Double expanding gate valve pdf merge

Certificate nmxcc9001 mexican standards iso9001 no. Through conduit double expanding gate valves are double block and bleed valves as they can grant zero leak with pressure on the upstream and downstream side towards the body, even when the valve is fully open. As an oem and source of more than 20 industryrecognized brands, cameron delivers highquality solutions in the areas of valves, automation, and measurement. The valve can be trimmed to meet most specifications handling a wide range of products and services. Suprseal expanding gate valve product specifications the lvs suprseal gate valve is an api6d certified, made in the u. Neways expanding gate valves are in compliance with api6d and provide a superior bidirectional torque based mechanical seal. You will receive a pdf with stock valve pricing emailed to you.

Bolted bonnet, pressure seal and cryogenic designs are available. When valve is in backseat position, pressure is contained within the valve cavity and cannot ingress into bonnet or stem packing area. Double expanding gate valve scaling erosion globe valve sealing area without end cap leave a reply cancel reply. Valves for api temperature ratings of x and y are pressure derated as required per annex g of api 6a 20th edition. Learn about different types of gate valves that used in piping. The yoke sleeve is of forged stainless steel material.

The unique feature of the expanding gate valve is the double isolation. This has to do with psychology, if you dont know how the valves actually work you feel safer with a mechanically sealed valve compared with a pressure sealed valve. This special design permits that the sealing load increases as the differential pressure across the disc increases too, thus providing a tight seal throughout the entire range. Double expanding gate valve scaling valve knowledge platform.

A doubledisk parallel gate valve has two parallel disks that are forced. Gate valves gear operated bare stem for actuation 2 piece bonnet design 4 pdf machine is a pdf writer that produces quality pdf files with ease. Our xg series valves provide bubbletight sealing at all pressures in both directions by utilizing mechanical action to force the gate against the seats. These valves are pigeable and normally used for oil and gas. This permits the valve to be repacked while in service. The brass gate valve is a standard gate valve, which can be used for a variety of applications, including on some of our gravity hose kits.

Isv parallel expanding gate design achieves tight mechanical seal under variations in the line pressures by providing opposing gate forces to the upstream and downstream parallel seats at the end of the open and closed position. At closing, the gate and segment expand compressing the seats and thereby increasing the volume between the gate and segment. The bonnet has a deep stu,ng box in which packing rings are placed. Both types are full bore, bidirectional, capable of double block and bleed sealing, and ideal for pipeline pigging operations. Double expanding gate tiv valves doubleexpandinggate.

Expanding gate valves our cast body expanding gate valve is designed for use in liquid service applications. Slab and expanding gate valvesslab and expanding gate valves. Emissions after 500 cycles at ambient and 350 f issued by yarmouth research and technology lab for 16 inch class 150 gate valve after 500 cycles the measurement result was less than 50 ppm. Cameron is the leader in flow and pressure control technology. All valves are manufactured under documented quality processes. Double disc gate valves the so called double disc valve incorporates a double disc, double wedge and double seat system, which makes this design unique, being designed to assure a reliable operation under the most severe service conditions. Williams valve manufactures api 6d pipeline gate valves in both slab and expanding gate designs. Valve materials rays through conduit double expanding gate valves are manufacturedusing a wide range of materials, from carbon steel to alloys, in order to complywith all the possible ser vices hydrocarbons, mildly to highly corrosive, nace,etcetera and applications. The actual product may vary slightly from shown due to engineering approved variation.

This type of valve is very useful in transportation pipe lines for gas, crude oil and oil products. Technical data torques, turns and other technical data. Babcock supplies a 20 double wedge and double disc gate valve operated by electric actuator, for a special requirement received from a petronas refinery in malaysia. These economy gate valves are designed for startingshutting off flow, are supplied from stock as 1 f x f bsp, although there are a number of other sizes available on request. The movement of the parallel expanding gate provides a bubbletight mechanical seal to assure positive shutoff while reducing wear between the sealing surfaces and extending the valve life. These valves are a top entry design with floating seats, and thus both are serviceable while installed in the flow line. They are ideal for a variety of applications including leased automated custody transfer lact, product metering, aviation fueling, product isolation, blend. Dynamic analysis dynamic analysis is important for the valves operated by the process fluid itself check. In the second case the same expansion is also obtained in the valve open position. Gate valve through conduit gate valve double expanding. Types of gate valve and parts a complete guide for engineer.

With corrosion and chemical additives being one of the main caused of failure. Single and double expanding gate valves are available on re. This pipeline gate valve catalog provides an overview of our. Expanding gate valves expanding gate valves are high performance gate valves that possess functions. The wkm powrseal valve s throughconduit design provides these specific advantages resulting in reliable performance and long life. All model c1ex expanding gate valves are api 6d latest edition monogrammed equipment and are available in bore sizes ranging from 2 through 36. Construction is available with single expanding or double expanding system. It is available in flange or thread ends in standard bore sizes from 116. The gate female wedge is driven by the stem and a centralizer mechanism guide helps in retaining the gatesegment assembly until sealing through expansion is required. From the beginning, the dhv name has become associated with quality.

The double blockandbleed dbb cameron general valve twin seal plug valve reduces this constant wear by using two seating slips mounted independently on a tapered plug by dovetails, which mechanically retract from the seating surface prior to rotating. Double expanding gate valves are made by two sliding pieces. Solid particles cannot penetrate into the body, both when the valve is in the open or in the close position. Through conduit gate valves are designed to api 6d or api 6a. Wkm powrseal expanding gate valve schlumberger products. Its fullbore, nonthrough conduit, expanding gate design creates a strong, dependable seal with less wear. The flow coefficiency cv of a valve is the rate of gallons per minute of water at 60 f through a fully opened valve at a pressure drop of 1 psi across the valve. Us4585207a expanding gate valve with pneumatic actuator. Slab gate valve through conduit rising stem design walworth slab gate valves also named through conduit gate valve are manufactured and tested in accordance with the api6d standard. This type of valve includes in itself the features of a through conduit service and of a standard gate valve with a parallel seating surfaces. Global valve and controls trunnion ball valves, double. The mechanical characteristics make the scv wedge gate valve are ideal for bidirectional total flow system openshutoff applications with minimal turbulance and pressure drop. In the first case, the two halves of the gate are pushed against the seats in the valve closed position by having an internal stop acting on one of the two halves.

For nuclear service asme iii, admekblatter and rccm are available. This is double expanding gate valve animation by chris beck on vimeo, the home for high quality videos and the people who love them. Double disc gate valves continue to be the most rugged commonly used control mechanisms for onoff service. Double expanding gate valve scaling excessive gap due to erosion galvanic corrosion between different material of bolts and flange galvanic corrosion on wafer type.

Class 300 and 600 valves consist of a circular spiral wound gasket. Gate valves standard configurations basic cryogenic bellow seal gate valve description gate valves are primarily designed for onoff services when a straightline flow of fluid and minimum restriction is desired. Gate valves are designed to meet requirements of ansi b16. You will receive a pdf with stock valve pricing emailed to. The closure member of gate valves either stops or allows flow through the valve and acts somewhat like the opening or closing of a gate. Through conduit double expanding gate valve rays flow. A piston type pneumatic powered actuator 9 for operating a valve 10 of the expanding gate type wherein velocity of the pistonstem gate drive train is maintained substantially constant in the latter stage of the actuator stroke. When full port gate valve is required or double block and bleed valve is mandatory this design must be used. Seats are floating and sealing is made by the upstream seat which is energized by upstream pressure against the disc. If hydraulic pressure is bled off, the power spring and well pressure combine to close. This provides a superior valve in demanding applications including those requiring provable zeroleakage in double block and bleed service.

The use of industry standard thread full length studs and nuts also allows easy replacement should these items be lost or in need of replacement. Solid particles cannot penetrate into the body, both when the valve. Double block and bleed capability and high robustness are standard feature of this seat design. The closure member of gate valves either stops or allows flow through the valve and acts somewhat like the opening or closing of a gate and is called, appropriately, the gate valve. Tight seal is achieved and controlled through stem thrust only. Aug 24, 2017 valveworks usa model mds expanding gate valve operation explained. Through conduit double expanding gate valve rays flow control.

Handwheel operated slab gate valves features operating temperatures model fs valves are available with api 6a temperature ratings of l 50 f through y 650 f. The slab gate valve is through conduit and piggable. With the expanding gate design, it is possible for thermal expansion to occur within the body cavity while the valve is in the closed position. Expanding wedge gate valve the calvary c1ex castbody expanding wedge throughconduit gate valves are designed for corrosive or erosive pipeline service in oil and natural gas wellhead or other critical service applications in ansi 150 to 1500 class operating pressures. These valves contain a gate mechanism that when lifted opens the valve and when lowered closes it. Class 150 gate valves consist of a square joint in 2 and an oval one for all other sizes. Expanding gate valve features a nonrising stem with an expanding gate design to provide safe, dependable service in a variety of environments. Rapid seal abrasion is inherent in the designs of most ball and gate valves.

Through conduit expanding gate gate valves fluitek. Grease fittings the valve body may be lubricated through the grease fitting provided in the valve bonnet. Petrolvalves has been manufacturing double expanding gate valves since the late. This increase in volume reduces the pressure trapped in the body to a pressure less than initial line pressure. Types of gate valve based on body, bonnet connection. I can use acrobat distiller or the acrobat pdfwriter but i consider your product a lot easier to use and much preferable to adobes a. Depending on the valve service it can be supplied flatface gasket with graphite or ptfe. The valves adopt expanding gate operating principal to give a tight and positive seal against both upstream and downstream seats under a wide range of pressures and environmental condition. Installation this valve is doubleseated and bidirectional. Lokring fittings grange pipe connectors victaulic pipe joining systems.

Like a solid wedge metal seated gate valve, the wedge is angled with two interchangeable or reversible discs that stay aligned with the body seat rings for excellent sealing capacity. This means when a line is get heated by fluid and expand it does not create thermal blinding. Our double expanding gate valve can be engineered to achieve dib1. Brass gate valve gate valves cts centre tank services. Atv is a worldwide affirmed manufacturer of valves and actuators for the most demanding applications in the offshore industry, such as deep and ultradeep water, high pressure high temperature, highly corrosive services. These compact cex expanding gate valves provide double block and bleed. The actuator 9 includes an assembly of dual pistons 61,75 which are adapted to be driven by fluid pressure in one direction to operate the valve but are. Subsea through conduit double expanding gate valve. Gate valves are primarily designed to start or stop flow, and when a. Qtr also offers a fullport fabricated, compact cex expanding gate valve for applications inside the fence multiproduct manifolds where pigging is not typically required. But solid slab valves as the one shown in figure 6 is normally not accepted as a double isolation valve. Stu,ng box is designed with su,cient space to allow lantern ring to be.

A gate valve is generally used to completely shut off fluid flow or, in the fully open. Class 900 and above gate valves consist of a ring type joint. Onoff service valve, throughconduit, expanding gate design, rising stem cast or forged body, bolted bonnet constructions, full or reduced bore, bidirectional. The parallel expanding gate design provides a tight. Isv series gtds and gtde api 6d throughconduit gate valves are produced to meet or exceed applicable industry standards providing high product reliability at globally competitive cost of ownership. The valve trim consists of the stem, the gate, the disc or wedge and the seat.

The single expanding gate valves and the slab gate valves offer the advantage of a dimension and cost reduction, while the double expanding offers a high reliability on heavy duty. Gate valve is a linear motion valve that used to start or stop the fluid flow. Specifications of electrical actuators is covered in section b of this. During operation the gate assembly travels freely between the seal surfaces which will reduce the wear risk and prolong the valve service life. Valveworks usa model mds expanding gate valve operation explained. An inline check valve is provided behind the grease fitting to ensure a unidirectional flow. The through conduit service implies the continuity of fluid flow conduit, excluding any dirt accumulation in the body cavity. Through conduit construction offers body cavity isolation from the flow stream when the valve is fully open as well as fully closed. The everbilt lead free gate valves feature a the everbilt lead free gate valves feature a simple design that can quickly and reliably block or permit the flow of fluids, gases, or fumes. Suprseal expanding gate valve louisiana valve source. General valve twin seal dbb valve schlumberger products.

About franklin valve franklin valve manufactures the duraseal double block and bleed plug valve. This full bore, throughconduit gate valve features a mechanically sealing gate to assure positive shutoff. Lowexpansion foam combined agent and deluge foamwaterspray systems. Their extensive range of products includes trunnion mounted and rotary control ball valves, plus throughconduit slab and double expanding gate valves. Seat faces are outside the flow stream and in full contact with the gate, in both fully open and fully closed positions. True double block and bleed one valve to replace two traditional block valves metal to metal primary sealing system mechanically energized and not dependent on pressure metal to metal secondary sealing system does not rely on any elastomeric or plastic seals full hard facing on all 4 wedge surfaces a. This design allows complete removal from the valve when service is required. The full round bore through conduit design allows the fluid to flow. Gate valve description gate valves are primarily designed for onoff services when a straightline flow of fluid and minimum restriction is desired. Cegv expanding gate reliability the valbart cegv compact expanding gate valve provides longterm performance in critical pipeline and ancillary applications.