Durable Self-Operated Pressure Regulator for Self-Acting Pressure Control with Nps 3/4′′-Nps 12′′ for Nominal Diameter

• Customization: Available
• Temperature: Ordinary Temperature
• Certification: GS, RoHS, CE, ISO9001
• Model NO.: AOC-3111K
• Standard: Standard
• Connection Mode: Flange
• Power: Pneumatic
• Material: Stainless Steel
• Type: Self-Operated
• 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.
• Trademark: SNT
• Origin: China
• HS Code: 8481804090
• Production Capacity: 500000PCS/Year

Product Description

 

Product Description

_{Introducing the AOC-3000 Self-Operated Pressure Regulating Valve, a pioneering solution from SNT Machinery (Qingdao) Co., Ltd. This cutting-edge product revolutionizes pressure regulation by operating independently, utilizing the inherent energy of the regulated medium, thus eliminating the need for any external power sources. Perfectly engineered for locations lacking electricity or gas, it is a beacon of energy efficiency and sustainability. You can effortlessly adjust the pressure setting value within a specified range to meet your specific requirements. The versatile AOC-3000 comes in three distinct valve forms to cater to diverse process scenarios: AOC-3111 (Single-Seated), AOC-3113 (Sleeve), and AOC-3114 (Double-Seated) self-acting pressure regulating valves. Tailor your choice based on working conditions such as differential pressure, temperature, medium state, and leakage demands. Furthermore, the AOC-3000 offers three innovative actuator types to suit various process needs: diaphragm (standard and reinforced), piston, and metal diaphragm (bellows). Boasting quick-open flow characteristics, this valve ensures a swift and precise response with an impressive adjustment accuracy (error ≤10%). Compact and user-friendly, it occupies minimal space compared to traditional heavy hammer pressure reducing valves. Its versatility makes it indispensable across industries including petroleum, chemical, electric power, metallurgy, food processing, light textile, machinery manufacturing, and civil construction. Whether for gas, liquid, or steam pressure reduction, stabilization (post-valve), or pressure relief and stabilization (pre-valve), the AOC-3000 is the ultimate choice for optimizing your system's performance.}
 

Actuator Features

 

Figure 1a illustrates the sophisticated mechanism designed to manage the pressure of the downstream valve using a pressure-closed system. Here's how it works: As the fluid gracefully enters the valve body following the directional arrow, it undergoes a meticulous throttling process via the valve seat and spool. Concurrently, it channels through the pressure tube (condensers are added when the medium is steam) and exerts force on the diaphragm within the actuator. This adept interaction prompts the spool to adjust its position, achieving a harmonious balance of pressure reduction and stabilization. Should the downstream pressure rise, the enhanced force on the diaphragm compresses the spring, triggering the spool to constrict the valve opening, ensuring the pressure realigns to the desired setting. Conversely, a reduction in downstream pressure diminishes the force on the diaphragm, allowing the spring's counteraction to expand the valve opening, ensuring the pressure elevates back to the target level.

 

Figure 1b unveils the intricately designed regulator dedicated to managing the upstream pressure with a pressure-open mechanism. The fluid navigates into the valve body, entering from the arrow-indicated direction and is expertly throttled through the valve seat and spool. Meanwhile, the pressure tube-when dealing with steam, enhanced with condensers-feeds into the actuator, impacting the diaphragm robustly. This dynamic interaction causes the spool to adjust accordingly, achieving pressure relief and stabilization seamlessly. If there is an uptick in upstream pressure, the diaphragm's force intensifies, compressing the spring, prompting the spool to expand the valve opening until equilibrium is restored at the set pressure level. Alternately, a drop in upstream pressure reduces the diaphragm's exertion, and the spring's reactive force narrows the valve opening, reinstating the pressure to the predetermined level meticulously. When the upstream pressure falls beneath the set threshold, the valve remains securely closed, ensuring optimal 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 applications involving gas or low viscosity liquid media, the installation of the AOC-3111 model self-operated pressure regulating valve is typically straightforward. It is ideally mounted upright on a horizontal pipe to ensure optimal performance. However, if spatial constraints exist, it can be adjusted to an upside-down or diagonal position. Notably, if the medium is confirmed to be clean, the installation of part 3 may be deemed unnecessary, further simplifying the process.

 

In scenarios where the valve is applied to steam or high viscosity liquid media, the AOC-3111 model self-operated pressure regulating valve should be installed in an inverted position on a horizontal pipe. This orientation is essential to maintain the valve's functional integrity and effectiveness in such challenging conditions.
 

Production application

 

Company Profile

SNT Machinery (Qingdao) Co., Ltd., a visionary leader in the world of control valves, seamlessly integrates manufacturing, design, sales, and service under one roof. Our company, strategically nestled in the vibrant city of Qingdao, Shandong province, spans an impressive 42,000 square meters, boasting cutting-edge workshops and state-of-the-art production equipment. As a high-tech enterprise, we hold independent intellectual property rights and leverage advanced management and production methodologies from around the globe. Our team of over 150 dedicated professionals includes a robust 15% specializing in research and development, with 30% holding graduate or higher degrees. Through an unwavering commitment to quality production management and pioneering technology, we craft high-quality valves that cater to the petrochemical, oil, and coal chemical sectors. In 2017 alone, our sales soared to an astounding nearly 100 billion.

SNT proudly holds the prestigious TS special equipment manufacturing certificate and ISO 9001 certification. We are recognized with the net qualification certificate from industry giants like SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. Our technological prowess is further endorsed by numerous National Patents. We expertly design and manufacture an extensive range of valves adhering to ANSI, API, DIN, BS, and JIS standards. By amalgamating the benefits of renowned global valves with our innovative R&D, we stand as pioneers in crafting diverse valve types, including GLOBE, High Pressure Boiler Blow-down Valves, and High-performance Butterfly Valves. Our offerings extend to Angle-regulating Valves, Eccentric Rotary Valves, and T Three-eccentric Center Butterfly Valves.
Our diverse valve portfolio 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, among others. We provide varying driving forms such as manual, power-driven, pneumatic, and hydraulic. Our main components are crafted from premium materials including A216WCB, A217 WC6/WC9, and A351 CF8/CF8M/CF3/CF3M. Our specifications range from 1/2" to 120", handling working pressures from ANSI 150# to 2500#, and designed to withstand extreme temperatures from -196ºC to 1100ºC.

With our advanced production technology and robust quality assurance systems, SNT Valves have become indispensable across industries like petrochemical, oil, steel & iron, paper manufacturing, and power stations. Our esteemed clientele includes prominent entities such as SINOPEC QILU branch, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi branch, and PETROCHINA Ningxia branch, among others.

At SNT, we prioritize our users' profitability, dedicating ourselves to forging a path of exceptional quality and renowned brand excellence. Our comprehensive quality assurance and after-sales systems ensure that SNT valves flourish alongside our customers, together creating a prosperous future.