Manual Premium Self-Operated Pressure Regulator for CF8m and A351 CF3 Applications with Stainless Steel

• 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 applications involving gas or low viscosity liquid media, the AOC-3111 type self-operated pressure regulating valve is optimally mounted in an upright position on a horizontal pipe. However, when spatial constraints dictate, it may be gracefully installed upside down or diagonally. In scenarios where the media is verified as clean, the installation of part 3 can be elegantly omitted.

 

In the realm of steam or high viscosity liquid media applications, the AOC-3111 type self-operated pressure regulating valve finds its ideal orientation by being installed upside down on a horizontal pipe, ensuring seamless operation and efficiency.

 

Product Description

_{Introducing the remarkable AOC-3000 Self-Operated Pressure Regulating Valve, a marvel of engineering that operates independently without the need for external energy sources. Harnessing the power of the medium's own energy, this valve ensures automatic regulation with unparalleled efficiency. Its standout feature is its capability to function seamlessly in environments devoid of electricity or gas, thus guaranteeing energy conservation. This flexible solution allows for pressure settings to be adjusted effortlessly within a specified range. The versatile AOC-3000 series offers three distinct valve configurations, designed to cater to diverse process requirements: choose from the AOC-3111 single-seated, AOC-3113 sleeve, or AOC-3114 double-seated self-acting pressure regulating valves. Selection is based on operational conditions such as differential pressure, temperature, medium state, and leakage demands. Additionally, the AOC-3000 series presents three actuator types to suit various application scenarios: standard diaphragm, reinforced diaphragm, piston, and metal diaphragm (bellows). Exhibiting fast-opening flow characteristics, these valves promise precise adjustments with an accuracy error margin of ≤10%. Compact and user-friendly, they outperform traditional heavy hammer pressure reducing valves. Widely embraced across industries, including petroleum, chemical, electric power, metallurgy, food, light textiles, machinery manufacturing, and civil construction, these valves excel in gas, liquid, and steam pressure reduction, stabilization-both post and pre-valve adjustments-and pressure relief applications.}
 

Actuator Features

 

Figure 1a demonstrates an exemplary mechanism designed to precisely regulate the pressure for post-control valves using a cutting-edge pressure-closed mode. The operational principle is elegantly simple yet highly effective: as the medium flows into the valve body, guided by the directional arrow, it undergoes a sophisticated throttling process, emerging through the valve seat and spool. Additionally, a secondary pathway, via the pressure tube (especially for steam mediums combined with a condenser), channels the medium into the actuator to engage with the diaphragm. This interaction causes the spool to shift, thus fulfilling the dual purpose of pressure reduction and stabilization with utmost precision. In scenarios where post-valve pressure escalates, the diaphragm experiences increased force, compressing the spring and subsequently adjusting the spool to diminish the valve's opening. This intelligent adjustment continues until the post-valve pressure aligns with the predetermined set value. Conversely, should the pressure drop behind the valve, the decreased force on the diaphragm allows the spring's reaction to take command, propelling the spool to widen the valve opening until equilibrium is restored at the desired pressure level.

 

Figure 1b illustrates a sophisticated pressure regulator specifically crafted to manage pre-valve pressure using an innovative pressure-open mode. The operational brilliance is unveiled as the medium enters the valve body, following the directional arrow, and undergoes expert throttling, exiting through the valve seat and spool. A secondary pathway, via the pressure tube (particularly when dealing with steam mediums paired with a condenser), channels the medium into the actuator, engaging with the diaphragm to initiate precise spool displacement. This refined process is engineered for optimal pressure relief and stabilization. When pre-valve pressure rises, the heightened force on the diaphragm compresses the spring, driving the spool to increase the valve's opening until the pressure subsides to the pre-set value. Conversely, a decrease in pre-valve pressure reduces diaphragm force, enabling the spring's reaction to gracefully adjust the spool, minimizing valve opening until the pressure is elevated to the desired set value. Notably, if pre-valve pressure falls below the set threshold, the valve naturally assumes a closed position, maintaining system integrity.
 

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 leader in the production of control valves, seamlessly integrating manufacturing, design, sales, and service into one cohesive unit. Positioned strategically in the bustling city of Qingdao, Shandong Province, our expansive facility spans 42,000 square meters and boasts state-of-the-art workshops and cutting-edge production equipment. We pride ourselves as a high-tech enterprise endowed with independent intellectual property rights, complemented by world-class management practices and production expertise. Our talented team exceeds 150 strong, with an impressive 15% dedicated to R&D and 30% holding graduate or higher degrees, underscoring our commitment to innovation. Leveraging a superior production management team and pioneering research capabilities, we craft a vast array of high-quality valves specifically tailored for the petrochemical, oil, and coal chemical sectors. Our remarkable sales value soared to nearly 100 billion in 2017, reflecting our significant market impact.

SNT proudly holds the TS special equipment manufacturing certificate and ISO 9001 certification, alongside accreditation from industry giants like SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. Garnering numerous national patents, our expertise enables us to design and produce a comprehensive array of valves adhering to ANSI, API, DIN, BS, and JIS standards. Fusing the exceptional features of world-renowned valves with our proprietary research and development, we offer a broad spectrum of products, 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.
Our extensive valve range also encompasses V Ball Valves, High Wear-resistant Ball Valves, High Pressure Steam Valves, Micro-flow Control Valves, Self-operated Control Valves, and Cryogenic Valves, with driving options that include manual, power-driven, pneumatic, and hydraulic mechanisms. Our materials for key components feature premium selections like A216WCB, A217 WC6/WC9, A351 CF8/CF8M/CF3/CF3M, and more. Specifications range from 1/2" to 120", with working pressures from ANSI 150# to 2500#, and working temperatures spanning -196ºC to 1100ºC.

Backed by advanced production technology management and a robust quality assurance system, SNT Valves are trusted across diverse industries, such as petrochemical, oil, steel, iron, paper manufacturing, and power generation. Our distinguished clientele includes SINOPEC QILU branch, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi branch, PETROCHINA Ningxia branch, SINOPEC Qingdao Refinery, and more. Our expansive reach and reliable performance make us a preferred choice for industry leaders.

Placing customer success at the forefront, we dedicate ourselves to delivering unparalleled quality and cultivating a reputable brand. Our exceptional quality assurance and comprehensive after-sales systems are designed to foster long-lasting partnerships, ensuring that SNT valves contribute to our customers' continued prosperity and success.