Experience the pinnacle of modern engineering with SNT Machinery's cutting-edge API/SIL Compliant Spring Loaded Double Parallel Sliding Gate Valves. Compared to traditional wedge gate valves, our state-of-the-art design boasts significantly reduced operating torque and a more compact drive size, ensuring efficiency and reliability. The revolutionary internal valve plate design features an innovative INCONEL butterfly spring, replacing the conventional coil spring, which simplifies assembly within the valve body. Its unique compensation structure ingeniously mitigates jamming issues caused by high temperatures, preventing complications from adhesion and wedge extrusion. Our valve plate and seat surfaces are fortified with robust hardening techniques, including hard alloy overlay welding, and surface spraying of Co-Cr-Ni alloy, WC, and boron, achieving an impressive surface hardness of HRC90 or higher. This remarkable feature not only enhances durability but also provides exceptional self-cleaning capabilities, ensuring optimal performance in the most demanding environments.
Unleash the versatility of the spring loaded double parallel sliding gate valve, perfectly adaptable for seamless integration with a variety of actuator types. Whether you require pneumatic actuators, electric actuators, electro-hydraulic actuators, or manual operation, our valve offers unparalleled flexibility to meet your specific operational needs. Experience unmatched performance and customization with SNT Machinery's expertly engineered solutions.
| 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 valves feature a pressure seal bonnet, expertly crafted with a high-density pure graphite gasket, ensuring top-notch sealing efficiency and reliability.
To safeguard against excessive pressure, an innovative overpressure protection device is seamlessly integrated into the bonnet.
Designed with precision, the spring preloaded flat gate valve ensures optimal performance and durability in demanding environments.
The valve boasts a relatively wide seat and gate, providing enhanced sealing and operational stability.
Equipped with a limit device on the support rod, our valve guarantees precise control and functional integrity.
An anti-rotation device on the valve stem enhances operational reliability by preventing unwanted movement.
The sealing surface features varied hardness on both ends to minimize wear: gate - STLG#, valve seat - STL12#, ensuring longevity and resilience.
Ingeniously designed with a conical sealing feature on the bonnet, our valves offer superior sealing performance.
Engineered for versatility, the valve supports bidirectional flow for diverse application needs.
Incorporating two thrust bearings and aluminum bronze sleeves, the design ensures smooth operation and extended lifespan.
An available structure for bypass piping enhances flexibility and functionality in complex systems.
Spring Compensated Valve Plate Assembly, meticulously designed for efficiency and reliability under varying conditions.
Built with a graphite ring pressure self-sealing structure, these valves optimize sealing power in fluctuating pressure environments.
Experience unparalleled sealing force: the higher the pressure, the greater the sealing force is applied, ensuring unmatched security.
For high-temperature or variable temperature conditions, opt for graphite pressure sealing gaskets over standard soft iron ones to ensure durability and performance during extreme heat and frequent temperature cycles.
Double Parallel Sliding Gate Valves
Our Double Parallel Sliding Gate Valves revolutionize traditional valve technology with a cutting-edge sealing structure. Featuring two parallel gates and a wedging device, they ensure uncompromised sealing even amidst thermal deformation, eliminating the risk of jamming due to high-temperature expansion.
When the valve opens, the sealing disk and valve seat disengage efficiently, minimizing friction through the wedge block effect. This design reduces torque, facilitates easy operation, and extends service life. It addresses challenges like high start-up force, surface wear, and poor sealing under extreme temperatures, significantly enhancing sealing performance and valve longevity.
SNT Machinery (Qingdao) Co., Ltd. stands as a distinguished producer of premium control valves, seamlessly integrating manufacturing, design, sales, and exceptional services under one roof. This illustrious company, with its forward-thinking foundation and rapid development, is situated in the vibrant city of Qingdao, within Shandong province, covering an expansive area of 42,000 square meters. Boasting state-of-the-art workshops and cutting-edge production equipment, SNT is recognized as a high-tech enterprise endowed with independent intellectual property rights and enriched by imported advanced management and production expertise. With a dynamic team of over 150 dedicated professionals, where R&D specialists constitute 15% and 30% are graduates with higher education, SNT is committed to excellence. Leveraging a high-caliber production management team and pioneering technology in research and development, the company produces an impressive range of high-quality valves extensively utilized in petrochemical, oil, and coal chemical industries. Remarkably, SNT achieved a sales value approaching 100 billion in 2017, signifying its resounding success.
SNT has proudly attained the TS special equipment manufacturing certificate alongside the prestigious ISO 9001 certification. Furthermore, SNT has earned the esteemed net qualification certificate from industry giants such as SINOPEC, CNOOC, PETROCHINA, and SINOCHEM, showcasing its industry leadership. The company also holds numerous National Patents in various innovative technologies, showcasing its commitment to pioneering advancements. Capable of designing and manufacturing a comprehensive array of valves in adherence to ANSI, API, DIN, BS, and JIS standards, SNT artfully combines the merits of world-renowned valves with its own innovative research and development. As a result, SNT can expertly manufacture a wide variety of valves, including GLOBE, High Pressure Boiler Blow-down Valves, High-performance Butterfly Valves, Angle-regulating Valves, and Eccentric Rotary Valves, among others.
SNT proudly presents an extensive selection of valves, such as 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, Cryogenic Valves, and more. SNT offers versatile driving forms, encompassing manual, power-driven, pneumatic, and hydraulic operations, catering to a myriad of industry needs. The main components are crafted from superior materials like A216WCB, A217 WC6/WC9, A351 CF8/CF8M/CF3/CF3M, ensuring durability and reliability. The specifications range from 1/2" to 120", supporting working pressures of ANSI 150# to 2500#, and operating efficiently in temperatures spanning -196ºC to 1100ºC.
Empowered by superior production technology management and a comprehensive quality assurance system, SNT valves have found extensive application across diverse industries, including petrochemical, oil, steel & iron, paper manufacturing, and power stations. Esteemed clients such as SINOPEC QILU branch, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi branch, PETROCHINA Ningxia branch, SINOPEC Qingdao Refinery, and many more, have placed their trust in SNT's unparalleled quality and performance.
With a steadfast commitment to prioritizing user profits, SNT dedicates itself to establishing an exceptional quality and reputable brand. Our impeccable quality assurance and after-sales systems ensure that SNT valves partner with all our customers, paving the way for shared prosperity and success.
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