Reliable Self-Operated Pressure Regulator in Heavy-Duty Valve 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, a marvel of engineering from SNT Machinery (Qingdao) Co., Ltd. This innovative product is designed to operate independently without relying on external energy sources. It efficiently harnesses the energy of the medium it regulates, making it the ideal choice for locations without electricity or gas, while significantly conserving energy. Its standout feature is the flexible pressure setting, which allows for seamless adjustments within a specific range. The AOC-3000 is tailored to meet diverse industrial needs with three unique valve configurations: the AOC-3111 for single-seated applications, the AOC-3113 for sleeve-seated scenarios, and the AOC-3114 for double-seated requirements. Each variant is crafted to suit specific operational conditions, such as differential pressure, temperature, medium state, and leakage specifications. Furthermore, it offers a selection of actuators, including normal and reinforced diaphragms, piston, and metal diaphragm (bellows) options, to accommodate various process demands. The AOC-3000 excels with its rapid-opening flow characteristics, ensuring precise and responsive regulation with an impressive accuracy of error ≤10%. Its compact design saves valuable space compared to traditional heavy hammer-type pressure reducing valves, and it is remarkably easy to adjust. This versatile valve is extensively utilized across industries such as petroleum, chemical, electric power, metallurgy, food processing, light textiles, machinery manufacturing, civil construction, and more. It is adept at managing gas, liquid, and steam pressure reduction, stabilization for post-valve adjustment, pressure relief, and pre-valve stabilization, making it an indispensable tool for a multitude of applications.}
 

Actuator Features

 

Figure 1a is expertly designed to regulate and maintain post-control valve pressure with a pressure-closed mechanism. Here's how it works: the medium journeys into the valve body, directed by the arrow, and after passing through the valve seat and spool, it undergoes precise throttling. Concurrently, a pressure tube (used with steam plus a condenser) channels the medium into the actuator, advancing to the diaphragm. This sets off a nuanced movement of the spool, achieving seamless pressure reduction and stabilization. Should the pressure past the valve rise, the diaphragm experiences increased force, compressing the spring and propelling the spool to adjust the valve opening, restoring the pressure to its intended setting. Conversely, if the post-valve pressure wanes, the diaphragm force diminishes, and the spring's reactive force compels the spool to widen the valve, reinstating the pressure to the desired level.

 

Figure 1b presents a masterful regulator that governs the pressure preceding the valve, featuring a pressure-open mechanism. The operation unfolds as follows: the medium navigates into the valve body, as indicated by the arrow, proceeding through the valve seat and spool for expert throttling. Meanwhile, the medium, accompanied by steam and a condenser, channels into the actuator's diaphragm via a pressure tube, prompting precise spool displacement for pressure relief and stabilization. When the pre-valve pressure surges, the diaphragm's force intensifies, compressing the spring and expanding the valve opening until the pressure aligns with the set standard. Conversely, a drop in pre-valve pressure lessens diaphragm force, allowing the spring's resilience to drive the spool and constrict the valve opening, reestablishing the pressure to its set benchmark. Should the pre-valve pressure fall below the set threshold, the valve remains firmly closed, ensuring unmatched performance and reliability.
 

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

 

To ensure optimum performance in gas or low-viscosity liquid applications, the AOC-3111 Reliable Self-Operated Pressure Regulator is typically mounted in an upright position on a horizontal pipeline. This standard setup can be adjusted to an upside-down or diagonal installation only if spatial constraints exist. Should the medium be verified as clean, installation of part 3 can be omitted.

 

For steam or high-viscosity liquid applications, the AOC-3111 Reliable Self-Operated Pressure Regulator is expertly installed upside down on a horizontal pipeline. This configuration maximizes functionality and efficiency for more viscous media conditions.
 

Production application

 

Company Profile

SNT Machinery (Qingdao) Co., Ltd. is an esteemed producer of premium control valves, seamlessly integrating manufacturing, design, sales, and services into a single dynamic entity. With a high starting point and rapid development, SNT is strategically located in Qingdao, Shandong Province, spanning an expansive 42,000 square meters. The facility is equipped with state-of-the-art workshops and cutting-edge production equipment. As a high-tech enterprise, SNT boasts independent intellectual property rights and has incorporated advanced management and production expertise. The company employs over 150 dedicated professionals, with 15% committed to research and development, and 30% holding graduate or higher degrees. Driven by a top-tier production management team and pioneering technology development, SNT specializes in producing high-quality valves extensively used in petrochemical, oil, and coal chemical industries. Impressively, SNT achieved a sales milestone of nearly 100 billion in 2017.

SNT proudly holds the TS special equipment manufacturing certificate and ISO 9001 certification. Additionally, it has secured net qualification certifications from industry giants like SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. Our innovation is further underscored by numerous national patents. We expertly design and manufacture an array of valve series adhering to ANSI, API, DIN, BS, and JIS standards. By synthesizing the strengths of globally renowned valves with our independent R&D, we offer a comprehensive range of valves, such as GLOBE, High Pressure Boiler Blow-down Valves, High-performance Butterfly Valves, Angle-regulating Valves, and Eccentric Rotary Valves.
Our diverse valve portfolio includes 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. The driving mechanisms are versatile: manual, power-driven, pneumatic, and hydraulic. The main components are crafted from robust materials such as A216WCB, A217 WC6/WC9, A351 CF8/CF8M/CF3/CF3M. Specifications range from 1/2" to 120", accommodating working pressures of ANSI 150# to 2500# and a temperature spectrum from -196ºC to 1100ºC.

Leveraging advanced production technology management and a robust quality assurance system, SNT valves have earned their place across industries such as petrochemical, oil, steel & iron, paper manufacturing, and power stations. Our prestigious clientele includes SINOPEC QILU branch, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi branch, PETROCHINA Ningxia branch, among others, demonstrating our expansive reach and reliability in the market.

We prioritize our users' profitability, dedicating ourselves to establishing an unmatched standard of excellence and a reputable brand. Our exceptional quality assurance and customer service guarantee that SNT valves not only meet but exceed expectations, fostering enduring partnerships and shared success with all our esteemed customers.