Api 6d slab gate valves are essential components used in pipelines and industrial applications for efficient flow control and tight shutoff.
Api 6d slab gate valves are essential components used in pipelines and industrial applications for efficient flow control and tight shutoff.
API 6D slab gate valves are designed for reliable on/off service in oil, gas, and petrochemical pipelines. They feature a parallel gate design, ensuring minimal pressure drop and high sealing performance.
Complies with API 6D specification for pipeline valves, covering design, materials, manufacturing, testing, and documentation for pressures up to ASME Class 2500.
Slab Gate Valve features a flat or parallel gate suitable for on/off service, with low friction and bi-directional flow capability.
| Component | Material Options (Typical) | Notes |
|---|---|---|
| Body & Bonnet | ASTM A216 WCB / A105 / Stainless Steel | Carbon or stainless steel depending on application |
| Gate / Disc | Stainless Steel / Stellite-faced | Provides high corrosion and wear resistance |
| Stem | ASTM A182 F6a / F316 / Alloy Steel | Screw or non-rising stem options |
| Seat | Metal (hard-faced) or Soft Seated PTFE | Soft seats for bubble-tight shutoff, metal for high-temp |
| Bonnet Bolting | ASTM A193 B7 / B16 / Alloy Steel | Ensures pressure integrity |
The API 6D Slab Gate Valve is a high-performance isolation valve engineered for robust on-off flow control in demanding pipeline applications, particularly suited for oil, gas, and slurry transport systems. Compliant with API 6D standards for pipeline valves, this Slab Gate Valve features a through-conduit, flat gate design that ensures unobstructed flow and facilitates pigging for pipeline maintenance. Constructed from forged ASTM A105 carbon steel or A182 F316 stainless steel, it offers exceptional corrosion resistance with coatings like epoxy or 3LPE, making it ideal for high-pressure environments up to PN420 (Class 2500) and temperatures to 425°C in refineries, gas transmission, and offshore platforms.
Precision-manufactured with advanced forging and heat treatment, the API 6D Slab Gate Valve undergoes rigorous non-destructive testing (RT, UT, MT, PT) to meet ASME B16.34 pressure-temperature ratings. Available in sizes from 2" to 48" (DN50 to DN1200) with flanged or butt-weld ends per ASME B16.5/B16.25, it supports both manual and actuated operation, with outside screw and yoke (OS&Y) rising stem for clear position indication. The slab gate, often hard-faced with Stellite #6, ensures bidirectional sealing and abrasion resistance against slurries or corrosive media, achieving Class VI shutoff per API 598. Hydrostatic shell tests at 1.5x rated pressure confirm tensile strengths above 485 MPa, ensuring durability under cyclic loading.
The Pipeline Isolation Valve is designed for minimal pressure drop (Cv up to 20,000) due to its full-bore, through-conduit structure, making it ideal for long-distance pipelines where flow efficiency is critical. Its Corrosion Resistant Gate Valve properties, enhanced by NACE MR0175 compliance for sour service, protect against H2S, chlorides, and other aggressive media in offshore or buried applications. Optional features like double-block-and-bleed (DBB) and cavity relief systems enhance safety in high-pressure gas or liquid systems. Face-to-face dimensions align with API 6D, ASME B16.10, and BS EN 558 for seamless integration.
Compared to wedge gate or ball valves, the Slab Gate Valve excels in dirty service applications, handling abrasive media like slurries without clogging, while its through-conduit design supports pipeline pigging, unlike traditional gate valves. It offers 3-5 times longer service life in high-pressure scenarios due to its robust slab gate, which minimizes wear under heavy loads. Customizable with electric or pneumatic actuators for automation, it suits remote operations in gas gathering or crude oil pipelines. The valve’s compliance with API 6FA for fire safety and SIL 3 for critical systems ensures reliability in hazardous environments.
Addressing challenges like pipeline erosion, leakage under high differential pressures, and maintenance in abrasive flows, the High Pressure Gate Valve incorporates self-cleaning gates and secondary seals for enhanced safety. Its value-engineered design reduces lifecycle costs, making it a cost-effective choice for engineers seeking durable Pipeline Isolation Valve solutions. Whether isolating flow in upstream oil production or managing slurry transport in mining, the API 6D Slab Gate Valve delivers unmatched performance, reliability, and compliance for global industrial needs.
Engineered for high-pressure pipeline isolation with through-conduit design and corrosion resistance.
Gate valves have a simple design, widely used in low pressure-drop services. Their full-port design ensures unobstructed flow and no pressure drop, while also allowing pipeline cleaning with a pigging system.
A resilient seated gate valve with a non-rising spindle consists of the following parts. The body is the largest element of the valve, with the bonnet bolted for cleaning and maintenance. The wedge slides down to press the valve seat for complete shutoff and moves upward to allow flow. Over the last century, the construction has remained consistent, with improvements in service life, sealing performance, and corrosion resistance.
Modern gate valve bodies are more compact and sleek, enabling installation in limited space conditions while maintaining durability and efficiency.
Moves vertically to open or close, sealing against the seat for shutoff.
Made of ductile iron, it is the main housing that contains the fluid flow.
Ensures tight sealing when the wedge presses against it.
Transfers rotational motion to vertical movement of the wedge.
Supports the stem to reduce wear during operation.
Bolted to the body for easy cleaning and maintenance access.
Provides sealing around the stem to prevent leakage.
| Organization | Standard | Description |
|---|---|---|
| ANSI | American National Standards Institute | General industrial standards |
| API | American Petroleum Institute | Standards for oil and gas industry |
| ASME | American Society of Mechanical Engineers | Boiler and pressure vessel codes |
| BS | British Standards | UK national standards |
| GB, JB, HG | China Valve Standards | Chinese national and industry standards |
Upstream, midstream, and downstream operations, including drilling, refining, and transportation.
Handling corrosive and hazardous chemicals in various chemical plants.
Steam, water, and fuel systems in thermal, nuclear, and hydroelectric plants.
Municipal water supply, wastewater treatment, and industrial water management.
Heating, ventilation, and air conditioning systems in commercial and industrial buildings.
Sterile and hygienic applications, precise flow control in sensitive industries.
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