Innovative Self-Operated Pressure Regulator with Zg230-450 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 is typically mounted upright on a horizontal pipeline. In instances where spatial constraints require alternative configurations, the valve may be installed upside down or diagonally. Note that if the medium is verified to be clean, the installation of part 3 can be omitted, simplifying your setup.

 

In scenarios where steam or high-viscosity liquid media are present, the AOC-3111 type self-operated pressure regulating valve should be installed upside down on a horizontal line. This configuration ensures optimal performance and reliability of the valve under demanding conditions.

 

Product Description

_{Introducing the AOC-3000 Self-Operated Pressure Regulating Valve, an exceptional executive product from SNT Machinery (Qingdao) Co., Ltd. This valve redefines efficiency, requiring no external energy as it ingeniously utilizes the medium's own energy for automatic regulation. A standout feature is its versatility, making it ideal for installation in locations devoid of electricity or gas, thereby significantly conserving energy. The system allows for flexible pressure setting adjustments within a defined range, catering to diverse needs. Tailored for various process demands, this innovative valve is offered in three distinct forms: AOC-3111, a single-seated self-acting valve; AOC-3113, a sleeve self-acting valve; and AOC-3114, a double-seated self-acting valve. Users can select the appropriate model based on specific working conditions such as differential pressure, temperature, medium state, and leakage preferences. Additionally, the AOC-3000 features three actuator types designed to meet varying process requirements: diaphragm (available in both standard and reinforced versions), piston, and metal diaphragm (bellows). With its fast-opening flow characteristics, the AOC-3000 promises swift responsiveness and precise adjustment accuracy (with an error margin of ≤10%). Compact in design compared to the bulky hammer type pressure reducing valve, it ensures ease of adjustment, making it indispensable across industries. This includes applications in petroleum, chemical, electric power, metallurgy, food, light textiles, machinery manufacturing, and civil construction. Whether it's for gas, liquid, or steam, trust this valve for pressure reduction, stabilization after the valve, pressure relief, and pre-valve stabilization, ensuring superior performance and reliability.}
 

Actuator Features

 

Figure 1a illustrates the sophisticated mechanism of our pressure-closed type post-control valve pressure regulator. As the medium journeys through the valve body, guided by the directional arrow, it undergoes precise throttling by the expertly crafted valve seat and spool, optimizing output. Furthermore, the medium traverses a pressure tube (especially when dealing with steam and a condenser), channeling into the actuator to dynamically influence the diaphragm. This interaction induces a meticulous displacement of the spool, crucial for achieving unparalleled pressure reduction and stabilization. In scenarios where post-valve pressure escalates, the diaphragm experiences increased force, compressing the spring and adjusting the spool to finely tune the valve opening, ensuring the pressure returns to its ideal set value. Inversely, a decrease in post-valve pressure results in diminished force on the diaphragm, allowing the spring's reactive force to guide the spool, expanding the valve's aperture until pressure levels ascend to the desired mark.

 

In Figure 1b, witness the brilliance of our pressure-open type regulator, designed with precision to oversee pre-valve pressure. The medium elegantly navigates into the valve body, following the directional arrow, and achieves refined output through advanced throttling by the valve seat and spool. The sophisticated use of a pressure tube (particularly with steam and a condenser) channels the medium into the actuator, impacting the diaphragm and prompting strategic spool displacement for exemplary pressure relief and stabilization. When pre-valve pressure surges, increased force on the diaphragm compresses the spring, driving the spool to enhance the valve's opening, skillfully lowering the pressure to the targeted set value. Conversely, should the pre-valve pressure wane, the diaphragm experiences reduced force, allowing the spring's counter-force to guide the spool, diminishing the valve's opening until pressure rises to the optimal set threshold. Notably, if pre-valve pressure dips below the set value, the valve remains securely closed, maintaining system integrity.
 

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 pioneer in the production of premium control valves, seamlessly integrating manufacturing, design, sales, and service under one roof. With a strategic position in the bustling city of Qingdao, within Shandong province, the company boasts an expansive 42,000 m² facility, outfitted with cutting-edge workshops and state-of-the-art production equipment. As a high-tech enterprise, SNT Machinery prides itself on possessing independent intellectual property rights, complemented by advanced management and production methodologies drawn from global excellence. Our team is 150 strong, with 15% dedicated to research and development, and an impressive 30% holding graduate or higher degrees. This dedication to excellence has empowered us to produce a vast array of high-quality valves, widely utilized in petrochemical, oil, and coal chemical industries. In 2017 alone, our sales soared to nearly 100 billion, underscoring our commitment to superior production and innovation.

SNT Machinery has proudly secured the TS Special Equipment Manufacturing Certificate and ISO 9001 accreditation, alongside achieving the net qualification certificate from industry giants such as SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. Our technological prowess is further accentuated by numerous national patents. We excel in designing and manufacturing a comprehensive range of valves conforming to ANSI, API, DIN, BS, and JIS standards. By amalgamating the strengths of world-renowned valves with our proprietary research, we have mastered the production of an extensive catalog, including GLOBE valves, High Pressure Boiler Blow-down Valves, High-performance Butterfly Valves, Angle-regulating Valves, and Eccentric Rotary Valves.
Our catalog 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, Cryogenic Valves, and more. We offer diverse driving forms such as manual, power-driven, pneumatic, and hydraulic options. Main components are crafted from premium materials like A216WCB, A217 WC6/WC9, A351 CF8/CF8M/CF3/CF3M, with specifications ranging from 1/2" to 120", working pressure from ANSI 150# to 2500#, and capable of withstanding temperatures from -196ºC to 1100ºC.

Leveraging advanced production technology, robust management systems, and a steadfast quality assurance regime, SNT Valves have become indispensable in industries such as petrochemical, oil, steel & iron, paper manufacturing, and power stations. Our esteemed clientele encompasses influential names like SINOPEC QILU and Qingdao branches, CNOOC's Huizhou Refinery, PETROCHINA's Guangxi and Ningxia branches, and many more, establishing our reputation as a trusted partner in innovation and reliability.

At SNT Machinery, we prioritize our clients' success, dedicating ourselves to upholding exemplary quality and fostering a reputable brand. Our comprehensive quality assurance and after-sales service systems ensure that SNT valves are synonymous with excellence, as we join forces with our customers to forge a path to shared prosperity and success.