Self-Operated Pressure Regulator with A351 CF3 and Zg230-450 Connections

• 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

 

When installing the AOC-3111 Self-Operated Pressure Regulating Valve in gas or low-viscosity liquid media, the preferred orientation is upright on a horizontal pipe. This ensures optimal performance and stability. However, if spatial constraints exist, the valve can be installed diagonally or even upside down. Notably, when the medium is verified as clean, part 3 of the assembly may be omitted, simplifying installation.

 

For applications involving steam or high-viscosity liquid media, it is recommended to install the AOC-3111 Self-Operated Pressure Regulating Valve upside down on a horizontal pipe. This orientation is specifically chosen to accommodate the unique properties of steam and high-viscosity liquids, ensuring efficient regulation and reliable operation.

 

Product Description

_{The AOC-3000 self-operated pressure regulating valve represents a pinnacle of innovation in energy-independent regulation. This executive marvel requires no external energy, deftly using the inherent energy of the regulated medium to autonomously achieve optimal pressure regulation. Its standout feature is its capability to function flawlessly in environments devoid of electricity or gas, epitomizing energy efficiency. Users enjoy the versatility of adjusting the pressure setting value within a customizable range. The AOC-3000 excels with three distinct valve formats to meet various process demands: AOC-3111 (single-seated), AOC-3113 (sleeve), and AOC-3114 (double-seated) self-acting pressure regulating valves. This array empowers users with the flexibility to select based on specific working conditions such as differential pressure, temperature, medium state, and leakage requirements. Furthermore, the AOC-3000 offers three robust actuator types tailored for diverse process scenarios: diaphragm (available in normal and reinforced versions), piston, and metal diaphragm (bellows). This state-of-the-art valve boasts fast-opening flow characteristics, ensuring ultra-sensitive response and precision with an adjustment accuracy error of ≤10%. Its compact design takes up minimal space compared to bulkier hammer-type valves, facilitating easy adjustments. It's a versatile choice across industries, including petroleum, chemical, electric power, metallurgy, food, light textile, machinery manufacturing, and civil construction, where it excels in the pressure regulation of gases, liquids, and steam for applications like pressure reduction, stabilization (both post- and pre-valve), and relief.}
 

Actuator Features

 

Figure 1a illustrates the sophisticated operation of our post-control valve pressure regulator, featuring a pressure-closed action mode. This remarkable piece of engineering works as follows: the medium flows graciously into the valve body along the direction of the arrow, elegantly passing through the valve seat and spool after a precise throttling process. Additionally, the medium can travel through the pressure tube, which, when dealing with steam, includes a condenser, and is then introduced into the actuator to influence the diaphragm. This action causes a seamless displacement of the spool, achieving perfect pressure reduction and stabilization. An increase in post-valve pressure enhances the force applied on the diaphragm, compressing the spring and adjusting the spool to reduce the valve opening, ensuring the pressure is meticulously maintained at the set value. Conversely, a decrease in pressure results in reduced diaphragm force, and the spring's reaction drives the spool to widen the valve opening, returning the pressure to its optimal set value.

 

Figure 1b presents the adept regulator designed to control the pressure in front of the valve, employing an innovative pressure open action mode. The mechanism functions as follows: the medium gracefully enters the valve body from the indicated arrow direction, undergoing a refined throttling process through the valve seat and spool. Additionally, the medium can pass through the pressure tube, which, when dealing with steam, incorporates a condenser, and is introduced into the actuator to activate the diaphragm. This causes the spool to elegantly shift, achieving effective pressure relief and stabilization. When the pre-valve pressure rises, increased force on the diaphragm compresses the spring, prompting the spool to enhance the valve opening until the pressure returns to its designated set value. Conversely, if the pressure diminishes, diaphragm force decreases, and the spring's reaction reduces the valve opening, restoring the pressure to the desired set value. If the pre-valve pressure falls short of the set value, the valve remains securely closed, ensuring steadfast 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: A premier producer of control valves, our company blends exceptional manufacturing, innovative design, comprehensive sales, and top-notch services seamlessly. Our foundation is set on a high starting point, fostering rapid development. Nestled in the picturesque city of Qingdao, Shandong Province, we are spread over a vast area of 42,000 square meters, boasting state-of-the-art workshops and cutting-edge production facilities. As a high-tech enterprise with proprietary intellectual property rights, we bring in advanced management and production expertise. With a dynamic workforce of over 150 dedicated professionals, our R&D specialists make up 15% of our team, while 30% of our staff are graduates or hold higher degrees. Driven by a commitment to high-quality production management and groundbreaking research and development, we manufacture high-performance valves extensively used in the petrochemical, oil, and coal chemical sectors. Our remarkable sales reached nearly 100 billion in 2017.

SNT proudly holds the TS special equipment manufacturing certificate and ISO 9001, along with the prestigious net qualification certificate from SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. We have secured numerous National Patents across various technologies. Our capability extends to designing and manufacturing a full range of valves conforming to ANSI, API, DIN, BS, and JIS standards. By integrating the superior traits of renowned global valves and infusing our independent R&D prowess, we craft an extensive array of valves. These include GLOBE, High Pressure Boiler Blow-down Valves, High-performance Butterfly Valves, Angle-regulating Valves, and Eccentric Rotary Valves, as well as T Three-eccentric Center Butterfly Valves.
Explore our diverse valve offerings including V Ball Valves, High Wear-resistant Ball Valves, High Pressure Steam Valves, Micro-flow Control Valves, Self-operated Control Valves, Cryogenic Valves, and more. Our driving forms encompass manual operation, power-driven, pneumatic, and hydraulic drive options. The core materials we employ are A216WCB, A217 WC6/WC9, A351 CF8/CF8M/CF3/CF3M, among others. We offer specifications ranging from 1/2" to 120", with working pressures of ANSI 150# to 2500#, and a vast working temperature spectrum from -196ºC to 1100ºC.

Leveraging our advanced production technology management and superior quality assurance systems, SNT valves have gained widespread acceptance in industries such as petrochemical, oil, steel & iron, paper manufacturing, and power stations. Esteemed clients include SINOPEC QILU branch, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi branch, PETROCHINA Ningxia branch, and many more across the nation.

At SNT, we prioritize our customers' profitability, fervently dedicating ourselves to establishing unparalleled quality and a reputable brand. Our comprehensive quality assurance and adept after-sales systems ensure that SNT valves stand beside our customers, crafting a path to mutual prosperity.