Self-Operated Pressure Regulator for Advanced Control Valve Systems

• 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, a remarkable self-operated pressure regulating valve from SNT Machinery (Qingdao) Co., Ltd., designed with the utmost innovation for advanced control valve systems. This intelligent executive product leverages the energy of the regulated medium itself, eliminating the need for any external power source, thus offering a sustainable solution for energy conservation. The standout feature of the AOC-3000 is its adaptability to environments lacking electricity or gas, making it indispensable in energy-conscious operations. With a flexible pressure setting range, it caters to diverse application needs seamlessly. Tailored to meet various process requirements, the AOC-3000 is available in three distinct valve configurations: the AOC-3111 single-seated, the AOC-3113 sleeve, and the AOC-3114 double-seated self-acting pressure regulating valves. Each variant is crafted for optimal performance based on specific working conditions like differential pressure, temperature, medium state, and leakage demands. Users have the liberty to select the perfect fit for their unique operational challenges. Moreover, the AOC-3000 offers three sophisticated actuator types: diaphragm (standard and reinforced), piston, and metal diaphragm (bellows), designed to accommodate various process scenarios. Boasting fast-opening flow characteristics, this valve ensures precise control with an adjustment accuracy of error ≤10%. The compact design takes up minimal space compared to traditional heavy hammer-type pressure reducing valves, making it easy to install and adjust. This versatility and precision make the AOC-3000 a preferred choice across industries including petroleum, chemical, electric power, metallurgy, food, light textile, and machinery manufacturing. It excels in tasks such as gas, liquid, and steam pressure reduction and stabilization, both post- and pre-valve adjustments, ensuring reliable pressure management across a multitude of applications.}
 

Actuator Features

 

Figure 1a illustrates an innovative approach to regulating post-control valve pressure with precision. This pressure-closed valve system operates by allowing the medium to gracefully flow into the valve body, as directed by the arrow, and then be dispensed through the valve seat and spool with finesse. The alternative route, via the pressure tube - particularly when dealing with steam plus a condenser - introduces the medium into the actuator, engaging the diaphragm. As a result, the spool adjusts its position to seamlessly achieve pressure reduction and stabilization. When the downstream pressure rises, the diaphragm's force intensifies, compressing the spring and driving the spool to decrease the valve opening until equilibrium is restored to the predetermined setting. Conversely, should the downstream pressure drop, the diaphragm's force diminishes, allowing the spring's responsive force to guide the spool, increasing the valve opening until the set pressure level is reinstated.

 

Figure 1b showcases a sophisticated pressure regulation mechanism focused on controlling the pressure ahead of the valve, characterized by a pressure-open action mode. The medium enters the valve body in the direction indicated by the arrow, subsequently facilitated through the valve seat and spool after throttling. An alternative path via the pressure tube - particularly applicable when employing steam plus a condenser - channels the medium to the actuator, engaging the diaphragm. This engagement prompts the spool to adjust its position, achieving the dual objectives of pressure relief and stabilization. Should the upstream pressure rise, the force on the diaphragm escalates, compressing the spring and prompting the spool to increase the valve opening until equilibrium is achieved at the set pressure level. Conversely, if the upstream pressure declines, the force on the diaphragm lessens, allowing the spring's reactive force to guide the spool in reducing the valve opening until the set pressure level is recovered. Remarkably, if the upstream pressure falls below the set threshold, the valve remains steadfastly 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 gas or low viscosity liquid environments, the AOC-3111 Self-Operated Pressure Regulating Valve is optimally installed in an upright position on a horizontal pipe. Should spatial constraints be present, it may be mounted upside down or diagonally. If the medium is verified to be clean, the installation of part 3 can be optionally omitted for enhanced convenience.

 

In cases where the valve is employed for steam or high viscosity liquid media, it is standard practice to install the AOC-3111 Self-Operated Pressure Regulating Valve upside down on a horizontal pipe. This orientation ensures superior performance and efficiency.
 

Production application

 

Company Profile

SNT Machinery (Qingdao) Co., Ltd. stands proudly at the forefront of innovative control valve manufacturing. Seamlessly integrating design, production, sales, and services, we are strategically located in the vibrant city of Qingdao, Shandong province. With an expansive facility covering 42,000m², we boast state-of-the-art workshops and advanced production machinery. As a distinguished high-tech enterprise, we hold independent intellectual property rights and incorporate the industry's leading management and production expertise. Our dynamic team is comprised of over 150 dedicated professionals, with a robust 15% specializing in R&D, and 30% holding graduate or higher degrees. This exemplary team drives our production of premium quality valves, extensively employed in petrochemical, oil, and coal chemical industries. We achieved an impressive sales milestone of nearly 100 billion in 2017, a testament to our commitment to excellence and innovation.

SNT proudly holds the prestigious TS Special Equipment Manufacturing Certificate and ISO 9001 certification, along with vital net qualification endorsements from SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. Our cutting-edge technologies have earned us numerous national patents. We excel in designing and producing a complete range of valves adhering to ANSI, API, DIN, BS, and JIS standards. By harmonizing the strengths of world-renowned valves with our proprietary research and development, we craft an extensive array of valves, 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 portfolio extends to V Ball Valves, High Wear-resistant Ball Valves, High Pressure Steam Valves, Micro-flow Control Valves, Self-operated Control Valves, and Cryogenic Valves, to name a few. Our valves are available in manual, power-driven, pneumatic, and hydraulic drive options. We utilize superior materials such as A216WCB, A217 WC6/WC9, A351 CF8/CF8M/CF3/CF3M, etc., with specifications ranging from 1/2" to 120", and capable of withstanding pressures from ANSI 150# to 2500#, and temperatures between -196ºC and 1100ºC.

Leveraging advanced production technology and an impeccable quality assurance system, SNT valves are extensively utilized across industries such as petrochemical, oil, steel & iron, paper manufacturing, and power stations. Our esteemed clientele includes notable entities like SINOPEC QILU branch, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi branch, PETROCHINA Ningxia branch, SINOPEC Qingdao Refinery, SINOPEC Qingdao branch, and many more.

At SNT, we prioritize our customers' profitability, dedicating ourselves to the pursuit of superior quality and brand excellence. Our comprehensive quality assurance and after-sales support systems ensure that SNT valves collaborate harmoniously with all our partners, paving the way for shared success and prosperity.