Self-Operated Pressure Regulator with CF3m Valve Body and Butt Welding

• Customization: Available
• Temperature: Ordinary Temperature
• Certification: GS, RoHS, CE, ISO9001
• Model NO.: AOC-3111B
• 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 optimal performance with gas or low viscosity liquid media, the AOC-3111 self-operated pressure regulating valve should ideally be mounted upright on a horizontal pipeline. If space constraints arise, it may be installed upside down or at an angle. (Note: If the medium is confirmed to be clean, the installation of part 3 may be omitted, ensuring a more streamlined setup.)

 

In applications involving steam or high viscosity liquid media, it is recommended that the AOC-3111 self-operated pressure regulating valve be installed upside down on a horizontal pipeline. This configuration ensures the most efficient operation for these specific media types.

 

Product Description

_{Introducing the AOC-3000, a revolutionary self-operated pressure regulating valve from SNT Machinery (Qingdao) Co., Ltd. This innovative executive solution requires no external energy sources and operates automatically by harnessing the energy of the medium being regulated. Designed for efficiency and reliability, the AOC-3000 is ideal for environments lacking electricity or gas, offering significant energy savings. With the flexibility to adjust the pressure setting value effortlessly within a specified range, this product is tailored to meet diverse process needs. Specifically engineered for versatility, the AOC-3000 is available in three distinct valve configurations to seamlessly integrate with various process requirements: 1. AOC-3111: Single-seated self-acting pressure regulating valve 2. AOC-3113: Sleeve self-acting pressure regulating valve 3. AOC-3114: Double-seated self-acting pressure regulating valve Each model is designed to cater to specific working conditions such as differential pressure, temperature, medium state, and leakage requirements, ensuring optimal performance. Further enhancing its adaptability, the AOC-3000 offers three actuator types: - Diaphragm (available in standard and reinforced options) - Piston - Metal diaphragm (bellows) The AOC-3000 boasts fast-opening flow characteristics, delivering sensitive action and exceptional adjustment precision with an error margin of ≤10%. Its compact design, in contrast to traditional heavy hammer type pressure reducing valves, allows for easy installation and adjustment. This remarkable valve finds widespread application across industries including petroleum, chemical, electric power, metallurgy, food, textile, machinery manufacturing, and civil construction. It is an indispensable tool for managing pressure reduction, stabilization, and relief in gas, liquid, and steam processes, ensuring efficiency and safety in both post-valve and pre-valve adjustments.}
 

Actuator Features

 

Figure 1a presents an innovative solution designed to expertly manage post-control valve pressure regulation. This pressure-closed type valve operates with precision: as the medium gracefully travels into the valve body following the arrow's path, it is elegantly outputted by the valve seat and spool after a meticulous throttling process. Meanwhile, an alternate route through the pressure tube (notably when dealing with steam plus condenser) directs the medium into the actuator, where it interacts with the diaphragm. This interaction prompts the spool to enact a corresponding displacement, achieving both pressure reduction and stabilization seamlessly. In an event where the post-valve pressure elevates, the enhanced force on the diaphragm compresses the spring, ingeniously driving the spool to constrict valve opening until equilibrium is restored to the set pressure value. Conversely, should the post-valve pressure diminish, the reduced diaphragm force, coupled with the spring's reaction, prompts the spool to expand the valve opening, restoring the desired pressure level.

 

Figure 1b showcases a sophisticated regulator dedicated to the artful control of pre-valve pressure, operating in a pressure open mode. The fluid medium enters the valve body gracefully, guided by the arrow, and is skillfully outputted following a precise throttling process by the valve seat and spool. Another path, via the pressure tube (particularly with steam plus condenser), introduces the medium to the actuator, where it interfaces with the diaphragm, causing the spool to undergo a calculated displacement. This ensures effective pressure relief and stabilization. If the pre-valve pressure rises, the force exerted on the diaphragm intensifies, compressing the spring and ingeniously increasing the valve opening until the pre-valve pressure harmonizes with the set value. Alternatively, a decrease in pre-valve pressure leads to diminished diaphragm force; however, the spring's counteraction drives the spool to decrease the valve opening, restoring the pressure to the set level. When the pre-valve pressure is below the 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

 

Production application

 

 

 

Company Profile

SNT Machinery (Qingdao) Co., Ltd is a distinguished manufacturer of control valves, seamlessly integrating manufacturing, design, sales, and services into one dynamic entity. Situated at a prime location in Qingdao, Shandong province, SNT spans an impressive 42,000 square meters, outfitted with state-of-the-art workshops and production facilities. As a high-tech enterprise, SNT proudly holds independent intellectual property rights while embracing advanced management and production expertise from global leaders. Our team consists of over 150 dedicated professionals, with 15% specialized in research and development, and 30% comprising graduates and individuals with higher degrees. Our exceptional production management team and pioneering technology R&D have positioned us as a leader in producing superior quality valves for the petrochemical, oil, and coal chemical sectors. Remarkably, SNT achieved a sales value nearing 100 billion in 2017.

SNT has earned an esteemed reputation by obtaining the TS special equipment manufacturing certificate and ISO 9001 accreditation, along with the net qualification certificate from industry giants such as SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. Our innovative prowess has been recognized through numerous National Patents. We excel in designing and manufacturing a comprehensive range of valves that adhere to ANSI, API, DIN, BS, and JIS standards. Our valves incorporate the global best practices and are bolstered by our independent research and development capabilities, enabling us to 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, among others.
We offer an extensive variety of valves such as V Ball Valves, High Wear-resistant Ball Valves, High Pressure Steam Valves, Micro-flow Control Valves, Self-operated Control Valves, and Cryogenic Valves, to name a few. Our driving forms encompass manual operation, power-driven, pneumatic, and hydraulic drive systems. The main components are crafted from premium materials like A216WCB, A217 WC6/WC9, A351 CF8/CF8M/CF3/CF3M, ensuring durability and reliability. Specifications range from 1/2" to 120", with working pressures from ANSI 150# to 2500#, and operational temperatures between -196ºC and 1100ºC.

Capitalizing on cutting-edge production technology, meticulous management, and a robust quality assurance system, SNT valves have garnered widespread trust and usage across diverse sectors, including petrochemical, oil, steel & iron, paper manufacturing, and power stations. Our esteemed clientele includes prominent entities such as SINOPEC QILU branch, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi branch, PETROCHINA Ningxia branch, SINOPEC Changling branch, and others, a testament to our unparalleled quality and commitment.

At SNT, customer profitability is our foremost priority. We are unwavering in our commitment to delivering unparalleled quality and cultivating a distinguished brand. Our comprehensive quality assurance and exemplary after-sales service systems ensure that SNT valves forge prosperous partnerships with all our esteemed clients, driving mutual success and prosperity.