Advanced Self-Operated Pressure Regulator for Flange and Butt Welding

• Customization: Available
• Temperature: Ordinary Temperature
• Certification: GS, RoHS, CE, ISO9001
• Model NO.: AOC-3111K
• Standard: Standard
• Connection Mode: Flange
• Power: Pneumatic
• Material: Stainless Steel
• Type: Self-Operated
• Connections: Butt Welding/Flange
• 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

 

Product Description

_{Introducing the AOC-3000 Self-Operated Pressure Regulating Valve, a revolutionary product by SNT Machinery (Qingdao) Co., Ltd. This state-of-the-art valve operates independently, requiring no external energy sources, as it harnesses the energy of the regulated medium itself. Perfect for areas devoid of electricity or gas, it epitomizes energy efficiency and cost-effectiveness. The AOC-3000's pressure setting is highly adaptable, allowing for seamless adjustments within a designated range. It offers versatility with three distinctive valve forms designed to cater to diverse process needs: the AOC-3111 single-seated, AOC-3113 sleeve, and AOC-3114 double-seated self-acting pressure regulating valves. Users can tailor their choice based on specific working conditions such as differential pressure, temperature, medium state, and leakage requirements. Additionally, this advanced valve is available in three actuator types-diaphragm (normal and reinforced), piston, and metal diaphragm (bellows)-to suit various process situations. The AOC-3000 boasts fast-opening flow characteristics, ensuring responsive action and exceptional adjustment precision (error ≤10%). Its compact design offers space efficiency compared to traditional heavy hammer type pressure reducing valves, and it is user-friendly for adjustments. This makes the AOC-3000 ideal for broad applications across industries including petroleum, chemical, electric power, metallurgy, food, textiles, machinery manufacturing, and civil construction. It excels in gas, liquid, and steam pressure reduction, stabilization (post-valve adjustment), pressure relief, and pre-valve stabilization, serving as the quintessential solution for modern industry demands.}
 

Actuator Features

 

Figure 1a: This innovative device is engineered to expertly manage the post-control valve pressure with its pressure-closed action mode. Here's how it works: The medium flows seamlessly into the valve body, following the directional arrow, and undergoes efficient throttling by the valve seat and spool. Additionally, in systems where the medium is steam, complemented by a condenser, it is channelled through a pressure tube into the actuator, which precisely engages the diaphragm. This mechanism ensures that the spool adjusts its position dynamically, achieving the dual goals of pressure reduction and stability. Should the pressure after the valve rise, the diaphragm experiences increased force, compressing the spring and driving the spool to constrict the valve opening until the desired pressure is attained. Conversely, a decrease in downstream pressure results in diminished diaphragm force, enabling the spring's reaction force to expand the valve opening, restoring pressure to the set value.

 

Figure 1b: This regulator is adept at controlling the pressure ahead of the valve, operating as a pressure-open type. The action principle is as follows: The medium enters the valve body as indicated by the arrow, undergoing precise throttling by the valve seat and spool. In applications with steam and a condenser, the medium is directed through a pressure tube to the actuator, engaging the diaphragm. This results in a precise spool displacement, fulfilling the objectives of pressure relief and stabilization. An increase in pre-valve pressure augments the diaphragm force, compressing the spring and driving the spool to expand the valve opening until pressure descends to the set parameter. If pre-valve pressure decreases, the diaphragm force reduces, prompting the spring's reactive force to drive the spool, minimizing the valve opening to elevate pressure to the set value. In circumstances where pre-valve pressure is below the set threshold, the valve remains consistently 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

Mounting Method

 

In the realm of gas or low viscosity liquid media, the AOC-3111 Self-Operated Pressure Regulating Valve by SNT Machinery (Qingdao) Co., Ltd. finds its optimal placement in an upright position on a horizontal pipeline. However, when spatial constraints present themselves, this versatile valve can also be installed upside down or at an angle. Importantly, if the medium's cleanliness is confirmed, the installation of part 3 can be omitted, simplifying the process.

 

For steam or high viscosity liquid media applications, the AOC-3111 Self-Operated Pressure Regulating Valve by SNT Machinery (Qingdao) Co., Ltd. demonstrates its adaptability by being installed upside down on a horizontal pipeline, ensuring efficient operation in diverse conditions.
 

Production application

 

Company Profile

SNT Machinery (Qingdao) Co., Ltd. stands as an illustrious leader in the realm of control valve production, seamlessly blending manufacturing prowess, visionary design, robust sales, and impeccable service under one roof. Strategically nestled in the vibrant city of Qingdao, Shandong province, our expansive 42,000m2 facility boasts state-of-the-art workshops and cutting-edge production equipment. As a beacon of high-tech innovation, we pride ourselves on holding independent intellectual property rights and integrating advanced international management and production methodologies. Our dynamic team comprises over 150 dedicated professionals, with R&D specialists making up 15% and a remarkable 30% holding graduate or higher degrees. Fueled by an exceptional production management team and pioneering research and development, we excel in crafting high-quality valves that serve the petrochemical, oil, and coal chemical sectors. In 2017, our sales soared to nearly 100 billion, a testament to our unwavering commitment to excellence.

SNT has proudly attained the prestigious TS special equipment manufacturing certificate and ISO 9001 certification, alongside acquiring the net qualification certification from industry giants such as SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. Our technological mastery is further validated by a myriad of National Patents. We specialize in designing and manufacturing a comprehensive array of valves compliant with ANSI, API, DIN, BS, and JIS standards. By synergizing the strengths of globally renowned valves with our own innovative research and development, we currently produce a versatile range of valves, including GLOBE, High Pressure Boiler Blow-down Valves, High-performance Butterfly Valves, Angle-regulating Valves, and Eccentric Rotary Valves, along with T Three-eccentric Center Butterfly Valves.
Our product line extends to 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 driving mechanisms encompass manual, power-driven, pneumatic, and hydraulic options. The materials for principal components include A216WCB, A217 WC6/WC9, A351 CF8/CF8M/CF3/CF3M, among others. We offer specifications ranging from 1/2" to 120", with working pressures from ANSI 150# to 2500#, and operating temperatures from -196ºC to 1100ºC.

Leveraging sophisticated production technology, management, and a robust quality assurance system, SNT Valves have earned widespread application in the petrochemical, oil, steel & iron, paper manufacturing, and power station industries. Our esteemed clientele includes industry leaders such as SINOPEC QILU branch, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi branch, and PETROCHINA Ningxia branch, among others.

At SNT, we prioritize the profitability and satisfaction of our users, dedicating ourselves to crafting a brand synonymous with outstanding quality. Our unrivaled quality assurance and comprehensive after-sales services ensure that SNT valves foster prosperity in collaboration with all our valued customers.