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 Self-Operated Pressure Regulating Valve-an extraordinary executive product that operates independently without the need for external energy sources. Ingeniously utilizing the regulated medium's own energy, this valve seamlessly manages pressure in environments devoid of electricity or gas, offering remarkable energy savings. The adjustable pressure setting provides flexibility within a defined range, catering to your specific needs. Tailored for various process demands, the AOC-3000 is available in three distinct valve configurations: AOC-3111 (single-seated), AOC-3113 (sleeve), and AOC-3114 (double-seated), empowering users to select based on working conditions, including differential pressure, temperature, medium state, and leakage requirements. Furthermore, the AOC-3000 offers three actuator types: diaphragm (available in normal and reinforced variants), piston, and metal diaphragm (bellows), ensuring adaptability for diverse processes. With its fast-opening flow characteristics, this valve delivers exceptionally sensitive responses and precise adjustments (with an impressive error margin of ≤10%). Its compact design, compared to the bulky hammer-type pressure reducing valves, allows for easy installation and adjustment, making it a preferred choice in industries such as petroleum, chemical, electric power, metallurgy, food, light textile, machinery manufacturing, civil construction, and more. It excels in gas, liquid, and steam applications for pressure reduction, stabilization (post-valve adjustment), relief, and stabilization (pre-valve adjustment), setting a benchmark for excellence in pressure management solutions. Actuator Features
Figure 1a showcases a sophisticated mechanism designed to manage the pressure in a post-control valve using a pressure-closed action mode. Here's the impressive process in action: As the medium makes its entrance into the valve body, guided by the direction of the arrow, it passes through the valve seat and spool, undergoing precise throttling. Simultaneously, it navigates through a pressure tube-enhanced with a condenser for steam mediums-and engages the actuator, activating the diaphragm. This orchestrated movement triggers a corresponding displacement of the spool, expertly calibrating the pressure reduction and stabilization. When the post-valve pressure surges, the diaphragm experiences an increased force, compressing the spring and driving the spool to expertly minimize the valve opening until equilibrium is restored. Conversely, should the pressure decline, the diaphragm's force diminishes, allowing the spring's reactionary push to expand the valve opening, ensuring pressure returns to the designated set value with unparalleled precision.
Figure 1b presents a regulator engineered to adeptly manage the pressure ahead of the valve, utilizing a pressure open action mode. Here's the process in detail: The medium flows into the valve body, aligning with the arrow's direction, and exits through the valve seat and spool, undergoing precise throttling. Concurrently, it travels through a pressure tube-optimized with a condenser for steam mediums-and influences the actuator, impacting the diaphragm. This dynamic interaction prompts a precise displacement of the spool, achieving flawless pressure relief and stabilization. In scenarios where pre-valve pressure increases, the diaphragm is subjected to intensified force, compressing the spring and driving the spool to amplify the valve opening, thus restoring pressure to the set value. Conversely, if the pressure dwindles, the diaphragm's force lessens, enabling the spring's reaction to contract the valve opening, effectively elevating the pressure to the desired level. Notably, when the pressure remains below the set value, the valve remains securely 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 optimal performance in regulating pressure of gas or low viscosity liquid media, the AOC-3111 type of self-operated pressure regulating valve by SNT Machinery (Qingdao) Co., Ltd. is recommended to be installed in an upright position on a horizontal pipe. However, if spatial constraints demand, it can be installed upside down or diagonally. In instances where the medium is confirmed to be clean, component part 3 can be omitted to streamline the installation process.
When dealing with steam or high viscosity liquid media, the AOC-3111 self-operated pressure regulating valve is optimally installed upside down on a horizontal pipe. This setup ensures the highest efficiency and stability in regulating challenging media.
Production application
Company Profile
SNT Machinery (Qingdao) Co., Ltd stands as a pioneering producer of control valves, seamlessly integrating manufacturing, design, sales, and service into one cohesive powerhouse. Our journey commenced from a high starting point with rapid development. Nestled in the vibrant city of Qingdao, Shandong Province, our expansive facilities span over 42,000 square meters, boasting cutting-edge workshops and production equipment. As a high-tech enterprise, we possess independent intellectual property rights and have embraced advanced management and production techniques. Our dynamic team comprises over 150 dedicated professionals, with 15% specializing in R&D and 30% holding graduate or higher degrees. Driven by excellence in production management and innovative technological research, we produce vast quantities of superior quality valves utilized across petrochemical, oil, and coal chemical industries. Achieving a remarkable sales value nearing 100 billion in 2017, we continue to excel in our field.
SNT has proudly earned the TS Special Equipment Manufacturing Certificate and ISO 9001 certification, alongside the prestigious net qualification certificate from leading industry giants such as SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. Our innovation is cemented by numerous National Patents across various technologies. We possess the capability to design and manufacture a comprehensive range of valves adhering to ANSI, API, DIN, BS, and JIS standards. By blending the strengths of globally renowned valves with our own pioneering R&D, we currently produce an extensive array of valves, including GLOBE, High Pressure Boiler Blow-down Valves, High-performance Butterfly Valves, Angle-regulating Valves, and Eccentric Rotary Valves, along with T Three-eccentric Center Butterfly Valves.
Our product lineup extends to V Ball Valves, High Wear-resistant Ball Valves, High Pressure Steam Valves, Micro-flow Control Valves, Self-operated Control Valves, Cryogenic Valves, and more. Our diverse range of driving forms includes manual operation, power-driven, pneumatic, and hydraulic drive options. The primary materials utilized in our products are A216WCB, A217 WC6/WC9, A351 CF8/CF8M/CF3/CF3M, among others. Our specifications range from 1/2" to 120", with working pressures from ANSI 150# to 2500# and operational temperatures extending from -196ºC to 1100ºC.
Leveraging advanced production technology and a robust quality assurance system, SNT Valves have gained widespread application across the petrochemical, oil, steel & iron, paper manufacturing, and power station sectors. Our esteemed clientele includes industry leaders such as SINOPEC QILU branch, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi branch, PETROCHINA Ningxia branch, SINOPEC Qingdao Refinery, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi branch, PETROCHINA Ningxia branch, SINOPEC Changling branch, and Jinan branch, among others.
We prioritize our users' profits, dedicating ourselves to establishing a reputation of unparalleled quality and a prestigious brand. Our impeccable quality assurance and comprehensive after-sales systems ensure that SNT Valves collaborate with all our valued customers to create mutual prosperity and success.
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.
