DN20-DN300 for Nominal Diameter for Flanged Reliable Self-Operated Pressure Regulator with Advanced Control Features 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 remarkable AOC-3000, a self-operated pressure regulating valve from SNT Machinery (Qingdao) Co., Ltd., designed to redefine efficiency and precision in pressure management. This innovative product stands out by its ability to function without any external energy source, utilizing the inherent energy of the regulated medium itself for automatic regulation. Particularly advantageous in environments devoid of electricity or gas, it is a champion of energy conservation. With flexibility at its core, the pressure setting value is adjustable within a specified range, offering unparalleled customization. The AOC-3000 adapts to a variety of process needs with three distinct valve forms: the AOC-3111 single-seated valve, the AOC-3113 sleeve valve, and the AOC-3114 double-seated valve. This versatility allows users to select the best fit based on working conditions such as differential pressure, temperature, medium state, and leakage requirements. Complementing its adaptable valve forms, the AOC-3000 also comes with three actuator types to suit diverse process scenarios: a diaphragm (both standard and reinforced), a piston, and a metal diaphragm (bellows). The fast-opening flow characteristics of the AOC-3000 ensure responsive action and exceptional adjustment precision (with an error rate of ≤10%). Despite its advanced capabilities, the valve is compact-far smaller than traditional heavy hammer pressure reducing valves-and offers ease of adjustment. Its robust design makes it ideal for use across a spectrum of industries including petroleum, chemical, electric power, metallurgy, food, light textile, machinery manufacturing, and civil construction. It effectively manages pressure reduction, pressure stabilization (post-valve adjustment), pressure relief, and pressure stabilization (pre-valve adjustment) for gases, liquids, and steam, ensuring reliable performance and efficiency.}
 

Actuator Features

 

Figure 1a showcases an ingenious method to control the post-control valve pressure regulator with a state-of-the-art pressure-closed operation mode. The action principle unfolds as the medium gracefully glides into the valve body, guided by the arrow's direction, before exiting via the meticulously engineered valve seat and spool after precise throttling. A secondary pathway through the pressure tube (utilized as a condenser when interfaced with steam) seamlessly introduces the medium to the actuator, prompting the diaphragm into action. This interaction induces a precise displacement of the spool, orchestrating a harmonious balance of pressure reduction and stabilization. As the pressure post-valve intensifies, the diaphragm experiences elevated force, spring compression occurs, and the spool adjusts to constrict the valve opening, restoring the pressure to its pre-set serenity. In contrast, should the pressure behind the valve wane, the diaphragm's force diminishes, allowing the spring's resilience to expand the valve opening, thus recalibrating the pressure to its intended equilibrium.

 

Figure 1b illustrates a sophisticated regulator designed to artfully manage pressure in front of the valve, featuring an innovative pressure open mode. The operational principle is expressed as the medium gracefully enters the valve body, guided by the arrow's direction, before making its exit through the precisely engineered valve seat and spool after adept throttling. A secondary route through the pressure tube (transformed into a condenser when interfacing with steam) seamlessly introduces the medium to the actuator, igniting the diaphragm into action. This interaction results in a precise spool displacement, achieving pressure relief and stabilization. As the pre-valve pressure escalates, the diaphragm experiences increased force, compressing the spring, which prompts the spool to enhance the valve opening until the pressure reverts to its pre-set tranquility. Conversely, a drop in pre-valve pressure diminishes diaphragm force, invoking the spring's reactive force to constrict the valve opening, thereby ensuring the pressure returns to its designed level. Should the pre-valve pressure dip below the set value, the valve remains steadfastly 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 media, the AOC-3111 type self-operated pressure regulating valve is ideally mounted upright on a horizontal pipeline. Only in situations where spatial constraints exist should it be installed upside down or at an angle. If the medium is confirmed to be clean, the installation of part 3 can be optional, offering flexible adaptability in various environments.

 

In applications involving steam or high-viscosity liquid media, the AOC-3111 type self-operated pressure regulating valve is typically mounted upside down on a horizontal pipeline to ensure efficient regulation and control.
 

Production application

 

Company Profile

SNT Machinery (Qingdao) Co., Ltd. stands as a distinguished manufacturer of control valves, seamlessly integrating design, sales, production, and service. Launching from a strong foundation and experiencing swift advancement, SNT is strategically based in the picturesque city of Qingdao, Shandong Province, sprawling across 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, bolstered by advanced management and production practices from abroad. With a dynamic team of over 150 skilled employees, of which 15% are dedicated R&D specialists, and 30% hold graduate degrees or higher, we thrive on a robust production management team and pioneering R&D. Our expertise enables the mass production of premium quality valves, pivotal to the petrochemical, oil, and coal chemical industries, with a notable sales achievement reaching nearly 100 billion in the year 2017.

SNT has secured the TS special equipment manufacturing certificate and ISO 9001 accreditation, and holds the net qualification certificate from industry giants such as SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. Our technological prowess is further validated by numerous National Patents. We are adept at designing and manufacturing a comprehensive range of valves, conforming to ANSI, API, DIN, BS, and JIS standards. By synthesizing the strengths of renowned global valves with our innovative research and development, we have mastered the production of various valves including GLOBE, High Pressure Boiler Blow-down Valves, high-performance Butterfly Valves, Angle-regulating Valves, Eccentric Rotary Valves, and T Three-eccentric Center Butterfly Valves.
Our portfolio also features V Ball Valves, High Wear-resistant Ball Valves, High Pressure Steam Valves, Micro-flow Control Valves, Self-operated Control Valves, and Cryogenic Valves. Our driving forms encompass manual, power-driven, pneumatic, and hydraulic operations. We utilize superior materials like A216WCB, A217 WC6/WC9, and A351 CF8/CF8M/CF3/CF3M among others. Our specifications range from 1/2" to 120", with working pressures from ANSI 150# to 2500# and operational temperatures spanning -196ºC to 1100ºC.

Leveraging advanced production technologies and a stringent quality assurance system, SNT valves have been extensively adopted across diverse sectors such as petrochemicals, oil, steel & iron, paper manufacturing, and power generation industries. Esteemed customers encompass entities like SINOPEC QILU branch, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi branch, and PETROCHINA Ningxia branch, among others.

Our commitment to enhancing user profitability is paramount, driving our dedication to exceptional quality and brand excellence. Our comprehensive quality assurance and after-sales support systems ensure that SNT valves maintain strong alliances with all our clients, guiding them towards shared prosperity and success.