Nps3/4′′-Nps12′′ for Nominal Diameter for Flanged Versatile Self-Operated Pressure Regulator for Complex System Needs with Carbon Steel Materials

• Customization: Available
• Temperature: Ordinary Temperature
• Certification: GS, RoHS, CE, ISO9001
• Model NO.: AOC-3111K
• 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

_{Discover the AOC-3000, a revolutionary self-operated pressure regulating valve that masterfully operates without the need for any external energy sources. This cutting-edge executive product harnesses the inherent energy of the regulated medium itself, offering an eco-friendly solution tailor-made for environments lacking electricity or gas, all while prioritizing energy efficiency. With its adaptable pressure setting that can be fine-tuned within a specified range, it stands as a beacon of versatility in regulation technology. The AOC-3000 comes in three distinct valve configurations to seamlessly fit a variety of process demands: AOC-3111 (single-seated), AOC-3113 (sleeve), and AOC-3114 (double-seated) self-acting pressure regulating valves. Users can effortlessly select the ideal model based on specific working conditions, such as differential pressure, temperature, medium state, and leakage requirements. Catering to diverse process needs, these valves also offer three actuator options: the standard diaphragm, reinforced diaphragm, piston, and metal diaphragm (bellows). Engineered with swift-opening flow characteristics, they deliver sensitive operation and remarkable adjustment precision (error ≤10%), while maintaining a compact design that outshines traditional heavy hammer type pressure reducing valves. Easy to adjust and install, the AOC-3000 finds its place across various industries including petroleum, chemical, electric power, metallurgy, food, light textile, machinery manufacturing, and civil construction, proving indispensable for the regulation and stabilization of gas, liquid, and steam pressures in both pre- and post-valve scenarios.}
 

Actuator Features

 

Figure 1a illustrates a sophisticated mechanism that elegantly governs the post-control valve pressure regulator, specifically designed in a pressure-closed configuration. This intricate system operates on a seamless principle: as the medium flows gracefully into the valve body following the arrow's directive, it ventures through the valve seat and spool, undergoing precise throttling. Meanwhile, an alternate pathway via the pressure tube (especially when dealing with steam combined with a condenser) channels into the actuator, engaging the diaphragm. This interaction prompts the spool to execute a corresponding displacement, achieving a perfect balance of pressure reduction and stabilization. Should the pressure downstream of the valve surge, the diaphragm's force amplifies, compressing the spring and driving the spool to constrict the valve's aperture, ensuring the pressure retreats to the predefined level. Conversely, if the downstream pressure wanes, the diminishing force on the diaphragm, countered by the resilient spring, propels the spool to widen the valve opening until equilibrium is restored to the set pressure.

 

Figure 1b unveils a regulator meticulously crafted to command the pressure before the valve, operating in a pressure-open mode. This remarkable system follows a sophisticated method: the medium embarks on its journey into the valve body guided by the arrow, progressing through the valve seat and spool with intricate throttling. Simultaneously, via the pressure tube (especially in scenarios involving steam and condenser), the medium is introduced to the actuator, engaging the diaphragm and inducing the spool to undertake a corresponding displacement, thereby achieving precise pressure relief and stabilization. If the upstream pressure escalates, the diaphragm's force heightens, compressing the spring and compelling the spool to further open the valve, allowing the pressure to subside to the predetermined threshold. Similarly, a decrease in upstream pressure results in reduced diaphragm force, and the spring's reaction drives the spool, narrowing the valve opening until the pressure ascends to the set value. Notably, if the upstream pressure falls below the determined level, 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

Mounting Method

 

When deploying the versatile AOC-3111 type self-operated pressure regulating valve in systems handling gas or low viscosity liquid media, it is generally installed in an upright position on horizontal piping. Only consider an inverted or diagonal setup if spatial constraints demand it. For systems with confirmed clean media, optional part 3 may be omitted, enhancing installation efficiency.

 

In scenarios involving steam or high viscosity liquid media, the smart choice is to install the AOC-3111 type self-operated pressure regulating valve in an inverted position on horizontal piping. This configuration ensures optimal performance and reliability.
 

Production application

 

Company Profile

SNT Machinery (Qingdao) Co., Ltd. stands as a beacon of innovation in the realm of control valve production, seamlessly integrating manufacturing, design, sales, and service functions. With its roots firmly planted in Qingdao, Shandong Province, SNT spans an impressive 42,000 square meters, housing cutting-edge workshops and state-of-the-art production facilities. As a proud holder of high-tech enterprise status, SNT boasts a wealth of independent intellectual property rights, augmented by globally-sourced management and production expertise. Our team of over 150 dedicated professionals includes a robust 15% of R&D specialists and a remarkable 30% with graduate-level qualifications or higher. Through a potent synergy of meticulous production management and groundbreaking R&D, SNT excels in producing high-caliber valves, essential to the petrochemical, oil, and coal chemical sectors. Our stellar 2017 sales performance reached an impressive milestone, nearing a staggering 100 billion.

SNT proudly holds the prestigious TS special equipment manufacturing certificate and the ISO 9001 certification. Our credentials are further bolstered by net qualification certificates from industrial giants SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. With numerous national patents in our portfolio, we excel in designing and manufacturing a comprehensive range of valves conforming to ANSI, API, DIN, BS, and JIS standards. Drawing inspiration from globally renowned valve designs, coupled with our own pioneering R&D efforts, SNT crafts an array of valve types. These include GLOBE, High Pressure Boiler Blow-down Valves, High-performance Butterfly Valves, Angle-regulating Valves, and Eccentric Rotary Valves, among others.
Our diverse valve range also features 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. We offer versatile drive options, including manual, power-driven, pneumatic, and hydraulic operations. Our main components are constructed from premium materials such as A216WCB, A217 WC6/WC9, and A351 CF8/CF8M/CF3/CF3M. Our specifications span from 1/2" to a substantial 120", accommodating working pressures of ANSI 150# to 2500#, and operating temperatures ranging from -196ºC to 1100ºC.

Empowered by cutting-edge production technology and robust quality assurance frameworks, SNT Valves have achieved widespread adoption across industries like petrochemical, oil, steel and iron, paper manufacturing, and power stations. Our esteemed clientele includes major industry players such as SINOPEC QILU Branch, SINOPEC Qingdao Branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi Branch, PETROCHINA Ningxia Branch, and more.

Prioritizing our customers' profitability, we are dedicated to crafting exceptional quality and building a revered brand. Our comprehensive quality assurance and after-sales service systems ensure that SNT valves form enduring partnerships with our clients, driving mutual prosperity and success.