Durable Self-Operated Pressure Regulator with Flange Connection Options for Leakage Class IV

• Customization: Available
• Temperature: Ordinary Temperature
• Certification: GS, RoHS, CE, ISO9001
• Model NO.: AOC-3111K
• Media: Gas, Oil, Water, Acid
• Standard: Standard
• Connection Mode: Flange
• Power: Pneumatic
• Material: Stainless Steel
• Type: Self-Operated
• Connections: Butt Welding/Flange
• 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

 

Product Description

_{The AOC-3000 Self-Operated Pressure Regulating Valve from SNT Machinery (Qingdao) Co., Ltd. epitomizes cutting-edge innovation in energy-efficient pressure regulation, eliminating the need for external energy sources. This remarkable product leverages the internal energy of the regulated medium, making it ideal for environments lacking access to electricity or gas, while simultaneously promoting energy conservation. Its adjustable pressure setting provides flexibility within a defined range, allowing seamless adaptation to various operational conditions. Designed with versatility in mind, the AOC-3000 is available in three distinct valve configurations to suit diverse process requirements: the AOC-3111 (single-seated), the AOC-3113 (sleeve), and the AOC-3114 (double-seated) self-acting pressure regulating valves. Users can select the most suitable model based on specific working conditions such as differential pressure, temperature, medium state, and leakage criteria. AOC-3000 valves also offer three actuator types tailored for different process scenarios: the standard and reinforced diaphragm, piston, and metal diaphragm (bellows) options. These valves boast fast-opening flow characteristics, ensuring swift response and precision with an adjustment accuracy error of just 10%. Their compact design provides a spatial advantage over traditional heavy hammer type pressure reducing valves and facilitates easy adjustment. The AOC-3000 is extensively employed across various industries, including petroleum, chemical, electric power, metallurgy, food, light textile, machinery manufacturing, and civil construction. It excels in applications involving gas, liquid, and steam pressure reduction, post-valve pressure stabilization, pre-valve pressure stabilization, and pressure relief, embodying reliability and efficiency across a broad spectrum of industrial applications.}
 

Actuator Features

 

Figure 1a showcases the innovative pressure-closed type regulator designed for precise post-control valve management. This sophisticated device operates by directing the medium through the valve body, as indicated by the arrow, and subsequently through the valve seat and spool for throttling. Another pathway introduces the medium, when steam with a condenser, into the actuator to engage the diaphragm. This action results in the appropriate spool displacement necessary for effective pressure reduction and stabilization. When the downstream pressure increases, the enhanced force on the diaphragm compresses the spring, driving the spool to narrow the valve opening, thereby reducing the pressure to a pre-set level. Conversely, a decrease in downstream pressure diminishes the diaphragm force, allowing the spring's reaction to widen the valve opening, restoring pressure to its designated setting.

 

Figure 1b illustrates the brilliance of our pressure-open type regulator, meticulously engineered to control the upstream valve pressure. The operational principle is straightforward yet effective: the medium enters the valve body following the directional arrow, undergoing throttling via the valve seat and spool. Subsequently, the medium, especially steam with a condenser, is channeled into the actuator to affect the diaphragm, facilitating the necessary spool displacement for pressure relief and stabilization. An increase in upstream pressure augments the diaphragm's force, compressing the spring and expanding the valve opening until the pressure is lowered to the desired value. In contrast, when the upstream pressure diminishes, the diaphragm force decreases, and the spring's reaction narrows the valve opening until the pressure reaches the set threshold. If the upstream pressure drops below this set value, the valve remains securely 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

Mounting Method

 

For optimal performance in gas or low-viscosity liquid applications, the AOC-3111 Self-Operated Pressure Regulating Valve should ideally be mounted upright on a horizontal pipeline. However, in instances where space constraints exist, it may be positioned upside down or at an angle. Note: If you are certain of a clean medium, component 3 installation is not necessary.

 

In scenarios involving steam or high-viscosity liquid media, the recommended installation for the AOC-3111 Self-Operated Pressure Regulating Valve is upside down on a horizontal pipeline. This positioning ensures the valve functions efficiently and effectively.
 

Production application

 

Company Profile

SNT Machinery (Qingdao) Co., Ltd. is a distinguished manufacturer specializing in control valves, skillfully integrating manufacturing, design, sales, and service into one streamlined operation. With a foundation built on excellence and rapid development, SNT showcases its prowess in Qingdao, Shandong province, spanning an impressive 42,000m2 and boasting a state-of-the-art workshop fully equipped with cutting-edge production technology. As a high-tech enterprise, we pride ourselves on possessing independent intellectual property rights and implementing advanced management and production practices from abroad. Our robust team of over 150 dedicated employees includes a dynamic R&D contingent, constituting 15% of our workforce, with 30% holding graduate or higher degrees. Fueled by our exceptional production management team and groundbreaking research and development innovations, we manufacture premium quality valves extensively utilized in petrochemical, oil, and coal chemical sectors. In 2017, our sales value impressively approached the 100 billion mark, underscoring our industry prominence.

SNT proudly holds the TS Special Equipment Manufacturing Certificate and ISO 9001 accreditation, while also securing the net qualification certificate from industry giants SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. Our portfolio boasts numerous national patents across a spectrum of technological advancements. We are adept at designing and manufacturing a comprehensive range of valves conforming to ANSI, API, DIN, BS, and JIS standards. By amalgamating the merits of renowned international valves with our proprietary research and innovation, we produce a vast array of valves, including 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 expansive valve lineup features 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. The driving mechanisms span manual, power-driven, pneumatic, and hydraulic options. For main components, we utilize superior materials such as A216 WCB, A217 WC6/WC9, A351 CF8/CF8M/CF3/CF3M, ensuring durability and performance. Specifications range from 1/2" to 120", with working pressure accommodated from ANSI 150# to 2500#, and operational temperatures spanning from -196ºC to 1100ºC.

Leveraging advanced production technology and a robust quality assurance framework, SNT Valves have earned a reputable presence across various industries, including petrochemical, oil, steel & iron, paper manufacturing, and power stations. Our esteemed clientele features notable names such as SINOPEC QILU branch, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi branch, PETROCHINA Ningxia branch, SINOPEC Changling branch, and Jinan branch, among others.

At SNT, we prioritize our customers' profitability, dedicating ourselves to delivering superior quality and establishing a reputable brand. Our impeccable quality assurance and comprehensive after-sales services ensure that SNT valves stand beside our clients, forging a path to shared prosperity and success.