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 excellence from SNT Machinery (Qingdao) Co., Ltd. This innovative valve is your ultimate solution for automatic pressure regulation, functioning solely on the energy of the regulated medium, eliminating the need for any external power sources like electricity or gas, thus ensuring remarkable energy savings. This makes it an ideal choice for energy-conscious applications and remote locations where power access is limited. Versatile and adaptable, the AOC-3000 offers customizable pressure settings within a specific range, delivering exceptional flexibility for diverse industrial needs. Choose from three distinct valve forms based on your process requirements: the AOC-3111 single-seated valve, the AOC-3113 sleeve valve, or the AOC-3114 double-seated valve. Each option is tailored to meet specific working conditions, be it differential pressure, temperature, medium state, or leakage demands. Coupled with this is an array of actuator types designed for varying applications: from the standard diaphragm and reinforced diaphragm to the robust piston and the resilient metal diaphragm (bellows). With its fast-opening flow characteristics, the AOC-3000 ensures sensitive and precise adjustments with an error margin of ≤10%. Compact yet powerful, this valve eclipses traditional heavy hammer pressure-reducing valves with its minimal space requirements and ease of adjustment. As a result, it finds extensive application across industries including petroleum, chemical, power, metallurgy, food processing, light textile, machinery manufacturing, and civil construction. Whether it's for gas, liquid, or steam pressure reduction, stabilization, or relief - both for pre-valve and post-valve adjustments - the AOC-3000 stands as an epitome of performance and reliability. Actuator Features
Figure 1a showcases the advanced mechanism used to precisely regulate the pressure of post-control valves, designed with a pressure-closed action type. The operation is elegantly simple: the medium enters the valve body following the directional arrow, experiencing a refined throttling process by the valve seat and spool. Concurrently, via the pressure tube (when involving steam, accompanied by a condenser), the medium channels into the actuator, engaging the diaphragm. This precise interaction results in the spool's strategic displacement, effectively achieving pressure reduction and stabilization. When the downstream pressure escalates, the diaphragm experiences an increased force, compressing the spring, which in turn drives the spool to diminish the valve opening, allowing the pressure to fall back to the predetermined setting. Conversely, should the downstream pressure decline, the force on the diaphragm lessens, and the spring's reactive push prompts the spool to enhance the valve opening until the pressure ascends to the set value.
Figure 1b highlights the adept regulator designed for controlling upstream valve pressure, featuring a pressure open action mode. The operational principle is ingeniously straightforward: the medium enters the valve body, adhering to the arrow's orientation, undergoing throttling via the valve seat and spool. Simultaneously, when the scenario involves steam plus a condenser, it enters the actuator and affects the diaphragm, instigating the spool's strategic movement for optimal pressure relief and stabilization. An increase in upstream pressure amplifies the force on the diaphragm, compressing the spring and prompting the spool to widen the valve opening until the pressure subsides to the established parameter. On the other hand, a reduction in upstream pressure diminishes the force acting on the diaphragm. The spring's reactive force then drives the spool, reducing the valve opening until the pressure reinstates to the set value. When upstream pressure falls below the set threshold, the valve remains invariably 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 applications involving gas or low viscosity liquid media, the AOC-3111 model of the self-operated pressure regulating valve by SNT Machinery (Qingdao) Co., Ltd. is optimally mounted in an upright position on a horizontal pipeline. However, in situations where space constraints exist, it can be mounted upside down or at a diagonal angle. If you can confirm that the medium is clean, you may choose to omit the installation of part 3, simplifying the setup.
In scenarios where the valve is employed with steam or high viscosity liquid media, the AOC-3111 self-operated pressure regulating valve should typically be installed upside down on a horizontal pipeline. This installation method ensures optimal performance and reliability for such demanding media conditions.
Production application
Company Profile
SNT Machinery (Qingdao) Co., Ltd. is a dynamic leader in the production of control valves, seamlessly integrating manufacturing, design, sales, and services. Located in the vibrant city of Qingdao, Shandong Province, our expansive 42,000 square meters facility boasts cutting-edge workshops and state-of-the-art production equipment. As a high-tech enterprise with unique intellectual property rights, we have incorporated advanced management strategies and production expertise from around the globe. With a dedicated team of over 150 professionals, including a significant 15% specializing in R&D and 30% with graduate or higher qualifications, we pride ourselves on a robust production management team and a relentless pursuit of technological innovation. Our commitment to quality results in a substantial output of superior valves, catering to the demanding needs of petrochemical, oil, and coal chemical industries, reaching a sales value approaching 100 billion in 2017.
SNT has proudly attained the TS special equipment manufacturing certificate and ISO 9001 accreditation, along with the net qualification certification from industry giants such as SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. Our portfolio boasts numerous national patents across various technologies. We possess the capability to design and produce a comprehensive range of valves adhering to international standards like ANSI, API, DIN, BS, and JIS. By merging the strengths of globally renowned valves with our independent R&D, we've mastered the production of diverse valve types 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 extensive valve range further encompasses V Ball Valves, High Wear-resistant Ball Valves, High Pressure Steam Valves, Micro-flow Control Valves, Self-operated Control Valves, and Cryogenic Valves. Our driving mechanisms span manual, power-driven, pneumatic, and hydraulic options. The primary materials utilized in construction include A216WCB, A217 WC6/WC9, A351 CF8/CF8M/CF3/CF3M. Our specifications are broad, ranging from 1/2" to 120", capable of handling working pressures from ANSI 150# to 2500#, and operational temperatures from an extreme -196ºC to 1100ºC.
With a foundation rooted in advanced production technology, rigorous management, and an unwavering quality assurance system, SNT valves have earned their place in the heart of the petrochemical, oil, steel & iron, paper manufacturing, and power station industries. Our esteemed clientele features leading names such as SINOPEC QILU branch, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi branch, PETROCHINA Ningxia branch, SINOPEC Qingdao Refinery, and SINOPEC Changling branch, among others.
At SNT, we prioritize our users' profitability and dedicate ourselves to building a legacy of outstanding quality and a reputable brand. Our meticulous quality assurance and comprehensive after-sales systems ensure that SNT valves collaborate seamlessly with our customers to achieve shared 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.
