Our cutting-edge spring-loaded double parallel sliding gate valve is an engineering marvel that stands out when compared to the traditional wedge gate valve. This innovative design boasts a significantly reduced operating torque and a more compact drive size, making it a perfect choice for efficiency and space-saving needs. Inside the valve, an advanced INCONEL butterfly spring has been ingeniously integrated, replacing the traditional coil spring, which simplifies the assembly process within the valve body. With its unique compensation structure, the design expertly prevents jamming from high-temperature conditions caused by adhesion and wedge extrusion. To top it off, the valve plate and seat surfaces are meticulously hardened with state-of-the-art techniques such as hard alloy overlay welding, surface spraying of Co-Cr-Ni alloy, WC, and boron. These enhancements ensure magnificent self-cleaning abilities with an impressive surface hardness that reaches HRC90 or beyond, promising exceptional durability and performance.
This versatile spring-loaded double parallel sliding gate valve is compatible with a variety of actuators, allowing it to adapt seamlessly to different operation needs. Whether paired with pneumatic actuators for precision control, electric actuators for smooth automation, electro-hydraulic actuators for powerful performance, or manual actuators for simplicity and cost-effectiveness, this valve delivers outstanding flexibility and reliability.
| 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 |
Crafted with precision, our valve boasts a pressure seal bonnet, enhanced with a high-density pure graphite gasket for superior sealing.
An advanced overpressure protection device is masterfully integrated into the bonnet, safeguarding against undue pressure surges.
Ingenious design highlights a spring preloaded flat gate valve for optimized performance.
Engineered with a wide valve seat and gate to ensure uncompromised flow and reliability.
A robust limit device is strategically placed on the support rod for controlled valve operation.
Features an anti-rotation device meticulously installed on the valve stem to maintain alignment.
To combat significant wear, the sealing surface boasts differing hardness levels. This careful balance of hardness (~5HRC) features gate - STLG#, valve seat - STL12#, ensuring durability and efficacy.
The bonnet's conical design is precision-engineered to enhance sealing capabilities.
Designed for bidirectional flow, our valves accommodate versatile operational needs.
Equipped with dual thrust bearings and resilient aluminum bronze sleeves for smooth operation.
Offers a versatile bypass piping structure to elevate performance and adaptability.
Spring Compensated Valve Plate Assembly ensures consistent performance under varied conditions.
Innovative graphite ring pressure self-sealing structure for enhanced sealing integrity.
Remarkable design principle: The higher the pressure, the greater the sealing force, ensuring reliability.
For high-temperature or rapidly fluctuating temperature environments, we advocate the use of graphite pressure sealing gaskets over standard soft iron, ensuring durability and resilience in demanding applications.
Double Parallel Sliding Gate Valves
Our Double Parallel Sliding Gate Valves introduce a groundbreaking sealing architecture with two parallel gates and a wedging device, effectively replacing the conventional wedge gate valve design. This ensures steadfast sealing, accommodating deformation from temperature variations without jamming, even in high-temperature expansions.
Upon opening, the valve's innovative design causes the sealing disk and valve seat to disengage effortlessly before ascending, thanks to the wedge block effect. This significantly reduces friction, allowing for minimal torque, ease of operation, and an extended service life. This design innovation tackles challenges like high lifting force for single gate starts, sealing surface wear, poor sealing efficacy, short service lifespan, and high-temperature jamming, enhancing both sealing performance and longevity.
SNT Machinery (Qingdao) Co., Ltd. stands at the forefront of the valve manufacturing industry, seamlessly integrating design, production, sales, and services. Located in the bustling city of Qingdao, Shandong, and sprawling over an expansive 42,000 square meters, our modern facility is equipped with state-of-the-art machinery. As a high-tech enterprise, we boast independent intellectual property rights and have infused our operations with advanced management techniques from global leaders. Our dynamic workforce of over 150 includes a remarkable 15% dedicated to research and development, and an impressive 30% hold graduate or higher degrees. Our commitment to quality and innovation propels our production of premium valves extensively utilized in the petrochemical, oil, and coal industries, boasting a remarkable sales value approaching 100 billion in 2017.
SNT has achieved distinguished certifications, including the TS special equipment manufacturing certificate and ISO 9001, alongside net qualification recognition from industry giants like SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. We are proud holders of numerous National Patents, empowering us to design and produce valves adhering to ANSI, API, DIN, BS, and JIS standards. By synthesizing the best global valve technologies and fostering independent research, we manufacture a comprehensive range of valves, including GLOBE, High-Pressure Boiler Blow-down Valves, High-performance Butterfly Valves, Angle-regulating Valves, and Eccentric Rotary Valves.
Our extensive product lineup features T Three-eccentric Center Butterfly Valves, V Ball Valves, High Wear-resistant Ball Valves, High Pressure Steam Valves, and more. With drive options ranging from manual to power-driven, pneumatic, and hydraulic, our valves cater to diverse needs. We utilize premium materials like A216WCB, A217 WC6/WC9, and A351 CF8/CF8M/CF3/CF3M, covering specifications from 1/2" to 120", pressures from ANSI 150# to 2500#, and temperatures from -196ºC to 1100ºC.
Harnessing cutting-edge production technology and a robust quality assurance system, SNT valves have penetrated markets across industries such as petrochemical, oil, steel & iron, paper manufacturing, and power stations. Our esteemed clientele includes heavyweights like the SINOPEC QILU and Qingdao branches, CNOOC Huizhou Refinery, PETROCHINA Guangxi and Ningxia branches, and SINOPEC Changling and Jinan branches.
At SNT, we prioritize our users' profitability, steadfast in our mission to cultivate superior quality and a revered brand. Our impeccable quality assurance and comprehensive after-sales services ensure that SNT valves form enduring partnerships with our customers, paving the way for mutual growth and success.
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