Robust Self-Operated Pressure Regulator for Industrial Control Valves with Carbon Steel Materials

• 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-an innovative executive product that masterfully balances technology and energy efficiency by harnessing the inherent energy of the medium it regulates, eliminating the need for any external power sources like electricity or gas. This valve is an epitome of energy conservation and is perfectly suited for use in environments lacking external energy. Notably, the valve's pressure setting can be seamlessly adjusted within a specific range, offering unparalleled flexibility. Designed to cater to a wide array of industrial requirements, the AOC-3000 comes in three distinct valve configurations: the AOC-3111, a single-seated self-acting pressure regulating valve; the AOC-3113, a sleeve self-acting pressure regulating valve; and the AOC-3114, a double-seated self-acting pressure regulating valve. This diversity ensures that users can select the perfect match for their specific working conditions, considering factors like differential pressure, temperature, medium state, and leakage constraints. Furthermore, the AOC-3000 offers three types of actuators tailored for various process scenarios: the standard and reinforced diaphragm, the robust piston, and the versatile metal diaphragm (bellows). Enhanced with fast-opening flow characteristics, this valve delivers exceptionally sensitive action and boasts high adjustment precision, with an error margin of just ≤10%. Compact yet powerful, it occupies minimal space compared to the bulkier heavy hammer-type pressure reducing valves. With ease of adjustment and a design that supports extensive applications, the AOC-3000 is the preferred choice across sectors such as petroleum, chemical, electric power, metallurgy, food, light textile, and machinery manufacturing. Its proficiency in managing gas, liquid, and steam pressure makes it indispensable for tasks like pressure reduction, stabilization, relief, and more in both post-valve and pre-valve settings, securing its place as a vital component in civil construction and beyond.}
 

Actuator Features

 

Figure 1a, This advanced mechanism is specifically engineered to regulate the post-control valve pressure with utmost precision. The valve operates on a pressure-closed model. Here's how it functions: The medium travels into the valve body following the direction of the arrow, then undergoes meticulous throttling before being discharged via the valve seat and spool. In another pathway, the medium, when combined with steam and a condenser, is channeled through the pressure tube into the actuator, exerting its influence on the diaphragm. This interaction prompts the spool to shift correspondingly, elegantly achieving pressure reduction and stabilization. If the post-valve pressure escalates, the diaphragm exerts more force, compressing the spring and guiding the spool to narrow the valve opening, restoring the pressure to its intended setting. Conversely, if the pressure wanes, the diaphragm's force diminishes, and the spring's reactive force prompts the spool to expand the valve opening, elevating the pressure to the designated level.

 

Figure 1b, This sophisticated regulator is crafted to expertly manage the pressure preceding the valve, operating on a pressure-open model. The operational principle is as follows: The medium enters the valve body in the directed path of the arrow, then undergoes controlled throttling before it is emitted through the valve seat and spool. In a separate route, the medium, enhanced with steam plus a condenser, is conveyed through the pressure tube into the actuator to engage with the diaphragm. This interaction causes a precise displacement of the spool, thus facilitating controlled pressure relief and stabilization. When the pre-valve pressure intensifies, the diaphragm's force increases, compressing the spring and prompting the spool to widen the valve opening, ensuring the pressure returns to its preset level. Alternatively, if the pressure decreases, the reduced force on the diaphragm and the spring's reactive force collaboratively drive the spool, narrowing the valve opening until the pressure reinstates to its target. Should the pre-valve pressure fall below the set benchmark, the valve remains sealed, ensuring optimal control.
 

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 optimal performance in gas or low viscosity liquid environments, the AOC-3111 type self-operated pressure regulating valve from SNT Machinery (Qingdao) Co., Ltd. should ideally be mounted upright on a horizontal pipeline. However, flexibility is key; when spatial constraints arise, this robust valve accommodates by allowing for an inverted or diagonal installation. Notably, part 3 installation can be omitted when the medium is confirmed to be clean, ensuring a seamless and efficient setup.

 

In applications involving steam or high viscosity liquids, the AOC-3111 type self-operated pressure regulating valve demonstrates its adaptability by being typically installed upside down on a horizontal pipeline. This configuration, expertly crafted by SNT Machinery (Qingdao) Co., Ltd., ensures that the valve delivers consistent and reliable performance in more challenging media environments.
 

Production application

 

Company Profile

SNT Machinery (Qingdao) Co., Ltd is a distinguished producer of control valves, seamlessly integrating manufacturing, design, sales, and service under one esteemed roof. From its inception with a robust vision, SNT rapidly developed, situated in the vibrant city of Qingdao, Shandong province, covering an expansive 42,000m2. Our state-of-the-art facilities boast modern workshops and cutting-edge production equipment. As a high-tech enterprise, we possess independent intellectual property rights and have infused imported advanced management and production expertise into our operations. With a dedicated workforce exceeding 150 professionals, 15% are R&D specialists and 30% hold graduate or higher degrees. Our success is driven by an exceptional production management team and a forward-thinking technology research and development division. We pride ourselves on producing vast quantities of high-quality valves that are pivotal in petrochemical, oil, and coal chemical industries. Our sales value reached an impressive 100 billion in 2017.

SNT proudly holds the TS special equipment manufacturing certificate and ISO 9001 accreditation, and has earned net qualification certificates from SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. Our innovations have been recognized with numerous national patents. We design and manufacture a comprehensive range of valves, adhering to ANSI, API, DIN, BS, and JIS standards. By harnessing the strengths of renowned global valve designs alongside our proprietary research and development, SNT excels in producing an 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 impressive valve lineup also features V Ball Valves, High Wear-resistant Ball Valves, High Pressure Steam Valves, Micro-flow Control Valves, Self-operated Control Valves, Cryogenic Valves, etc. Our driving mechanisms encompass manual operation, power-driven, pneumatic, and hydraulic drives. The primary materials used are A216WCB, A217 WC6/WC9, A351 CF8/CF8M/CF3/CF3M, among others. Specifications range from 1/2" to 120", with working pressures from ANSI 150# to 2500#, and they effectively operate in temperatures spanning -196ºC to 1100ºC.

Backed by cutting-edge production technology management and a stringent quality assurance system, SNT Valves have found widespread application across diverse sectors including petrochemical, oil, steel, iron, paper manufacturing, and power station industries. Our esteemed clientele includes branches of SINOPEC, CNOOC, and PETROCHINA, such as SINOPEC QILU Branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi Branch, PETROCHINA Ningxia Branch, and many others.

Our unwavering commitment prioritizes user profitability, dedicating ourselves to establishing unparalleled quality and a reputable brand. Our impeccable quality assurance and comprehensive after-sales support systems ensure that SNT Valves stand shoulder to shoulder with all our valued customers, fostering shared success and prosperity.