Self-Operated Pressure Regulator Featuring A216 Wcb and CF8m Connections

• 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 those seeking exceptional performance, the AOC-3111 type self-operated pressure regulating valve is your ultimate choice when dealing with gas or low viscosity liquid media. Ideally, this valve should be mounted upright on a horizontal pipe, ensuring optimal efficiency and operation. However, should the space constraints challenge this ideal position, rest assured, as it can be mounted upside down or diagonally with equal effectiveness. Please note, when the medium is verified to be clean, part 3 installation becomes unnecessary, thereby simplifying the setup process.

 

In applications involving steam or high viscosity liquid media, the AOC-3111 type self-operated pressure regulating valve demonstrates superior adaptability by being installed upside down on a horizontal pipe. This configuration allows for maximum control and precision in regulating pressure, catering specifically to the unique demands of such challenging media environments.

 

Product Description

_{The AOC-3000 Self-Operated Pressure Regulating Valve is a cutting-edge, executive-level innovation that ingeniously harnesses the power of the regulated medium's inherent energy, eliminating the need for any external energy sources. This remarkable valve is designed to excel in environments devoid of electricity or gas, making it an epitome of energy efficiency. Its pressure setting is incredibly versatile, offering arbitrary adjustments within a predefined range to suit your precise needs. The AOC-3000 sets itself apart with three distinct valve designs tailored for diverse process requirements: the AOC-3111, a single-seated marvel of self-acting precision; the AOC-3113, featuring a sophisticated sleeve design; and the AOC-3114, a double-seated variant, ensuring optimal performance across varying conditions such as differential pressure, temperature, and medium state, all while adhering to stringent leakage standards. Furthermore, this versatile regulator offers three actuator options, perfectly accommodating a wide array of process scenarios: the standard and reinforced diaphragm actuators, the robust piston actuator, and the advanced metal diaphragm (bellows) actuator. Each ensures rapid response and unparalleled adjustment accuracy (error ≤10%). Occupying minimal space compared to traditional heavy hammer-type pressure reducing valves, the AOC-3000 is celebrated for its ease of adjustment. It finds its indispensable place across an extensive range of industries, including petroleum, chemical, electric power, metallurgy, food, light textile, machinery manufacturing, and civil construction. Whether for gas, liquid, or steam, it flawlessly handles pressure reduction and stabilization post-valve, as well as pressure relief and stabilization pre-valve, solidifying its status as an industry-leading solution.}
 

Actuator Features

 

Figure 1a showcases the sophisticated design used to masterfully control the post-control valve pressure regulator. This advanced mechanism operates in a pressure-closed mode. Here's how it works: the medium seamlessly enters the valve body, following the arrow's direction. After a meticulous throttling process through the valve seat and spool, the medium then journeys via the pressure tube (with a condenser for steam mediums) into the actuator, engaging the diaphragm. This interaction prompts the spool to shift accordingly, achieving precision in pressure reduction and stabilization. Should the pressure beyond the valve exceed optimal levels, the diaphragm experiences increased force, compressing the spring and guiding the spool to reduce valve opening until harmony is restored at the set pressure. Conversely, if pressure wanes, the diaphragm's force diminishes, prompting the spring's counteraction to drive the spool, thus increasing valve opening until equilibrium is reached at the set pressure.

 

Figure 1b illustrates a regulator crafted for optimal control of pressure before the valve, operating in a pressure-open mode. This design allows the medium to enter the valve body fluidly, following the arrow's guidance, and then be throttled through the valve seat and spool. Meanwhile, a separate path through the pressure tube (paired with a condenser when steam is the medium) channels into the actuator, activating the diaphragm. This dynamic interaction causes the spool to move, achieving effective pressure relief and stabilization. When pressure before the valve surges, the diaphragm feels intensified force, compressing the spring and expanding the valve opening until pressure subsides to the set level. If the pressure dwindles, the diaphragm's force reduces, prompting the spring's reactive force to drive the spool, thus narrowing the valve opening until the desired pressure level is achieved. Notably, when pre-valve pressure falls below the target, the valve remains closed, ensuring stability.
 

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 leading innovator and manufacturer of control valves, seamlessly integrating manufacturing, design, sales, and service into a cohesive operation. With a strategically high starting point for rapid advancement, SNT is nestled in the vibrant city of Qingdao, Shandong Province, sprawling over an impressive 42,000 square meters. Our facilities boast state-of-the-art workshops and cutting-edge production equipment. As a high-tech enterprise, we pride ourselves on possessing independent intellectual property rights and harnessing advanced international management and production expertise. Our dedicated workforce exceeds 150 skilled employees, with 15% specializing in R&D and 30% holding graduate or higher degrees. Our commitment to quality production management and innovative research is evident in the large-scale production of superior valves tailored for the petrochemical, oil, and coal chemical industries, achieving sales nearing a remarkable 100 billion in 2017.

SNT proudly holds the TS Special Equipment Manufacturing Certificate and ISO 9001 certification, along with the esteemed net qualification certificate from SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. Our pioneering technologies have earned us numerous National Patents. We excel in designing and manufacturing a comprehensive range of valves, adhering to ANSI, API, DIN, BS, and JIS standards. By amalgamating the strengths of globally renowned valves with our proprietary R&D, we have expanded our capabilities to produce an extensive array of valves, including GLOBE, High-Pressure Boiler Blow-down Valves, High-performance Butterfly Valves, Angle-regulating Valves, and Eccentric Rotary Valves.
Our diverse offering 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, Cryogenic Valves, and more. We accommodate various driving forms, such as manual operation, power-driven, pneumatic, and hydraulic mechanisms. Our main components are crafted from elite materials like A216WCB, A217 WC6/WC9, A351 CF8/CF8M/CF3/CF3M, ensuring durability and excellence. Specifications range from 1/2" to 120", catering to working pressures of ANSI 150# to 2500# and temperatures spanning -196ºC to 1100ºC.

With a foundation built upon advanced production technology management and a robust quality assurance system, SNT Valves have become integral to petrochemical, oil, steel & iron, paper manufacturing, and power station industries. We are honored to serve esteemed clients 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.

Prioritizing our users' prosperity, we are wholeheartedly devoted to establishing superlative quality and an esteemed brand reputation. Our impeccable quality assurance and unparalleled after-sales systems ensure that SNT valves stand united with our customers to foster shared success and prosperity.