Precision Self-Operated Pressure Regulator for Regulated Pressure Control

• 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 remarkable AOC-3000 self-operated pressure regulating valve from SNT Machinery (Qingdao) Co., Ltd., an industry-leading executive solution designed to deliver unparalleled performance without external energy sources. This innovative product harnesses the energy of the regulated medium itself, making it the ideal choice for locations devoid of electricity or gas, all while promoting energy efficiency. With the flexibility to adjust the pressure setting value within a specified range, the AOC-3000 is engineered to adapt seamlessly to various demands. The valve is offered in three distinct forms: AOC-3111 (single-seated), AOC-3113 (sleeve), and AOC-3114 (double-seated), ensuring optimal compatibility with diverse working conditions including differential pressure, temperature, and medium states, alongside specific leakage requirements. Furthermore, the AOC-3000 caters to process-specific needs with three actuator types: diaphragm (available in both normal and reinforced variants), piston, and metal diaphragm (bellows). The valve's fast-opening flow characteristics ensure precise and responsive adjustments with an error margin of ≤10%, while its compact design surpasses traditional heavy hammer type pressure reducing valves in convenience and space efficiency. Widely acclaimed across numerous industries such as petroleum, chemical, electric power, metallurgy, food, light textiles, machinery manufacturing, and civil construction, this valve excels in regulating gas, liquid, and steam pressures for applications involving pressure reduction, stabilization both post-valve and pre-valve adjustment, and pressure relief.}
 

Actuator Features

 

Figure 1a: This illustration showcases a sophisticated pressure-closed type valve regulator. Engineered to adeptly manage the post-control valve pressure, it employs an innovative action mechanism that begins with the medium entering the valve body as indicated by the directional arrow. Following a meticulous throttling process through the valve seat and spool, the medium is further directed via a pressure tube (or condenser in steam applications) to the actuator. Here it exerts force upon the diaphragm, prompting a precise displacement of the spool. This seamless operation effectively accomplishes pressure reduction and stabilization. In scenarios where the post-valve pressure escalates, the diaphragm experiences increased force, compressing the spring and actuating the spool to reduce valve opening until equilibrium at the desired set pressure is restored. Conversely, should the pressure diminish, the diaphragm encounters reduced force, the spring's reactive push compels the spool to enlarge the valve opening, reinstating the set pressure balance.

 

Figure 1b: This diagram demonstrates the superior pressure-open type valve regulator, expertly designed to regulate the pressure preceding the valve. Initiating with the medium's entry into the valve body, directed by the arrow, the medium undergoes precise throttling via the valve seat and spool. Subsequently, it traverses through a pressure tube (or through a condenser when dealing with steam), applying pressure to the diaphragm within the actuator. This induces a controlled displacement of the spool, facilitating pressure relief and stabilization. An increase in pre-valve pressure results in heightened diaphragm force, compressing the spring and driving the spool to amplify valve opening, until the pre-valve pressure aligns with the set target. Similarly, if a pressure drop occurs, the diaphragm's force diminishes, and the spring's counteraction encourages the spool to minimize valve opening until the pre-valve pressure elevates to the set threshold. Notably, if the pre-valve pressure falls below the set value, the valve remains securely 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 the seamless integration of the AOC-3111 type self-operated pressure regulating valve in systems utilizing gas or low viscosity liquid media, the preferred installation approach is to position it upright on a horizontal pipe. This ensures optimal performance and reliability. However, in situations where spatial constraints exist, the valve can be creatively installed upside down or even at a diagonal angle. Notably, when dealing with confirmed clean media, you can simplify the setup by omitting the installation of part 3, streamlining the process further.

 

When handling steam or high viscosity liquid media, the AOC-3111 type self-operated pressure regulating valve demonstrates superior efficiency when installed upside down on a horizontal pipe. This configuration maximizes performance by accommodating the unique characteristics of these media, ensuring the valve operates at its peak functionality.
 

Production application

 

Company Profile

SNT Machinery (Qingdao) Co., Ltd. stands as a leading innovator in the realm of control valve production, seamlessly integrating manufacturing, design, sales, and service into a singular powerhouse. With an ethos of rapid development from a high starting point, SNT is strategically positioned in the vibrant city of Qingdao, Shandong province, sprawling across 42,000 m² and boasting state-of-the-art workshops and cutting-edge production facilities. Recognized as a high-tech enterprise, we pride ourselves on our independent intellectual property and the infusion of advanced management and production expertise from global leaders. Our dedicated team of over 150 professionals includes a dynamic R&D division, constituting 15% of our workforce, with 30% holding graduate-level or higher qualifications. Leveraging a robust production management team and pioneering R&D capabilities, we produce an extensive array of high-quality valves, pivotal to the petrochemical, oil, and coal chemical industries. Our remarkable sales value approached 100 billion in 2017.

SNT has earned prestigious certifications including the TS Special Equipment Manufacturing Certificate and ISO 9001, alongside net qualification certificates from SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. Our portfolio of national patents underscores our technological prowess. We adeptly design and manufacture a full suite of valves adhering to ANSI, API, DIN, BS, and JIS standards. By synthesizing global valve expertise with our pioneering research and development initiatives, we offer a comprehensive range of valves such as Globe Valves, High Pressure Boiler Blow-down Valves, High-performance Butterfly Valves, Angle-regulating Valves, and Eccentric Rotary Valves, among others.
Our product lineup includes V Ball Valves, High Wear-resistant Ball Valves, High Pressure Steam Valves, Micro-flow Control Valves, Self-operated Control Valves, Cryogenic Valves, and more. The driving mechanisms span manual, power-driven, pneumatic, and hydraulic systems. We employ top-quality materials like A216 WCB, A217 WC6/WC9, A351 CF8/CF8M/CF3/CF3M, ensuring specifications from 1/2" to 120", with working pressures ranging from ANSI 150# to 2500#, and operating temperatures stretching from -196ºC to 1100ºC.

SNT Valves, underpinned by advanced production technologies and a robust quality assurance system, are indispensable in the petrochemical, oil, steel & iron, paper manufacturing, and power station sectors. Our esteemed clientele includes industry giants like SINOPEC QILU Branch, SINOPEC Qingdao Branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi and Ningxia branches, SINOPEC Changling Branch, and SINOPEC Jinan Branch, among others.

At SNT, we prioritize our customers' profitability, dedicating ourselves to crafting superior quality and establishing a distinguished brand. Our comprehensive quality assurance and after-sales services ensure that SNT valves consistently deliver excellence, forging prosperous partnerships with all our valued customers.