Self-Operated Pressure Regulator with A351 CF8 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 optimal performance in gas or low-viscosity liquid environments, our AOC-3111 self-operated pressure regulating valve is typically installed upright on a horizontal pipe. This configuration ensures maximum efficiency and reliability. However, if space constraints are present, installation upside down or at an angle is permissible, provided the medium is verified as clean, allowing for the potential omission of part 3.

 

In the case of steam or high-viscosity liquid media, the AOC-3111 self-operated pressure regulating valve should be installed upside down on a horizontal pipe. This orientation maximizes the valve's capacity to manage high-viscosity flows efficiently and ensures robust performance across demanding applications.

 

Product Description

_{The AOC-3000 Self-Operated Pressure Regulating Valve is a groundbreaking innovation, designed to operate autonomously without the need for external power sources, harnessing the energy of the regulated medium itself. This ingenious feature makes it an ideal solution for environments lacking electrical or gas supply, offering significant energy savings. The pressure setting is highly adaptable, allowing for effortless adjustments within a specified range. Our AOC-3000 series is thoughtfully crafted in three distinct valve forms to cater to diverse process requirements: AOC-3111 (a single-seated marvel for self-acting pressure regulation), AOC-3113 (a precision-engineered sleeve variant), and AOC-3114 (a robust double-seated option). Users are empowered to select the perfect fit based on operational conditions, including differential pressure, temperature, medium state, and specific leakage needs. Further enhancing its versatility, the AOC-3000 series offers three actuator types to suit varying process demands: the reliable diaphragm (available in both standard and reinforced options), the efficient piston, and the durable metal diaphragm (bellows). Employing a fast-opening flow characteristic, this valve promises quick response and exceptional adjustment precision (with an error margin of ≤10%). Its compact design, as opposed to the bulky hammer type pressure reducing valves, ensures ease of adjustment and space efficiency. As a result, it finds widespread application across industries such as petroleum, chemical, electric power, metallurgy, food, light textile, machinery manufacturing, and civil construction, adeptly handling gas, liquid, and steam pressure reduction, stabilization (both post-valve and pre-valve adjustment), and pressure relief tasks with utmost reliability.}
 

Actuator Features

 

Figure 1a illustrates a sophisticated mechanism designed for post-control valve pressure regulation with a pressure-closed operation mode. Delve into the intricate dynamics: the medium advances into the valve body, guided by the directional arrow, and undergoes precise modulation via the valve seat and spool. This streamlined flow path, supplemented by a pressure tube (integrated with a condenser when the medium is steam), channels into the actuator, engaging the diaphragm. This engagement orchestrates a precise spool displacement, achieving flawless pressure reduction and stabilization. When the valve's post-pressure escalates, the diaphragm's force magnifies, compressing the spring and maneuvering the spool to curtail valve opening, aligning the pressure back to its optimal set value. In contrast, a dip in post-valve pressure diminishes diaphragm exertion, prompting the spring's reactive force to enhance spool activity, widening the valve opening until equilibrium is restored to the desired set pressure.

 

Figure 1b unveils the regulator adept at managing pre-valve pressure with a pressure-open operation mode. Here's how it works: the medium journeys into the valve body from the designated arrow direction, receiving meticulous throttling via the valve seat and spool. This controlled path, supported by a pressure tube (paired with a condenser when using steam), communicates with the actuator, prompting the diaphragm to initiate a targeted spool shift, ensuring pressure relief and stability. An uptick in pre-valve pressure amplifies diaphragm force, compressing the spring and orchestrating the spool to widen the valve opening until the pressure subsides to the calibrated value. Conversely, a pressure drop diminishes diaphragm influence, triggering the spring's counteraction to reduce spool movement and valve opening until pressure stabilizes at the set point. In scenarios where pre-valve pressure plummets below the set threshold, 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, a powerhouse in the realm of control valves, masterfully blends cutting-edge manufacturing, innovative design, strategic sales, and comprehensive services. Nestled in the vibrant city of Qingdao, Shandong Province, SNT spans a sprawling 42,000m², boasting a state-of-the-art workshop furnished with top-tier production equipment. As a high-tech enterprise with proprietary intellectual property rights, SNT integrates advanced global management and production methodologies. Our workforce is a dynamic mix of over 150 skilled professionals, with 15% dedicated to R&D and 30% holding graduate or higher degrees. Leveraging a robust production management team and pioneering R&D, we are proud to deliver premium valves extensively utilized in the petrochemical, oil, and coal chemical sectors. Our impressive sales hit nearly 100 billion RMB in 2017.

SNT proudly holds the prestigious TS Special Equipment Manufacturing Certificate and ISO 9001 certification. We are honored to have secured net qualification certificates from giants like SINOPEC, CNOOC, PETROCHINA, and SINOCHEM, alongside numerous national patents in cutting-edge technologies. Our expertise spans designing and manufacturing a comprehensive range of valves that adhere to standards such as ANSI, API, DIN, BS, and JIS. By blending the strengths of globally renowned valves with our independent research, we now craft a diverse array of valves, including Globe Valves, High-Pressure Boiler Blow-down Valves, High-Performance Butterfly Valves, Angle-Regulating Valves, and Eccentric Rotary Valves.
Our extensive valve lineup also features T Three-eccentric Center Butterfly Valves, 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 diverse driving forms such as manual, power-driven, pneumatic, and hydraulic. Our materials are of the highest quality, including A216 WCB, A217 WC6/WC9, A351 CF8/CF8M/CF3/CF3M, with specifications ranging from 1/2" to 120", working pressures of ANSI 150# to 2500#, and temperatures from -196ºC to 1100ºC.

Backed by advanced production technology and a rigorous quality assurance system, our SNT Valves are indispensable across petrochemical, oil, steel, iron, paper, and power industries. Our esteemed clientele includes SINOPEC QILU Branch, SINOPEC Qingdao Branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi Branch, PETROCHINA Ningxia Branch, and SINOPEC Changling Branch, among others.

At SNT, our client's prosperity is our driving force. We are committed to establishing a legacy of exceptional quality and a distinguished brand. Our robust quality assurance and after-sales systems ensure that SNT Valves consistently deliver excellence, empowering our clients to achieve unprecedented success.