Introducing our innovative Double Parallel Sliding Gate Valve, a superior solution in comparison to the traditional wedge gate valve. This modern marvel boasts a significantly reduced operating torque and a more compact drive size, making it highly efficient and easy to handle. The internal valve plate, ingeniously designed with an INCONEL butterfly spring instead of the conventional coil spring, ensures seamless assembly within the valve body. With a uniquely engineered compensation structure, our valve excels in avoiding jamming, even under high-temperature conditions often caused by adhesion and wedge extrusion. Our valve's surfaces are masterfully hardened, utilizing advanced techniques such as hard alloy overlay welding and surface spraying with Co-Cr-Ni alloy, WC, or boron. This results in an impressive surface hardness reaching up to HRC90 or more, coupled with self-cleaning capabilities. Experience unmatched reliability and performance with our cutting-edge valve technology.
Our versatile spring loaded double parallel sliding gate valve can be effortlessly combined with various types of actuators to meet your specific needs. Whether you require pneumatic actuators, electric actuators, electro-hydraulic actuators, or prefer manual operation, our valve seamlessly integrates with all options, delivering optimal performance and adaptability for diverse applications.
| 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 |
The pressure seal bonnet is crafted with precision, incorporating a high-density pure graphite gasket for exceptional sealing reliability.
To ensure utmost safety, we have integrated an overpressure protection device within the bonnet that provides robust defense against excessive pressure concerns.
Our spring preloaded flat gate valve enhances performance and reliability with its innovative design.
A relatively wide valve seat and gate are included to bolster exceptional sealing capability and longevity.
Equipped with a limit device on the support rod, this feature ensures precise operation and enhances safety during use.
The valve stem includes an anti-rotation device, ensuring stable and reliable performance throughout its lifecycle.
For superior durability, our product differentiates hardness on both ends of the sealing surface, mitigating wear significantly. The sealing surface features a hardness difference of approximately 5HRC, with the gate made from STLG# and the valve seat crafted from STL12#.
The bonnet's sealing adopts a conical design, enhancing its sealing effectiveness across varying pressure conditions.
Engineered for versatility, these valves provide bidirectional flow capabilities.
Equipped with two thrust bearings and aluminum bronze sleeves, ensuring smooth and efficient operation under demanding conditions.
A thoughtfully designed structure is available for bypass piping, accommodating varied installation needs.
The spring compensated valve plate assembly ensures continued performance and reliability in diverse conditions.
Our graphite ring pressure self-sealing structure adapts to varying pressure environments, ensuring uncompromised sealing integrity.
Experience elevated sealing force as pressure increases, providing enhanced performance and security.
For applications exposed to high temperatures or frequent temperature variations, we highly recommend using graphite pressure sealing gaskets. These gaskets are superior alternatives to standard soft iron gaskets, tailored for high-temperature and frequent temperature cycle conditions.
Double Parallel Sliding Gate Valves
Our Double Parallel Sliding Gate Valves embrace a cutting-edge sealing structure with two parallel gates and a wedging device, replacing outdated wedge gate valve designs. The distinct sealing mechanism components ensure optimal sealing even under temperature-induced deformation, eliminating high-temperature expansion jamming.
Upon opening, the sealing disk and valve seat disengage and rise due to the wedge block effect. This significantly reduces friction between sealing surfaces, resulting in minimal torque, effortless operation, and prolonged service life. Our innovative design overcomes challenges such as excessive lifting force for single gate start, sealing surface wear, poor sealing, short lifespan, and high-temperature operational jamming, thereby enhancing sealing performance and extending the valve's service life.
SNT Machinery (Qingdao) Co., Ltd is an industry leader in the production of superior control valves, seamlessly combining manufacturing, design innovation, sales, and exceptional service under one roof. Our company has made rapid strides, thanks to a strong foundation and a visionary approach. Nestled in the bustling city of Qingdao, in Shandong province, our state-of-the-art facility spans a sprawling 42,000 square meters, featuring cutting-edge workshops and advanced production equipment. As a high-tech enterprise, we pride ourselves on owning independent intellectual property rights and integrating world-class management and production expertise. With a dedicated team of over 150 employees, 15% of whom are seasoned R&D specialists, and 30% holding graduate or higher degrees, we are a powerhouse of innovation and quality. Our relentless pursuit of excellence in production management and technology development results in the mass production of premium valves, pivotal in petrochemical, oil, and coal chemical industries, achieving a remarkable sales turnover approaching 100 billion in 2017.
SNT proudly holds the TS special equipment manufacturing certification and ISO 9001 accreditation. We've earned the coveted net qualification certificates from industry giants such as SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. Our pioneering technologies have been recognized with numerous National Patents. We are capable of designing and manufacturing a comprehensive range of valves adhering to ANSI, API, DIN, BS, and JIS standards. Our innovative approach amalgamates the strengths of world-renowned valve designs with our proprietary R&D prowess. Presently, we produce a wide spectrum of valve types, including GLOBE Valves, High Pressure Boiler Blow-down Valves, High-performance Butterfly Valves, Angle-regulating Valves, Eccentric Rotary Valves, and T Three-eccentric Center Butterfly Valves, among others.
Our extensive catalog further extends to V Ball Valves, High Wear-resistant Ball Valves, High Pressure Steam Valves, Micro-flow Control Valves, Self-operated Control Valves, and Cryogenic Valves, among others. We offer various driving forms such as manual operation, electric power-driven, pneumatic, and hydraulic drives. We meticulously select materials for the main parts, including A216WCB, A217 WC6/WC9, A351 CF8/CF8M/CF3/CF3M, ensuring unmatched durability and performance. Our specifications range from 1/2" to 120", accommodating working pressures from ANSI 150# to 2500#, and enduring working temperatures from -196ºC to 1100ºC.
Leveraging our pioneering production techniques and stringent quality assurance systems, SNT Valves have become indispensable across diverse industries such as petrochemical, oil, steel & iron, paper manufacturing, and power stations. We are honored to serve an esteemed clientele, including the SINOPEC QILU and Qingdao branches, CNOOC Huizhou Refinery, PETROCHINA's Guangxi and Ningxia branches, and SINOPEC's Changling and Jinan branches, among others.
Our commitment to maximizing user profitability is unwavering, as we dedicate ourselves to building a brand synonymous with excellence and superior quality. Our robust quality assurance and unparalleled after-sales service systems ensure that SNT valves forge prosperous partnerships with all our esteemed customers, driving mutual success and growth.
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