you are away from home during the winter. However, you should turn off your water heater and drain your plumbing pipes by leaving all your faucets running. If water remains in the pipes, they can freeze and burst. Therefore, before opening the shut-off valve again, check for leaks or other damage. If you have questions about the condition of your pipes, a professional plumbing inspection will help you.
Old plumbing fixtures
Old plumbing fixtures could be fitted with T-shaped “saddle valves”. However, these devices are more prone to leaks and clogs, so we recommend protecting your home by replacing them with standard water shut-off valves.
Keep your home safe
Keep your water shut-off valve in good working order to protect your Ottawa home from water damage. Contact an experienced plumber from Out of This World Plumbing. We check your plumbing system and replace damaged components.
I NEED A SHUTOFF VALVE TEST IN OTTAWA
Roadtrek Simplicity Black Valve Handle extension
See some more details on the topic gate valve handle extension here:
Stem Extensions for Plastic Gate Valves – Asahi/America
Stem extensions are valve handle extensions, designed for use on valves located areas where standard configuration valve handles are inaccessible. They prove …
Source: www.asahi-america.com
Date Published: 4/8/2021
View: 885
Gate Valve Handle Extension – Alibaba
Shop for wholesale valves and find quality gate valve handle extension on sale at affordable prices! Choose amongst an abundance of options to find the …
Source: www.alibaba.com
Date Published: 10/14/2021
View: 2332
Gate Valve & Butterfly Valve Accessories
Each Extension Stem has a centering ring to keep it aligned in the valve box. It has a 2″ heavy square socket on one end and a 2″ heavy square nut on the other.
Source: www.ejprescott.com
Date Published: 2/8/2021
View: 6312
KNIFE GATE VALVE – STEM EXTENSION Materials Available:
Elite Valve specialises in designing stem extension for the knife gate valve as per customer specifications. The barestem valve is connected to the extension …
Source: www.elitevalve.com
Date Published: 3/26/2022
View: 9551
Gate Valve Accessories – USABlueBook.com
Gate Valve Extension Stem 4′ with 1/2-13 Set Screw Option. Price: $105.95. Brand: _Unspecified. Catalog: Page N/A. Quantity – +. Add to Cart Add to Wishlist.
Source: usabluebook.com
Date Published: 7/9/2022
View: 7721
Valve Extension Stems (Round)
The upper nut (or hand wheel) and lower coupler are pinned to the extension rod (or tube) which is drilled to accept stainless steel spool pins. Upper nuts and lower couplers are available in either ductile iron, grade 65-45-12, or type 316 stainless steel. The pin connections allow the castings to be removed, allowing the bar to slide through Trumbull bottom boxes and stock guides. Extensions can easily be shortened by cutting the shank and redrilling for the pin.
Extension spindles normally come complete with upper nut (or hand wheel), rod, lower coupler, two cap screws with lock nuts and pins. Upper nuts and lower couplers are also sold separately. Adapters can be custom manufactured to provide extension stems on OS and Y valves (click here for a PDF illustration of the OS and Y adapter). Universal joints, thrust collars and bevel gears are also available.
Also see our pages on Floor Stands, Floor Boxes, Shaft Guides, Mud Valves and Valve Position Indicators.
Gate Valves and Knife Gate Valves: Isn’t One Just Sharper?
As one of the resident bloggers here at Crane, I get blog post ideas all the time. The other day I came up with the idea for a post about the difference between a gate valve and a knife gate valve. “Serious?” I said. “Isn’t the only difference that the blade lock has a sharper disc?”
I should have known the difference wasn’t so sharp and dry, pardon the pun. While the gate valve and knife gate valve share many similarities, there are characteristics in these valves that make them inherently different.
What makes them similar?
Gate valves and knife gate valves are primarily intended for on/off service. The use of this type of valve to control flow is not recommended because vibration will occur as fluid presses against a partially closed gate, eventually wearing and eroding the seat and disc. Because of this, these types of valves should be either fully open or fully closed.
These valves are also designed to open and close slowly to protect them from the effects of water hammer.
Both types of valves can be found in applications that include:
muds
Heavy Oils
Non-flammable viscous liquids
sewage
Clean water
What makes them different?
The differences between them are enormous. First of all, yes, the knife gate valve has a sharpened disc (thank you very much). This is to cut through any solid solids that could be preventing the valve from closing and causing a leak. But there’s more that makes their designs very different.
The main difference between these two types of valves is that gate valves are built to ANSI standards while knife gate valves are built to TAPPI standards. Therefore, the gate valve is wider, flanged and rated for ANSI pressure. API tightness standards must also be met. They are bi-directional and are commonly used in steam applications as well as liquid applications. The gate valve is only available with metal seats.
Another major difference between an ANSI gate valve and a knife gate valve is in the area of the gland packing. A gate valve has a V-ring packing set that seals the shaft attached to the gate valve, while a knife gate valve has a gland packing that seals around the gate.
A knife breech has a very thin profile compared to its bulkier counterpart. It’s also uni-directional (although bi-directional is an option on some) and comes either as a wafer or with a serrated flangeless body. The seats on the knife gate valve are available in all types, from metal to elastic types.
Two of the knife’s biggest advantages are its weight and cost. A 16 inch knife gate valve typically weighs less than 300# while an ANSI gate valve weighs more than 1200#. The cost of the valve is also similar, as is the weight difference.
Do you have a question about valves in your facility? Ask us about it! We are happy to offer technical support to companies in Wisconsin and Upper Michigan.
Stem Extensions for Plastic Gate Valves
One-piece and two-piece stem extensions for gate valves
Stem extensions are valve handle extensions designed for use on valves in areas where standard configuration valve handles are not accessible. They create a direct connection between the actual valve stem and the relocated valve handle. One-piece stem extensions attach directly to the valve stem, exposing the moving stem. Two-piece shaft extensions not only consist of the one-piece shaft extension, but also have an outer housing. The outer housing acts as an outer sleeve that fits over the inner shaft extension and protects the moveable inner shaft extension in downhole applications. Support brackets and plates are typically used with both types of extensions. They provide a strong anchor point for heavy gear operators on butterfly valves or prevent lateral movement on one-piece lever handle extensions.
resources
data sheet
Data sheet – Shaft extensions for gate valves
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