Electric Self-Operated Pressure Regulator DN20-300 for Maximum Pressure Control with Carbon Steel Materials

• Customization: Available
• Temperature: Ordinary Temperature
• Certification: GS, CE, ISO9001
• Model NO.: AOC-3112
• Standard: Standard
• Connection Mode: Flange
• Power: Pneumatic
• Material: Stainless Steel
• Type: Self-Operated
• Nominal Diameter(DN): 20-300
• Length of The Receiver Tube (B): 383-2200
• Flange Face Distance L(Pn16/25/40): 150-850
• Flange Face Distance L(Pn64): 230-900
• Pn16 Weight as an Example: 26-675
• Flow Character: Quick-Open
• Body Mat.: A216wcb
• Seat Mat.: 316ss+Stl
• Stem Mat.: 316ss+Solution Treatment
• Packing: PTFE
• Bonnet Type: Bellows
• Effective Area: 1000 Cm2
• Temperature Range: -20 Degree~250 Degree
• Allowable Leakage: Class IV (Hard Seal)/Class VI (Soft Seal)
• Flange Standard: GB/T9113-2000/Jb/T79.1-94/Jb/T79.2-94/ Hg2059
• Transport Package: Wooden
• Trademark: SNT
• Origin: China
• HS Code: 8481804090
• Production Capacity: 500000PCS/Year

Product Description

Product Description

^{Introducing the AOC-3112 Model Self-Operated Pressure Regulator Valve with Pilot, a marvel of engineering that operates independently without an external energy source. This innovative Pressure Valve harnesses the energy of the regulated medium itself, channeling it through the pilot mechanism to precisely control the valve core's position. This seamless operation adjusts the flow rate with unmatched precision, ensuring that your system's downstream (Type B) or upstream (Type K) pressure remains unwaveringly constant. Type B is your go-to for scenarios where upstream pressure is notably high (0.2-0.8 MPa) and downstream pressure drops to remarkably low levels (0.5-100 KPa). Perfect for delicate scenarios such as maintaining 50 mmH2O (water column). Meanwhile, Type K is a specialist in nitrogen purging systems, perfectly attuned to integrate with nitrogen supply systems for optimal performance.}

Structure Features

<sup>1. Experience the ease of pressure setting directly on the pilot. This innovation ensures that adjustments are swift, saving both time and labor, while allowing for seamless continuous adjustments during operations. With unparalleled control accuracy, it is ideal for applications demanding the highest precision.
2. This valve outshines ordinary self-operated valves with its significantly broader adjustment range, allowing for versatile applications and adaptability to changing needs.
3. Its exceptional sensitivity allows it to detect even the smallest pressures, such as a mere 50 mm H2O, or subtle pressure variations, ensuring precise and reliable performance.
4. Boasting an exceptionally large pressure reduction ratio, this valve showcases its prowess with an upstream pressure of 0.8 MPa and a downstream marvel of 50 mm H2O, achieving a staggering pressure differential ratio of 1600.

For expert advice and applications of our comprehensive range of products, including self-operated micro-pressure regulator valves, differential pressure regulator valves, temperature regulator valves, flow regulator valves, and liquid level regulator valves, reach out to the dedicated SNT Technical Department.</sup>

Product Parameters

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
PN16 Weight (Kg) PN16 as an example			26		37				42	72		90	112	130	169		285	495		675

 

Product Materials

Part name	Materials
Valve body	A216 WCB,A351 CF8/CF3/CF8M/CF3M,ZG230-450,ZG0Cr18Ni9Ti,ZG0Cr18Ni12Mo2Ti
Spool	304SS,316SS,304LSS,316LSS,1Cr18Ni9,  0Cr18Ni12Mo2Ti (Stellite Clad welding Stellite)   PTFE
Valve seat	304SS,316SS,304LSS,316LSS,1Cr18Ni9,0Cr18Ni12Mo2Ti (Stellite Clad welding Stellite)
Stem	304SS,316SS,304LSS,316LSS,1Cr18Ni9,1Cr18Ni9,0Cr18Ni12Mo2Ti
Rubber diaphragm	Nitrile,ethylene,fluoro,oil resistant rubber ,0Cr18Ni9Ti
Membrane cover	Q235,Q235 Painting PTFE
Packing	Polytetrafluoroethylene,flexible graphite

Pressure adjustment method

^{The self-regulating pressure valve is pre-set at the factory to the desired value; however, should adjustments be necessary, users can effortlessly modify the pressure settings. To decrease the pressure, simply turn the adjusting bar clockwise using the turning piece 7 (adjusting disc). Conversely, for an increase in pressure, turn it counterclockwise. This user-friendly adjustment process ensures precise control tailored to your specific operational needs.}

Valve Maintenance

Trouble shooting	Causes of production	Exclusion methods
Unstable post-valve pressure with	1,Spool stuck by foreign objects 2,Valve stem, push rod jammed 3,Fluid inlet pipe blocked	1,Reinstallation to exclude foreign objects 2,Re-adjustment 3,unclogging
,pressure changes in front of the valve	1,Set spring stiffness is too large 2,The valve bore is too large 3,The pressure before the valve is too high, the pressure reduction ratio is too large	1,Replacement of springs 2,Replace the smaller diameter 3,The pressure before the valve and the pressure after the valve exceed 20, should be 2 levels of pressure reduction
Pressure behind the valve does not drop, always above the demand value	1,Set spring stiffness is too small 2,The valve bore is too small 3,The pressure reduction ratio is too small	1,Replacement of springs 2,Replace the larger diameter 3,Pressure before the valve: the pressure after the valve is lower than 1.25, the pressure before the valve should be increased
Pressure behind the valve does not rise, always below the demand value	1. Set spring stiffness is too small 2,The spool is stuck by a foreign object 3,Valve stem, push rod jammed 4,The spool and seat are damaged, the leakage is too large 5,The valve bore is too large	1,Replacement of springs 2,Reinstallation 3,Re-adjustment 4,Re-grind, or replace 5,Replace smaller diameter
Pressure behind the valve does not rise and always moves below the demand value	1 Set spring stiffness is too large 2,The valve bore is too small 3,The spool, stem, push rod, etc. are stuck	1,Replacement of springs 2,Replace larger diameter 3,Exclude the cause of jamming and readjust
Pre-valve pressure does not drop, always moves above the demand value	1,The valve bore is too large 2,Actuator membrane chamber capacity is too small	1 Select the proper valve diameter 2,Add a damper in the inlet pipeline

 

Instructions for Ordering

^Valve type		^Valve name
^Nominal diameter (mm)	√	^Nominal pressure (Mpa)	√
^Pressure adjustment range (Mpa)		^Control valve before or after	√
^Pressure setting value (Mpa)	√	^Name of medium	√
^Actuator type		^Medium working temperature	√
^Rated flow coefficient		^Medium state	√
^Max. pressure before valveMinimum pressure before valveNormal pressure before the valve(Mpa)	√	^Max. pressure after valveMin. pressure after valveNormal pressure after valve (Mpa)	√
^Maximum flow rateMinimum flow rateNormal flow rate		^Viscosity of liquidsLiquid densityGas density
^Material:Valve bodyValve internals		^Leakage level requirements(GB/T4213-92)
^Process piping dimensions	√	^Corrosion resistance requirements
^Flange face distance (mm) L		^Flange execution standards
^Supplied with accessories	^Condenser, receiver, mating flange, fasteners, regulator bar, pressure take-off tube, pressure take-off fitting

 

Production application

 

 

Company Profile