Compact Self-Operated Pressure Regulator with A351 CF8 and CF3m 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 from SNT Machinery (Qingdao) Co., Ltd. is ideally positioned upright on a horizontal pipe. This configuration ensures precision and efficiency. However, if spatial constraints are present, installation can be adjusted to an upside-down or diagonal position. Rest assured that when the medium is confirmed to be clean, the installation of part 3 is not necessary, streamlining your setup process.

 

In applications involving steam or high viscosity liquid media, the AOC-3111 type self-operated pressure regulating valve should typically be mounted upside down on a horizontal pipe. This orientation supports optimal flow characteristics and enhances the valve's regulation capabilities, ensuring that your system operates smoothly and efficiently.

 

Product Description

_{Introducing the AOC-3000 Self-Operated Pressure Regulating Valve: a cutting-edge innovation by SNT Machinery (Qingdao) Co., Ltd. This executive marvel requires no external energy, utilizing the very energy of the regulated medium for automatic regulation. Its standout feature is its unparalleled adaptability in environments devoid of electricity or gas, all while championing energy efficiency. Seamlessly adjustable pressure settings cater to a diverse range of process requirements. Tailored for various industrial applications, the AOC-3000 offers three distinct valve forms: - AOC-3111: Single-Seated for precise regulation - AOC-3113: Sleeve Self-Acting for enhanced versatility - AOC-3114: Double-Seated for superior performance Each form is meticulously designed to meet specific operational conditions, including differential pressure, temperature variations, medium states, and precise leakage demands. Customization extends further with three actuator types: - Diaphragm (normal and reinforced) for robust performance - Piston for durable, consistent operation - Metal Diaphragm (bellows) for enhanced flexibility The AOC-3000 excels with fast-opening flow characteristics, ensuring rapid response and impressive adjustment accuracy (error ≤10%). Its compact design significantly reduces spatial footprint compared to traditional heavy hammer pressure reducing valves, simplifying installation and adjustment. This versatile regulator finds wide application across numerous industries such as petroleum, chemical, electric power, metallurgy, food processing, textiles, machinery manufacturing, and civil construction. It adeptly manages gas, liquid, and steam pressure reduction, post-valve pressure stabilization, pressure relief, and pre-valve pressure stabilization, ensuring optimal performance and reliability in every scenario.}
 

Actuator Features

 

Figure 1a: This diagram illustrates the sophisticated system used to control the post-control valve pressure regulator, specifically designed as a pressure-closed type. Here's how it functions: As the medium gracefully flows into the valve body following the arrow's direction, it elegantly exits through the valve seat and spool after precise throttling. Additionally, the medium is channeled via the pressure tube into the actuator, where it influences the diaphragm. For steam mediums, this includes a condenser. This influence causes the spool to adjust its position, expertly achieving pressure reduction and stabilization. Should the pressure after the valve increase, the diaphragm feels a greater force, compressing the spring. This action prompts the spool to reduce the valve's opening, balancing the pressure to the desired set value. Conversely, if the post-valve pressure decreases, the diaphragm's force diminishes, and the spring's counter-force deftly prompts the spool to expand the valve opening until the pressure escalates back to the set threshold.

 

Figure 1b: This diagram delineates the regulator's role in managing pressure in front of the valve, operating as a pressure-open type. The operational mechanics are as follows: The medium streams into the valve body from the directional arrow, proceeding through the valve seat and spool after controlled throttling. Meanwhile, the medium is directed via the pressure tube into the actuator, impacting the diaphragm-steam mediums include a condenser in this process. This impact causes the spool to undergo necessary displacement, facilitating pressure relief and stabilization. An increase in pre-valve pressure elevates diaphragm force, compressing the spring, which propels the spool to widen the valve's aperture until equilibrium is restored at the set pressure value. Conversely, a reduction in pre-valve pressure decreases diaphragm influence, prompting the spring's counteraction to narrow the valve opening, ensuring the pressure rises to the set value. If the pre-valve pressure descends below the set threshold, the valve remains in a closed state.
 

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 distinguished leader in the realm of control valves, seamlessly integrating manufacturing, design, sales, and service into one cohesive entity. Embarking on a journey of excellence with a high starting point and rapid growth trajectory, SNT is strategically located in Qingdao, Shandong province, sprawling over an impressive 42,000m2. Our state-of-the-art workshops and cutting-edge production facilities embody our commitment to innovation and quality. As a high-tech enterprise holding independent intellectual property rights, we blend cutting-edge management with advanced production expertise. Our talented team comprises over 150 dedicated professionals, with 15% specializing in research and development, and an impressive 30% holding graduate or higher degrees. Through a potent combination of a high-caliber production management team and groundbreaking technological innovation, we have positioned ourselves as purveyors of large volumes of premium valves, serving the petrochemical, oil, and coal chemical industries. Our sales soared to nearly 100 billion in the year 2017, a testament to our unwavering dedication to quality and excellence.

SNT Machinery proudly holds the prestigious TS special equipment manufacturing certificate and ISO 9001 certification, and has earned recognition with the net qualification certificates from industry giants such as SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. Our innovative prowess is further demonstrated by our collection of National Patents across a multitude of technologies. Mastering the art of valve design and manufacturing, we adhere to global standards including ANSI, API, DIN, BS, and JIS. By harnessing the strengths of renowned valves worldwide and harnessing our prowess in independent research and development, we have expanded our manufacturing capabilities to encompass a comprehensive range of valves, including GLOBE, High Pressure Boiler Blow-down Valves, High-performance Butterfly Valves, Angle-regulating Valves, and Eccentric Rotary Valves, among others.
Our extensive valve portfolio further includes 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, and Cryogenic Valves, to name a few. With versatile driving forms such as manual operation, power-driven, pneumatic, and hydraulic drive, our valve solutions are designed to cater to diverse industrial needs. The robust materials used for main components include A216WCB, A217 WC6/WC9, A351 CF8/CF8M/CF3/CF3M, ensuring longevity and performance. Our specifications range from 1/2" to 120", with working pressures from ANSI 150# to 2500#, and they withstand temperatures from a frigid -196ºC to a scorching 1100ºC.

Leveraging advanced production technology management and a rigorous quality assurance system, SNT Valves have become a trusted choice across various industries, including petrochemical, oil, steel & iron, paper manufacturing, and power stations. Our esteemed clientele comprises SINOPEC QILU branch, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi branch, PETROCHINA Ningxia branch, and SINOPEC Changling branch, Jinan branch, among others. Our valves are a symbol of reliability and excellence, powering industries and driving progress.

At SNT, we prioritize our users' profits, relentlessly dedicating ourselves to crafting an unparalleled quality and esteemed brand reputation. Our impeccable quality assurance and robust after-sales systems ensure that SNT valves forge enduring partnerships with all our customers, paving the path to shared prosperity and success.