Innovative Self-Operated Pressure Regulator for Precision Control Valves 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 Self-Operated Pressure Regulating Valve, an innovative solution by SNT Machinery (Qingdao) Co., Ltd., designed to deliver exceptional performance without the need for any external energy source. This cutting-edge product utilizes the inherent energy of the regulated medium for automatic regulation, making it an ideal choice for environments lacking electricity or gas while promoting energy conservation. The flexibility of this valve is unparalleled, allowing for arbitrary adjustments of the pressure setting within a predetermined range, ensuring adaptability to varied operational demands. The AOC-3000 is available in three distinct valve configurations to suit diverse process conditions: - AOC-3111: A single-seated self-acting pressure regulating valve, - AOC-3113: A sleeve self-acting pressure regulating valve, - AOC-3114: A double-seated self-acting pressure regulating valve. This versatility empowers users to select the optimal model based on specific operational conditions such as differential pressure, temperature, medium state, and leakage criteria. Additionally, the AOC-3000 is offered with three different actuator types tailored to various process requirements: - Diaphragm (available in both normal and reinforced versions), - Piston, - Metal diaphragm (bellows). Engineered with fast-opening flow characteristics, this valve ensures sensitive response and superior adjustment precision, boasting an error margin of ≤10%. Its compact design requires minimal space compared to traditional heavy hammer-type pressure reducing valves, and it is straightforward to adjust, thereby finding widespread application across industries including petroleum, chemical, electric power, metallurgy, food, light textile, machinery manufacturing, and civil construction. It is adept at managing gas, liquid, and steam pressure for: - Post-valve pressure reduction and stabilization, - Pre-valve pressure stabilization and relief.}
 

Actuator Features

 

Figure 1a illustrates the pressure-control valve's post-regulation mechanism, operating in a pressure-closed configuration. Here's how it works: As the medium travels into the valve body, following the direction indicated by the arrow, it undergoes a masterful journey through the valve seat and spool after precise throttling. Concurrently, the medium is expertly routed through the pressure tube-especially when steam is involved with a condenser-into the actuator, impacting the diaphragm. This ingenious setup prompts the spool to make appropriate displacements, achieving the dual objectives of pressure reduction and stabilization. In scenarios where post-valve pressure rises, the diaphragm experiences increased force, which compresses the spring and propels the spool, narrowing the valve opening until the desired pressure equilibrium is restored. Conversely, when the post-valve pressure diminishes, the diaphragm's force lessens, but the spring's reactive force steers the spool to widen the valve opening, maintaining the pressure at its pre-set standard.

 

Figure 1b showcases the regulator's prowess in managing pre-valve pressure, designed with a pressure-open mechanism. The process unfolds as follows: The medium flows into the valve body along the path specified by the arrow, then emerges through the valve seat and spool after a meticulous throttling procedure. Meanwhile, the pressure tube-particularly when handling steam paired with a condenser-efficiently channels the medium into the actuator to exert influence on the diaphragm. This results in strategic spool displacement, achieving pressure relief and stabilization. If pre-valve pressure escalates, the diaphragm force intensifies, compressing the spring and prompting the spool to expand the valve opening until the pressure subsides to its set threshold. Conversely, should the pre-valve pressure drop, the diaphragm force diminishes, and the spring's counteraction propels the spool to constrict the valve opening until the pressure is restored to the set level. If the pressure falls below the set point, the valve remains securely closed, ensuring optimal control.
 

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 when utilizing gas or media with low viscosity liquid, the AOC-3111 Self-Operated Pressure Regulating Valve should be expertly installed in an upright position on a horizontal pipe. In situations where spatial constraints are a concern, a diagonal or upside-down installation may be considered. Important note: If the medium is confirmed to be pristine and clean, the installation of part 3 can be happily omitted.

 

In the case of steam or media with high viscosity liquids, the AOC-3111 Self-Operated Pressure Regulating Valve should be artfully positioned upside down on a horizontal pipe. This method ensures reliable performance and seamless operation.
 

Production application

 

Company Profile

SNT Machinery (Qingdao) Co., Ltd stands as a distinguished manufacturer of control valves, masterfully integrating the realms of manufacturing, design, sales, and service. With a strong foundation and rapid growth trajectory, SNT is strategically located in Qingdao, Shandong Province, sprawling over an impressive 42,000 square meters. Our state-of-the-art facilities are equipped with cutting-edge production equipment. As a high-tech enterprise boasting independent intellectual property rights, we also leverage advanced global management and production techniques. Our dynamic workforce exceeds 150 employees, with research and development specialists comprising 15%, and 30% holding graduate or higher degrees. Driven by an elite production management team and pioneering R&D efforts, we produce high-quality valves extensively deployed in petrochemical, oil, and coal chemical sectors, achieving sales close to 100 billion in 2017.

SNT proudly holds the TS Special Equipment Manufacturing Certificate and ISO 9001, alongside the network qualification certificates from SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. With numerous national patents, we design and produce a comprehensive range of valves adhering to ANSI, API, DIN, BS, JIS standards. By fusing the finest global valve features with our proprietary research and development, we excel in manufacturing a diverse spectrum of 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 vast valve selection also encompasses V Ball Valves, High Wear-resistant Ball Valves, High Pressure Steam Valves, Micro-flow Control Valves, Self-operated Control Valves, Cryogenic Valves, among others. Available driving forms include manual, power-driven, pneumatic, and hydraulic options. Crafted with premium materials such as A216WCB, A217 WC6/WC9, A351 CF8/CF8M/CF3/CF3M, our valves range from specifications 1/2" to 120", working pressures of ANSI 150# to 2500#, and operating temperatures spanning -196ºC to 1100ºC.

Thanks to our advanced production technology management and an uncompromising quality assurance system, SNT valves enjoy extensive application in petrochemical, oil, steel & iron, paper manufacturing, and power station industries. Our prestigious clientele includes SINOPEC QILU branch, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi branch, PETROCHINA Ningxia branch, and more, cementing our reputation as an industry leader.

Placing our users' interests at the forefront, we dedicate ourselves to building a reputation for exceptional quality and a stellar brand. Our impeccable quality assurance and robust after-sales systems ensure that SNT valves foster enduring partnerships with our customers, paving the way for shared success and prosperity.