Dive into the world of innovation with our Advanced Spring Loaded Double Parallel Sliding Gate Valves with Pneumatic Actuation! Compared to traditional wedge gate valves, our cutting-edge design boasts an impressively reduced operating torque and compact drive size. At the heart of this engineering marvel lies an INCONEL butterfly spring, replacing the conventional coil spring, which streamlines assembly within the valve body. Our especially crafted compensation structure ingeniously prevents jamming, even under high-temperature conditions, effectively mitigating issues from adhesion and wedge extrusion. The valve plate and seat surfaces are fortified with hardening techniques such as hard alloy overlay welding, and surface spraying with Co-Cr-Ni alloy, WC, boron, etc., ensuring a self-cleaning functionality with surface hardness reaching an extraordinary HRC90 or above, promising longevity and peak performance.
The versatility of our spring loaded double parallel sliding gate valves shines through as they seamlessly integrate with pneumatic actuators, electric actuators, electro-hydraulic actuators, or manual actuators, offering unmatched adaptability to meet diverse operational needs.
| 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 sophisticated pressure seal bonnet is harmoniously crafted with a high-density pure graphite gasket, ensuring unparalleled sealing efficiency and durability.
An innovative overpressure protection device is ingeniously incorporated into the bonnet, safeguarding the system from excessive pressure and ensuring reliable performance under varying conditions.
Cutting-edge spring preloaded flat gate valve designed for optimal functionality and efficiency.
Features a robust, relatively wide valve seat and gate, enhancing operational stability and sealing effectiveness.
A meticulously engineered limit device on the support rod guarantees precision in motion control.
A sophisticated anti-rotation device on the valve stem for stability and precise alignment.
The sealing surface is ingeniously designed with different hardness levels on both ends, preventing significant wear. With a strategic hardness difference (~5HRC): gate - STLG#, valve seat - STL12#, it ensures longevity and reliability.
Our bonnet sealing features a masterfully designed conical shape, optimizing sealing efficiency.
Allows seamless bidirectional flow, offering versatility and enhanced performance in diverse applications.
Equipped with two thrust bearings and aluminum bronze sleeves, delivering smooth operation and extended service life.
Flexibility in design with an available structure for bypass piping, catering to varied system requirements.
Ingenious Spring Compensated Valve Plate Assembly for superior sealing and functionality.
Employs a graphite ring pressure self-sealing structure, ensuring high efficiency and reliability under dynamic pressures.
Ingenious design feature: the higher the pressure, the greater the sealing force, ensuring airtight performance under intense conditions.
For high-temperature or frequently changing temperature conditions, we highly recommend our advanced graphite pressure sealing gaskets. These are ideal replacements for standard soft iron gaskets, especially in high-temperature and frequent temperature cycle applications, ensuring superior performance and reliability.
State-of-the-Art Double Parallel Sliding Gate Valves
Our Double Parallel Sliding Gate Valves revolutionize conventional designs with a sealing structure of two parallel gates and a wedging device. This innovative configuration replaces the traditional wedge gate valve structure. By having separate sealing mechanism components, it ensures a steadfast seal even under temperature-induced deformations without the risk of jamming due to high-temperature expansion.
When the valve opens, the sealing disk and valve seat disengage elegantly and rise due to the wedge block effect, which significantly reduces friction between sealing surfaces. This results in minimal torque, effortless operation, and prolonged service life. Our design effectively tackles issues like the large lifting force required for single gate start, easy sealing surface wear, poor sealing, short service life, and high-temperature opening and closing jamming, thereby substantially elevating the valve's sealing performance and extending its lifespan.
SNT Machinery (Qingdao) Co., Ltd. is a renowned producer of control valves, strategically integrating manufacturing, design, sales, and services into a seamless operation. Established with a dynamic vision for rapid growth, SNT is nestled in the picturesque city of Qingdao, Shandong Province, spanning a comprehensive area of 42,000 square meters. Our state-of-the-art facilities boast a modern workshop outfitted with cutting-edge production equipment. As a high-tech enterprise, we pride ourselves on holding independent intellectual property rights and leveraging advanced management and production expertise from global pioneers. With a dedicated team of over 150 employees, 15% of whom are R&D specialists and 30% holding graduate or higher degrees, our strength lies in superior production management and innovative R&D. SNT's high-quality valves serve the petrochemical, oil, and coal chemical sectors on a large scale, achieving a sales value nearing 100 billion in 2017.
SNT proudly holds the TS special equipment manufacturing certificate and ISO 9001 accreditation. We have earned net qualification certificates from SINOPEC, CNOOC, PETROCHINA, and SINOCHEM, and have secured numerous national patents for our technological advancements. Our expertise enables us to design and manufacture a comprehensive range of valves, adhering to ANSI, API, DIN, BS, and JIS standards. By synthesizing global valve excellence with our own innovative research, we offer an array of valves including Globe Valves, High Pressure Boiler Blow-down Valves, High-performance Butterfly Valves, Angle-regulating Valves, Eccentric Rotary Valves, and Three-eccentric Center Butterfly Valves.
Our extensive valve offerings also encompass V Ball Valves, High Wear-resistant Ball Valves, High Pressure Steam Valves, Micro-flow Control Valves, Self-operated Control Valves, and Cryogenic Valves, with various driving mechanisms such as manual, power-driven, pneumatic, and hydraulic. Main components are crafted from premier materials like A216WCB, A217 WC6/WC9, A351 CF8/CF8M/CF3/CF3M, covering specifications from 1/2" to 120", withstanding pressures from ANSI 150# to 2500#, and performing reliably across temperatures from -196ºC to 1100ºC.
Leveraging our sophisticated production technology and robust quality assurance systems, SNT Valves are extensively employed across petrochemical, oil, steel & iron, paper manufacturing, and power station industries. Our esteemed clientele includes industry giants like SINOPEC QILU branch, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi branch, PETROCHINA Ningxia branch, among others, who trust in our unwavering commitment to excellence.
At SNT, customer profitability is our ultimate priority. We dedicate ourselves to crafting unparalleled quality and fostering a reputable brand. Our comprehensive quality assurance and after-sales services ensure that SNT Valves form enduring partnerships with our clients, steering a course towards shared prosperity and success.
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