Standard offering for 5,000-psi [34.5-MPa] working pressure. Our family of companies is organized to provide expert solutions, equipment, and operational support to optimize your drilling and production operations. The extensions and adaptation for actuation are options regularly requested and provided. These valves do not have a bore through the gate itself; instead, the gate retracts into the valve … Premium content requires special account permissions. Our smaller 2- to 4-in nonrising stem version of the Pow-R-Seal API 6A expanding gate valve is commonly used in wellhead manifold systems because of its reliable mechanical seal and high pressure capability. sealing surfaces and extending the valve life. Video WKM Pow-R-Seal Double Expanding Gate Valve One of the industry's most trusted gate valves.
In the power industry, NEWCO gate, globe, and check valves and DOUGLAS CHERO forged-steel gate, globe, and check valves are ideal for standard and critical applications, such as steam distribution in power plants. Achieve dependable, heavy-duty performance in abrasive service conditions. Gate valves—one of the original valve designs—are ideally suited for on-off, primarily liquid, service. You may delete and block cookies from this site, but parts of the site may not function as a result. Join us October 27. All Rights Reserved. Every day, the oil and gas industry’s best minds put more than 150 years of experience to work to help our customers achieve lasting success. Because of the diversity of construction materials, trim offerings, and design combinations available with gate valves, they are appropriate for a wide variety of applications.
Metal-to-metal seal technology throughout. © 2020 National Oilwell Varco. There are four primary designs for gate valves. All valves are designed to stop, allow, or throttle the flow of a process fluid. Remotely control pressure and fluid volumes during flowback and well testing by deploying hydraulically actuated equipment. High-quality, through-conduit, expanding gate valves engineered for performance in critical isolation applications where a tight mechanical seal that is normally unaffected by pressure variations and vibrations is needed. Expanding Wedge Gate Valve The Calvary C1-EX cast-body Expanding Wedge Through-Conduit 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. They also claim to be more resistant to particle wear as the seats pull away before sliding up inside the valve. The movement of the parallel expanding gate provides a bubble-tight mechanical seal to assure positive shut-off while reducing wear between the Expanding Gate Valves – Model C1 ® API 6D. Pressure seal bonnets are designed for services with pressure in excess of 2,250 psi [15 MPa]. Double expanding gate valves are made by two sliding pieces consisting of a gate and a second segment (male and female wedge segment). The extensions and adaptation for actuation are options regularly requested and provided. Our patented single loaded-spring (SLS) stem seal design, used in Saf-T-Seal slab gate valves and WKM Pow-R-Seal double expanding gate valves, provides superior leak protection and a self-adjusting seal designed to reduce maintenance. Withstand the external pressure caused by the column of seawater at operating depths. Through-conduit and double block-and-bleed functionality. Meet the 7,500-psi working pressure demands of deep well drilling. In contrast with a slab or expanding gate valve, wedge gate valves are not piggable because of the void that is left in the bottom of the valve body when the valve is open. corrosive or erosive Pipeline service in oil and natural gas wellhead or other critical service Simple, rugged, and reliable through-conduit valve. You would choose an expanding gate valve when you need true double isolation and possible bleed as well in a single valve. The Calvary C1-EX cast-body Expanding Wedge Through-Conduit gate valves are designed for When the valve is fully open, gate valves are full bore, meaning there is nothing to obstruct the flow because the gate and pipeline diameter have the same opening.
Your email address will not be sold or shared with anyone else. Our expanding gate valve is a full-bore, through-conduit gate valve featuring a mechanically sealing gate to ensure positive shutoff. Nonrising stem designs are ideally suited for applications where vertical space is limited, in well applications, and where scraping or pigging is not required.
Enhance technical reliability in pipeline transmission and storage applications. All Model C1-EX expanding gate valves are API 6D latest edition monogrammed equipment and are available in bore sizes ranging from 2” through 36”. When the valve is completely closed, the gate and segment are wedged tightly against each seat. Expanding Gate The expanding gate is field-replaceable and provides a tight mechanical seal that does not rely on line pressure.
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You will receive a PDF with stock valve pricing emailed to you immediately upon signup. Screw-in bonnets are simple, durable sealing units that use pressure to seal. Rising stems are attached directly to the gate and provide a visual indicator of the valve position. Withstand temperatures up to 650 degF [343 degC]. Soft sealing gate valves (flexible wedge gate valves) main group from DN40 (mm) up to most commonly used 250mm to 300mm (6-8inches) but readily avilable up to at least 1200mm. The expanding gate valve can be trimmed to meet most specifications that require handling a wide range of products and services. To accept cookies from this site, please click the ‘I Accept’ button below. We hate spam.
The protected seat-face design of double expanding and slab gate valves eliminates degradation of the seat face caused by debris in the process fluid, which makes them ideal for liquid service. Reliability/Repeatability • Fire safe Design • Field repairable in line • External Thermal Body Relief •
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