Reliable Self-Operated Pressure Regulator Featuring Zg0cr18ni9ti and CF3m

• 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 gas or low viscosity liquid applications, the AOC-3111 self-operated pressure regulating valve from SNT Machinery (Qingdao) Co., Ltd. is designed for optimal performance when installed upright on horizontal pipes. This ensures efficient operation in standard setups. However, should space constraints arise, the valve's versatile design allows it to be expertly installed either upside down or diagonally, adapting seamlessly to the available space. Notably, for applications involving clean media, the installation of part 3 can be elegantly omitted, simplifying the process without compromising functionality.

 

When dealing with steam or high viscosity liquid media, the AOC-3111 self-operated pressure regulating valve showcases its adaptability by being ideally installed upside down on horizontal pipes. This unique positioning, crafted by the experts at SNT Machinery (Qingdao) Co., Ltd., ensures superior performance and reliability, accommodating the specific demands of such challenging media.

 

Product Description

_{Introducing the AOC-3000 Self-Operated Pressure Regulating Valve, an exceptional product in SNT Machinery's lineup that exemplifies innovation without the need for any external energy sources. This engineering marvel efficiently harnesses the medium's own energy for automatic regulation, making it an ideal choice in environments devoid of electricity or gas, while significantly reducing energy consumption. With precision and flexibility, the pressure setting value can be tailored effortlessly within a specified range to meet diverse application demands. The AOC-3000 series is crafted to perfection with three distinct valve forms, each designed to cater to specific process requirements: AOC-3111 (single-seated), AOC-3113 (sleeve), and AOC-3114 (double-seated). These options empower users to select the most appropriate solution based on working conditions like differential pressure, temperature, and medium state, as well as leakage criteria. For further customization, the AOC-3000 valves come with three actuator types that enhance their versatility across various processes: diaphragm (standard and reinforced), piston, and metal diaphragm (bellows). The AOC-3000 stands out due to its exceptional fast-opening flow characteristics, ensuring sensitive response and high adjustment accuracy with minimal error (≤10%). Compared to traditional heavy hammer type pressure reducing valves, its compact design requires less space and offers easy adjustability. This makes it the product of choice across a multitude of industrial applications, including petroleum, chemical, electric power, metallurgy, food, light textile, machinery manufacturing, and civil construction. It excels in reducing, stabilizing, and relieving pressure for gas, liquid, and steam across various equipment, ensuring optimal performance and efficiency in both post-valve and pre-valve adjustment scenarios.}
 

Actuator Features

 

Figure 1a is an exemplary illustration of a cutting-edge, pressure-closed valve control system. This system excels at regulating downstream pressures, ensuring seamless operation. The process begins as the medium enters the valve body along the direction indicated by the arrow, undergoing precise throttling by the valve seat and spool. A secondary route through the pressure tube (enhanced with a condenser for steam mediums) introduces the medium to the actuator, where it directly influences the diaphragm. This action prompts the spool to make a calculated displacement, achieving optimal pressure reduction and stabilization. When the downstream pressure surges, the resultant force on the diaphragm intensifies, compressing the spring and guiding the spool to diminish the valve opening until equilibrium is restored at the preset pressure level. Conversely, should the downstream pressure dwindle, the diaphragm's force diminishes, allowing the spring's inherent reaction force to propel the spool, enhancing valve opening until the pressure aligns with the desired setting.

 

Figure 1b showcases a regulator designed for masterful control of upstream pressures, operating in a pressure-open mode. The medium embarks on its journey into the valve body from the arrow-marked direction, proceeding through meticulous throttling by the valve seat and spool. Meanwhile, its counterpart path through the pressure tube (coupled with a condenser for steam mediums) channels it into the actuator, impacting the diaphragm. This induces a deliberate spool displacement, facilitating pressure relief and stabilization. An increase in upstream pressure intensifies diaphragm force, compressing the spring and driving the spool to expand the valve's opening until the pressure subsides to the set threshold. Similarly, a drop in upstream pressure reduces the diaphragm's influence, allowing the spring's reactive force to guide the spool, minimizing valve opening until pressure recovers to the set standard. Notably, if upstream pressure falls below the desired set point, the valve remains securely closed, maintaining system integrity.
 

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. is a prestigious powerhouse in the world of control valve production, seamlessly integrating manufacturing, design, sales, and service. With a visionary start and rapid expansion, SNT is strategically situated in Qingdao, Shandong province, sprawling over an impressive 42,000 square meters and boasting a state-of-the-art workshop with cutting-edge production equipment. As a pioneering high-tech enterprise, we proudly hold independent intellectual property rights and leverage superior imported management and production expertise. Our dynamic team surpasses 150 professionals, with a remarkable 15% dedicated to research and development and 30% holding graduate or higher degrees. Driven by an elite production management team and a commitment to innovation, we produce superior quality valves extensively utilized in petrochemical, oil, and coal chemical industries. Our staggering sales value approached 100 billion in the year 2017.

SNT has attained the prestigious TS special equipment manufacturing certificate and the ISO 9001 certification, reinforcing our exceptional standards. Proudly recognized with the net qualification certificate of SINOPEC, CNOOC, PETROCHINA, and SINOCHEM, we have also secured numerous National Patents across various technologies. Our expertise enables us to design and manufacture a comprehensive array of valves in strict adherence to ANSI, API, DIN, BS, and JIS standards. By amalgamating the strengths of globally renowned valves with our pioneering research and development, we have mastered the production of an extensive range 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, V Ball Valves, High Wear-resistant Ball Valves, High Pressure Steam Valves, Micro-flow Control Valves, Self-operated Control Valves, Cryogenic Valves, and more. Our diverse driving forms encompass manual operation, power-driven, pneumatic, and hydraulic drive systems. We utilize top-grade materials such as A216WCB, A217 WC6/WC9, and A351 CF8/CF8M/CF3/CF3M, ranging in specifications from 1/2" to 120", accommodating working pressures from ANSI 150# to 2500#, and suitable for temperatures from -196ºC to 1100ºC.

Harnessing advanced production technology management and a robust quality assurance system, SNT Valves are trusted across a multitude of industries including petrochemical, oil, steel & iron, paper manufacturing, and power stations. Our esteemed clientele features prominent names such as SINOPEC QILU branch, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi branch, PETROCHINA Ningxia branch, SINOPEC Qingdao Refinery, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi branch, PETROCHINA Ningxia branch, SINOPEC Changling branch, and Jinan branch, among others.

At SNT, our clients' success is our paramount priority. We are deeply committed to forging a legacy of unparalleled quality and a trusted brand. Our impeccable quality assurance and dedicated after-sales services ensure that SNT valves not only meet but exceed expectations, fostering a prosperous partnership with our valued customers.