Introducing the state-of-the-art Spring Loaded Double Parallel Sliding Gate Valve, a marvel in modern engineering brought to you by SNT Machinery (Qingdao) Co., Ltd. This innovative valve offers substantial advantages over traditional wedge gate valves, boasting a significantly smaller operating torque and more compact drive size. The cutting-edge internal valve plate is designed with an INCONEL butterfly spring, replacing the conventional coil spring, ensuring effortless assembly within the valve body. Featuring a revolutionary special compensation structure design, it effectively prevents jamming issues under high-temperature conditions, avoiding any adhesion or wedge extrusion. Both the valve plate and seat surfaces are meticulously hardened through advanced techniques such as hard alloy overlay welding and surface spraying with Co-Cr-Ni alloy, WC, boron, and more, achieving an unparalleled self-cleaning function with surface hardness reaching HRC90 or above.
This versatile Spring Loaded Double Parallel Sliding Gate Valve is engineered for seamless integration with a variety of actuators, including pneumatic actuators, electric actuators, electro-hydraulic actuators, or even manual actuators, offering you unmatched flexibility and reliability in operation.
| Body Type |
AOC-9031 Single Parallel Sliding Gate Valves |
AOC-9032 Double Parallel Sliding Gate Valves |
AOC-9033 Spring Loaded Double Parallel Sliding Gate Valves |
| Actuator Size |
1.1/2''(40A)-36''(900A) |
1.1/2''(40A)-36''(900A) |
1.1/2''(40A)-24''(600A) |
| Plug Size |
1.1/2''(40A)-36''(900A) |
1.1/2''(40A)-36''(900A) |
1.1/2''(40A)-24''(600A) |
| Body Rating |
ANSI 150-300 |
ANSI 150-600 |
ANSI 150-1500 |
| Fluid Temperature |
-20~+250ºC |
-20~+450ºC |
-20~+566ºC |
| Connections |
Flanged(RF, RTJ), Butt Weld, Socket Weld(SW, BW) |
| Body Materials |
A216WCB/C,A217 WC6/9, A351 CF8, A351CF8M,etc |
| Trim Materials |
A105+ENP+PTFE,SUS316+Stellite, etc |
SUS316+Stellite |
| Flow Materials |
ON-OFF |
ON-OFF |
ON-OFF |
| Leakage |
Metal Seat |
ANSI Class V |
ANSI Class V, VHS |
ANSI Class V, VHS |
| Soft Seat |
Our cutting-edge valve features a robust pressure seal bonnet with a high-density pure graphite gasket, ensuring superior sealing capabilities and unparalleled durability.
An advanced overpressure protection device is seamlessly integrated into the bonnet, safeguarding the system against excessive pressure scenarios, thereby enhancing operational safety.
The valve boasts a state-of-the-art spring preloaded flat gate design, offering exceptional performance and reliability in a variety of demanding applications.
Engineered with a relatively wide valve seat and gate, it ensures comprehensive coverage and optimal sealing efficiency.
Equipped with a precision limit device on the support rod, this valve guarantees precise operation and control.
A sophisticated anti-rotation device is installed on the valve stem to maintain stability and prevent unwanted rotation during operation.
To prevent significant wear, the valve features differential hardness on both ends of the sealing surface. With a hardness difference (~5HRC) between the gate (STLG#) and the valve seat (STL12#), it ensures longevity and optimal performance in sealing applications.
The bonnet incorporates an innovative conical sealing design, contributing to enhanced sealing integrity and performance.
Designed for versatility, the valve supports bidirectional flow, offering flexibility and adaptability in various system configurations.
Fitted with two thrust bearings and durable aluminum bronze sleeves, the valve boasts reduced wear and extended lifespan.
An available structure for bypass piping enhances the valve's integration into complex systems, improving overall efficiency.
The spring compensated valve plate assembly is a hallmark of engineering excellence, delivering unmatched reliability and stability.
Featuring a graphite ring pressure self-sealing structure, the valve provides a robust seal that adjusts automatically to pressure changes, enhancing its operational efficacy.
Ingeniously designed, the valve's sealing force intensifies with increasing pressure, ensuring a tight, leak-proof seal under all operational conditions.
For high-temperature or frequently changing temperature conditions, we advocate the use of graphite pressure sealing gaskets. These are superior alternatives to standard soft iron gaskets, ideal for applications involving high temperatures and frequent temperature fluctuations.
Double Parallel Sliding Gate Valves
The innovative Double Parallel Sliding Gate Valves leverage a unique sealing structure with two parallel gates and a wedging device, surpassing the traditional wedge gate valve design. This configuration ensures reliable sealing, even amidst temperature-induced deformations, preventing jamming from high-temperature expansion.
When opened, the valve's sealing disk and seat disengage and rise thanks to the wedge block effect, significantly reducing friction. This results in minimal torque, effortless operation, and extended service life. This design effectively resolves challenges such as the need for large lifting forces, rapid sealing surface wear, poor sealing, and high-temperature jamming, thus significantly enhancing sealing performance and longevity.
SNT Machinery (Qingdao) Co., Ltd. stands as a premier producer of control valves, blending the expertise of manufacturing, innovative design, comprehensive sales, and exceptional service into one cohesive entity. With a high starting point and rapid development trajectory, SNT is strategically nestled in Qingdao, Shandong province. Spanning an impressive 42,000 square meters, our facility is outfitted with state-of-the-art workshops and cutting-edge production equipment. Recognized as a high-tech enterprise, we possess independent intellectual property rights and have embraced both advanced management and production methodologies worldwide. Our dedicated team comprises over 150 skilled professionals, with R&D specialists constituting 15% and 30% holding graduate or higher degrees. Boasting a top-tier production management team and pioneering technology in R&D, we manufacture numerous high-quality valves predominantly utilized in petrochemical, oil, and coal chemical industries. Our achievement includes a remarkable sales value nearing 100 billion in 2017.
Today, SNT holds the prestigious TS Special Equipment Manufacturing Certificate and ISO 9001 certification, alongside the net qualification certificates from major industry leaders such as SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. Our commitment to innovation is reflected in the National Patents we've secured across varied technologies. Our capabilities include designing and manufacturing a comprehensive range of valves, adhering to ANSI, API, DIN, BS, and JIS standards. Leveraging the strengths of renowned global valve brands and our independent research and development, we offer an extensive selection of valves including GLOBE, High Pressure Boiler Blow-down Valves, High-performance Butterfly Valves, Angle-regulating Valves, Eccentric Rotary Valves, T Three-eccentric Center Butterfly Valves, V Ball Valves, High Wear-resistant Ball Valves, High Pressure Steam Valves, Micro-flow Control Valves, Self-operated Control Valves, and Cryogenic Valves.
Our diverse driving mechanisms encompass manual, power-driven, pneumatic, and hydraulic operations. The primary materials we utilize include A216WCB, A217 WC6/WC9, and A351 CF8/CF8M/CF3/CF3M, ensuring durability and excellence. We accommodate specifications ranging from 1/2" to 120", with working pressures from ANSI 150# to 2500#, and operational temperatures from -196ºC to 1100ºC.
Empowered by advanced production technology management and a robust quality assurance system, SNT Valves have found applications across varied sectors including petrochemical, oil, steel & iron, paper manufacturing, and power station industries. Our esteemed clientele includes industry giants such as SINOPEC QILU branch, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi branch, PETROCHINA Ningxia branch, and more, cementing our position as a trusted partner in the industry.
Placing our customers' success at the forefront, we are devoted to establishing an exceptional quality standard and a respected brand. Our impeccable quality assurance and comprehensive after-sales systems ensure that SNT valves stand side by side with our customers, forging paths to shared prosperity.
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