Installing a gear box on a Trunnion ball valve is no easy task. In fact, if you want to learn be ready to get your hands messy. It is recommended to buy some gloves that are suitable to wear for the lubrication process. Remember to always consult the manufacturer first.
Start by generously lubricating the stem of the valve. We use an industrial high-performance grease that works with the same temperature ratings as our valve.
Apply grease to the stem, stem key, and dowel pin and insert the stem key into the stem slot. The dowel pin will be inserted through the stem key and into the stem to hold the stem key in place within the stem slot.
Apply the grease to four (4) of the bolts and insert them into the mounting pad in the holes closest to the end flanges. This is necessary due to having less clearance to insert these four (4) bolts after the gear is installed due to the curvature of the valve body.
Once it is generously lubricated the gearbox should fit easily over the stem and stem key. Inside the gear housing there is a slot that fits the assembled stem and stem key. You need to ensure proper alignment of the slot in the gear housing with the stem and stem key. The travel stops may need to be loosened and the wheel turned in order to properly align the bolt-holes in the bottom of the gear housing with the bolt-holes through the mounting pad.
Next, insert the other four (4) bolts through the bottom of the mounting pad and thread them into the bottom of the gearbox, also threading in the four (4) bolts that were inserted into the mounting pad at an earlier stage. Next, add the washers and nuts to the bolts and tighten them down. Once you have installed the handwheel be sure to operate the valve one full cycle and adjust the travel stops accordingly to the open and closed positions. This means turning the handwheel to go from its fully open position to fully closed position, adjust the travel stop for the closed position. Then turn the handwheel back the other way to go from its fully closed position to fully open position, adjust the travel stop for the open position.
Check out the video below as we show you how to install a gearbox by our valve experts. Contact us with any questions 281-463-1474 or Info@gvcintl.com
Many times a client of ours will ask us to do additional testing to the valve/s before they purchase. One of the tests that is asked for is called hydrostatic shell testing and because we have our certification for API 6D such a test like this is no problem at all. Hydrostatic shell testing means that the shell, or the body of the valve will go through a pressure test. All valves MUST be hydrostatic ( WATER) shell tested to verify the valve can handle the maximum pressure it was built and designed for. What you see in the video below is a hydrostatic test pressure, usually 1½ times the rated working pressure is applied to an assembled valve to verify the structural integrity of the pressure containing parts. Pipeline valves commonly go through these types of tests to ensure there are no leaks. Below you see one of our API 6D, Trunnion ball valves going though the hydrostatic test and the test will continue for 4 hours. We stride for customer satisfaction and do not have any complaints. Contact us for more info www.gvcintl.com
One of our newest valves on the market is the Through conduit gate valve. Sometimes also referred to as Thru conduit. It is used for pipe pigging, but can be found more in “pipelines of subterranean heat steam, petroleum, natural gas production, transmission, and storage” The GVC Thru conduit gate valve is API 6D certified and has Double Block and Bleed capabilities. We offer these valves in 2” all the way through 36”. Many companies in the petrochemical industry prefer to use the Thru conduit gate valves as the valves are more suitable to corrosive fluids versus their ball valve counterpart. This valve is great for long distance transportation service of crude oil and natural gas.
The Double Block and Bleed is a special feature that you can find among our Trunnion Ball Valves and Expanding Gate Valves. The idea of having DBB was first created by engineers. According our our ValveMD, “The DBB feature of the valve or valves is the ability to segregate two pressure sources and to bleed/vent pressure in the void between the two sealing elements (blocks). The bleed may be in the pipework/pipeline when two valves are used, or in the valve body between the two seats when the valve has the Double Block and Bleed (DBB) feature.”
You may find Double Block and Bleed valves in many types of industries, including; Gas and Liquid pipelines, Production, Processing Oil and Gas, and more. This feature ensures zero leakage which is why they are popular in pipelines.
Do not be confused with Double Isolation Bleed which according to API means, “API 6D defines a Double Isolation & Bleed Valve (DIB) as a “single valve with two seating surfaces, each of which, in the closed position, provides a seal against pressure from a single source, with a means of venting/bleeding the cavity between the seating surfaces. The note adds that this feature can be provided in one or in both directions.”
For any questions regarding our Double Block and Bleed Valves, be sure to reach out to one of team members.
When a valve manufacturer is API 6D certified it means that they have a certificate that certifies their valves are tested to API standards. There are different specifications of API. For instance, API 6D is a specification for pipeline valves. “API 6D specifies requirements and gives recommendations for the design, manufacturing, testing and documentation of ball, check, and gate valves for application in pipeline systems.”
Not only are our Trunnion ball valves API 6D certified but we also carry the API Q1 specification. This allows us to mark our valves. When you see this mark you will immediately know that GVC valves have been manufactured in a quality management system.
What does it mean to be API 6D and API Q1 certified? Global Valve and Controls is recognized by API and other industries for our product quality. It also means that every single one of our products are marked therefore if any future questions arise of a valve we will know exactly which valve it is.
What does it mean to our clients? Proof that our products are API as well as meet the specifications and our quality is consistent. Our clients are also aware that we have a management system in place that provides any assurances.
In conclusion, we stand behind our products 100%! If you are not satisfied with our service or our products please contact us so that we can fix it immediately.
Many times a customer will call and ask if we can offer any valves for cryogenic service. Cryogenic meaning very low temperatures. We can happily say that we do carry a few valves that are made for such services. Companies that work with LNG (Liquified Natural Gas), oxygen, helium and such are the most common clients that we have that need these specific valves. What makes cryogenic valves different than standard valves? This is possibly one of those most frequent questions asked, and the answer has to do with the temperature. A cryogenic ball valve can fully work in temperatures as low as -320 degrees Fahrenheit and at pressure ratings as high as 750 psi.
GVC Valves series FS525, FS600, YFS and our 790 are all compatible with cryogenic conditions. To learn more please visit our website.
Different types of bores for ball valves – full port, reduce port and V-port. These three types have different constructions and purposes.
Full Port Ball Valve – A full-port, also known as a full bore, ball valve has a bore internal diameter (ID / inside diameter) approximately equal to the pipeline ID. This allows for reduced friction and pressure loss across the valve. With a full port ball valve there is NO restrictions to the flow of medium, but the valve can be more expensive. This type of bore is ideal for situations where pigging may be necessary. Global Valve & Controls (GVC) series CFS and 2T/3T split body and welded design, full port, flanged ball valve combines its sealing technology and design expertise for over 25 years with the versatility to solve even the most demanding applications . This technology and expertise is widely used in the chemical, pulp and paper, petrochemical, food and beverage and refining industries.
Reduce Port Ball Valve – A reduce-port, also known as a reduce bore, ball valve is a valve in which the bore is reduced to one or two nominal sizes lower. This provides a more restricted flow path, generally resulting in higher energy losses. Global Valve & Controls (GVC) series RCFS and R2T/R3T ball valves offer both full port and reduce port valves. Known for its design features , superior sealing areas and various stainless alloys , the GVC brand is widely recognized as a leader in providing valve and flow control solutions for the energy , and oil and gas industries’ for a general all around great product and a fair price.
V- Port Ball Valve – A V-port ball valve has either a “V” shaped ball or a “V” shaped seat. This type of valve also is known as a control valve in which the flow velocities need to be controlled / regulated as required per the application.
In closing Global Valve & Controls ball valves can be used in a variety of applications and markets, such as pipeline transmission, pig launchers, storage facilities, pulp and paper facilities , food and beverage , gas processing , industrial, and many more . Troy Richard, founder of Global Valve & Controls (GVC) explains that ball valves provide reliable leak protection and fugitive emissions concerns. Ball valves can be open and close quickly in which saves time and money on all automation packages.
Please visit is at Globalvalveandcontrols.com or GVCINTL.com 281-463-1474
When I first started working at a valve company I had to research quite a bit on what valves were and what they were used for. Yes, I was a newbie. There is so much information on the web today that I could go on and on but focusing on one of the products that the company is most known for will cut down my blog from about 10 pages to a paragraph. (Plus, who wants to read 10 pages!!?)
Trunnion ball valves are the “Big guys”, at our warehouse and I was very intrigued by the size of them! The sizes can range anywhere from 2INCH to 48INCH. Working at the company, I had to learn my way around the valves. At first it was over whelming because not all valves are made the same. I created a list of 5 questions to help me.
1.What is the ANSI class?
2.What is the material?
3.What is the size of the valve?
4.What are the end connections of the valve?
5.Are you looking for Reduced port or Full port?
Understanding what the valve is used for helped me better understand what exactly the customer was wanting. I will not say that I am an expert in no way on valves but working in the environment has really made me appreciate what valves are used for and how we use them in our everyday lives.
My curiosity spiked when I began reading how these trunnion ball valves were used. Having lived in Texas, (O&G state), I know pipelines are the most common areas where one would see these kinds of valves. I of course got to my computer and started researching more about pipelines, which is another blog to come. I will however include that pipelines do not just carry oil, but a wide variety of liquids and gases. An interesting little fact I picked up along the way is that there used to be a vodka pipeline, now how crazy is that!
In the world of valves there is always so many to choose from. Flanged ball valves, Threaded ball valves and the list goes on! Other things you must know when calling in for a quote is the size, trim, material, reduced or full port of the valve and most importantly what the valve will be used for. When you have finally decided that you need a flanged ball valve for your application, you will need to decide if you will want a 1, 2 or 3 piece valve. You will make a decision based on cost, maintenance and if it will need to be automated.
First, lets take a look at a one piece flanged ball valve. Contrary to what others say, a 1 piece design ball valve or unibodies are not always the cheapest and you can automate any flanged ball valve with a mounting pad. These valves are not repairable so if one breaks you will need to replace the whole valve which is time and money. If you are looking into a 1 piece flanged ball valve, be sure to check out our Series FS or http://gvcintl.com/files/GVC%20Series%20FS.2011.pdf
A 2 piece and a 3 piece ball valve was definitely designed with maintenance in mind as it can be easily cleaned. The biggest difference between the two is that the 3 piece can be taken out of line without affecting the two end caps while the 2 piece can not. As far as cost, a 3 piece is more expensive up front but in the long run it could be a wiser choice as the seats and seals are replaceable and with a 2 piece you will need to replace the valve entirely if there are any issues. If you are looking for a 2 piece flanged ball valve, take a look at our Series CFS, FS600, or
Stainless steel ball valves are definitely one of the popular materials that many people buy. They are perfect for the food and beverage industry, agriculture as well as the pulp and paper industries. The reason behind this is because stainless steel does not corrode and when dealing with food which we consume you do not want your machines corroding. White it is true that stainless steel (SS) does not easily corrode or rust, it really depends on the oxygen level in atmosphere. For example, if it is a poor air circulation environment, depending on the grade of the SS valves the valves may or may not corrode. Therefore, it is always important when dealing in such circumstances to get a high grade type of SS valve.
The material stainless steel is not to be confused with carbon steel as carbon steel will rust at one point in its life. The difference between the two metals is the amount of chromium present. Stainless steel’s resistance to corrosion and staining, low maintenance, and familiar lustre make it an ideal material for many applications. The alloy is milled into coils, sheets, plates, bars, wire, and tubing to be used in cookware, cutlery, household hardware, surgical instruments, major appliances. These are examples of a few items one may be familiar with.
It is very important to know which grade of SS you need for your application as stated above if the grade is low, it will not last or you will have problems later down the road. Therefore, always consult with the manufacturer before buying. Global Valve and Controls can provide you with 316SS, 317SS and 304SS just to name a few. There are many different grades and one may not know that 304 is not to be used in the presence of sulfuric acid.