Basic Info.
Temperature
Ordinary Temperature
Certification
GS, RoHS, CE, ISO9001
Media
Gas, Oil, Water, Acid
Connections
Butt Welding/Flange
Valve Body Materials
A216 Wcb/A351 CF8/CF3/CF8m/CF3m/Zg230-450
Body Materials
Zg0cr18ni9ti/Zg0cr18ni12mo2ti
Spool Materials
304ss/316ss/304lss/316lss/1Cr18Ni9/0cr18ni12mo2t
Valve Seat Materials
304ss/316ss/304lss/316lss/1Cr18Ni9/0cr18ni12mo2ti
Stem Materials
304ss/316ss/304lss/316lss/1Cr18Ni9/1Cr18Ni9
Rubber Diaphragm Materials
Nitrile/Ethylene/Fluoro/Oil Resistant Rubbe
Membrane Cover Materials
Q235/Q235/Painting PTFE
Packing Materials
Polytetrafluoroethylene/Flexible Graphite
Flow Characteristic
Come on
Service Temperature
-60~350degree
Allowable Leakage
Class IV for Hard Seal/ Class VI for Soft Seal
Flange Standard
GB/T9113-2000jb/T79.1-94/Jb/T79.2-94/Hg20592~Hg
Flange Sealing Surface Type
Pn16 for Convex Flange/Pn25 for Convex Flangepn40
Flange End Distance Standard
GB12221-89
Transport Package
Wooden Box and Cardboard Box.
Product Description
Product Description
Introducing the AOC-3000, a remarkable self-operated pressure regulating valve from SNT Machinery (Qingdao) Co., Ltd., designed with the utmost innovation for advanced control valve systems. This intelligent executive product leverages the energy of the regulated medium itself, eliminating the need for any external power source, thus offering a sustainable solution for energy conservation. The standout feature of the AOC-3000 is its adaptability to environments lacking electricity or gas, making it indispensable in energy-conscious operations. With a flexible pressure setting range, it caters to diverse application needs seamlessly. Tailored to meet various process requirements, the AOC-3000 is available in three distinct valve configurations: the AOC-3111 single-seated, the AOC-3113 sleeve, and the AOC-3114 double-seated self-acting pressure regulating valves. Each variant is crafted for optimal performance based on specific working conditions like differential pressure, temperature, medium state, and leakage demands. Users have the liberty to select the perfect fit for their unique operational challenges. Moreover, the AOC-3000 offers three sophisticated actuator types: diaphragm (standard and reinforced), piston, and metal diaphragm (bellows), designed to accommodate various process scenarios. Boasting fast-opening flow characteristics, this valve ensures precise control with an adjustment accuracy of error ≤10%. The compact design takes up minimal space compared to traditional heavy hammer-type pressure reducing valves, making it easy to install and adjust. This versatility and precision make the AOC-3000 a preferred choice across industries including petroleum, chemical, electric power, metallurgy, food, light textile, and machinery manufacturing. It excels in tasks such as gas, liquid, and steam pressure reduction and stabilization, both post- and pre-valve adjustments, ensuring reliable pressure management across a multitude of applications. Actuator Features
Figure 1a illustrates an innovative approach to regulating post-control valve pressure with precision. This pressure-closed valve system operates by allowing the medium to gracefully flow into the valve body, as directed by the arrow, and then be dispensed through the valve seat and spool with finesse. The alternative route, via the pressure tube - particularly when dealing with steam plus a condenser - introduces the medium into the actuator, engaging the diaphragm. As a result, the spool adjusts its position to seamlessly achieve pressure reduction and stabilization. When the downstream pressure rises, the diaphragm's force intensifies, compressing the spring and driving the spool to decrease the valve opening until equilibrium is restored to the predetermined setting. Conversely, should the downstream pressure drop, the diaphragm's force diminishes, allowing the spring's responsive force to guide the spool, increasing the valve opening until the set pressure level is reinstated.
Figure 1b showcases a sophisticated pressure regulation mechanism focused on controlling the pressure ahead of the valve, characterized by a pressure-open action mode. The medium enters the valve body in the direction indicated by the arrow, subsequently facilitated through the valve seat and spool after throttling. An alternative path via the pressure tube - particularly applicable when employing steam plus a condenser - channels the medium to the actuator, engaging the diaphragm. This engagement prompts the spool to adjust its position, achieving the dual objectives of pressure relief and stabilization. Should the upstream pressure rise, the force on the diaphragm escalates, compressing the spring and prompting the spool to increase the valve opening until equilibrium is achieved at the set pressure level. Conversely, if the upstream pressure declines, the force on the diaphragm lessens, allowing the spring's reactive force to guide the spool in reducing the valve opening until the set pressure level is recovered. Remarkably, if the upstream pressure falls below the set threshold, the valve remains steadfastly closed. Product Parameters
| nominal diameter DN(mm) | 20 | 25 | 32 | 40 | 50 | 65 | 80 | 100 | 125 | 150 | 200 | 250 | 300 |
| rated flow coefficient KV | 5.8 | 11 | 12.5 | 20 | 32 | 50 | 80 | 125 | 160 | 320 | 450 | 630 | 900 |
rated stroke
(mm) | 8 | 10 | 12 | 15 | 18 | 20 | 30 | 40 | 45 | 60 | 65 |
| nominal diameter DN(mm) | 20 (or G3/4'') |
| Valve seat diameter | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 12 | 15 | 20 |
| rated flow coefficient KV | 0.02 | 0.08 | 0.12 | 0.20 | 0.32 | 0.5 | 0.80 | 1.20 | 1.80 | 2.80 | 4.0 | 5.8 |
| nominal pressure PN | Mpa | 1.6, 2.5, 4.0,6.4(6.3) /2.0, 5.0, 11.0 |
| Bar | 16, 25, 40, 64(63)/20, 50, 110 |
| Lb | ANSI: Class150,Class300,Class600 |
| pressure segment range KPa | 15~50,40~80,60~100,80~140,120~180,160~220,200~260,
240~300,280~350,330~400,380~450,430~500,480~560,
540~620,600~700,680~800,780~900,880~1000,900~1200,
1000~1500,1200~1600,1300~1800,1500~2100,
(Other Scope Special Design) |
| flow characteristic | Come on. |
| regulation accuracy | ±5-10(%) |
| service temperature | -60~350ºC (Special design below -60ºC) 350~550ºC |
| allowable leakage | Class IV (hard seal) Class VI (soft seal)(GB/T4213-08) |
| (/decompression ratio (Inlet pressure/Outlet pressure) | 1.25~10( special design beyond this range) |
Product Dimensions
| Nominal diameter(DN) | 20 | 25 | 32 | 40 | 50 | 65 | 80 | 100 | 125 | 150 | 200 | 250 | 300 |
| Length of the receiver tube (B) | 383 | 512 | 603 | 862 | 1023 | 1380 | 1800 | 2000 | 2200 |
| Flange face distance L(PN16,25,40) | 150 | 160 | 180 | 200 | 230 | 290 | 310 | 350 | 400 | 480 | 600 | 730 | 850 |
| Flange face distance L(PN64) | 230 | 260 | 300 | 340 | 380 | 430 | 500 | 550 | 650 | 775 | 900 |
Pressure adjustment range
KPa | 15~140 | H | 475 | 520 | 540 | 710 | 780 | 840 | 880 | 940 | 950 |
| A | 280 | 308 |
| 120~300 | H | 455 | 500 | 520 | 690 | 760 | 800 | 870 | 900 | 950 |
| A | 230 |
| 280~500 | H | 450 | 490 | 510 | 680 | 750 | 790 | 860 | 890 | 940 |
| A | 176 | 194 | 280 |
| 480~1000 | H | 445 | 480 | 670 | 740 | 780 | 780 | 850 | 880 | 930 |
| A | 176 | 194 | 280 |
(Kg)
PN16Weight (Kg)
PN16 as an example | 26 | 37 | 42 | 72 | 90 | 112 | 130 | 169 | 285 | 495 | 675 |
Mounting Method
For gas or low viscosity liquid environments, the AOC-3111 Self-Operated Pressure Regulating Valve is optimally installed in an upright position on a horizontal pipe. Should spatial constraints be present, it may be mounted upside down or diagonally. If the medium is verified to be clean, the installation of part 3 can be optionally omitted for enhanced convenience.
In cases where the valve is employed for steam or high viscosity liquid media, it is standard practice to install the AOC-3111 Self-Operated Pressure Regulating Valve upside down on a horizontal pipe. This orientation ensures superior performance and efficiency.
Production application
Company Profile
SNT Machinery (Qingdao) Co., Ltd. stands proudly at the forefront of innovative control valve manufacturing. Seamlessly integrating design, production, sales, and services, we are strategically located in the vibrant city of Qingdao, Shandong province. With an expansive facility covering 42,000m², we boast state-of-the-art workshops and advanced production machinery. As a distinguished high-tech enterprise, we hold independent intellectual property rights and incorporate the industry's leading management and production expertise. Our dynamic team is comprised of over 150 dedicated professionals, with a robust 15% specializing in R&D, and 30% holding graduate or higher degrees. This exemplary team drives our production of premium quality valves, extensively employed in petrochemical, oil, and coal chemical industries. We achieved an impressive sales milestone of nearly 100 billion in 2017, a testament to our commitment to excellence and innovation.
SNT proudly holds the prestigious TS Special Equipment Manufacturing Certificate and ISO 9001 certification, along with vital net qualification endorsements from SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. Our cutting-edge technologies have earned us numerous national patents. We excel in designing and producing a complete range of valves adhering to ANSI, API, DIN, BS, and JIS standards. By harmonizing the strengths of world-renowned valves with our proprietary research and development, we craft an extensive array of valves, including GLOBE, High Pressure Boiler Blow-down Valves, High-performance Butterfly Valves, Angle-regulating Valves, Eccentric Rotary Valves, and T Three-eccentric Center Butterfly Valves.
Our portfolio 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, to name a few. Our valves are available in manual, power-driven, pneumatic, and hydraulic drive options. We utilize superior materials such as A216WCB, A217 WC6/WC9, A351 CF8/CF8M/CF3/CF3M, etc., with specifications ranging from 1/2" to 120", and capable of withstanding pressures from ANSI 150# to 2500#, and temperatures between -196ºC and 1100ºC.
Leveraging advanced production technology and an impeccable quality assurance system, SNT valves are extensively utilized across industries such as petrochemical, oil, steel & iron, paper manufacturing, and power stations. Our esteemed clientele includes notable entities like SINOPEC QILU branch, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi branch, PETROCHINA Ningxia branch, SINOPEC Qingdao Refinery, SINOPEC Qingdao branch, and many more.
At SNT, we prioritize our customers' profitability, dedicating ourselves to the pursuit of superior quality and brand excellence. Our comprehensive quality assurance and after-sales support systems ensure that SNT valves collaborate harmoniously with all our partners, paving the way for shared success and prosperity.
Address:
Shiao International 1602, Shinan District, Qingdao, Shandong, China
Business Type:
Manufacturer/Factory
Business Range:
Industrial Equipment & Components
Management System Certification:
ISO 9001, ISO 20000, IATF16949, HSE
Company Introduction:
SNT Machinery(Qingdao)Co., Ltd. Stands as a leading authority in control valve manufacturing. Based in the strategic hub of Qingdao, Shandong province, our sprawling 42, 000m² Facility is outfitted with cutting-edge workshops and advanced production equipment. As a high-tech enterprise, we take pride in owning independent intellectual property rights and implementing cutting-edge international management and production techniques. Our team of over 150 dedicated professionals includes 15% R&D specialists and 30% with graduate degrees or higher. This commitment to excellence and innovation enables us to produce a diverse array of top-tier valves, widely utilized across the petrochemical, oil, and coal chemical industries. In an impressive milestone, our sales neared 100 billion in 2017. SNT proudly holds the prestigious TS special equipment manufacturing certificate and ISO 9001 certification. We are honored to possess net qualification certificates from industry titans including SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. Our technological prowess has garnered us multiple national patents. We design and manufacture an extensive range of valves adhering to stringent ANSI, API, DIN, BS, and JIS standards. By merging the finest attributes of world-renowned valves with our innovative R&D, we offer a comprehensive portfolio featuring GLOBE Valves, High-Pressure Boiler Blow-down Valves, High-performance Butterfly Valves, Angle-regulating Valves, Eccentric Rotary Valves, and beyond.
Our product lineup showcases V Ball Valves, High Wear-resistant Ball Valves, High-Pressure Steam Valves, Micro-flow Control Valves, Self-operated Control Valves, and Cryogenic Valves, available in manual, electric, pneumatic, and hydraulic driving forms. We use premium materials such as A216WCB, A217 WC6/WC9, and A351 CF8/CF8M/CF3/CF3M. Our specifications range from 1/2" to 120" in size, accommodating working pressures from ANSI 150# to 2500# and operating temperatures from -196º C to 1100º C. Utilizing our advanced production technology, precise management, and robust quality assurance systems, SNT valves earn trust across diverse industries including petrochemical, oil, steel, iron, paper manufacturing, and power stations. Our esteemed clientele features SINOPEC QILU branch, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi branch, PETROCHINA Ningxia branch, among others. At SNT, we are devoted to maximizing customer profitability by consistently delivering superior quality and establishing a reputable brand. Our unwavering commitment to comprehensive quality assurance and exemplary after-sales services ensures that SNT valves cultivate enduring partnerships with our clients, driving mutual success and long-term prosperity.
