Self-Operated Pressure Regulator with Butt Welding and Zg230-450 Materials

• 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 optimum performance in gas or low-viscosity liquid environments, the AOC-3111 type self-operated pressure regulating valve by SNT Machinery (Qingdao) Co., Ltd. is ideally positioned upright on a horizontal pipe. However, should space constraints exist, alternative placements such as upside down or diagonally are permissible. Notably, if the medium remains clean, part 3 installation can be omitted.

 

In scenarios involving steam or high-viscosity liquid mediums, the AOC-3111 type self-operated pressure regulating valve is typically installed upside down on a horizontal pipe, ensuring superior efficiency and reliability in demanding conditions.

 

Product Description

_{Discover the unrivaled excellence of the AOC-3000 Self-Operated Pressure Regulating Valve, a remarkable innovation by SNT Machinery (Qingdao) Co., Ltd. This sophisticated valve operates independently, utilizing the medium's inherent energy for seamless regulation without the need for external power sources. Perfect for environments devoid of electricity or gas, this energy-efficient marvel ensures substantial savings while delivering precise pressure control. The adjustable pressure setting allows for customization within a specific range, catering to various operational scenarios. For versatile applications, the AOC-3000 is available in three distinct valve configurations: 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 option is tailored to meet different process demands, including differential pressure, temperature, medium state, and leakage specifications. Furthermore, users can select from three actuator types based on their unique requirements: - Diaphragm (Normal and Reinforced) - Piston - Metal Diaphragm (Bellows) The AOC-3000 boasts fast-opening flow characteristics, ensuring responsive action and exceptional adjustment precision with an error margin of ≤10%. Its compact design, compared to bulky alternatives like the heavy hammer-type pressure reducing valve, ensures ease of installation and adjustment. Widely acclaimed across industries, this valve is indispensable in sectors such as petroleum, chemical, electric power, metallurgy, food, light textile, machinery manufacturing, and civil construction. It excels in applications involving gas, liquid, and steam pressure reduction, stabilization (post-valve adjustment), relief, and stabilization (pre-valve adjustment), making it a versatile choice for diverse industrial needs.}
 

Actuator Features

 

Figure 1a: This ingenious mechanism is designed to precisely control the post-control valve pressure with a pressure-closed action mode. Here's how it works: The medium enters the valve body following the directional arrow and is skillfully outputted via the valve seat and spool after a careful throttling process. Simultaneously, another pathway channels the medium through a pressure tube (steam mediums incorporate a condenser) directly into the diaphragm of the actuator. This intelligent setup triggers a synchronized displacement of the spool, meticulously achieving both pressure reduction and stabilization. Should the pressure downstream of the valve increase, the resultant force on the diaphragm intensifies, compressing the spring and propelling the spool to strategically reduce the valve's opening till the desired pressure is met. Conversely, a decrease in downstream pressure weakens the force on the diaphragm. The resilient spring reacts by driving the spool to increase the valve's opening, restoring pressure to its pre-set level.

 

Figure 1b: Embrace the sophistication of controlling pre-valve pressure with this pressure open-type regulator. The operational principle is elegantly simple: as the medium flows into the valve body from the arrow-marked direction, it is expertly managed by the valve seat and spool post-throttling. In parallel, another route directs the medium through the pressure tube (steam mediums utilize a condenser) into the diaphragm of the actuator. This orchestrated setup incites precise spool displacement, fulfilling the dual purpose of pressure relief and stabilization. When the pre-valve pressure intensifies, the diaphragm force surges, compressing the spring and facilitating the spool to expand the valve's opening until the pressure decreases to the set threshold. On the flip side, a drop in pre-valve pressure reduces diaphragm force, and the spring's reactive force compels the spool to minimize the valve's opening, effectively raising the pressure to its predetermined value. Should the pre-valve pressure fall below the set benchmark, the valve remains confidently 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. stands as a pioneering producer of control valves, seamlessly integrating manufacturing, design, sales, and service. With a vision of high aspirations and rapid advancement, SNT is strategically positioned in Qingdao, Shandong province, sprawling over an impressive 42,000m2. The facility is outfitted with state-of-the-art workshops and cutting-edge production equipment. Recognized as a high-tech enterprise, the company boasts independent intellectual property rights and benefits from the infusion of advanced management and production techniques from abroad. Employing a dedicated workforce of over 150, where 15% are specialized R&D experts and 30% hold graduate or higher degrees, SNT thrives on a foundation of superior production management and innovative research and development. This enables the mass production of premium quality valves that serve the petrochemical, oil, and coal chemical sectors. In 2017, SNT achieved a remarkable sales milestone, reaching nearly 100 billion.

SNT proudly holds the TS special equipment manufacturing certificate alongside ISO 9001 accreditation. It has secured the net qualification certificate from industry giants like SINOPEC, CNOOC, PETROCHINA, and SINOCHEM and boasts numerous national patents in cutting-edge technologies. With capabilities to design and manufacture an extensive range of valves adhering to ANSI, API, DIN, BS, and JIS standards, SNT blends the strengths of renowned global valves with its own innovative R&D. Presently, our repertoire includes GLOBE, High Pressure Boiler Blow-down Valves, High-performance Butterfly Valves, Angle-regulating Valves, Eccentric Rotary Valves, T Three-eccentric Center Butterfly Valves, among others.
Our diverse product lineup features V Ball Valves, High Wear-resistant Ball Valves, High Pressure Steam Valves, Micro-flow Control Valves, Self-operated Control Valves, Cryogenic Valves, and more. The driving mechanisms range from manual operation to power-driven, pneumatic, and hydraulic systems. Our main components are forged from premium materials like A216WCB, A217 WC6/WC9, and A351 CF8/CF8M/CF3/CF3M. Specifications range from 1/2" to 120", with working pressure parameters of ANSI 150# to 2500#, and operational temperatures spanning -196ºC to 1100ºC.

With cutting-edge production technology, rigorous quality assurance systems, and reliability, SNT valves have found widespread use across petrochemical, oil, steel & iron, paper manufacturing, and power station industries. Our esteemed clientele includes industry leaders such as SINOPEC QILU branch, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi branch, PETROCHINA Ningxia branch, SINOPEC Changling branch, and Jinan branch.

At SNT, we prioritize our customers' profitability, dedicating ourselves to the creation of unparalleled quality and a distinguished brand. Our impeccable quality assurance and comprehensive after-sales support ensure that SNT valves build lasting partnerships with our clients, fostering mutual success and prosperity.