Nps 3/4′′-Nps12′′ Buttwelding Valves Single-Seat Self-Operated Pressure Regulating Valve (before control valve)

• Customization: Available
• Temperature: Ordinary Temperature
• Certification: GS, RoHS, CE, ISO9001
• Model NO.: AOC-3111K
• Standard: Standard
• Connection Mode: Flange
• Power: Pneumatic
• Material: Stainless Steel
• Type: Self-Operated
• Connections: Butt Welding/Flange
• 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

 

Product Description

_{The AOC-3000 self-operated pressure regulating valve is an executive product that does not require any external energy and is automatically regulated by using the regulated medium's own energy. The most important feature of this product is that it can be used in places where there is no electricity or gas, while saving energy. The pressure setting value can be adjusted arbitrarily within a certain range.The AOC-3000 self-acting pressure regulating valve is available in three valve forms according to the needs of various process occasions: AOC-3111 (single-seated self-acting pressure regulating valve); AOC-3113 (sleeve self-acting pressure regulating valve); AOC-3114 (double-seated self-acting pressure regulating valve). Users can choose according to the working conditions (differential pressure, temperature, medium state) and leakage requirements.AOC-3000 self-acting pressure regulating valves are available in three actuator types according to the needs of various process situations: diaphragm (normal and reinforced diaphragm), piston, metal diaphragm (bellows).AOC-3000 type self-operated pressure regulating valve adopts fast-opening flow characteristics, with sensitive action and high adjustment accuracy (error ≤10%); the valve occupies little space (compared to the heavy hammer type pressure reducing valve) and is easy to adjust, so it is widely used in petroleum, chemical, electric power, metallurgy, food, light textile, machinery manufacturing, civil construction and other equipment of gas, liquid and steam pressure reduction, pressure stabilization (for post-valve adjustment ), pressure relief, pressure stabilization (for pre-valve adjustment).}
 

 

Actuator Features

 

Figure 1a, used to control the post-control valve pressure regulator, the valve action mode for the pressure-closed type. The principle of action is as follows: the medium flows into the valve body in the direction of the arrow, and is outputted by the valve seat and spool after throttling. The other way through the pressure tube (when the medium is steam plus condenser) is introduced into the actuator act on the diaphragm, so that the spool then occurs corresponding displacement, to achieve the purpose of pressure reduction, pressure stabilization. If the pressure after the valve increases, the force on the diaphragm increases, compressing the spring and driving the spool, reducing the valve opening until the pressure after the valve drops to the set value. Similarly, if the pressure behind the valve decreases, the force acting on the diaphragm decreases, and due to the reaction force of the spring, the spool is driven to increase the opening of the valve until the pressure behind the valve rises to the set value.

 

Figure 1b, the regulator used to control the pressure in front of the valve, the valve action mode for the pressure open type. The principle of action is as follows: the medium flows into the valve body from the direction of the arrow, and is outputted by the valve seat and spool after throttling. The other way through the pressure tube (when the medium is steam plus condenser) is introduced into the actuator act on the diaphragm, so that the spool then occurs corresponding displacement, to achieve the purpose of pressure relief, pressure stabilization. If the pressure in front of the valve increases, the force on the diaphragm increases, compressing the spring and The spool is driven to increase the opening of the valve until the pressure in front of the valve drops to the set value. Similarly, if the pressure in front of the valve decreases, the force acting on the diaphragm decreases, and due to the reaction force of the spring, the spool is driven and the opening of the valve is reduced until the pressure in front of the valve rises to the set value. If the pressure in front of the valve is less than the set value, the valve is always 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

Mounting Method

 

When the valve is used in gas or low viscosity liquid media, the AOC-3111 type self-operated pressure regulating valve is normally installed upright on a horizontal pipe, and only installed upside down or diagonally when the location space does not allow. (When the medium is confirmed to be clean, part 3 may not be installed)

 

When the valve is used in steam or high viscosity liquid media, the AOC-3111 type self-operated pressure regulating valve is usually installed upside down on a horizontal pipe.

 

Production application

 

 

 

Company Profile

SNT Machinery(Qingdao) Co. , Ltd is a producer of control valves, combines manufacturing, designing, sales and services in one. It has high starting point quick development SNT is located in Qingdao, Shandong province with an area for 42000m2, equipped with modern workshop and production equipment. It is a high-tech enterprise with independent intellectual property rights and imported advanced management and production experience. Now it has more than 150 workers, and R&D specialist accounts for 15%, graduates or with higher degrees account for 30%. Depending on high quality production management team and innovative technology research and development, now we produce large quantities of high quality vales used in petrochemical, oil and coal chemical industries. We have a sales value to nearly 100billion in the year 2017.

Now SNT has got the TS special equipment manufactuuring certificate and ISO 9001, and has acquired the net qualification certificate of SINOPEC,CNOOC, PETROCHINA and SINOCHEM. And we have got the National Patent in many technologies. We can design and manufacture all series of valves according to ANSI, API, DIN, BS, JIS standards. Combining the advantages of famous valves all cross the world and with independent research and development, until now we can manufacture all kinds of valves, including GLOBE, High Pressure Boiler Blow-down Valves, High-performance Butterfly Valves, Angle-regulating Valves, Eccentric  Rotary Valves, 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, Cryogennic Valves tc,  Driving form includes manual operation, power-drinven, pneumantic and hydraulic drive. Materials for main parts are A216WCB, A217 WC6/WC9, A351 CF8/CF8M/CF3/CF3M etc. Specification 1/2"~120", working pressure ANSI 150#~2500#, working temperature -196ºC~1100ºC.

Relying on advanced production technology management and qulity assurance system, SNT Valves have been widely used in petrochemical, oil, steel&iron, paper manufacturing and power station industries. Our customers include SINOPEC QILU branch, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi branch, PETROCHINA Ningxia branch, SINOPEC Qingdao Refinery, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINC Guangxi branch, PETROCHINA Ningxia branch, SINOPEC Changling branch, Jinan branch etc.

We make user's profits as our priority, devoting ourselves to the establishment of excellent quality and good brand, Our perfect quality assurance and after-sales systems guarantee that SNT valves join hands with all our customers and creat prosperity.