Versatile Self-Operated Pressure Regulator with A351 CF3 Valve Body Options

• 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 media, the AOC-3111 type self-operated pressure regulating valve should ideally stand tall in an upright position on a horizontal pipe, ensuring efficiency and reliability. If spatial constraints challenge this arrangement, it can adapt by being installed upside down or diagonally. Notably, if the medium is verified to be clean, the installation of part 3 might be gracefully omitted, simplifying the setup.

 

In applications involving steam or high-viscosity liquid media, the AOC-3111 type self-operated pressure regulating valve demonstrates its versatility by being adeptly installed upside down on a horizontal pipe, embracing complex conditions with ease.

 

Product Description

_{Introducing the remarkable AOC-3000 Self-Operated Pressure Regulating Valve - a groundbreaking innovation from SNT Machinery (Qingdao) Co., Ltd. This executive marvel functions without the necessity of any external energy sources, utilizing the innate energy of the regulated medium to operate effortlessly. The standout feature of this product is its capability to perform optimally in environments devoid of electricity or gas, providing unparalleled energy savings. Experience the convenience of adjustable pressure settings within a specified range to suit your precise requirements. The AOC-3000 is engineered in three distinct valve configurations to meet the diverse demands of various process scenarios: AOC-3111 (Single-Seated), AOC-3113 (Sleeve), and AOC-3114 (Double-Seated) self-acting pressure regulating valves. Choose the ideal option based on your operational conditions, including differential pressures, temperatures, medium states, and leakage specifications. Moreover, the AOC-3000 series offers three actuator types tailored to specific process needs: Diaphragm (available in normal and reinforced versions), Piston, and Metal Diaphragm (Bellows). Featuring fast-opening flow characteristics, the AOC-3000 ensures sensitive action and exceptional accuracy, with an error margin of merely ≤10%. This compact valve, notably smaller than traditional heavy hammer type pressure reducing valves, is designed for ease of adjustment. Its extensive applicability spans across industries such as petroleum, chemical, electric power, metallurgy, food processing, light textiles, machinery manufacturing, and civil construction. It excels in gas, liquid, and steam pressure reduction, stabilization for post-valve and pre-valve adjustments, pressure relief, and more, making it a quintessential choice for enhancing operational efficiency.}
 

Actuator Features

 

Figure 1a: Unleashing the power of precision control, this diagram illustrates the sophisticated workings of our post-control valve pressure regulator, designed with a pressure-closed action mode. Imagine the medium gracefully flowing into the valve body, guided by the arrow, where it undergoes a meticulous throttling process with the valve seat and spool. As it journeys further, it encounters the pressure tube, which, when complemented with steam and a condenser, channels the medium into the actuator to engage the diaphragm. This delicate process results in a precise displacement of the spool, effectively reducing and stabilizing pressure. Should the pressure rise post-valve, the diaphragm feels the increased force, compressing the spring to drive the spool, reducing the valve's opening until equilibrium is restored. Conversely, if the pressure declines, the force diminishes, allowing the spring's reactive power to widen the valve opening, restoring pressure to its ideal set point.

 

Figure 1b: Delve into the intricate mechanics of the pressure open-type regulator, crafted to masterfully control pre-valve pressure. Here, the medium makes its entrance guided by the arrow, undergoing a refined throttle journey through the valve seat and spool. This precision-engineered route includes the pressure tube, which, when coupled with steam and a condenser, channels the medium to activate the diaphragm within the actuator. This activation induces a precise spool displacement, achieving optimal pressure relief and stabilization. When pressure before the valve surges, the diaphragm's force escalates, compressing the spring and compelling the spool to expand the valve's opening, seamlessly bringing pressure levels back to their set value. Conversely, a pressure drop triggers a reduction in diaphragm force, allowing the spring's reaction to decrease the valve opening, restoring the pressure back to its designated benchmark. In instances where pre-valve pressure is notably low, the valve remains tightly closed, ensuring unwavering 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 leading force in the control valve industry, seamlessly blending manufacturing, design, sales, and service into one formidable operation. With a strategic location in the vibrant city of Qingdao, Shandong Province, SNT boasts a sprawling 42,000m² facility, complete with cutting-edge workshops and state-of-the-art production equipment. As a high-tech enterprise, SNT holds independent intellectual property rights, enhanced by imported advanced management practices. Our dynamic team of over 150 employees includes a talented R&D division, comprising 15% of our workforce, while 30% hold graduate or higher degrees. SNT excels in producing top-tier valves for the petrochemical, oil, and coal chemical sectors, achieving nearly 100 billion in sales by 2017, driven by our commitment to quality and innovation.

SNT proudly holds the TS special equipment manufacturing certificate and ISO 9001 accreditation, alongside prestigious net qualification certificates from SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. Our prowess in innovation is recognized with numerous national patents. We skillfully design and manufacture an extensive range of valves adhering to ANSI, API, DIN, BS, and JIS standards. By merging the benefits of world-renowned valve technologies with our proprietary R&D, SNT produces diverse valve types, such as GLOBE, high-pressure boiler blow-down valves, high-performance butterfly valves, angle-regulating valves, eccentric rotary valves, and three-eccentric center butterfly valves.
Our expansive valve catalog also includes V ball valves, high wear-resistant ball valves, high-pressure steam valves, micro-flow control valves, self-operated control valves, cryogenic valves, and more. We offer a versatile range of operation modes, including manual, power-driven, pneumatic, and hydraulic. Our premium materials, such as A216 WCB, A217 WC6/WC9, and A351 CF8/CF8M/CF3/CF3M, ensure durability and performance. Specifications range from 1/2" to 120", with working pressures from ANSI 150# to 2500# and temperatures from -196ºC to 1100ºC.

SNT valves are trusted across a multitude of industries - petrochemical, oil, steel & iron, paper manufacturing, and power stations. Our esteemed clientele includes SINOPEC QILU and Qingdao branches, CNOOC Huizhou Refinery, PETROCHINA Guangxi and Ningxia branches, and more, highlighting our commitment to excellence and industry-leading performance.

At SNT Machinery, our customer's success is paramount. We are dedicated to building a stellar reputation through exceptional quality and a renowned brand image. Our impeccable quality assurance and robust after-sales support ensure that SNT valves embark on a journey of prosperity alongside our valued clients.