{"id":9998,"date":"2024-09-13T06:37:56","date_gmt":"2024-09-13T06:37:56","guid":{"rendered":"https:\/\/ntval.com\/?page_id=9998"},"modified":"2024-11-20T02:40:29","modified_gmt":"2024-11-20T02:40:29","slug":"double-disc-gate-valve","status":"publish","type":"page","link":"https:\/\/ntval.com\/fr\/double-disc-gate-valve\/","title":{"rendered":"Vanne \u00e0 double disque"},"content":{"rendered":"\t\t
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Trusted Double Disc Gate Valve Manufacturer<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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NTVAL provides durable Double Disc Gate Valves for large-scale industrial applications. Known for reliability, long service life, and excellent sealing, each valve is precisely crafted to meet strict industry standards, ensuring optimal performance in tough conditions.<\/div>\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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Reliable Double Disc Gate Valve<\/h2>\t\t\t\t<\/div>\n\t\t
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The Double Disc Gate Valve is a versatile and reliable valve used in various industrial applications. It features a robust design that ensures long-lasting performance and meets the stringent standards set by ASME, API, and BS. These valves are constructed with a range of materials and components that provide strength, durability, and effective sealing. Below are the key components and features that make up the Double Disc Gate Valve:<\/div><\/div><\/div><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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Quality Control<\/h2>\t\t\t\t<\/div>\n\t\t
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The PMI test verifies that the metal used in the double disc gate valve matches required specifications, confirming it is suitable for use.<\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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PMI Test<\/h5>\t\t\t\t<\/div>\n\t\t\t\t<\/a>\n\t\t
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The sealing test checks if the double disc gate valve creates a proper seal by applying pressure, confirming it can prevent leaks.<\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Sealing Test\u200b<\/h5>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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The low emission test checks how well the double disc gate valve minimizes harmful gas release by testing its ability to meet standards.<\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Low Emission Test\u200b<\/h5>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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The impact test evaluates how well the double disc gate valve handles force, confirming it can withstand shocks without damage.<\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Impact Test\u200b<\/h5>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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Dimension inspection checks the measurements of the double disc gate valve\u2019s components, verifying they fit properly for smooth operation.<\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Dimension Inspection\u200b<\/h5>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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The painting thickness test measures how much paint covers the valve, confirming there is enough coating to protect it from rust.<\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Painting Thickness Test\u200b<\/h5>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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The PT test detects small cracks in the double disc gate valve by applying liquid to its surface, revealing any hidden flaws.<\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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PT<\/h5>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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Material inspection verifies that the double disc gate valve\u2019s components are made from the correct materials to handle pressure and temperature needs.<\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Material Inspection\u200b<\/h5>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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Our Valve Applications in Key Industries <\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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Discover how our advanced valve solutions improve flow control, delivering enhanced efficiency, safety, and strict quality assurance.<\/div><\/div><\/div><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t
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The double disc gate valve provides a strong seal, preventing leaks and handling harsh chemicals, making it perfect for chemical processing plants.<\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Chemical Processing\n<\/h5>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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In the petrochemical industry, double disc gate valves manage high pressure and corrosive fluids, making them a reliable choice for safe operation.<\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Petrol Chemical\n<\/h5>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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Double disc gate valves withstand extreme conditions in O.P.G. and nuclear plants, providing safety and reliability in these critical environments.<\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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O.P.G & Nuclear\n<\/h5>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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The mining industry benefits from double disc gate valves, as they manage abrasive materials and rough conditions, allowing long-lasting performance underground.<\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Pulp\n<\/h5>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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The mining industry benefits from double disc gate valves, as they manage abrasive materials and rough conditions, allowing long-lasting performance underground.<\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Mining<\/h5>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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Double disc gate valves work effectively in water and sewage systems by preventing leaks and controlling large volumes of flow efficiently.<\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Water & Sewage\n<\/h5>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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In steam systems, double disc gate valves provide reliable pressure control, preventing leaks and allowing safe, smooth steam flow throughout.<\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Steam System\n<\/h5>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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Double disc gate valves handle the high heat and pressure in boiling systems, making them a dependable choice for thermal processes.<\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Boiling System\n<\/h5>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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Get More Versatile Valve<\/h2>\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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Gate Valve<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/a>\n\t\t\n\t\t\t\t

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Ball Valve<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/a>\n\t\t\n\t\t\t\t

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Globe Valve<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/a>\n\t\t\n\t\t\t\t

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Check Valve<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/a>\n\t\t\n\t\t\t\t

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Plug Valve<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/a>\n\t\t\n\t\t\t\t

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Butterfly Valve<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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\n\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/path><\/svg><\/span>\n\t\t\t\t\t\t\t\t<\/path><\/svg><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\tDouble Disc Gate Valve: Body and Bonnet<\/a>\n\t\t\t\t\t<\/h4>\n\n\t\t\t\t\t

Body<\/h4>
The Double Disc Gate Valve body is available in both cast and forged steel, designed to meet ASME, API, and BS standards. The body-bonnet connection uses a pressure seal gasket, secured by bolts on the bonnet flange. The valve ends are typically butt-welded, with flanged options available upon request.<\/div>
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Bonnet<\/h4>
The bonnet is usually made from the same material as the body and is designed with extra wall thickness to meet API 600 standards. A backseat bush in the bonnet allows for repacking while the valve is in service. The bonnet also features a deep stuffing box with ample space for packing rings and a lantern ring.<\/div><\/div><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t
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Yoke<\/h4>
The yoke is a separate, rigid component designed to handle the thrust of the actuator. It has large windows for easy access and ventilation of the packing area. The yoke is connected to the body using a two-piece clamping ring and is typically made of cast carbon steel unless specified otherwise.<\/div>
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Stem<\/h4>
The stem is made from stainless steel, machined from solid bar stock, and threaded into the upper wedge. It features a conical shoulder to create a reliable backseat seal, allowing for maintenance while the valve is in service. The stem is carefully polished to reduce friction and enhance corrosion resistance.<\/div><\/div><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t
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Gland Bushing and Gland Flange<\/h4>
The gland bushing and flange are designed as two self-aligning pieces to apply even pressure during packing. The upper part of the gland is spherical for smooth operation. Typically made from carbon steel, other materials can be provided if needed.<\/div>
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Seat Ring<\/h4>
The seat rings are forged from stainless steel and hard-faced with a 2 mm layer of Stellite-6. They are welded to the body and can be replaced if necessary. The sealing surfaces are precisely lapped to provide a secure seal, with hardness differences maintained according to API 600.<\/div><\/div><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t
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Discs<\/h4>
The discs are forged from the same material as the valve body and are hard-faced with Stellite-6 for durability. The revolving design of the discs helps distribute wear evenly, extending the valve’s service life. These discs are specifically designed to ensure a tight seal when in operation.<\/div>
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Yoke Sleeve<\/h4>
The yoke sleeve can be easily removed from the bonnet or yoke while the valve is in service. It is typically made of cast aluminum bronze, chosen for its wear resistance and high melting point. Ball bearings are used in the yoke sleeve assembly to provide smooth operation.<\/div><\/div><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t
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Back Seat<\/h4>
The back seat is available as a threaded stainless steel bush or as an integral part of the valve, often hard-faced with Stellite-6. It allows the valve to be repacked while under pressure. The back seat is constructed to handle high-pressure conditions effectively.<\/div>
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Handwheel<\/h4>
The handwheel is available in either cast or fabricated steel, designed for easy operation. Various control options, such as chain wheels or gear operators, are available based on specific application needs. These options provide flexibility in operating the valve across different settings.<\/div><\/div><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t
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Pressure Seal Gasket<\/h4>
The pressure seal gaskets are typically made of compressed graphite with reinforced carbon fiber edges. Stainless steel gaskets can also be supplied if required. These gaskets are engineered to maintain a reliable seal under high-pressure conditions.<\/div>
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Packing<\/h4>
Packing consists of preformed rings made from high-grade graphite, with anti-extrusion rings placed at the top and bottom. The design is chosen to ensure a dependable seal across a variety of conditions. Other packing materials can be provided for specialized applications.<\/div><\/div><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t
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Disc Retainers<\/h4>
The disc retainers are made from the same material as the valve body and are firmly connected to the upper wedge. They keep the discs in place while allowing them to rotate, helping to distribute wear evenly. The retainer assembly is designed to provide consistent performance over time.<\/div>
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Spacer Ring<\/h4>
The spacer ring covers the upper part of the pressure seal gasket and is made from the same material as the valve body. It supports the integrity of the seal under high pressure. The single-piece design adds strength and durability to the overall valve structure.<\/div><\/div><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t
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Gasket Retainer<\/h4>
The gasket retainer is typically made from the same material as the valve body and is constructed in four segments to minimize gaps. It supports the forces transmitted from the bonnet through the pressure seal gasket. This design is calculated to handle high pressures without cracking.<\/div>
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Bonnet Retainer<\/h4>
The bonnet retainer is strong enough to manage the forces from the bonnet screws and is made from the same material as the valve body. It is carefully machined to match the body for perfect alignment. This precision ensures smooth operation and maintains the valve’s performance.<\/div><\/div><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t
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Yoke Clamp<\/h4>
The yoke clamp connects the valve body and yoke using a bipartite clamping ring. This internal connection is conical, providing a secure fit and easy maintenance. The design ensures a stable connection that supports the valve’s reliable operation.<\/div>
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Upper and Lower Wedges<\/h4>
The upper and lower wedges are made from forged or cast steel, matching the valve body material, and are hard-faced with Stellite-6. These wedges are designed to stay engaged while sliding, ensuring the discs are pressed tightly against the seat rings. Springs between the wedges help absorb forces and allow for smooth contact.<\/div><\/div><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t