Advanced Self-Operated Pressure Regulator with Butt Welding and CF8m Materials

• Customization: Available
• Temperature: Ordinary Temperature
• Certification: GS, RoHS, CE, ISO9001
• Model NO.: AOC-3111B
• Media: Gas, Oil, Water, Acid
• 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 media, the AOC-3111 self-operated pressure regulating valve should ideally be positioned upright on a horizontal pipe. However, if space constraints arise, an inverted or diagonal installation is permissible. (Note: If the medium is verified to be clean, component 3 may be omitted, ensuring streamlined efficiency.)

 

In scenarios involving steam or high-viscosity liquid media, the AOC-3111 self-operated pressure regulating valve is best installed in an inverted position on a horizontal pipe. This configuration maximizes operational effectiveness and ensures reliability.

 

Product Description

_{Introducing the AOC-3000 Self-Operated Pressure Regulating Valve, a groundbreaking innovation by SNT Machinery (Qingdao) Co., Ltd. This remarkable piece of engineering eliminates the need for external energy sources, as it smartly harnesses the power of the medium it regulates. Standout in environments devoid of electricity or gas, it excels at conserving energy while providing you with adjustable pressure settings within a broad range. Tailored for diverse industrial processes, the AOC-3000 is available in three distinct forms: the AOC-3111 single-seated model, the AOC-3113 sleeve version, and the AOC-3114 double-seated variant. Each is designed to meet the specific demands of varying working conditions, such as differential pressure, temperature, and medium state, all while addressing your leakage requirements. Furthermore, customization is at the core with three actuator types to choose from: the reliable diaphragm (available in both regular and reinforced versions), the durable piston, and the robust metal diaphragm (bellows). With its fast-opening flow characteristics, this valve ensures sensitive action and unparalleled adjustment precision, boasting an error margin of just ≤10%. Compact and efficient, the AOC-3000 occupies minimal space compared to its counterparts like the heavy hammer type pressure reducing valve. Its versatility and ease of adjustment make it an indispensable asset across a multitude of industries, including petroleum, chemical, electric power, metallurgy, food, light textile, machinery manufacturing, and civil construction. Whether your need is pressure reduction, stabilization after the valve, relief, or stabilization before the valve, the AOC-3000 is your trusted partner for managing gas, liquid, and steam pressure with confidence and precision.}
 

Actuator Features

 

Figure 1a: This sophisticated control mechanism is designed to regulate the post-control valve pressure regulator with a pressure-closed action mode. Here's how it functions: As the medium journeys into the valve body, following the arrow's direction, it navigates through throttling to be released by the valve seat and spool. Additionally, it channels through the pressure tube (incorporating a condenser when the medium is steam) into the actuator, energizing the diaphragm. This results in precise spool displacement, facilitating pressure reduction and stabilization. When the downstream pressure escalates, the diaphragm's force intensifies, compressing the spring and commanding the spool, thereby shrinking the valve opening until the pressure lowers to the desired benchmark. Conversely, if the downstream pressure drops, the diaphragm's force diminishes. The spring's reaction force then guides the spool to widen the valve opening, restoring the pressure to its optimal setting.

 

Figure 1b: This regulator expertly manages the pressure in front of the valve, operating with a pressure-open action mode. Here's the detailed principle: The medium, guided by the arrow's direction, enters the valve body, proceeding through throttling to be emitted by the valve seat and spool. Simultaneously, the pressure tube (with a condenser when the medium is steam) channels into the actuator, engaging the diaphragm. This triggers the spool's precise displacement, achieving effective pressure relief and stabilization. Should the upstream pressure escalate, the diaphragm's force strengthens, compressing the spring and prompting the spool to expand the valve opening until the pressure subsides to the preset level. Similarly, if the upstream pressure diminishes, the diaphragm's force weakens, activating the spring's counterforce to adjust the spool and curtail the valve opening, ensuring the pressure heightens to the intended degree. If the upstream pressure is below the set threshold, the valve remains closed, preserving optimal conditions.
 

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 beacon of innovation in the realm of control valves. Seamlessly integrating manufacturing, design, sales, and service, we are positioned for rapid advancement from a robust foundation. Nestled in the industrious hub of Qingdao, Shandong province, our state-of-the-art facility spans an impressive 42,000 square meters. As a recognized high-tech enterprise, we take pride in owning independent intellectual property rights, bolstered by imported cutting-edge management and production methodologies. Our dynamic team comprises over 150 dedicated professionals, with 15% specializing in R&D and a remarkable 30% holding graduate or higher degrees. Leveraging our elite production management team and pioneering technology research, we deliver a substantial volume of superior quality valves essential for petrochemical, oil, and coal chemical industries. Our sales soared to nearly 100 billion in 2017, reflecting our market impact and commitment to excellence.

SNT proudly holds the TS special equipment manufacturing certificate and ISO 9001 certification, further endorsed by the network qualification certificates from industry giants like SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. Our innovative spirit is evident through our numerous National Patents in cutting-edge technologies. Our design and manufacturing capabilities extend across all valve series, adhering to ANSI, API, DIN, BS, and JIS standards. By synergizing the strengths of world-renowned valves with our independent R&D, we now expertly produce 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.
We also manufacture 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. Our diverse driving forms include manual operation, power-driven, pneumatic, and hydraulic drives. Main components are crafted from A216 WCB, A217 WC6/WC9, A351 CF8/CF8M/CF3/CF3M, and more. Specifications span from 1/2" to 120", with working pressures ranging from ANSI 150# to 2500#, and operational temperatures from as low as -196ºC to as high as 1100ºC.

Our SNT Valves, underpinned by advanced production technology management and a rigorous quality assurance system, are extensively employed across industries such as petrochemical, oil, steel & iron, paper manufacturing, and power stations. Esteemed customers include SINOPEC QILU branch, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi branch, PETROCHINA Ningxia branch, SINOPEC Qingdao Refinery, and many more, underscoring our widespread industry trust and collaboration.

At SNT, our unwavering commitment to prioritizing user profits fuels our dedication to crafting unparalleled quality and establishing a reputable brand. Our impeccable quality assurance and after-sales support systems ensure that SNT valves forge enduring partnerships with our valued customers, driving mutual prosperity and success.