High-Performance Self-Operated Pressure Regulator with A351 CF8 Body

• 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 gas or low viscosity liquid media, the AOC-3111 type self-operated pressure regulating valve from SNT Machinery (Qingdao) Co., Ltd. is your go-to solution. Typically, it's installed in an upright position on a horizontal pipe, ensuring seamless operation. However, if spatial constraints arise, it can be adeptly set in an upside-down or diagonal position, ensuring flexibility and efficiency. Notably, if the medium's cleanliness is verified, the installation of part 3 can be gracefully omitted, simplifying the process.

 

For steam or high viscosity liquid media, the AOC-3111 type self-operated pressure regulating valve is expertly designed for upside-down installation on a horizontal pipe. This configuration ensures optimal performance and reliability for your high-demand applications.

 

Product Description

_{Introducing the AOC-3000 Self-Operated Pressure Regulating Valve-a marvel of modern engineering from SNT Machinery (Qingdao) Co., Ltd. This cutting-edge solution operates with unparalleled autonomy, drawing solely on the inherent energy of the regulated medium, ensuring seamless performance without the need for external energy such as electricity or gas. Ideal for environments where energy savings are paramount, this valve offers adjustable pressure settings within a defined range, providing flexibility for diverse applications. The AOC-3000 series features three distinct valve configurations to cater to various process requirements: the AOC-3111 (single-seated), AOC-3113 (sleeve), and AOC-3114 (double-seated) self-acting pressure regulating valves. Users can select the ideal model tailored to specific operational conditions, such as differential pressure, temperature, medium state, and leakage criteria. Furthermore, the series boasts three actuator variations to accommodate diverse applications: the diaphragm (available in both normal and reinforced variants), the piston, and the metal diaphragm (bellows). This flexibility ensures optimal performance across a myriad of use cases. Engineered for excellence, the AOC-3000 leverages fast-opening flow characteristics to guarantee responsive and precise adjustment (with an impressive error margin of ≤10%). Its compact design significantly reduces spatial requirements compared to traditional heavy hammer type pressure reducing valves, making installation and adjustments remarkably convenient. Widely embraced across industries such as petroleum, chemical, electric power, metallurgy, food, light textile, and machinery manufacturing, this versatile valve excels in regulating gas, liquid, and steam pressures-whether for reduction, stabilization (post-valve adjustment), relief, or stabilization (pre-valve adjustment) in civil construction and beyond.}
 

Actuator Features

 

Figure 1a: This intricate diagram illustrates the sophisticated dynamics used to control the post-control valve pressure regulator with precision. The valve action operates as a pressure-closed type, showcasing its remarkable functionality. Here's how it works: The medium elegantly flows into the valve body, guided by the directional arrow. Once inside, it undergoes controlled throttling by the valve seat and spool, ensuring optimal pressure management. Simultaneously, an alternate pathway through the pressure tube, particularly for steam with a condenser, leads the medium into the actuator. Here, it interacts with the diaphragm, prompting a responsive displacement of the spool. This sequence achieves a harmonious balance of pressure reduction and stabilization. Should the post-valve pressure rise, the enhanced force on the diaphragm compresses the spring, precisely driving the spool to decrease valve opening, until the pressure resumes its set value. Conversely, a decrease in post-valve pressure results in a diminished force on the diaphragm. The spring's reaction force seamlessly guides the spool to expand the valve opening, restoring the pressure to its intended set value.

 

Figure 1b: This insightful diagram details the regulator's method for maintaining pressure in front of the valve with finesse. As a pressure-open type mechanism, its action principle unfolds as follows: The medium embarks on its journey into the valve body, as directed by the arrow, and is subjected to methodical throttling by the valve seat and spool, all in pursuit of stable pressure management. Through another conduit via the pressure tube-particularly when the medium comprises steam with a condenser-the medium finds its way into the actuator, engaging with the diaphragm. Here, it triggers a calculated displacement of the spool, realizing effective pressure relief and stabilization. An increase in pre-valve pressure boosts the diaphragm's force, compressing the spring, thus driving the spool to widen the valve opening until pressure diminishes to its preset value. Conversely, a pressure dip before the valve results in reduced force on the diaphragm. The spring's responsive force then guides the spool to taper the valve opening, ensuring pressure elevation back to the established set value. If the pre-valve pressure falls below the set threshold, 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. is a distinguished manufacturer of control valves, seamlessly integrating manufacturing, design, sales, and service under one roof. With its establishment rooted in a strategic high starting point, SNT has rapidly evolved. Nestled in the dynamic city of Qingdao, Shandong Province, SNT spans an impressive 42,000 square meters, boasting state-of-the-art workshops and production equipment. As a cutting-edge enterprise, SNT holds independent intellectual property rights and has assimilated advanced international management and production practices. Employing over 150 dedicated professionals, 15% of whom are R&D specialists, and 30% possessing graduate or higher degrees, SNT thrives on a robust team of high-quality production management and innovative research and development. Our sophisticated valves are extensively utilized across petrochemical, oil, and coal chemical industries, achieving a remarkable sales value approaching 100 billion in 2017.

SNT proudly holds the TS Special Equipment Manufacturing Certificate and ISO 9001 accreditation, alongside prestigious net qualification certificates from SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. Our technological prowess is further evidenced by numerous national patents. We excel in designing and manufacturing a comprehensive array of valves adhering to ANSI, API, DIN, BS, and JIS standards. By amalgamating the finest aspects of renowned global valve technologies with our independent research and development, SNT excels in producing an extensive range of valves, including the 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 repertoire extends to V Ball Valves, High Wear-resistant Ball Valves, High Pressure Steam Valves, Micro-flow Control Valves, Self-Operated Control Valves, Cryogenic Valves, among others. Our drive systems encompass manual, power-driven, pneumatic, and hydraulic operations, with primary materials such as A216WCB, A217 WC6/WC9, and A351 CF8/CF8M/CF3/CF3M. We offer specifications ranging from 1/2" to an extensive 120", with working pressures of ANSI 150# to 2500# and temperatures spanning from a frigid -196ºC to a scorching 1100ºC.

Harnessing advanced production technology and a comprehensive quality assurance system, SNT Valves are prevalent across petrochemical, oil, steel & iron, paper manufacturing, and power station industries. Esteemed clients include industry giants such as SINOPEC Qilu and Qingdao branches, CNOOC Huizhou Refinery, PETROCHINA Guangxi and Ningxia branches, among others, showcasing our expansive reach and trusted partnerships.

Placing user profitability at the forefront, SNT is committed to cultivating an impeccable quality and a distinguished brand. Our unparalleled quality assurance and after-sales systems ensure that SNT Valves not only meet the expectations but exceed them, forging prosperous relationships with our esteemed clientele.