Welded Advanced Self-Operated Pressure Regulator with A351 CF8 Body with ANSI 150-600 for Nominal Pressure

• Customization: Available
• Temperature: Ordinary Temperature
• Certification: GS, RoHS, CE, ISO9001
• Model NO.: AOC-3111K
• Media: Gas, Oil, Water, Acid
• 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 stellar AOC-3000 Self-Operated Pressure Regulating Valve - the epitome of innovation in autonomous regulation technology. This executive marvel operates without the need for any external energy, harnessing the innate energy of the regulated medium itself for seamless operation. A crucial advantage of the AOC-3000 is its versatility, capable of functioning optimally even in environments devoid of electricity or gas, thus championing energy conservation. The pressure setting value is flexible, allowing for customizable adjustments within a specified range to meet diverse requirements. The AOC-3000 is engineered in three distinct valve forms tailored for various process scenarios: AOC-3111, the single-seated variant for straightforward operations; AOC-3113, the sleeve variant for enhanced performance; and AOC-3114, the double-seated variant for robust applications. Users can select the ideal model based on specific working conditions such as differential pressure, temperature, medium state, and leakage criteria. Furthermore, the AOC-3000 series offers three actuator types designed to cater to varied process needs: the resilient diaphragm (available in both standard and reinforced formats), the sturdy piston, and the innovative metal diaphragm (bellows). This self-operated valve boasts fast-opening flow characteristics for rapid response and precise adjustment accuracy (with an error margin of ≤10%). Its compact design, when compared to bulkier alternatives like the heavy hammer-type pressure reducing valve, ensures ease of installation and adjustment. This makes it a preferred choice across a plethora of industries including petroleum, chemical, electric power, metallurgy, food, light textile, machinery manufacturing, and civil construction. It excels in applications involving the reduction, stabilization, and relief of gas, liquid, and steam pressures, both post-valve and pre-valve. Discover unparalleled efficiency and reliability with the AOC-3000, where innovation meets excellence.}
 

Actuator Features

 

Figure 1a showcases a sophisticated pressure control mechanism, expertly designed to manage post-control valve pressure using a pressure-closed operation mode. The operation unfolds as follows: the medium gracefully enters the valve body as directed by the arrow, subsequently flowing through the valve seat and spool after precise throttling. Additionally, via a pressure tube (with steam, a condenser is added), the medium engages the actuator diaphragm. This interaction prompts the spool to undergo a precise displacement, achieving seamless pressure reduction and stabilization. Should the post-valve pressure rise, the diaphragm's force intensifies, compressing the spring and adjusting the spool to reduce valve opening until equilibrium is restored at the set pressure. Conversely, if the post-valve pressure diminishes, the diaphragm's exerted force decreases, allowing the spring's reaction force to maneuver the spool, thereby enlarging the valve opening until the pressure is reinstated to the pre-set level.

 

Figure 1b illustrates the regulation of pre-valve pressure with a pressure-open operation mode. The process is as follows: the medium enters the valve body from the arrow-indicated direction and exits via the valve seat and spool after precise throttling. Moreover, through the pressure tube (when involving steam, a condenser is included), the medium influences the actuator diaphragm, triggering a strategic spool displacement for effective pressure relief and stabilization. When pre-valve pressure ascends, the diaphragm withstands increased force, compressing the spring, while the spool adjusts to widen the valve opening, thus lowering the pressure back to the designated value. Conversely, if pre-valve pressure declines, the force on the diaphragm reduces, and the spring's reactive force adjusts the spool to narrow the valve opening, restoring pressure to the set level. Notably, should pre-valve pressure fall below the set value, the valve remains perpetually 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

 

For optimal performance in gas or low viscosity liquid applications, the AOC-3111 self-operated pressure regulating valve should ideally be mounted in an upright position on a horizontal pipeline. Should space constraints arise, the valve may be installed upside down or at an angle. Note: If the medium is confirmed to be clean, part 3 installation may not be necessary.

 

In applications involving steam or high viscosity liquids, the AOC-3111 self-operated pressure regulating valve is best installed in an inverted position on a horizontal pipeline to ensure maximum efficiency and reliability.
 

Production application

 

Company Profile

SNT Machinery (Qingdao) Co., Ltd. stands as a pioneering force in the realm of control valve production, seamlessly weaving together manufacturing, design, sales, and service into a unified enterprise. Strategically positioned on an expansive 42,000 m² site in the vibrant city of Qingdao, Shandong province, SNT boasts cutting-edge workshops and state-of-the-art production facilities. As a beacon of high-tech innovation, SNT champions independent intellectual property rights, fused with globally sourced advanced management and production techniques. With a dynamic team exceeding 150 members, 15% of whom are dedicated R&D specialists and 30% holding graduate or higher degrees, SNT thrives on its commitment to quality and avant-garde technology. This dedication culminates in the prolific output of premium valves tailored for the petrochemical, oil, and coal chemical industries, achieving an impressive sales milestone of nearly 100 billion in 2017.

SNT proudly holds the TS special equipment manufacturing certificate and ISO 9001 certification, along with the prestigious net qualification certificates from SINOPEC, CNOOC, PETROCHINA, and SINOCHEM, augmented by numerous National Patents. Mastery in designing and crafting a diverse range of valves according to ANSI, API, DIN, BS, JIS standards is a hallmark of SNT. By blending the distinguished attributes of globally renowned valves with its unique innovations, SNT's manufacturing prowess extends across an eclectic array of valves, including GLOBE, High Pressure Boiler Blow-down Valves, High-performance Butterfly Valves, Angle-regulating Valves, and Eccentric Rotary Valves.
Valves such as 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 showcase our extensive range. With driving options spanning manual operation, power-driven, pneumatic, and hydraulic systems, we cater to diverse operational needs. The superior materials used in crafting main parts include A216WCB, A217 WC6/WC9, and A351 CF8/CF8M/CF3/CF3M, with specifications ranging from 1/2" to 120", and accommodating working pressures from ANSI 150# to 2500#. Our valves are engineered to function efficiently across a broad temperature spectrum, from -196ºC to 1100ºC.

Through our advanced production technology management and robust quality assurance systems, SNT Valves have become the trusted choice in industries such as petrochemical, oil, steel & iron, paper manufacturing, and power stations. Esteemed clients include SINOPEC's QILU and Qingdao branches, CNOOC Huizhou Refinery, PETROCHINA's Guangxi and Ningxia branches, as well as the Jinan and Changling branches of SINOPEC. Our commitment to excellence ensures that SNT remains a key player in these vital industrial sectors.

Dedication to prioritizing our users' profits drives us to cultivate unparalleled quality and a distinguished brand reputation. Our unwavering quality assurance and comprehensive after-sales service systems promise that SNT valves not only meet but exceed customer expectations, forging strong partnerships and shared success.