Versatile Self-Operated Pressure Regulator Featuring CF3m and A351 CF8

• 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

 

In applications involving gas or low-viscosity liquid media, the AOC-3111 type self-operated pressure regulating valve is optimally installed in an upright position on a horizontal pipeline. This ensures maximum efficiency and reliability. However, when space constraints prevail, it can be adeptly mounted either upside down or at an angle. Importantly, when the medium is verified as clean, the installation of part 3 may not be necessary, offering added flexibility and convenience.

 

For steam or high-viscosity liquid media, the installation of the AOC-3111 type self-operated pressure regulating valve requires an inverted position on a horizontal pipeline. This configuration is specifically designed to accommodate such media, ensuring seamless operation and enhanced performance.

 

Product Description

_{Introducing the AOC-3000 Self-Operated Pressure Regulating Valve, a revolutionary executive product from SNT Machinery (Qingdao) Co., Ltd., that empowers you with seamless regulation without the need for any external energy. Harnessing the innate energy of the regulated medium, this cutting-edge valve excels in environments lacking electricity or gas, offering significant energy savings. Enjoy the flexibility of adjusting the pressure setting value within a specified range to suit your unique requirements. This innovative valve is available in three distinct forms to cater to diverse process demands: - 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 Choose the perfect option based on your working conditions, including differential pressure, temperature, medium state, and leakage requirements. Furthermore, the AOC-3000 is engineered with three actuator types to accommodate various process situations: - Diaphragm (Normal and Reinforced) - Piston - Metal Diaphragm (Bellows) Experience exceptional performance with its fast-opening flow characteristics, ensuring sensitive responses and precision adjustment with an error margin of ≤10%. Compact in design, this valve takes up minimal space compared to traditional heavy hammer type pressure reducing valves and offers easy adjustment. The AOC-3000 is your versatile solution for applications across industries such as petroleum, chemical, electric power, metallurgy, food, light textile, machinery manufacturing, and civil construction. Perfect for gas, liquid, and steam pressure reduction, stabilization (both post-valve and pre-valve adjustment), and pressure relief, this regulator is the pinnacle of efficiency and reliability.}
 

Actuator Features

 

Figure 1a showcases an ingenious mechanism designed to precisely control the post-control valve pressure regulator, operating with a pressure-closed action mode. The action unfolds as follows: the medium gracefully enters the valve body, following the arrow's guidance, and is elegantly outputted through the valve seat and spool post-throttling. Additionally, another pathway, facilitated by a pressure tube (which includes a condenser when dealing with steam), introduces the medium into the actuator, allowing it to interact with the diaphragm. This interaction results in a corresponding displacement of the spool, effectively achieving pressure reduction and stabilization. In scenarios where the pressure after the valve increases, the force exerted on the diaphragm intensifies, compressing the spring and driving the spool to reduce the valve opening until the pressure is elegantly balanced back to the set value. Conversely, when the pressure diminishes behind the valve, the diaphragm force decreases, and the spring's reaction force prompts the spool to expand the valve opening until the pressure harmoniously matches the predetermined level.

 

Figure 1b illustrates a sophisticated regulator crafted to masterfully control the pressure preceding the valve, operating with a pressure open type mode. The medium gracefully enters the valve body, guided by the arrow, and is splendidly outputted through the valve seat and spool post-throttling. An alternative path provided by the pressure tube (including a condenser for steam) channels the medium into the actuator to affect the diaphragm, inducing a related spool displacement, thus achieving pressure relief and stabilization. Should the pressure intensify in front of the valve, the force on the diaphragm correspondingly increases, compressing the spring and driving the spool to widen the valve opening until the pressure effortlessly returns to the set value. Similarly, when the pressure ahead of the valve decreases, the diaphragm's force lessens, and the spring's reactive force induces the spool to reduce the valve opening, ensuring the pressure elevates back to the desired set point. If the pressure in front of the valve 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 pioneering leader in the realm of control valves, integrating manufacturing, design, sales, and exceptional service under one roof. Embracing a high starting point for rapid development, our enterprise thrives in the vibrant city of Qingdao, Shandong province, sprawling across a vast 42,000 square meters. Our state-of-the-art, modern production facilities and equipment exemplify our commitment to innovation. As a prestigious high-tech enterprise, we proudly hold independent intellectual property rights and have integrated advanced management and production techniques imported from global industry leaders. Our dedicated team of over 150 employees includes a remarkable 15% of specialists in research and development, and 30% of our team members boast graduate or higher degrees. Our relentless pursuit of excellence, driven by a superior production management team and cutting-edge technology research and development, allows us to manufacture vast quantities of top-tier valves. These products are indispensable to the petrochemical, oil, and coal chemical industries, achieving an impressive sales value of nearly 100 billion in 2017.

SNT proudly holds the TS special equipment manufacturing certificate and ISO 9001 accreditation. Our prowess is further acclaimed with the net qualification certificates from prestigious organizations including SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. Our commitment to innovation is demonstrated by the numerous national patents we have secured across various technologies. Our extensive design and manufacturing capabilities enable us to produce a full spectrum of valves adhering to ANSI, API, DIN, BS, and JIS standards. By harnessing the strengths of renowned valves worldwide and incorporating our independent research and development, we offer an extensive range of products. Our portfolio includes GLOBE valves, High Pressure Boiler Blow-down Valves, High-performance Butterfly Valves, Angle-regulating Valves, Eccentric Rotary Valves, and T Three-eccentric Center Butterfly Valves.
Our engineering expertise extends to V Ball Valves, High Wear-resistant Ball Valves, High Pressure Steam Valves, Micro-flow Control Valves, Self-operated Control Valves, and Cryogenic Valves, among others. Our diverse driving mechanisms accommodate manual, power-driven, pneumatic, and hydraulic operations. The premium materials used in our main parts range from A216WCB, A217 WC6/WC9 to A351 CF8/CF8M/CF3/CF3M, ensuring durability and reliability. Our products cover specifications from 1/2" to 120", withstand working pressures from ANSI 150# to 2500#, and operate within a wide temperature range of -196ºC to 1100ºC.

Leveraging cutting-edge production technology management and a robust quality assurance system, SNT Valves serve as the backbone for numerous industries, including petrochemical, oil, steel & iron, paper manufacturing, and power stations. Our elite clientele features industry giants such as SINOPEC QILU branch, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi branch, PETROCHINA Ningxia branch, SINOPEC Qingdao Refinery, SINOPEC Changling branch, and Jinan branch, among others.

At SNT, our customers' prosperity is our utmost priority. We are deeply committed to crafting unparalleled quality and nurturing a distinguished brand. Our impeccable quality assurance and comprehensive after-sales systems ensure that SNT valves are synonymous with reliability and excellence. Together, with our valued customers, we strive to create a future of shared success and flourishing growth.