Self-Operated Pressure Regulator with Butt Welding Connections and A216 Wcb

• 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 media, the AOC-3111 type self-operated pressure regulating valve should ideally be mounted vertically on a horizontal pipeline. However, if space constraints arise, alternative orientations such as upside down or diagonal mounting can be utilized. In situations where the medium is confirmed to be clean, the installation of part 3 becomes optional, simplifying the setup.

 

In applications involving steam or high viscosity liquid media, the preferred installation method for the AOC-3111 type self-operated pressure regulating valve is to position it upside down on a horizontal pipe. This orientation ensures optimal performance and efficiency in such demanding environments.

 

Product Description

_{Introducing the AOC-3000 Self-Operated Pressure Regulating Valve, a groundbreaking innovation by SNT Machinery (Qingdao) Co., Ltd., designed to revolutionize how we manage pressure regulation. This executive marvel operates independently, eliminating the need for external energy sources and utilizing the power of the regulated medium itself. Its most remarkable feature is its ability to function efficiently in environments devoid of electricity or gas, all while optimizing energy use. It offers adjustable pressure settings within flexible ranges, adapting seamlessly to your specific requirements. Choose from three sophisticated valve designs to match your unique process needs: the precise AOC-3111 single-seated valve, the versatile AOC-3113 sleeve valve, or the robust AOC-3114 double-seated valve. Tailor your selection based on working conditions like differential pressure, temperature, and medium state, along with specific leakage demands. Additionally, the AOC-3000 series offers three actuator types: the reliable diaphragm (available in normal and reinforced versions), the efficient piston, and the durable metal diaphragm (bellows). Featuring fast-opening flow characteristics, this valve ensures sensitive responses and high adjustment precision, with a minimal error margin of ≤10%, occupying significantly less space compared to traditional heavy hammer pressure reducing valves. Its ease of adjustment makes it an indispensable tool across diverse industries, including petroleum, chemical, electric power, metallurgy, food, light textile, machinery manufacturing, civil construction, and more. Whether managing gas, liquid, or steam, the AOC-3000 excels in pressure reduction, stabilization, relief, and beyond, solidifying its place as the ultimate solution for your pressure management needs.}
 

Actuator Features

 

Figure 1a: This remarkable pressure-closed valve regulator is designed to impeccably manage post-control valve pressure. Here's how it works: the medium enters the valve body, flowing along the arrow's path. It then undergoes precise throttling, flowing out through the valve seat and spool. Meanwhile, an alternate path via the pressure tube (when handling steam, including a condenser) guides the medium into the actuator, influencing the diaphragm. This interaction results in the spool making a precise displacement, achieving desired pressure reduction and stabilization. When the valve's downstream pressure escalates, the diaphragm's force intensifies, compressing the spring and urging the spool to minimize the valve opening until it returns to its set pressure level. Conversely, if the downstream pressure diminishes, the diaphragm experiences reduced force; the spring's reaction drives the spool to widen the valve, restoring pressure to its set value.

 

Figure 1b: This advanced regulator is adept at controlling the upstream pressure with a pressure-open valve action mode. The operational process is as follows: the medium navigates into the valve body following the arrow's direction, then exits post-throttling through the valve seat and spool. A secondary route via the pressure tube (applicable when the medium is steam with an added condenser) introduces the medium into the actuator, affecting the diaphragm. This interaction prompts the spool's displacement, ensuring efficient pressure relief and stabilization. Should the upstream pressure escalate, the diaphragm's force heightens, compressing the spring, thus enlarging the valve's opening until the pressure subsides to the desired set level. Should the upstream pressure diminish, the diaphragm's force slackens, and the spring's reaction propels the spool to restrict the valve opening, reinstating the pressure to its set level. If the upstream pressure falls below the set threshold, the valve remains securely closed.
 

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 tall as a leading producer of control valves, skillfully integrating manufacturing, design, sales, and services under one roof. With a foundation set for exceptional growth, SNT is strategically located in the vibrant city of Qingdao, Shandong province, sprawling over an impressive 42,000 square meters. Our state-of-the-art facilities boast cutting-edge workshops and production equipment. As a high-tech enterprise, we pride ourselves on possessing independent intellectual property rights and embracing advanced global management and production methodologies. Our dynamic team comprises over 150 dedicated professionals, with 15% specializing in R&D and 30% holding graduate or higher degrees. With a relentless commitment to quality and innovation, we produce vast quantities of superior valves for the petrochemical, oil, and coal chemical sectors. Achieving a remarkable sales value nearing 100 billion in 2017 underscores our significant impact on the industry.

SNT has earned the prestigious TS special equipment manufacturing certificate, alongside ISO 9001 accreditation. Our exceptional standards have garnered us the net qualification certificates from SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. We proudly hold numerous National Patents for our groundbreaking technologies. Our expertise enables us to design and manufacture a comprehensive range of valves adhering to ANSI, API, DIN, BS, and JIS standards. By merging global valve innovations with our own research prowess, we produce an extensive variety of valves, including GLOBE, High Pressure Boiler Blow-down Valves, High-performance Butterfly Valves, Angle-regulating Valves, and Eccentric Rotary Valves, among others.
Our valve offerings further extend to 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. Our versatile driving forms encompass manual operation, power-driven, pneumatic, and hydraulic drives. We utilize premium materials such as A216 WCB, A217 WC6/WC9, A351 CF8/CF8M/CF3/CF3M, ensuring reliability and durability. Our specifications range from 1/2" to 120", with working pressures from ANSI 150# to 2500#, and temperatures spanning from -196ºC to 1100ºC.

Leveraging advanced production technologies and a robust quality assurance system, SNT Valves have become integral to industries such as petrochemical, oil, steel & iron, paper manufacturing, and power stations. Our prestigious clientele includes industry giants like SINOPEC QILU, SINOPEC Qingdao, CNOOC Huizhou Refinery, PETROCHINA Guangxi, PETROCHINA Ningxia, SINOPEC Changling, and many more, all of whom trust us to deliver excellence consistently.

At SNT Machinery, our customers' success is our foremost priority. We are passionately committed to building a legacy of superior quality and a distinguished brand. With a flawless quality assurance and robust after-sales support system, SNT valves thrive in partnership with our customers, driving collective prosperity and groundbreaking achievements.