Self-Operated Pressure Regulator with A351 CF3 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 gas or low-viscosity liquid media, the installation of the AOC-3111 type self-operated pressure regulating valve is typically in an upright position on a horizontal pipeline. This optimal orientation ensures stable performance and ease of maintenance. However, should spatial constraints arise, the valve may be mounted upside down or at an angle, ensuring adaptability without compromising functionality. Importantly, if the medium is verified as clean, the installation of part 3 can be optional, enhancing convenience and reducing installation complexity.

 

In scenarios involving steam or high-viscosity liquid media, the AOC-3111 type self-operated pressure regulating valve finds its ideal configuration when installed upside down on a horizontal pipe. This strategic positioning is designed to optimize the handling of challenging media, offering reliable and efficient regulation under demanding conditions.

 

Product Description

_{Introducing the remarkable AOC-3000 Self-Operated Pressure Regulating Valve, a pinnacle of engineering excellence from SNT Machinery (Qingdao) Co., Ltd. This innovative product stands out in its class, requiring absolutely no external energy sources, as it ingeniously harnesses the power of the regulated medium's own energy to operate. Ideal for environments where electricity or gas is unavailable, this valve promotes energy efficiency and sustainability. The pressure setting can be effortlessly customized within a defined range, providing unmatched flexibility. The AOC-3000 is a versatile solution, offered in three distinct valve configurations to cater to various industrial demands: 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 variant is designed to match specific working conditions, such as differential pressure, temperature, and medium state, as well as leakage requirements, ensuring optimal performance. Furthermore, the AOC-3000 series boasts three different actuator types, tailored to suit diverse process contexts: diaphragm (both normal and reinforced), piston, and metal diaphragm (bellows). This adaptability is complemented by its fast-opening flow characteristics, ensuring sensitive operation and exceptional adjustment precision (with an error margin ≤10%). A compact design means it occupies minimal space, significantly less than traditional heavy hammer pressure-reducing valves, and offers ease of adjustment. Widely revered across industries, the AOC-3000 valves find use in petroleum, chemical, electric power, metallurgy, food, light textile, machinery manufacturing, civil construction, and more. They serve vital roles in applications requiring gas, liquid, and steam pressure reduction, pressure stabilization (post-valve adjustment), pressure relief, and pressure stabilization (pre-valve adjustment).}
 

Actuator Features

 

Figure 1a: Discover the remarkable efficiency of our post-control valve pressure regulator, ingeniously designed with a pressure-closed mode to seamlessly manage pressure levels. Here's how it works: The medium enters the valve body following the arrow's direction, undergoing precise throttling by the valve seat and spool for optimal output. Additionally, the pressure tube (along with an optional condenser for steam) introduces the medium to the actuator, engaging the diaphragm. This prompts a corresponding spool displacement to achieve unparalleled pressure reduction and stabilization. Should the pressure post-valve surge, the diaphragm's force intensifies, compressing the spring and adjusting the spool for reduced valve opening, restoring equilibrium to the set pressure level. Conversely, if the post-valve pressure wanes, the diaphragm's exertion diminishes, allowing the spring's reaction to enhance the spool's movement and valve opening until the desired pressure is reinstated.

 

Figure 1b: Experience the precision of our regulator tailored for controlling the pre-valve pressure, featuring an innovative pressure-open mode. Delve into its operation: The medium enters the valve body as directed by the arrow, undergoing meticulous throttling by the valve seat and spool for optimal output. Concurrently, the pressure tube (with an optional condenser for steam) channels the medium to the actuator, influencing the diaphragm for a corresponding spool displacement that ensures effective pressure relief and stabilization. An increase in pre-valve pressure heightens the diaphragm's force, compressing the spring, and expanding the spool's movement to enhance valve opening until the pressure stabilizes. Conversely, if the pre-valve pressure declines, the diaphragm's influence reduces, allowing the spring's counteraction to guide the spool and decrease valve opening until the pre-valve pressure reaches the desired level. Moreover, if the pre-valve pressure falls below the set threshold, the valve automatically closes.
 

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 premier producer of control valves, harmonizing the art of manufacturing, innovative design, sales, and exceptional services into one seamless entity. Located in the vibrant city of Qingdao, Shandong Province, our sprawling facility spans 42,000m2, featuring state-of-the-art workshops and cutting-edge production equipment. As a high-tech enterprise with independent intellectual property rights, we have embraced world-class management and production experiences. Our dynamic team comprises over 150 dedicated workers, with 15% specializing in R&D and 30% holding graduate or higher degrees. Through a relentless pursuit of quality and innovation, we craft large quantities of superior valves for the petrochemical, oil, and coal chemical sectors. Our stellar performance culminated in a remarkable sales value nearing 100 billion in 2017.

SNT proudly holds the TS Special Equipment Manufacturing Certificate and ISO 9001 accreditation, alongside the prestigious net qualification certificates from SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. We have secured numerous national patents on pioneering technologies. Our expertise enables us to design and manufacture a vast array of valves in alignment with ANSI, API, DIN, BS, and JIS standards. By merging the stellar qualities of globally renowned valves with our independent research and development, we offer an extensive range of valves, including GLOBE, High Pressure Boiler Blow-down Valves, High-performance Butterfly Valves, Angle-regulating Valves, and Eccentric Rotary Valves, among others.
Our diverse portfolio includes cutting-edge 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 valves cater to varied driving forms, such as manual operation, power-driven, pneumatic, and hydraulic drives. We utilize premium materials for the main parts, including A216 WCB, A217 WC6/WC9, A351 CF8/CF8M/CF3/CF3M, etc. Specifications range from 1/2" to 120", with working pressures from ANSI 150# to 2500# and operational temperatures spanning -196ºC to 1100ºC.

Embracing advanced production technology, meticulous management, and a comprehensive quality assurance system, SNT Valves have become indispensable in industries like petrochemical, oil, steel & iron, paper manufacturing, and power stations. Our esteemed clientele includes giants like SINOPEC QILU branch, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi branch, PETROCHINA Ningxia branch, SINOPEC Qingdao Refinery, and many others, cementing our reputation as a trusted partner.

We prioritize user profitability, dedicating ourselves to cultivating unparalleled quality and a distinguished brand reputation. Our impeccable quality assurance and after-sales systems ensure that SNT valves form enduring partnerships with our clients, leading to shared prosperity and success.