Reliable Self-Operated Pressure Regulator with Butt Welding and CF3m

• 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

 

In scenarios where the valve regulates gas or low viscosity liquid media, the AOC-3111 type self-operated pressure regulating valve should ideally find its place upright on a horizontal pipeline. In cases where spatial constraints dictate otherwise, it may be installed upside down or at an angle. Rest assured, when the medium is confirmed to be clean, there's potential for omitting part 3, streamlining your installation process.

 

For applications involving steam or high viscosity liquid media, the preferred installation method for the AOC-3111 type self-operated pressure regulating valve is upside down on a horizontal pipeline, ensuring optimal performance and reliability.

 

Product Description

_{The AOC-3000 Self-Operated Pressure Regulating Valve is a cutting-edge executive product that operates without the need for any external energy. Utilizing the energy of the regulated medium itself, this valve automatically regulates pressure, making it an energy-efficient solution. A standout feature of the AOC-3000 is its capability to function in environments devoid of electricity or gas, ensuring energy conservation. The pressure setting value can be flexibly adjusted within a specified range to meet diverse needs. The AOC-3000 self-acting pressure regulating valve is available in three distinct valve forms tailored for various process applications: AOC-3111, a single-seated valve; AOC-3113, a sleeve valve; and AOC-3114, a double-seated valve. This variety allows users to select the perfect fit based on specific working conditions, including differential pressure, temperature, medium state, and leakage demands. Furthermore, the AOC-3000 valves offer three actuator types to suit different process needs: diaphragm (both normal and reinforced), piston, and metal diaphragm (bellows). This self-operated valve boasts fast-opening flow characteristics, with a highly sensitive response and superior adjustment precision (error ≤10%). The compact design of the valve, as compared to the bulkier hammer-type pressure-reducing valves, simplifies adjustment and makes it ideal for a broad range of industries. It is extensively applied in petroleum, chemical, electric power, metallurgy, food, light textile, machinery manufacturing, civil construction, and more, for tasks such as gas, liquid, and steam pressure reduction, pressure stabilization (post-valve adjustment), pressure relief, and pressure stabilization (pre-valve adjustment).}
 

Actuator Features

 

Figure 1a: This innovative device is specifically designed for controlling the post-control valve pressure regulator and operates in a pressure-closed mode. Here's how it works: The medium enters the valve body following the arrow's direction and, after precise throttling, exits through the valve seat and spool. Additionally, some medium is diverted via the pressure tube (in steam applications, together with a condenser) into the actuator, engaging the diaphragm to cause a precise displacement of the spool. This mechanism ensures effective pressure reduction and stabilization. When post-valve pressure rises, increased force on the diaphragm compresses the spring, driving the spool to narrow the valve opening until equilibrium is restored at the desired set pressure. Conversely, if post-valve pressure diminishes, the diaphragm's reduced pressure allows the spring to push the spool to enlarge the valve opening, thus restoring balance at the target pressure.

 

Figure 1b: Engineered for excellence, this regulator manages pressure in front of the valve and functions in a pressure-open mode. Here's the principle: The medium flows into the valve body from the arrow-indicated direction, proceeding through throttling and exiting via the valve seat and spool. Part of the medium is channeled through the pressure tube (in steam settings, with a condenser) to the actuator, working on the diaphragm to cause the spool's displacement, resulting in efficient pressure relief and stabilization. If the pre-valve pressure rises, the diaphragm's force increases, compressing the spring and prompting the spool to widen the valve opening until pre-valve pressure falls to the designated set level. Similarly, if pre-valve pressure drops, the diaphragm's force decreases, and the spring's reactive force moves the spool to reduce the valve opening, maintaining stability until pressure ascends to the desired set value. Notably, if pre-valve pressure falls below the set threshold, the valve remains closed, ensuring reliability.
 

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 as a titan in control valve production, seamlessly merging the art of manufacturing, designing, sales, and service into a symphony of technological excellence. Strategically nestled in the vibrant city of Qingdao, Shandong province, our expansive 42,000m2 facility is a beacon of modern innovation, housing cutting-edge workshops and state-of-the-art production equipment. As a distinguished high-tech enterprise, we pride ourselves on our independent intellectual property rights and the infusion of globally acclaimed management and production expertise. Our dynamic team, composed of over 150 dedicated professionals, includes an impressive 15% of R&D specialists, while 30% boast graduate or higher degrees. This fusion of top-tier talent and pioneering research propels SNT's production of superior quality valves, primarily serving the petrochemical, oil, and coal chemical sectors. A testament to our success, we achieved a staggering sales value of nearly 100 billion yuan 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 innovative spirit is recognized through multiple national patents, testament to our technological prowess. We expertly design and manufacture a comprehensive range of valves in accordance with ANSI, API, DIN, BS, and JIS standards. By harnessing the strengths of globally renowned valve designs and channeling our independent research capabilities, SNT has mastered the production of an extensive array of valves including GLOBE, High-Pressure Boiler Blow-down Valves, High-performance Butterfly Valves, Angle-regulating Valves, and Eccentric Rotary Valves, among others.
Our portfolio extends to 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. Our diverse driving systems encompass manual, power-driven, pneumatic, and hydraulic options. We employ top-tier materials such as A216WCB, A217 WC6/WC9, and A351 CF8/CF8M/CF3/CF3M, supporting specifications from 1/2" to 120", withstanding pressures ranging from ANSI 150# to 2500#, and operating temperatures spanning -196ºC to 1100ºC.

Guided by advanced production technology management and an unwavering quality assurance system, SNT valves have become instrumental across an array of industries, including petrochemical, oil, steel & iron, paper manufacturing, and power stations. Our esteemed clientele includes industry giants such as SINOPEC QILU branch, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi branch, PETROCHINA Ningxia branch, SINOPEC Qingdao Refinery, and more, underscoring our commitment to excellence and client satisfaction.

At SNT, our commitment to maximizing user profit is unwavering. We dedicate ourselves to cultivating a legacy of unparalleled quality and a distinguished brand reputation. Our meticulously crafted quality assurance and after-sales service systems ensure that SNT valves garner client trust and forge a path to shared success and prosperity alongside our valued partners.