High-Quality Self-Operated Pressure Regulator with Zg0cr18ni9ti and Butt Welding with Carbon Steel Materials

• Customization: Available
• Temperature: Ordinary Temperature
• Certification: GS, RoHS, CE, ISO9001
• Model NO.: AOC-3111B
• Media: Gas, Oil, Water, Acid
• 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

 

For optimal performance when dealing with gas or low viscosity liquid media, the AOC-3111 type self-operated pressure regulating valve from SNT Machinery (Qingdao) Co., Ltd. should ideally be installed upright on a horizontal pipeline. In cases where space constraints exist, it may be mounted upside down or diagonally. If the medium is confirmed to be clean, the installation of part 3 can be omitted, simplifying the setup.

 

When it comes to steam or high viscosity liquid media, the AOC-3111 type self-operated pressure regulating valve is best installed in an inverted position on a horizontal pipe. This configuration maximizes efficiency and ensures robust performance in challenging media environments.

 

Product Description

_{Introducing the AOC-3000, a state-of-the-art self-operated pressure regulating valve designed for unmatched efficiency and versatility. This innovative executive product operates independently without the need for external energy sources, skillfully harnessing the innate energy of the regulated medium. Its standout feature is its ability to function seamlessly in environments devoid of electricity or gas, making it a paragon of energy conservation. The AOC-3000 offers you the freedom to set the pressure dynamically within a specified range, catering to diverse operational needs. Tailored for flexibility, it is available in three distinct valve forms to suit various process requirements: AOC-3111, the single-seated self-acting valve; AOC-3113, the sleeve self-acting valve; and AOC-3114, the double-seated self-acting valve. Select the ideal model based on specific conditions such as differential pressure, temperature, medium state, and leakage demands. Enhancing its adaptability further, the AOC-3000 provides three actuator types: the traditional diaphragm (available in normal and reinforced variants), the robust piston, and the durable metal diaphragm (bellows). The valve features fast-opening flow characteristics, ensuring a rapid response and exceptional adjustment precision with an error margin of ≤10%. Its compact design, especially compared to the cumbersome hammer-type pressure reducing valves, ensures ease of adjustment and installation. Trusted across industries, the AOC-3000 is a favorite in sectors like petroleum, chemical, electric power, metallurgy, food, light textile, machinery manufacturing, civil construction, and more, expertly managing the pressure reduction, stabilization, and relief of gases, liquids, and steam for both pre- and post-valve adjustments.}
 

Actuator Features

 

Figure 1a: This sophisticated device is designed to expertly manage the pressure of post-control valves, operating in a pressure-closed mode. The mechanism is ingeniously crafted: as the medium enters the valve body, signaled by the directional arrow, it gracefully exits through the valve seat and spool post-throttling. Another pathway allows the medium via the pressure tube-paired with a condenser if steam is the medium-to stimulate the actuator diaphragm. This interaction prompts the spool to shift strategically, fostering pressure reduction and stabilization. Should the downstream pressure rise, the diaphragm's force intensifies, compressing the spring and manipulating the spool to diminish the valve opening until equilibrium at a set pressure is achieved. Conversely, if downstream pressure wanes, the diaphragm's influence weakens, allowing the spring's response to broaden the valve opening until the desired pressure is reestablished.

 

Figure 1b: Engineered to seamlessly regulate the upstream pressure, this regulator operates as a pressure-open type. The medium gracefully enters the valve body, guided by the arrow, and exits through the valve seat and spool, following careful throttling. As with its counterpart, the pressure tube-integrated with a condenser for steam mediums-channels the medium into the actuator to engage the diaphragm. This interaction results in the spool's precise displacement, aimed at achieving pressure release and stabilization. If the upstream pressure heightens, diaphragm force increases, compressing the spring and prompting the spool to widen the valve opening until the pressure settles at its designated level. Conversely, declining upstream pressure diminishes diaphragm influence, and the spring's gentle reaction narrows the valve opening, nurturing a rise to the set pressure. The valve remains closed if the upstream pressure falls below the set threshold, ensuring a meticulous 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

 

Production application

 

 

 

Company Profile

SNT Machinery (Qingdao) Co., Ltd. stands at the forefront of control valve production, seamlessly integrating manufacturing, design, sales, and services under one roof. With a strategic location in the thriving city of Qingdao, Shandong province, our expansive 42,000 square meter facility is furnished with cutting-edge workshops and state-of-the-art production equipment. We are a high-tech enterprise bolstered by independent intellectual property rights and enriched by advanced management and production techniques imported from leading global practices. Boasting a vibrant team of over 150 employees, 15% of whom are dedicated R&D specialists, and with 30% holding graduate or higher degrees, SNT is a powerhouse of innovation and quality. Our commitment to exceptional production management and groundbreaking research and development enables us to produce vast quantities of superior valves, pivotal for applications in petrochemical, oil, and coal chemical industries. In 2017, our sales soared to nearly 100 billion, a testament to our quality and reliability.

SNT proudly holds the TS Special Equipment Manufacturing Certificate and the esteemed ISO 9001 certification, alongside securing the net qualification certificate from industry giants such as SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. Our dedication to innovation has earned us numerous National Patents across various technologies. We expertly design and manufacture a comprehensive range of valves in strict compliance with ANSI, API, DIN, BS, and JIS standards. By integrating the best features of world-renowned valves with our own proprietary research and development, SNT has mastered the art of crafting a diverse array of valve offerings including GLOBE, High Pressure Boiler Blow-down Valves, High-performance Butterfly Valves, and Angle-regulating Valves, among others.
Our extensive product line also features Eccentric Rotary Valves, 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. We offer a range of driving forms including manual, power-driven, pneumatic, and hydraulic operations. Essential components are crafted from premium materials such as A216WCB, A217 WC6/WC9, and A351 CF8/CF8M/CF3/CF3M. Our valves are available in specifications ranging from 1/2" to 120", withstanding working pressures from ANSI 150# to 2500#, and operational temperatures spanning -196ºC to 1100ºC.

Leveraging sophisticated production technology management and a robust quality assurance system, SNT valves have become indispensable assets in petrochemical, oil, steel & iron, paper manufacturing, and power station industries. Our esteemed clientele includes top-tier branches such as SINOPEC QILU, SINOPEC Qingdao, CNOOC Huizhou Refinery, PETROCHINA Guangxi, PETROCHINA Ningxia, and more, reflecting the trust and reliability our products command.

We are unwavering in our commitment to maximizing our users' profits by fostering excellence in quality and brand prestige. Our impeccable quality assurance and after-sales support systems ensure that SNT valves forge enduring partnerships with our clients, driving mutual growth and prosperity.