Advanced Self-Operated Pressure Regulator for Pressure Control Solutions 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

_{Introducing the AOC-3000 Self-Operated Pressure Regulating Valve - a revolutionary solution in pressure control that operates with unmatched independence and efficiency. This extraordinary product from SNT Machinery (Qingdao) Co., Ltd. leverages the power of the regulated medium itself, eliminating the need for any external energy sources, thus championing energy conservation. Ideal for settings lacking electricity or gas, the AOC-3000 offers the versatility of adjustable pressure settings within a certain range, perfectly adapting to various requirements. Crafted to meet diverse industrial needs, this valve comes in three distinct forms: the precision of the AOC-3111 single-seated variant, the robust efficiency of the AOC-3113 sleeve variant, and the dual stability of the AOC-3114 double-seated variant, all tailored to adapt to specific working conditions such as differential pressure, temperature, and medium state, as well as leakage requirements. Further enhancing its versatility, the AOC-3000 is equipped with three types of actuators: the reliable diaphragm (available in both normal and reinforced versions), the durable piston, and the innovative metal diaphragm (bellows). With fast-opening flow characteristics, it ensures responsive actions and precise adjustments, boasting an impressive error margin of ≤10%. Compact and user-friendly, it occupies minimal space compared to traditional heavy hammer pressure reducing valves, making it exceptionally easy to manage. The AOC-3000 is widely acclaimed across industries such as petroleum, chemical, electric power, metallurgy, food, light textiles, machinery manufacturing, and civil construction. It excels in applications involving pressure reduction, stabilization, and relief for gases, liquids, and steam, whether post-valve or pre-valve adjustment is required. Experience superior control and efficiency with the AOC-3000 and redefine your pressure regulation standards today!}
 

Actuator Features

 

Figure 1a showcases the intricate workings of our post-control valve pressure regulator, designed specifically for pressure-closed operation. Here's how it functions: The medium enters the valve body following the directional arrow, making its way through the valve seat and spool where a precise throttling process takes place. Concurrently, another path through the pressure tube (incorporating a condenser if the medium is steam) directs the medium to the actuator, where it influences the diaphragm. This interaction causes the spool to displace accordingly, effectively achieving pressure reduction and stabilization. Upon any increase in post-valve pressure, the diaphragm experiences increased force, compressing the spring and adjusting the spool to decrease valve opening until equilibrium at the set pressure is restored. Conversely, should the post-valve pressure decrease, the reduced force on the diaphragm allows the spring's reaction to drive the spool, enhancing valve opening until the desired pressure level is reached.

 

Figure 1b presents the regulator devoted to managing pre-valve pressure, operating under a pressure-open mode. Here's the operational principle: The medium advances into the valve body from the indicated arrow direction, undergoing efficient throttling via the valve seat and spool. Meanwhile, a separate path through the pressure tube (with a condenser when the medium is steam) feeds the medium into the actuator, targeting the diaphragm. This results in a spool shift, enabling precise pressure relief and stabilization. If pre-valve pressure surges, the increased force on the diaphragm compresses the spring, prompting the spool to enhance valve opening until the pressure subsides to the intended level. Conversely, a decline in pre-valve pressure reduces diaphragm force, allowing the spring's reaction to drive spool adjustment, minimizing valve opening until pressure levels ascend to the designated value. Should the pre-valve pressure fall below the desired threshold, the valve defaults to a closed position.
 

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 gas or low viscosity liquid applications, the AOC-3111 self-operated pressure regulating valve is typically mounted in an upright position on a horizontal pipe. In cases where space is constrained, it can be installed upside down or diagonally. If the medium is confirmed to be clean, the installation of part 3 may be omitted.

 

In environments involving steam or high viscosity liquid, the AOC-3111 self-operated pressure regulating valve is generally installed in an upside-down configuration on a horizontal pipe to ensure optimal performance.
 

Production application

 

Company Profile

SNT Machinery (Qingdao) Co., Ltd is a standout manufacturer of control valves, expertly merging production, design, sales, and services into a cohesive entity. Starting from a high vantage point, SNT has rapidly advanced, nestled in the bustling city of Qingdao, Shandong Province, spanning a 42,000 square meter area. Our facility boasts state-of-the-art workshops and cutting-edge production equipment, affirming our status as a high-tech enterprise with proprietary intellectual property and sophisticated management practices. Our team consists of over 150 dedicated professionals, including a dynamic R&D division making up 15% of our personnel, with 30% holding graduate degrees or higher. Our exceptional production management team and pioneering research drive us to manufacture high-quality valves extensively utilized in petrochemical, oil, and coal chemical sectors, achieving a remarkable sales value nearing 100 billion in 2017.

SNT proudly holds the TS Special Equipment Manufacturing Certificate and ISO 9001 certification, complemented by the net qualification from SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. Our innovative edge is further evidenced by numerous National Patents in various technologies. We design and manufacture a comprehensive range of valves adhering to global standards such as ANSI, API, DIN, BS, and JIS. By integrating the best features of renowned valves worldwide with our independent R&D, we deliver a diverse array of valves, including GLOBE, High Pressure Boiler Blow-down Valves, High-performance Butterfly Valves, Angle-regulating Valves, and Eccentric Rotary Valves, T Three-eccentric Center Butterfly Valves.
Our extensive valve selection encompasses 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 versatile driving forms such as manual, power-driven, pneumatic, and hydraulic. Our valves' main components are crafted from robust materials like A216WCB, A217 WC6/WC9, A351 CF8/CF8M/CF3/CF3M. Specifications range from 1/2" to 120" in size, with working pressures from ANSI 150# to 2500#, and operational temperatures between -196ºC and 1100ºC.

Leveraging advanced production technology management and a rigorous quality assurance system, SNT Valves are extensively deployed across industries such as petrochemicals, oil, steel & iron, paper manufacturing, and power stations. Prestigious clients like SINOPEC QILU branch, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi branch, PETROCHINA Ningxia branch, SINOPEC Changling branch, Jinan branch, among others, stand testament to our excellence.

We prioritize our users' profitability, dedicating ourselves to establishing outstanding quality and a reputable brand. Our impeccable quality assurance and comprehensive after-sales service systems ensure that SNT valves pave the way for mutual prosperity with all our partners.