Basic Info.
Temperature
Ordinary Temperature
Certification
GS, RoHS, CE, ISO9001
Media
Gas, Oil, Water, Acid
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
Mounting Method
For optimal performance in gas or low viscosity liquid media applications, the AOC-3111 type self-operated pressure regulating valve by SNT Machinery (Qingdao) Co., Ltd. is traditionally mounted upright on a horizontal pipeline. However, should spatial constraints arise, it can be effectively installed upside down or at a diagonal. Note: In scenarios where the medium is verified as clean, the installation of part 3 is optional.
In applications involving steam or high viscosity liquid media, the AOC-3111 type self-operated pressure regulating valve is customarily installed upside down on a horizontal pipe for enhanced functionality and efficiency.
Product Description
Introducing the remarkable AOC-3000 self-operated pressure regulating valve-an innovative masterpiece in the realm of pressure control. This advanced executive product operates independently, harnessing the inherent energy of the regulated medium, eliminating the need for external power sources. Experience its unparalleled adaptability in locations devoid of electricity or gas, all while reaping the benefits of energy conservation. Effortlessly adjust the pressure setting values within a broad range, tailored to your specific requirements. The AOC-3000 series offers a versatile selection of valve forms to cater to diverse process environments: AOC-3111 (single-seated); AOC-3113 (sleeve type); and AOC-3114 (double-seated). Users can effortlessly select according to the operational conditions such as differential pressure, temperature, medium state, and leakage needs. Additionally, the AOC-3000 series features three actuator types to enhance compatibility with various process demands: diaphragm (standard and reinforced), piston, and metal diaphragm (bellows). Designed with fast-opening flow characteristics, this valve ensures swift response and precise adjustment accuracy (error ≤10%). Its compact design occupies minimal space compared to the bulky hammer-type pressure reducing valves, making it a preferred choice across industries. Widely utilized in petroleum, chemical, electric power, metallurgy, food, light textile, machinery manufacturing, and civil construction sectors, it excels in gas, liquid, and steam pressure reduction, stabilization (post-valve adjustment), pressure relief, and stabilization (pre-valve adjustment). Embrace the future of pressure regulation with the AOC-3000 self-acting pressure regulating valve-a harmonious blend of innovation, efficiency, and versatility. Actuator Features
Figure 1a showcases an advanced system to expertly regulate post-control valve pressure, utilizing a pressure-closed valve action mode. The operational principle is ingeniously designed: guiding the medium flow into the valve body following the directional arrow, it passes through a meticulous throttling process via the valve seat and spool. An alternative route channels through the pressure tube, specifically adapted for steam with a condenser, reaching the diaphragm actuator. This interaction causes a precise displacement of the spool, achieving remarkable pressure reduction and stabilization. An increase in post-valve pressure escalates diaphragm force, compressing the spring and manipulating the spool to constrict the valve opening, until equilibrium is restored at the predetermined pressure level. Conversely, should the post-valve pressure drop, the diaphragm's force diminishes, allowing the spring's reaction to widen the valve opening, ensuring pressure elevation back to the desired set point.
Figure 1b illustrates a sophisticated regulator designed to impeccably manage pre-valve pressure with a pressure-open valve action mode. The operational mechanics are as follows: the medium enters the valve body, indicated by the arrow's direction, undergoing careful throttling via the valve seat and spool. Simultaneously, via the pressure tube, tailored for steam with a condenser, the medium is directed to the diaphragm actuator, inducing a measured spool displacement crucial for pressure relief and stabilization. An increase in pre-valve pressure amplifies diaphragm force, compressing the spring and prompting the spool to expand the valve opening until pressure decreases to the designated level. Conversely, a decrease in pre-valve pressure reduces diaphragm force, while the spring's reaction compels the spool to contract the valve opening, boosting pressure until it meets the set threshold. Notably, should pre-valve pressure fall below the set value, the valve remains firmly closed, ensuring optimal control and 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 |
Production application
Company Profile
SNT Machinery (Qingdao) Co., Ltd embodies excellence in the production of control valves, integrating the precision of manufacturing, innovative design, seamless sales, and dedicated service into a cohesive entity. Nestled in the vibrant city of Qingdao, Shandong Province, SNT spans an impressive 42,000 square meters, boasting cutting-edge workshops and state-of-the-art production facilities. As a high-tech enterprise, we pride ourselves on possessing independent intellectual property rights and employ advanced management and production methodologies from across the globe. Our talented workforce exceeds 150, with 15% dedicated R&D specialists, and 30% holding graduate or higher degrees. With a keen focus on superior production management and pioneering technological research, we deliver substantial volumes of premium valves that meet the demands of the petrochemical, oil, and coal chemical sectors. In 2017 alone, our sales soared to nearly 100 billion.
SNT has achieved the prestigious TS special equipment manufacturing certificate and ISO 9001 accreditation, along with a net qualification certificate from industry giants SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. Our commitment to innovation is underscored by numerous national patents. We excel in designing and manufacturing a vast array of valves adhering to ANSI, API, DIN, BS, and JIS standards. By synthesizing the strengths of renowned global valve technologies with our own research and development, we offer an extensive range of valves, including GLOBE, high-pressure boiler blow-down valves, high-performance butterfly valves, angle-regulating valves, and eccentric rotary valves. Our lineup also features T three-eccentric center butterfly valves.
Our product portfolio 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. We provide diverse driving forms, such as manual operation, power-driven, pneumatic, and hydraulic drive systems. The primary components are crafted from top-grade materials like A216WCB, A217 WC6/WC9, A351 CF8/CF8M/CF3/CF3M, ensuring robustness and reliability. Specifications range from 1/2" to 120", with working pressures from ANSI 150# to 2500#, and operating temperatures spanning -196ºC to 1100ºC.
With our advanced production technology and quality assurance systems, SNT valves have become integral to the petrochemical, oil, steel & iron, paper manufacturing, and power station industries. Esteemed clients such as SINOPEC's QILU and Qingdao branches, CNOOC's Huizhou Refinery, PETROCHINA's Guangxi and Ningxia branches, SINOPEC's Changling and Jinan branches, and more, trust our products for their critical operations.
We prioritize our customers' success, dedicating ourselves to crafting exceptional quality and a prestigious brand reputation. Our comprehensive quality assurance and after-sales service systems are designed to empower SNT valves, fostering prosperous partnerships with our valued clients.
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.
