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 revolutionary product by SNT Machinery (Qingdao) Co., Ltd. This state-of-the-art valve operates independently, requiring no external energy sources, as it harnesses the energy of the regulated medium itself. Perfect for areas devoid of electricity or gas, it epitomizes energy efficiency and cost-effectiveness. The AOC-3000's pressure setting is highly adaptable, allowing for seamless adjustments within a designated range. It offers versatility with three distinctive valve forms designed to cater to diverse process needs: the AOC-3111 single-seated, AOC-3113 sleeve, and AOC-3114 double-seated self-acting pressure regulating valves. Users can tailor their choice based on specific working conditions such as differential pressure, temperature, medium state, and leakage requirements. Additionally, this advanced valve is available in three actuator types-diaphragm (normal and reinforced), piston, and metal diaphragm (bellows)-to suit various process situations. The AOC-3000 boasts fast-opening flow characteristics, ensuring responsive action and exceptional adjustment precision (error ≤10%). Its compact design offers space efficiency compared to traditional heavy hammer type pressure reducing valves, and it is user-friendly for adjustments. This makes the AOC-3000 ideal for broad applications across industries including petroleum, chemical, electric power, metallurgy, food, textiles, machinery manufacturing, and civil construction. It excels in gas, liquid, and steam pressure reduction, stabilization (post-valve adjustment), pressure relief, and pre-valve stabilization, serving as the quintessential solution for modern industry demands. Actuator Features
Figure 1a: This innovative device is engineered to expertly manage the post-control valve pressure with its pressure-closed action mode. Here's how it works: The medium flows seamlessly into the valve body, following the directional arrow, and undergoes efficient throttling by the valve seat and spool. Additionally, in systems where the medium is steam, complemented by a condenser, it is channelled through a pressure tube into the actuator, which precisely engages the diaphragm. This mechanism ensures that the spool adjusts its position dynamically, achieving the dual goals of pressure reduction and stability. Should the pressure after the valve rise, the diaphragm experiences increased force, compressing the spring and driving the spool to constrict the valve opening until the desired pressure is attained. Conversely, a decrease in downstream pressure results in diminished diaphragm force, enabling the spring's reaction force to expand the valve opening, restoring pressure to the set value.
Figure 1b: This regulator is adept at controlling the pressure ahead of the valve, operating as a pressure-open type. The action principle is as follows: The medium enters the valve body as indicated by the arrow, undergoing precise throttling by the valve seat and spool. In applications with steam and a condenser, the medium is directed through a pressure tube to the actuator, engaging the diaphragm. This results in a precise spool displacement, fulfilling the objectives of pressure relief and stabilization. An increase in pre-valve pressure augments the diaphragm force, compressing the spring and driving the spool to expand the valve opening until pressure descends to the set parameter. If pre-valve pressure decreases, the diaphragm force reduces, prompting the spring's reactive force to drive the spool, minimizing the valve opening to elevate pressure to the set value. In circumstances where pre-valve pressure is below the set threshold, the valve remains consistently 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
In the realm of gas or low viscosity liquid media, the AOC-3111 Self-Operated Pressure Regulating Valve by SNT Machinery (Qingdao) Co., Ltd. finds its optimal placement in an upright position on a horizontal pipeline. However, when spatial constraints present themselves, this versatile valve can also be installed upside down or at an angle. Importantly, if the medium's cleanliness is confirmed, the installation of part 3 can be omitted, simplifying the process.
For steam or high viscosity liquid media applications, the AOC-3111 Self-Operated Pressure Regulating Valve by SNT Machinery (Qingdao) Co., Ltd. demonstrates its adaptability by being installed upside down on a horizontal pipeline, ensuring efficient operation in diverse conditions.
Production application
Company Profile
SNT Machinery (Qingdao) Co., Ltd. stands as an illustrious leader in the realm of control valve production, seamlessly blending manufacturing prowess, visionary design, robust sales, and impeccable service under one roof. Strategically nestled in the vibrant city of Qingdao, Shandong province, our expansive 42,000m2 facility boasts state-of-the-art workshops and cutting-edge production equipment. As a beacon of high-tech innovation, we pride ourselves on holding independent intellectual property rights and integrating advanced international management and production methodologies. Our dynamic team comprises over 150 dedicated professionals, with R&D specialists making up 15% and a remarkable 30% holding graduate or higher degrees. Fueled by an exceptional production management team and pioneering research and development, we excel in crafting high-quality valves that serve the petrochemical, oil, and coal chemical sectors. In 2017, our sales soared to nearly 100 billion, a testament to our unwavering commitment to excellence.
SNT has proudly attained the prestigious TS special equipment manufacturing certificate and ISO 9001 certification, alongside acquiring the net qualification certification from industry giants such as SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. Our technological mastery is further validated by a myriad of National Patents. We specialize in designing and manufacturing a comprehensive array of valves compliant with ANSI, API, DIN, BS, and JIS standards. By synergizing the strengths of globally renowned valves with our own innovative research and development, we currently produce a versatile range 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 line 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 driving mechanisms encompass manual, power-driven, pneumatic, and hydraulic options. The materials for principal components include A216WCB, A217 WC6/WC9, A351 CF8/CF8M/CF3/CF3M, among others. We offer specifications ranging from 1/2" to 120", with working pressures from ANSI 150# to 2500#, and operating temperatures from -196ºC to 1100ºC.
Leveraging sophisticated production technology, management, and a robust quality assurance system, SNT Valves have earned widespread application in the petrochemical, oil, steel & iron, paper manufacturing, and power station industries. Our esteemed clientele includes industry leaders such as SINOPEC QILU branch, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi branch, and PETROCHINA Ningxia branch, among others.
At SNT, we prioritize the profitability and satisfaction of our users, dedicating ourselves to crafting a brand synonymous with outstanding quality. Our unrivaled quality assurance and comprehensive after-sales services ensure that SNT valves foster prosperity in collaboration with all our valued customers.
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.
