Versatile Self-Operated Pressure Regulator for Self-Acting Valve Systems with Carbon Steel Materials

• 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: A pinnacle in engineering, this self-operated pressure regulating valve is a remarkable solution that eliminates the need for external energy sources. Utilizing the innate energy of the regulated medium itself, this product is a masterpiece of efficiency and sustainability. Designed to thrive in environments devoid of electricity or gas, it promises unmatched energy conservation. The pressure setting is fully adjustable within a specified range, ensuring tailored performance for diverse applications. The AOC-3000 is available in three distinguished valve forms to meet the demands of various process scenarios: the AOC-3111 single-seated model, the AOC-3113 sleeve model, and the AOC-3114 double-seated model. Users can select the ideal type based on working conditions such as differential pressure, temperature, medium state, and specific leakage requirements. Moreover, this versatile system is available in three actuator types to perfectly match process needs: the standard and reinforced diaphragm models, a robust piston version, and the metal diaphragm (bellows) variant. With its rapid-opening flow characteristics, the AOC-3000 delivers swift, precise regulation with an impressively low error margin (≤10%). Its compact design, as opposed to bulkier alternatives like the heavy hammer type, allows for seamless integration and straightforward adjustments. Widely adopted across industries such as petroleum, chemical, electric power, metallurgy, food, light textiles, machinery manufacturing, and civil construction, this valve excels in the regulation of gas, liquid, and steam. It is the quintessential choice for applications requiring pressure reduction, stabilization (both pre- and post-valve adjustment), and pressure relief.}
 

Actuator Features

 

Figure 1a showcases a masterfully engineered post-control valve pressure regulator, operating in a pressure-closed mode. Here's how it works: The medium enters the valve body as indicated by the arrow and passes through a process of throttling via the valve seat and spool. In another pathway, through the pressure tube (utilizing a condenser for steam mediums), it influences the actuator, engaging the diaphragm. This results in the spool adjusting its position to seamlessly achieve pressure reduction and stabilization. Should the valve experience an increase in post-pressure, the force increment on the diaphragm compresses the spring, which in turn modulates the spool to restrict the valve opening until equilibrium is restored. Conversely, a decrease in post-pressure diminishes the diaphragm's force, allowing the spring's reactive power to coax the spool into enlarging the valve opening, harmonizing the pressure to its set point.

 

In Figure 1b, witness the sophisticated regulator designed to seamlessly control pre-valve pressure, functioning in a pressure-open mode. Witness its operation: As the medium flows into the valve body, indicated by the arrow, it undergoes throttling at the valve seat and spool. Alternatively, it navigates through the pressure tube (accompanied by a condenser in steam applications) to impact the actuator, engaging the diaphragm. This stimulates the spool to adjust its stance, facilitating pressure relief and stabilization with finesse. An uptick in pre-valve pressure enhances the force on the diaphragm, compressing the spring and motivating the spool to widen the valve opening until the pressure reverts to its preset benchmark. Conversely, should pre-valve pressure wane, the diaphanous force decreases, and the spring's counteraction narrows the valve opening, reinstating the pressure to its designated level. Should the pre-valve pressure fall beneath this threshold, the valve remains vigilantly 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 efficiency in regulating gas or low viscosity liquid media, the AOC-3111 type self-operated pressure regulating valve should be ideally mounted upright on a horizontal pipe. In instances where space constraints arise, flexibility permits installation either upside down or diagonally. For applications where the medium is confirmed to be clean, part 3 installation might be deemed unnecessary, streamlining the setup process.

 

In scenarios involving steam or high viscosity liquid media, the AOC-3111 type self-operated pressure regulating valve exhibits superior performance when installed upside down on a horizontal pipe. This orientation ensures optimal functionality and consistent operation in challenging media environments.
 

Production application

 

Company Profile

SNT Machinery (Qingdao) Co., Ltd. is a visionary leader in the production of control valves, seamlessly blending the expertise of manufacturing, design, sales, and service into one harmonious operation. With a strategic location in Qingdao, Shandong province, our sprawling 42,000m2 facility boasts state-of-the-art workshops and cutting-edge production equipment. Recognized as a high-tech enterprise, SNT proudly holds independent intellectual property rights and leverages advanced management and production processes imported from industry leaders. Our team comprises over 150 dedicated professionals, with 15% specializing in research and development, and 30% holding graduate or higher degrees. Driven by an unwavering commitment to quality and innovation, we manufacture vast quantities of premium valves for the petrochemical, oil, and coal chemical sectors, achieving a remarkable sales value nearing 100 billion in 2017.

SNT proudly holds the prestigious TS Special Equipment Manufacturing Certificate and ISO 9001 accreditation. We are also certified by industry giants such as SINOPEC, CNOOC, PETROCHINA, and SINOCHEM, and have secured numerous national patents for our groundbreaking technologies. With capabilities to design and manufacture valve series conforming to ANSI, API, DIN, BS, and JIS standards, SNT skillfully merges global valve innovations with our own R&D excellence. Our diverse portfolio includes GLOBE Valves, High Pressure Boiler Blow-down Valves, High-performance Butterfly Valves, Angle-regulating Valves, Eccentric Rotary Valves, and more, exemplifying our vast manufacturing prowess.
Our expansive product range features V Ball Valves, High Wear-resistant Ball Valves, High Pressure Steam Valves, Micro-flow Control Valves, Self-operated Control Valves, Cryogenic Valves, and beyond. Available in manual, power-driven, pneumatic, and hydraulic drive forms, our valves are crafted from top-notch materials such as A216 WCB, A217 WC6/WC9, A351 CF8/CF8M/CF3/CF3M, etc., and are engineered to specifications ranging from 1/2" to 120", with working pressures spanning ANSI 150# to 2500#, and temperatures from -196ºC to 1100ºC.

Backed by advanced production technology and a robust quality assurance system, SNT Valves are trusted across a wide array of industries including petrochemical, oil, steel & iron, paper manufacturing, and power stations. Our esteemed clientele includes industry leaders such as SINOPEC QILU Branch, SINOPEC Qingdao Branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi Branch, PETROCHINA Ningxia Branch, among others, who rely on our valves for their critical operations.

At SNT, we place our customers' success at the forefront of our mission, committing ourselves to the pursuit of unparalleled quality and an esteemed brand reputation. Our comprehensive quality assurance and dedicated after-sales service systems ensure that SNT valves stand alongside our clients in a partnership of prosperity and excellence.