The double expanding gate valve is equipped with a twosegment gate. Double block and bleed capabilities internal pressure relieving through self relieving seats secondary sealant injection at seats and stems full port thru conduit for passage of pigs scv thru conduit. Expanding gate forms tight positive mechanical seal. Double expanding gate tiv valves doubleexpandinggate. The gate is attached and driven by thestem and a centralizer. The double block and bleed feature of this valve and the seats fixed in the body require always to provide a body pressure relief system. For category e, f, h, j and k valve gearing dimensions, contact factory. This full bore, throughconduit gate valve features a mechanically sealing gate to assure positive shutoff. Bel valves pipeline gate valves double expanding gate valve double expanding gate valve material specification trim material class trim material code tc1 ta1 ts1 material carbon steel, nace stainless steel, nace stainless steel, nace temperature range 19. The end result is an extremely heat resistant seal that is unaffected by line pressure or vibration.
This design allows complete removal from the valve when service is required. 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. Global valve and controls trunnion ball valves, double. Applications duraseal is an excellent choice for applications that require frequent isolation and testing of gas or liquids. Velan offers one of the most comprehensive valve product lines available from any manufacturer. Slab gate valves thruconduit slab style gate valves are a popular item for the pipeline and tank farm industries.
Gate valves are designed with a sealing unit to provide a tight seal around the stem. The yoke sleeve is of forged stainless steel material. The wkm powrseal valves throughconduit design provides these specific advantages resulting in reliable performance and long life. Orion through conduit expanding gate valve duration. 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. The wkm powrseal gate valve is a premium through conduit expanding gate valve. Because of their diversity of construction materials, trim offerings, and design combinations, gate valves are appropriate for a wide variety of applications. Through conduit expanding gate gate valves fluitek.
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. Gwc produces a full line of api6d through conduit gate valves in both slab and expanding gate design. We produce gate, globe, check, ball, butterfly, knife gate, and engineered severe service valves and steam traps in sizes up to nps 64 dn 1600 and for services up to asme. The seats are press fit into the body to affect a metaltometal bodyseat seal. Our patented single loadedspring sls stem seal design, used in saftseal slab gate valves and wkm powrseal double expanding gate valves, provides superior leak protection and a selfadjusting seal designed to reduce maintenance. Through conduit double expanding gate valve rays flow. Velan is a world leader in the design and production of a wide range of cast and forged steel gate, globe, check, ball, tripleoffset butterfly, knife gate, highly engineered severe service valves, and steam traps.
The positive, mechanical seating force of the lockinplace seals holds with zero leakage. Gate valves api 600 a world leader in valves velan. Flexible wedge, split wedge, slab gate and doubledisk configurations cover a range of requirements to. Suprseal expanding gate valve louisiana valve source. Through conduit double expanding gate valve rays flow control. For motorization contact factory for correct gear model and valve outline dimensions. 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.
Gwc italia proven technology for individual valve solutions worldwide 6 api 6d through conduit slab gate valve features main features slab gate valve n full bore for pigging. In the first case, the two halves of the gate are pushed against. Through conduit gate valves are manufactured as per standard api 6d. It is available in flange or thread ends in standard bore sizes from 116. Expanding gate valve and m303 fabricated slab gate valve.
Double expanding gate valves have a gate wedge split into two parts, mainly. Gate valve through conduit gate valve double expanding. But solid slab valves as the one shown in figure 6 is. The compact expanding gate valve is constructed for increased reliability and ease of operation and maintenance. This is double expanding gate valve animation by chris beck on vimeo, the home for high quality videos and the people who love them. A gate valve is the most common type of valve that used in any process plant. Wkm powrseal expanding gate valve schlumberger products. From the most common application to the most severe, velan has a solution. Isv series gtds and gtde api 6d through conduit gate valves isv api 6d gate valve production range body size inches legend. In service, these valves are either in fully open or fully closed position. Expanding gate valve features a nonrising stem with an expanding gate design to provide safe, dependable service in a variety of environments. Double expanding gate valves are made by two sliding pieces. Atv takes full responsibility in selecting the most suitable size for operating.
All dimensions are in inches, all weights are in pounds. Expanding gate valves our cast body expanding gate valve is designed for use in liquid service applications. The parallel expanding gate design provides a tight mechanical seal which is normally unaffected by pressure. The wkm powrseal gate valve is the ultimate choice for full port, through conduit, positive shutoff gate valves.
The slopes are designed to cause the expansion of the gate in both open and closed positions with the valve closed, the gate provides a double barrier with the valve open, a fullbore conduit is isolated from. In the second case the same expansion is also obtained in the valve open position. Flexible wedge, split wedge, slab gate and doubledisk configurations cover a range of requirements to meet any user need, from general service to severe conditions with gross thermal transients or dualphase fluids. 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. Dual expanding plug valves are designed and manufactured according to the following international codes and standards. 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. From hightemperature coking units to food and pharmaceutical services, gate valves can be trusted to reliably perform. The slopes are designed to cause the expansion of the gate in. Velan products cast steel bolted bonnet valves gate. The protected seatface design of double expanding and slab gate. When the gate valve is fully open, the disk of a gate valve is completely removed from the flow. S slab gate e expanding gate special order expanding gate. Through conduit double expanding gate valves are double block and bleed. The doubledisc parallelseat gate valve is often favored for hightemperature steam service because it is less likely to stick in the closed position as a result of change in temperature.
Gate valves are designed to meet requirements of ansi b16. Types of gate valve and parts a complete guide for engineer. The use of industry standard thread full length studs and nuts also allows. Solid particles cannot penetrate into the body, both when the valve is in the open or in the close position. The through conduit double expanding gate valve comprises of a two piece wedged shape assembly consisting of a gate and a segment. Since 1842, is the leading company in industrial valve manufacturing for fluid control and vapor control technologies made in a wide variety of materials such as carbon and alloyed steels, austenitic and duplex stainless steels, nickel alloys, ductile iron, and bronze, just to mention a few, which are available as gate, globe, check, ball, pressure seal, awwa butterfly and plug valves, in the. Petrolvalves has been manufacturing double expanding gate valves since. Bolted bonnet, pressure seal and cryogenic designs are available.
Cast steel with outside screw and yoke, rising stem, nonrising handwheel, and removable yoke sleeve. Subsea gate valves the bel valves subsea gate valve range provides the ideal solution for heavy duty onoff applications in the challenging subsea environment and can be supplied in bore sizes from. Slab and expanding gate valvesslab and expanding gate valves. 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. For buried service or offshore applications, contact factory. Velan is a world leader in the design and production of a wide range of cast and forged steel gate, globe, check, ball, tripleoffset butterfly, knife gate, highly engineered severe service valves, and steam traps offering superior performance across all major industrial applications. These valves are readily available in size 4 and larger, class 150 and class 300, for piping systems requiring the positive shut off. Reliable, tight shutoff and lowpressure drop operation characterize the flowserve range of gate valves. Double block and bleed animation for industrial valve company. The unique feature of the expanding gate valve is the double isolation and bleed.
Petrolvalves double expanding gate design permits full operability in any service and design condition. Double isolation and bleed dib1 both seats bidirectional. 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. Double block and bleed capabilities internal pressure relieving through self relieving seats secondary sealant injection at seats and stems full port thru conduit for passage of pigs scv thru conduit expanding gate bidirectional with preferred pressure side expanding mechanical gate forms positive tight sealing seals at low and high pressure. Construction is available with single expanding or double expanding system. The parallel expanding gate design provides a tight mechanical seal which is normally unaffected by pressure variations. It is available in flange or thread ends in standard. This full bore, throughconduit gate valve features a mechanically sealing gate to assure. Proven technology for individual valve solutions worldwide. The slab gate valve is the workhorse of pipeline gate valves.
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