Self-Operated Pressure Regulator with A351 CF3 and Butt Welding Connections

• Customization: Available
• Temperature: Ordinary Temperature
• Certification: GS, RoHS, CE, ISO9001
• Model NO.: AOC-3111B
• Standard: Standard
• Connection Mode: Flange
• Power: Pneumatic
• Type: Self-Operated
• Connections: Butt Welding
• 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

Mounting Method

 

For optimal performance in gas or low-viscosity liquid applications, the AOC-3111 series self-operated pressure regulator is ideally mounted in an upright position on a horizontal pipeline. In cases where space constraints exist, it can be adjusted to an inverted or diagonal position. (Note: If the medium is verified as clean, the installation of part 3 can be omitted.)

 

For steam or high-viscosity liquid applications, the AOC-3111 series self-operated pressure regulator should typically be mounted in an inverted position on a horizontal pipeline to ensure effective regulation and smooth operation.

 

Product Description

_{Introducing the AOC-3000 self-operated pressure regulating valve, a pioneering solution from SNT Machinery (Qingdao) Co., Ltd. This innovative product functions without the need for any external energy, harnessing the power of the medium's own energy for automatic regulation. Ideal for environments lacking electricity or gas, this valve is an outstanding energy-saving choice. Its pressure setting can be effortlessly adjusted within a specified range to meet diverse needs. The AOC-3000 series is versatile, offering three distinct valve configurations tailored to various processing demands: 1. AOC-3111: A single-seated self-acting pressure regulating valve for precise control. 2. AOC-3113: A sleeve self-acting pressure regulating valve designed for enhanced stability. 3. AOC-3114: A double-seated self-acting pressure regulating valve for dual-layer protection. Selection is made easy based on working conditions, including differential pressure, temperature, medium state, and leakage requirements. To further customize performance, the AOC-3000 series features three types of actuators, each suited to specific process scenarios: - Diaphragm (standard and reinforced options for varied needs) - Piston (for robust performance) - Metal diaphragm or bellows (for flexible applications) Engineered with fast-opening flow characteristics, these valves ensure precise and sensitive action, achieving an adjustment accuracy with an error margin of just ≤10%. Compact in design, they occupy minimal space compared to traditional heavy hammer-type pressure reducing valves, facilitating easier adjustments. Their applications span across a multitude of industries, including petroleum, chemical, electric power, metallurgy, food processing, textiles, machinery manufacturing, and civil construction. They are indispensable for gas, liquid, and steam pressure reduction, stabilization (both pre- and post-valve), and pressure relief, making them a vital component in modern equipment.}
 

Actuator Features

 

Figure 1a illustrates the masterful design of our pressure-closed type post-control valve pressure regulator. Its operation is ingeniously simple yet remarkably effective: as the medium flows into the valve body following the indicated arrow, it is expertly throttled and guided through the valve seat and spool. Simultaneously, through the pressure tube (and with a condenser when handling steam), the medium is directed into the actuator to engage the diaphragm. This intricate interaction causes the spool to move accordingly, brilliantly achieving pressure reduction and stabilization. Should the downstream pressure rise, the diaphragm's force increases, compressing the spring and adjusting the spool to decrease the valve opening. This elegant mechanism continues until the pressure aligns with the desired setpoint. Conversely, if the pressure drops, the diaphragm's force lessens, allowing the spring's reactive force to precisely adjust the spool, thus widening the valve opening until equilibrium is restored.

 

Figure 1b showcases the sophisticated pressure-open type regulator, crafted to meticulously manage the pressure before the valve. Within this intelligent system, the medium enters the valve body as indicated by the arrow, undergoing careful throttling before emerging through the valve seat and spool. Concurrently, the medium is channeled via the pressure tube (enhanced by a condenser when dealing with steam) into the actuator, engaging the diaphragm. This interaction initiates a precise displacement of the spool, expertly facilitating pressure relief and stabilization. If the upstream pressure rises, the diaphragm's force increases, compressing the spring and prompting the spool to enhance the valve opening until the pressure subsides to the set level. Conversely, should the upstream pressure fall, the diaphragm's force diminishes, and the spring's reactive force adeptly narrows the valve opening, maintaining alignment with the set pressure level. Notably, should the pressure fall below the set threshold, the valve remains securely closed, ensuring optimum safety and 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

 

Production application

 

 

 

Company Profile

SNT Machinery (Qingdao) Co., Ltd. stands as a prestigious manufacturer of control valves, seamlessly integrating manufacturing, design, sales, and service under one roof. Positioned as a high-tech enterprise with a progressive vision, SNT is nestled in the vibrant city of Qingdao, Shandong province, sprawling over an expansive area of 42,000 square meters. Our state-of-the-art workshops and cutting-edge production equipment underscore our commitment to quality. Embracing advanced international management practices and production techniques, SNT proudly holds independent intellectual property rights. Our dedicated workforce of over 150 includes 15% R&D specialists and 30% of personnel with graduate or higher degrees. By leveraging an exceptional production management team and innovative technology, we consistently deliver premium valves for the petrochemical, oil, and coal chemical sectors. This relentless pursuit of excellence resulted in a remarkable sales achievement nearing 100 billion in 2017.

SNT Machinery holds the prestigious TS special equipment manufacturing certificate and ISO 9001 accreditation, coupled with net qualification certificates from industry giants like SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. Our commitment to innovation is further validated by numerous national patents. We offer comprehensive design and manufacturing capabilities for a full spectrum of valves, adhering to rigorous standards such as ANSI, API, DIN, BS, and JIS. Drawing inspiration from globally renowned valves and fueled by independent research initiatives, we craft an extensive array of valves, including GLOBE Valves, High Pressure Boiler Blow-down Valves, High-performance Butterfly Valves, and Angle-regulating Valves to name a few.
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, among others. We offer diverse drive options, including manual operation, power-driven, pneumatic, and hydraulic systems. The main components are fabricated from superior materials such as A216WCB, A217 WC6/WC9, A351 CF8/CF8M/CF3/CF3M, ensuring robust performance. Our valves cater to a vast specification range from 1/2" to 120", with a working pressure between ANSI 150# and 2500#, and operational temperatures spanning from -196ºC to 1100ºC.

Backed by our advanced production technology management and stringent quality assurance systems, SNT valves have earned a prominent place across industries like petrochemical, oil, steel & iron, paper manufacturing, and power stations. Esteemed clientele includes SINOPEC QILU branch, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi and Ningxia branches, among others. Our expansive network continues to grow, reinforcing our reputation for excellence and reliability.

At SNT, we prioritize our customers' prosperity, dedicating ourselves to fostering superior quality and a distinguished brand reputation. Our comprehensive quality assurance and after-sales service systems ensure that SNT valves are synonymous with reliability, forging prosperous partnerships with our valued clients.