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-a marvel of engineering by SNT Machinery (Qingdao) Co., Ltd. This innovative device is designed to function independently, requiring no external energy source, as it harnesses the energy of the regulated medium itself. This makes it ideal for locations lacking electricity or gas, providing an energy-efficient solution. With the flexibility to adjust pressure settings within a specified range, it is adaptable to various needs. Choose from three valve formats tailored for distinct process requirements: - AOC-3111: Single-Seated Self-Acting Valve - AOC-3113: Sleeve Self-Acting Valve - AOC-3114: Double-Seated Self-Acting Valve Select based on working conditions such as differential pressure, temperature, medium state, and leakage demands. Additionally, three actuator types are available to cater to diverse process scenarios: - Diaphragm (Standard and Reinforced) - Piston - Metal Diaphragm (Bellows) The AOC-3000 stands out with its fast-opening flow characteristics, ensuring responsive operation and precise adjustments (error margin ≤10%). Its compact design allows for easy installation, making it a preferred choice across industries such as petroleum, chemical, electric power, metallurgy, food, light textile, machinery manufacturing, and civil construction. It's perfect for applications involving gas, liquid, and steam to: - Reduce and stabilize pressure (post-valve adjustment) - Relieve and stabilize pressure (pre-valve adjustment). Actuator Features
Figure 1a, showcases a sophisticated mechanism designed to expertly manage the pressure regulation of the post-control valve with a pressure-closed operation mode. Its working principle is elegantly simple: the medium gracefully enters the valve body following the arrow's guidance and is then skillfully released by the valve seat and spool after precise throttling. Simultaneously, through the pressure tube, which includes the condenser when the medium is steam, the medium is channeled into the actuator to influence the diaphragm. This interaction prompts the spool to shift accordingly, achieving the dual goals of pressure reduction and stabilization. Should the post-valve pressure rise, the diaphragm's force intensifies, compressing the spring and adjusting the spool to minimize the valve's opening until the pressure aligns with the desired setting. Conversely, when the post-valve pressure diminishes, the diaphragm's force wanes, allowing the spring's reaction to expand the valve's opening until optimal pressure is restored.
Figure 1b, presents an adept pressure regulator for pre-valve pressure management, featuring a pressure-open operation mode. The medium gracefully enters the valve body as directed by the arrow and is deftly released through the valve seat and spool after expert throttling. Moreover, the pressure tube, accompanied by the condenser when the medium is steam, channels the medium into the actuator, influencing the diaphragm and prompting precise spool displacement for pressure relief and stabilization. If pre-valve pressure heightens, the diaphragm's force magnifies, compressing the spring and expanding the valve's opening until pressure subsides to the set value. Conversely, a reduction in pre-valve pressure decreases the diaphragm's force, allowing the spring's reaction to narrow the valve's opening until pressure is optimally restored. Should the pre-valve pressure fall below the set threshold, the valve remains closed, ensuring consistent performance. 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 media applications, the AOC-3111 type self-operated pressure regulating valve from SNT Machinery (Qingdao) Co., Ltd. ideally finds its place in an upright position on a horizontal pipe. This optimal setup ensures seamless functionality unless spatial constraints necessitate an inverted or diagonal installation. In cases where the medium is confirmed as clean, the installation may proceed without part 3, allowing for a more streamlined setup.
In scenarios involving steam or high viscosity liquid media, the AOC-3111 type self-operated pressure regulating valve by SNT Machinery (Qingdao) Co., Ltd. is conventionally installed in an inverted position on a horizontal pipe. This configuration ensures maximum efficiency and reliability for demanding conditions, leveraging the robust design of the A216 Wcb Valve Body for enhanced performance.
Production application
Company Profile
SNT Machinery (Qingdao) Co., Ltd. stands as a premier innovator and manufacturer of control valves, seamlessly integrating design, production, sales, and service. Rooted in Qingdao, Shandong province, our expansive 42,000m2 facility is equipped with cutting-edge workshops and state-of-the-art production equipment. As a high-tech enterprise boasting independent intellectual property rights, we've embraced advanced global management and production methodologies. Our dynamic team of over 150 employees includes 15% R&D specialists and 30% graduates with higher degrees. Our commitment to high-quality production and pioneering R&D propels us to manufacture superior valves for petrochemical, oil, and coal chemical sectors. By 2017, our sales soared to nearly 100 billion, reflecting our excellence and growth.
SNT proudly holds the TS special equipment manufacturing certificate and ISO 9001, along with key net qualification certificates from SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. With numerous national patents, we expertly design and manufacture an extensive array of valves conforming to ANSI, API, DIN, BS, JIS standards. By blending the strengths of globally renowned valves with robust independent R&D, we offer a comprehensive range, such as GLOBE, High Pressure Boiler Blow-down Valves, High-performance Butterfly Valves, Angle-regulating Valves, and Eccentric Rotary Valves. Our T Three-eccentric Center Butterfly Valves showcase our engineering prowess.
Our vast valve selection includes V Ball Valves, High Wear-resistant Ball Valves, High Pressure Steam Valves, Micro-flow Control Valves, Self-operated Control Valves, and Cryogenic Valves. We offer diverse driving modes, including manual, power-driven, pneumatic, and hydraulic operations. Crafted from top-grade materials like A216WCB, A217 WC6/WC9, A351 CF8/CF8M/CF3/CF3M, our valves cater to specifications ranging from 1/2" to 120", with working pressures of ANSI 150# to 2500# and temperatures from -196ºC to 1100ºC, ensuring reliability and performance across demanding applications.
Backed by superior production technology management and a robust quality assurance system, SNT Valves are esteemed in petrochemical, oil, steel, iron, paper manufacturing, and power station sectors. Our prestigious clientele includes SINOPEC QILU Branch, SINOPEC Qingdao Branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi Branch, PETROCHINA Ningxia Branch, and more, underscoring our reputation and trustworthiness in delivering exceptional valve solutions.
Our unwavering dedication to optimizing user profits guides us toward building a distinguished brand synonymous with quality excellence. Our comprehensive quality assurance and after-sales support systems ensure that SNT valves, in collaboration with our clients, pave 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.
