Premium Self-Operated Pressure Regulator Featuring Zg230-450 Body Materials

• 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

 

For optimal performance in gas or low viscosity liquid media applications, the AOC-3111 type self-operated pressure regulating valve by SNT Machinery (Qingdao) Co., Ltd. is traditionally mounted upright on a horizontal pipeline. However, should spatial constraints arise, it can be effectively installed upside down or at a diagonal. Note: In scenarios where the medium is verified as clean, the installation of part 3 is optional.

 

In applications involving steam or high viscosity liquid media, the AOC-3111 type self-operated pressure regulating valve is customarily installed upside down on a horizontal pipe for enhanced functionality and efficiency.

 

Product Description

_{Introducing the remarkable AOC-3000 self-operated pressure regulating valve-an innovative masterpiece in the realm of pressure control. This advanced executive product operates independently, harnessing the inherent energy of the regulated medium, eliminating the need for external power sources. Experience its unparalleled adaptability in locations devoid of electricity or gas, all while reaping the benefits of energy conservation. Effortlessly adjust the pressure setting values within a broad range, tailored to your specific requirements. The AOC-3000 series offers a versatile selection of valve forms to cater to diverse process environments: AOC-3111 (single-seated); AOC-3113 (sleeve type); and AOC-3114 (double-seated). Users can effortlessly select according to the operational conditions such as differential pressure, temperature, medium state, and leakage needs. Additionally, the AOC-3000 series features three actuator types to enhance compatibility with various process demands: diaphragm (standard and reinforced), piston, and metal diaphragm (bellows). Designed with fast-opening flow characteristics, this valve ensures swift response and precise adjustment accuracy (error ≤10%). Its compact design occupies minimal space compared to the bulky hammer-type pressure reducing valves, making it a preferred choice across industries. Widely utilized in petroleum, chemical, electric power, metallurgy, food, light textile, machinery manufacturing, and civil construction sectors, it excels in gas, liquid, and steam pressure reduction, stabilization (post-valve adjustment), pressure relief, and stabilization (pre-valve adjustment). Embrace the future of pressure regulation with the AOC-3000 self-acting pressure regulating valve-a harmonious blend of innovation, efficiency, and versatility.}
 

Actuator Features

 

Figure 1a showcases an advanced system to expertly regulate post-control valve pressure, utilizing a pressure-closed valve action mode. The operational principle is ingeniously designed: guiding the medium flow into the valve body following the directional arrow, it passes through a meticulous throttling process via the valve seat and spool. An alternative route channels through the pressure tube, specifically adapted for steam with a condenser, reaching the diaphragm actuator. This interaction causes a precise displacement of the spool, achieving remarkable pressure reduction and stabilization. An increase in post-valve pressure escalates diaphragm force, compressing the spring and manipulating the spool to constrict the valve opening, until equilibrium is restored at the predetermined pressure level. Conversely, should the post-valve pressure drop, the diaphragm's force diminishes, allowing the spring's reaction to widen the valve opening, ensuring pressure elevation back to the desired set point.

 

Figure 1b illustrates a sophisticated regulator designed to impeccably manage pre-valve pressure with a pressure-open valve action mode. The operational mechanics are as follows: the medium enters the valve body, indicated by the arrow's direction, undergoing careful throttling via the valve seat and spool. Simultaneously, via the pressure tube, tailored for steam with a condenser, the medium is directed to the diaphragm actuator, inducing a measured spool displacement crucial for pressure relief and stabilization. An increase in pre-valve pressure amplifies diaphragm force, compressing the spring and prompting the spool to expand the valve opening until pressure decreases to the designated level. Conversely, a decrease in pre-valve pressure reduces diaphragm force, while the spring's reaction compels the spool to contract the valve opening, boosting pressure until it meets the set threshold. Notably, should pre-valve pressure fall below the set value, the valve remains firmly closed, ensuring optimal control and performance.
 

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 embodies excellence in the production of control valves, integrating the precision of manufacturing, innovative design, seamless sales, and dedicated service into a cohesive entity. Nestled in the vibrant city of Qingdao, Shandong Province, SNT spans an impressive 42,000 square meters, boasting cutting-edge workshops and state-of-the-art production facilities. As a high-tech enterprise, we pride ourselves on possessing independent intellectual property rights and employ advanced management and production methodologies from across the globe. Our talented workforce exceeds 150, with 15% dedicated R&D specialists, and 30% holding graduate or higher degrees. With a keen focus on superior production management and pioneering technological research, we deliver substantial volumes of premium valves that meet the demands of the petrochemical, oil, and coal chemical sectors. In 2017 alone, our sales soared to nearly 100 billion.

SNT has achieved the prestigious TS special equipment manufacturing certificate and ISO 9001 accreditation, along with a net qualification certificate from industry giants SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. Our commitment to innovation is underscored by numerous national patents. We excel in designing and manufacturing a vast array of valves adhering to ANSI, API, DIN, BS, and JIS standards. By synthesizing the strengths of renowned global valve technologies with our own research and development, we offer an extensive range of valves, including GLOBE, high-pressure boiler blow-down valves, high-performance butterfly valves, angle-regulating valves, and eccentric rotary valves. Our lineup also features T three-eccentric center butterfly valves.
Our product portfolio extends to V ball valves, high wear-resistant ball valves, high-pressure steam valves, micro-flow control valves, self-operated control valves, cryogenic valves, and more. We provide diverse driving forms, such as manual operation, power-driven, pneumatic, and hydraulic drive systems. The primary components are crafted from top-grade materials like A216WCB, A217 WC6/WC9, A351 CF8/CF8M/CF3/CF3M, ensuring robustness and reliability. Specifications range from 1/2" to 120", with working pressures from ANSI 150# to 2500#, and operating temperatures spanning -196ºC to 1100ºC.

With our advanced production technology and quality assurance systems, SNT valves have become integral to the petrochemical, oil, steel & iron, paper manufacturing, and power station industries. Esteemed clients such as SINOPEC's QILU and Qingdao branches, CNOOC's Huizhou Refinery, PETROCHINA's Guangxi and Ningxia branches, SINOPEC's Changling and Jinan branches, and more, trust our products for their critical operations.

We prioritize our customers' success, dedicating ourselves to crafting exceptional quality and a prestigious brand reputation. Our comprehensive quality assurance and after-sales service systems are designed to empower SNT valves, fostering prosperous partnerships with our valued clients.