Durable 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

 

In situations where the valve is employed within gas or low-viscosity liquid media, the AOC-3111 type self-operated pressure regulating valve is ideally and customarily mounted upright on a horizontal pipeline. However, should the spatial constraints necessitate, it can be installed upside down or at an angle. (If the medium is verified as clean, the installation of part 3 may be deemed unnecessary.)

 

For applications involving steam or high-viscosity liquid media, the AOC-3111 type self-operated pressure regulating valve is conventionally mounted upside down on a horizontal pipeline, ensuring optimal performance and reliability.

 

Product Description

_{Introducing the AOC-3000 Self-Operated Pressure Regulating Valve, a revolutionary product by SNT Machinery (Qingdao) Co., Ltd., designed to deliver outstanding performance without the need for external energy sources. Harnessing the inherent energy of the regulated medium, this pressure regulator stands out for its remarkable efficiency and capability to function seamlessly in power-deprived environments, significantly contributing to energy conservation. The AOC-3000 offers flexible pressure setting adjustments within a specified range, making it an adaptable choice for various applications. The AOC-3000 comes in three distinct valve configurations 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 Select the ideal configuration based on specific working conditions such as differential pressure, temperature, medium state, and leakage criteria. Moreover, the AOC-3000 offers three types of actuators, tailored to suit varied process scenarios: diaphragm (standard and reinforced), piston, and metal diaphragm (bellows). With its fast-opening flow characteristics, it ensures ultra-sensitive operation and high precision in adjustments (with an error margin of ≤10%). Compact in design, unlike the bulky heavy hammer type pressure reducing valves, it offers ease of adjustment. Widely acclaimed across industries, the AOC-3000 is extensively employed in sectors like petroleum, chemical, electric power, metallurgy, food, light textile, machinery manufacturing, and civil construction. It excels in managing pressure reduction, stabilization (both post-valve and pre-valve adjustments), relief, and stabilization for gases, liquids, and steam, ensuring optimal performance and reliability.}
 

Actuator Features

 

Figure 1a showcases the elegant engineering of the post-control valve pressure regulator, perfectly designed for the pressure-closed operational mode. The sophisticated action principle unfolds as follows: the medium gracefully flows into the valve body following the directional arrow, undergoing a meticulous process of throttling before being outputted by the valve seat and spool. In an alternate path, through the pressure tube (accompanied by a condenser when the medium is steam), it is introduced into the actuator, elegantly engaging the diaphragm. This engagement induces a precise displacement of the spool, accomplishing the dual objectives of pressure reduction and stabilization. As the pressure on the valve's output side escalates, the diaphragm's force intensifies, skillfully compressing the spring and mobilizing the spool to reduce the valve's aperture until the pressure returns to the designated level. Conversely, a decrease in downstream pressure diminishes the force on the diaphragm, allowing the spring's reactive force to expertly maneuver the spool, expanding the valve's aperture until equilibrium is restored.

 

Figure 1b illustrates the regulator's adept functionality in managing the pressure upstream of the valve, operating with a sophisticated pressure-open action mode. The operational principle is as follows: the medium enters the valve body as indicated by the arrow, undergoing a controlled throttling process before being released by the valve seat and spool. In a parallel path, facilitated by the pressure tube (and a condenser in the presence of steam), the medium is introduced to the actuator, activating the diaphragm. This activation prompts a deliberate displacement of the spool, achieving pressure relief and stabilization with precision. When upstream pressure increases, the diaphragm exerts greater force, effectively compressing the spring and expanding the valve's aperture, encouraging pressure to revert to the set parameter. In contrast, as upstream pressure diminishes, the diaphragm's force reduces, and the spring's reactive force commands the spool to constrict the valve's aperture until the pressure ascends to its intended setting. Should the upstream pressure fall below the set threshold, the valve remains persistently closed, ensuring optimal control.
 

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 premier manufacturer of control valves, seamlessly blending production, design, sales, and service. Situated in the vibrant city of Qingdao, Shandong province, our expansive facility spans 42,000 square meters and is equipped with cutting-edge workshops and production technology. As a high-tech enterprise with independent intellectual property rights, we integrate internationally acclaimed management and production techniques. Our workforce comprises over 150 dedicated professionals, with 15% specializing in R&D and 30% holding graduate or higher degrees. Driven by a commitment to innovation and quality, SNT Machinery excels in producing superior valves tailored for petrochemical, oil, and coal chemical industries, achieving a remarkable sales turnover nearing 100 billion in 2017.

SNT proudly holds the TS special equipment manufacturing certificate and ISO 9001 certification, alongside prestigious net qualification credentials from SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. Our commitment to innovation is demonstrated through numerous national patents in various technologies. We offer a comprehensive range of valves, meticulously designed and manufactured to meet ANSI, API, DIN, BS, and JIS standards. By harnessing the strengths of renowned global valve designs and fostering independent R&D, we produce a diverse array of valves, including GLOBE, high-pressure boiler blow-down valves, high-performance butterfly valves, angle-regulating valves, eccentric rotary valves, and T three-eccentric center butterfly valves.
Our extensive valve lineup also features 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 various actuation methods, including manual, power-driven, pneumatic, and hydraulic drives. Key components are crafted from top-grade materials such as A216WCB, A217 WC6/WC9, and A351 CF8/CF8M/CF3/CF3M. Specifications range from 1/2" to 120", with working pressures between ANSI 150# and 2500#, and operational temperatures from -196ºC to 1100ºC.

Leveraging our state-of-the-art production technology, management, and quality assurance systems, SNT valves have gained widespread application across industries such as petrochemical, oil, steel & iron, paper manufacturing, and power stations. Our esteemed clientele includes SINOPEC QILU branch, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi branch, PETROCHINA Ningxia branch, among others.

At SNT, we prioritize our customers' profitability, dedicating ourselves to establishing a reputation for exceptional quality and a distinguished brand. Our robust quality assurance and after-sales service systems ensure that SNT valves forge lasting partnerships with our customers, paving the way for mutual success and prosperity.