Self-Operated Pressure Regulator with Zg0cr18ni9ti and Butt Welding

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

Mounting Method

 

When the valve is employed within gas or low viscosity liquid media, the AOC-3111 type self-operated pressure regulating valve is typically mounted in an upright position on a horizontal pipe. This ensures optimal performance and reliability. Installation in an upside-down or diagonal orientation is only suggested when spatial constraints prevent standard positioning. (Note: If the medium is verified as clean, part 3 installation may be unnecessary.)

 

For scenarios involving steam or high viscosity liquid media, installation of the AOC-3111 type self-operated pressure regulating valve is customarily executed in an upside-down manner on a horizontal pipe. This setup is designed to accommodate the unique demands of such media, ensuring efficient operation and durable service.

 

Product Description

_{Introducing the AOC-3000 Self-Operated Pressure Regulating Valve - the epitome of innovation in pressure regulation technology. This cutting-edge executive product operates seamlessly without the need for any external energy sources, utilizing the medium's intrinsic energy for flawless automatic regulation. The standout feature of the AOC-3000 is its exceptional versatility, as it thrives in environments devoid of electricity or gas, making it an energy-saving marvel. With an adjustable pressure setting range, it caters to diverse operational needs. For ultimate adaptability, the AOC-3000 series offers three distinct valve forms tailored to various process requirements: the AOC-3111 Single-Seated Valve, the AOC-3113 Sleeve Valve, and the AOC-3114 Double-Seated Valve, ensuring precise alignment with working conditions, such as differential pressure, temperature, and medium state, along with specific leakage requirements. Additionally, the AOC-3000 is equipped with three actuator types to accommodate a multitude of process demands: the standard and reinforced diaphragm, piston, and metal diaphragm (bellows) actuators. Designed with fast-opening flow characteristics, this valve guarantees sensitive response and unparalleled adjustment precision (error ≤10%), all while occupying minimal space compared to conventional heavy hammer type pressure reducing valves. Its ease of adjustment and reliability have made it a staple in industries such as petroleum, chemical, electric power, metallurgy, food, light textile, machinery manufacturing, civil construction, and more. Whether it's gas, liquid, or steam, the AOC-3000 excels in pressure reduction, stabilization (post-valve adjustment), relief, and pre-valve stabilization, making it the go-to solution for diverse applications.}
 

Actuator Features

 

Figure 1a: This sophisticated mechanism is engineered to control the pressure in the valve post-control scenario through its pressure-closed operation mode. Here's how it works: The medium elegantly flows into the valve body, guided by the direction of the arrow, and is skillfully moderated by the valve seat and spool, following a precise throttling process. Concurrently, the medium-when involving steam and a condenser-is channeled through the pressure tube, activating the diaphragm within the actuator. This prompts the spool to make a delicately calculated displacement, achieving seamless pressure reduction and stabilization. Should the pressure post-valve rise, the diaphragm experiences an increased force, leading to the compression of the spring and the subsequent movement of the spool, resulting in reduced valve opening until equilibrium is restored to the pre-set value. Conversely, if post-valve pressure diminishes, the diaphragm's force decreases, prompting the spring's reaction force to drive the spool, thereby increasing the valve opening until the pressure aligns perfectly with the desired set value.

 

Figure 1b: The expertly crafted regulator is designed to meticulously manage the pressure preceding the valve, operating in a pressure-open configuration. The process unfolds as follows: The medium gracefully enters the valve body, adhering to the arrow's guidance, experiencing throttling at the valve seat and spool. Simultaneously, when combined with a condenser, the steam-laden medium is directed through the pressure tube into the actuator, acting upon the diaphragm and instigating precise spool displacement to accomplish pressure relief and stabilization. As the pressure in front of the valve escalates, the diaphragm's force increases, compressing the spring and urging the spool to expand the valve opening, effectively lowering the pressure to the specified set value. Conversely, if the pressure drops, the diaphragm's force wanes, enabling the spring's reactive push to command the spool, gradually diminishing the valve opening until the pressure rebounds to the optimal set value. Notably, if the pressure ahead of the valve lags behind 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

 

Production application

 

 

 

Company Profile

SNT Machinery (Qingdao) Co., Ltd stands at the forefront of control valve manufacturing, harmoniously blending innovation, design, sales, and service into one cohesive entity. Our journey of excellence is rooted in a high starting point, witnessing rapid development. Nestled in the vibrant city of Qingdao, Shandong province, SNT sprawls across an impressive 42,000 square meters, boasting state-of-the-art workshops and cutting-edge production facilities. As a high-tech enterprise with independent intellectual property rights, we have seamlessly integrated advanced management and production techniques from around the globe. Our dedicated workforce exceeds 150 professionals, with R&D specialists comprising 15% and those with graduate-level or higher degrees making up 30%. Our commitment to a robust production management team and pioneering technology ensures the delivery of high-quality valves for petrochemical, oil, and coal chemical industries. By 2017, our sales value soared to nearly 100 billion, underscoring our industry leadership.

SNT proudly holds the esteemed TS Special Equipment Manufacturing Certificate and ISO 9001 certification. Our qualifications extend to the net approval certificates from leading giants like SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. With numerous national patents under our belt, we expertly design and manufacture a comprehensive range of valves adhering to ANSI, API, DIN, BS, and JIS standards. By blending the best features from renowned global valves with our own innovative R&D, we produce an extensive variety of valves including GLOBE, High Pressure Boiler Blow-down Valves, High-performance Butterfly Valves, Angle-regulating Valves, Eccentric Rotary Valves, T Three-eccentric Center Butterfly Valves, and more.
Our versatile valve range extends to 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 mechanisms encompass manual, power-driven, pneumatic, and hydraulic options. The main components are crafted from durable materials such as A216WCB, A217 WC6/WC9, and A351 CF8/CF8M/CF3/CF3M. Our specifications range from 1/2" to 120", with working pressures of ANSI 150# to 2500#, and temperatures spanning from -196ºC to 1100ºC, ensuring reliability across diverse applications.

Thanks to our advanced production technology, management, and quality assurance systems, SNT valves have earned a distinguished presence in various industries, including petrochemical, oil, steel & iron, paper manufacturing, and power stations. Our esteemed clientele consists of industry leaders such as SINOPEC Qilu Branch, SINOPEC Qingdao Branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi Branch, PETROCHINA Ningxia Branch, and several others, reflecting our strong market credibility and trust.

Placing customer success at the heart of our mission, SNT is committed to crafting superior quality and establishing a reputable brand. Our comprehensive quality assurance and stellar after-sales service systems ensure that SNT valves forge strong partnerships with our clients, leading to shared success and prosperity.