Premium Self-Operated Pressure Regulator for A351 CF8 Valve Body 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 applications involving gas or low viscosity liquid media, the AOC-3111 type self-operated pressure regulating valve from SNT Machinery (Qingdao) Co., Ltd., with its robust A351 CF8 valve body materials, is designed to be mounted upright on a horizontal pipe. In situations where spatial constraints exist, the valve can be uniquely installed either upside down or diagonally. If the medium is verified to be clean, installation of part 3 may be omitted, streamlining the process.

 

When dealing with steam or high viscosity liquid media, the versatility of the AOC-3111 type self-operated pressure regulating valve comes to the fore. It is typically mounted upside down on a horizontal pipe, ensuring optimal performance and reliability in demanding applications.

 

Product Description

_{Introducing the AOC-3000 Self-Operated Pressure Regulating Valve, a marvel of engineering from SNT Machinery (Qingdao) Co., Ltd. This innovative solution is an executive piece of technology that elegantly eliminates the need for external energy. Harnessing the inherent energy of the regulated medium, it provides seamless automatic regulation. Perfectly suited for environments devoid of electricity or gas, this self-sufficient valve not only saves energy but also delivers versatility and reliability. The pressure setting is a breeze to adjust, allowing customization within a defined range for optimal performance. The AOC-3000 series presents unparalleled adaptability with three distinct valve forms tailored to meet the diverse needs of various process conditions: - AOC-3111: Single-Seated Self-Acting Pressure Regulating Valve - AOC-3113: Sleeve Self-Acting Pressure Regulating Valve - AOC-3114: Double-Seated Self-Acting Pressure Regulating Valve Select based on specific working conditions such as differential pressure, temperature, medium state, and leakage requirements. Moreover, the AOC-3000 series offers three actuator types catering to different process scenarios: - Diaphragm (Available in both normal and reinforced versions) - Piston - Metal Diaphragm (Bellows) With its fast-opening flow characteristics, the AOC-3000 shines with its sensitivity and precision, boasting a high adjustment accuracy with an error margin of ≤10%. Its compact design, compared to traditional heavy hammer-type pressure reducing valves, allows for easy adjustment and installation, making it a versatile choice across a multitude of industries. Whether it's for the petroleum, chemical, electric power, metallurgy, food, light textile, machinery manufacturing, or civil construction sectors, this valve is your go-to solution for gas, liquid, and steam applications. It excels in pressure reduction and stabilization, offering impeccable post-valve and pre-valve adjustment for robust performance.}
 

Actuator Features

 

Figure 1a unveils a cutting-edge mechanism designed to control the post-control valve pressure with precision and efficiency. This pressure-closed type actuator showcases a sophisticated operation: as the medium gracefully enters the valve body, guided by the directional arrow, it is skillfully released through the valve seat and spool after undergoing meticulous throttling. Meanwhile, another pathway channels through the pressure tube (with steam plus a condenser), introducing it to the actuator to act upon the diaphragm. This interaction triggers a harmonious displacement of the spool, achieving both a reduction and stabilization of pressure. When the valve's pressure escalates, the diaphragm senses the increase, compressing the spring and seamlessly driving the spool to reduce the opening, maintaining the pressure at the desired set value. Conversely, should the pressure diminish, the diaphragm's decreased force allows the spring's reaction to elegantly guide the spool, enlarging the valve opening until equilibrium is restored to the set value.

 

Figure 1b illustrates an advanced regulator engineered to master the pressure dynamics ahead of the valve with a pressure-open type action. The medium flows into the valve body, aligning with the directional arrow, before being expertly dispensed by the valve seat and spool post-throttling. Simultaneously, the pressure tube (combined with steam plus a condenser) channels into the actuator, engaging the diaphragm to prompt a precise spool displacement. This orchestrates effective pressure relief and stabilization. When the pressure before the valve intensifies, the diaphragm reacts by compressing the spring and driving the spool, expanding the valve opening until the pressure aligns with the preset level. Conversely, a pressure drop reduces the force on the diaphragm, allowing the spring's response to adjust the spool, narrowing the valve opening until the pressure regains the designated value. Should the pressure fall below the set threshold, the valve remains closed, ensuring optimal 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 as a distinguished producer of control valves, seamlessly merging manufacturing, design, sales, and exemplary service under one roof. With a strong foundation and rapid development, SNT thrives in the strategic locale of Qingdao, Shandong province, sprawling across an impressive 42,000m2, complete with state-of-the-art workshops and production facilities. As a beacon of high-tech innovation, SNT possesses independent intellectual property rights and integrates advanced management and production expertise from abroad. Employing over 150 dedicated professionals, with 15% specializing in research and development, and 30% holding graduate or higher degrees, SNT capitalizes on a robust production management team and pioneering technology to deliver superior valves. These high-quality valves serve the petrochemical, oil, and coal chemical industries, contributing to an impressive sales revenue nearing 100 billion in 2017.

SNT proudly holds the TS Special Equipment Manufacturing Certificate and ISO 9001, alongside prestigious certifications from SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. Our cutting-edge technology has earned numerous national patents, allowing us to design and produce comprehensive valve series in adherence to ANSI, API, DIN, BS, and JIS standards. By blending global valve excellence with our proprietary research, we manufacture an extensive range of valves, including GLOBE, High Pressure Boiler Blow-down Valves, High-performance Butterfly Valves, Angle-regulating Valves, and Eccentric Rotary Valves, among others.
Our diverse portfolio also includes 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. These products support varied driving forms such as manual, power-driven, pneumatic, and hydraulic. Key materials include A216WCB, A217 WC6/WC9, and A351 CF8/CF8M/CF3/CF3M. Specifications range from 1/2" to 120", with working pressures of ANSI 150# to 2500#, and temperatures from -196ºC to 1100ºC.

Steered by cutting-edge production technology and a comprehensive quality assurance system, SNT valves are integral to industries such as petrochemical, oil, steel & iron, papermaking, and power stations. Our esteemed clientele includes SINOPEC's Qilu and Qingdao branches, CNOOC Huizhou Refinery, PETROCHINA's Guangxi and Ningxia branches, and many more prestigious names.

Placing our customers' profitability at the forefront, SNT is committed to forging a legacy of unparalleled quality and a respected brand name. Our flawless quality assurance and comprehensive after-sales systems ensure that SNT valves forge successful partnerships with our clients, paving the way for shared prosperity.