Introducing the API/SIL Standard Spring Loaded Double Parallel Sliding Gate Valves by SNT Machinery (Qingdao) Co., Ltd., engineered with precision for superior performance. This innovative valve boasts a reduced operating torque and smaller drive size compared to conventional wedge gate valves. It features an advanced INCONEL butterfly spring in place of the traditional coil spring, ensuring ease of assembly within the valve body. The valve's unique compensation structure is meticulously designed to eliminate jamming issues often caused by high temperatures, adhesion, and wedge extrusion. With a focus on longevity and efficiency, the valve plate and seat surfaces undergo hardening processes, such as hard alloy overlay welding and surface spraying with Co-Cr-Ni alloy, WC, and boron. These treatments deliver an exceptional self-cleaning capability, achieving remarkable surface hardness levels of HRC90 or higher, ensuring durability and optimal performance.
The versatile spring loaded double parallel sliding gate valve is compatible with a range of actuators, offering seamless integration with pneumatic, electric, electro-hydraulic, or manual actuators. This adaptability ensures that our valves meet diverse operational needs and provide reliable, precise control in various 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 |
Experience enhanced durability and reliability with our Pressure Seal Bonnet, featuring an advanced high-density pure graphite gasket for superior sealing performance.
Our innovative overpressure protection device is ingeniously integrated into the bonnet, safeguarding your system from excessive pressure challenges with precision.
Elevate your operations with our Spring Preloaded Flat Gate Valve, engineered for unmatched efficiency and performance.
Benefit from the stability of a Relatively Wide Valve Seat and Gate, designed to ensure secure and reliable operation.
Enhance safety and precision with the strategically placed Limit Device on the support rod, providing control and reliability.
Our Anti-Rotation Device on the valve stem ensures stability and prevents unwarranted movement, maintaining optimal operational integrity.
Designed for longevity, the Sealing Surface features variable hardness on both ends to prevent wear. The gate boasts a hardness level of STLG#, while the valve seat is STL12#, providing a difference of ~5HRC for robust protection.
Experience superior sealing with the Bonnet's Conical Design, crafted to enhance sealing efficacy and durability.
Achieve flexibility and efficiency with our Bidirectional Flow capability, allowing seamless flow management in both directions.
Our design incorporates Two Thrust Bearings and Aluminum Bronze Sleeves, enhancing the valve's performance and longevity by reducing friction.
A thoughtfully designed structure for Bypass Piping is available, providing added versatility and convenience for diverse applications.
Spring Compensated Valve Plate Assembly ensures precise operation and long-lasting performance under diverse conditions.
Our Graphite Ring Pressure Self-Sealing Structure adapts dynamically to pressure changes, ensuring consistent sealing force.
Witness a revolutionary design where the Sealing Force increases in tandem with pressure, ensuring impeccable sealing efficiency irrespective of conditions.
For high-temperature or frequently changing temperature scenarios, our recommendation is to utilize Graphite Pressure Sealing Gaskets. These gaskets provide superior performance and replace standard soft iron gaskets, offering optimal functionality in high-temperature and frequent temperature cycle situations.
Double Parallel Sliding Gate Valves
The Double Parallel Sliding Gate Valves are ingeniously designed with a unique sealing mechanism. Featuring two parallel gates and a wedging device, this design surpasses the traditional wedge gate valve structure. By separating sealing mechanism components, it ensures reliable sealing even under temperature-induced deformation, eliminating the risk of jamming caused by thermal expansion.
With an innovative design, when the valve opens, the sealing disk and valve seat disengage before rising due to the wedge block effect. This dramatically reduces friction between sealing surfaces, resulting in minimal torque, effortless operation, and extended service life. It addresses challenges such as the high lifting force for single gate start, easy sealing surface wear, poor sealing, short service life, and jamming during high-temperature operations, significantly enhancing sealing performance and durability.
SNT Machinery (Qingdao) Co., Ltd. stands as a distinguished producer of premium control valves, brilliantly integrating manufacturing, design, sales, and service into a seamless entity. With a strategic high starting point for rapid development, SNT is ideally located in the thriving city of Qingdao, Shandong province, encompassing a vast area of 42,000 square meters. Our state-of-the-art workshops and cutting-edge production equipment position us as a high-tech enterprise possessing independent intellectual property rights, enriched by globally sourced advanced management and production expertise. Our dynamic team boasts over 150 dedicated professionals, with 15% specializing in innovative R&D. Impressively, 30% of our workforce are esteemed graduates or hold higher academic qualifications. Fueled by a strong commitment to quality production management and pioneering technological advancements, we consistently deliver substantial volumes of superior valves, prominently serving the petrochemical, oil, and coal chemical sectors. Highlighting our success, we proudly achieved a sales value approaching 100 billion in 2017.
Currently, SNT has proudly attained the prestigious TS special equipment manufacturing certificate and ISO 9001 accreditation. Moreover, we have secured the net qualification certification from industry giants such as SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. Our innovative prowess is further evidenced by multiple national patents covering a spectrum of proprietary technologies. Expertly designing and manufacturing an extensive range of valves in adherence with ANSI, API, DIN, BS, and JIS standards, our offerings seamlessly blend the strengths of renowned global valve designs with our own independent research and development. Our current production capabilities encompass a diverse array 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.
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. Available driving forms encompass manual operation, power-driven, pneumatic, and hydraulic options. Material selections for principal components include A216 WCB, A217 WC6/WC9, A351 CF8/CF8M/CF3/CF3M, among others. Our specifications span 1/2" to 120", accommodating working pressures from ANSI 150# to 2500#, with operational temperatures ranging from -196ºC to 1100ºC.
Leveraging advanced production technology management and a robust quality assurance system, SNT Valves have become an integral component across diverse industries, including petrochemical, oil, steel & iron, paper manufacturing, and power stations. Our esteemed clientele features industry leaders such as SINOPEC QILU branch, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi branch, PETROCHINA Ningxia branch, among others. Notably, our products are also utilized by the SINOPEC Changling branch, Jinan branch, and an array of other prominent enterprises.
We place the prosperity of our users at the forefront of our mission, dedicating ourselves to fostering unparalleled quality and a reputable brand. Our comprehensive quality assurance and after-sales systems ensure that SNT valves forge enduring partnerships with clients, paving the way for shared success and mutual prosperity.
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