Dongfeng Power Plant Unit 4 diversion ring defect treatment after nearly two years

Web Design And Seo For www.china-webdesign.com

flow control valves - China Manufacturer

Thank you for inquiry my flow control valves, Tel:0086-574-88869817, Email:jelpc@jelpc.com

http://www.jelpc.com/key-flow-control-valves-9/

Gas Control Valve Dongfeng Power Plant Unit 4 diversion ring defect treatment after nearly two years of operation, the the deflector ring body and weld are intact, briquetting no signif icant cavitation. This fully proves that the diversion of the ring approach and welding process is correct. Processing equipment defects only established on the basis of scientific analysis, take the right process and methods to achieve the design requirements of the performance indicators, and thus to ensure the safe and stable operation of the equipment.3 way air valve

design ideas and experiment

Web Design And Seo For www.china-webdesign.com

solenoid valves manufacturers - China Manufacturer

Thank you for inquiry my solenoid valves manufacturers, Tel:0086-574-88869817, Email:jelpc@jelpc.com

http://www.jelpc.com/key-solenoid-valves-manufacturers-73/

      precision flow control valve  Based on usage analysis, the sealing between the ball and va lve seat, a seal between the metal and metal, the sphere and the valve seat material is usually carbon steel, stainless steel, Division stellite, etc., but this class of materials stopcock in prone: (1) ball and seat abrasion too fast or plastic deformation cause Mifengbuyan, liquid leak [1,3-5], â'µ ball and seat under high pressure due to adhesive wear and cold welding "effect caused" killed ", the valve can not open [2]. In accordance with the design requirements of the valve [6], the material of the sphere with the valve seat of the square bar stopcock must have a good corrosion resistance, wear resistance and a sufficient strength and toughness. In view of this, we believe that the ball and seat materials should have as high hardness and stiffness, strength and toughness with excellent corrosion resistance and meet at the same time. Accordingly, we believe that the TiC alloy material may be an ideal choice. Because, a main component of (Ti, W) C-Ni + Co + Cr TiC alloy having excellent wear resistance and corrosion resistance, while having a much higher modulus of elasticity than steel and a higher chemical stability , can effectively prevent the adhesive wear and cold welding "effect, Ti element also has a self-lubricating effect, can reduce the surface friction coefficient, reducing the resistance of the plug valve in the closed and open process, convenient operation. hydraulic adapter fittings

The waveform processing circuit is shown

Web Design And Seo For www.china-webdesign.com

Gas Cooker valve - China Manufacturer

Thank you for inquiry my Gas Cooker valve, Tel: 086-0574-86196509, E-mail: chairman@nbqianshou.com

http://www.qus-gasvalve.com/key-Gas-Cooker-valve-34/

Bbq Gas Valves  The waveform processing circuit is shown in Figure 6. Sensor output waveform shaping circuit transistor circuit reverse output, after the passing of Smectite special dual NAND gate again reverse output. In the P1 , P2 end of the output pulse square wave. reusable fitting

Experimental methods and equipment

Web Design And Seo For www.china-webdesign.com

pneumatic fitting - China Manufacturer

Thank you for inquiry my pneumatic fitting, Tel:0086-574-88869817, Email:jelpc@jelpc.com

http://www.jelpc.com/key-pneumatic-fittings-11/

     pneumatic accessory   The experiment used a wall thickness of 1 mm, diameter of 20mm, 1Cr18Ni9Ti material for the stainless steel pipe, the cutting system shown i n Figure 1. Wherein workbench by the horizontal movement axis x-axis, y-axis and the rotation axis z-axis, when the cutting of the flow curve, by the completion of the translation of the x-axis and z-axis of rotation of the workpiece relative to the movement of the laser beam, in accordance with the requirements in the round pipe cutting the flow curve. Laboratory equipment using the JHM-1GY-500 multifunction laser processing machine, wavelength of 1.06Lm, pulse frequency 1 ~ 200Hz continuously adjustable pulse width of 0.1 ~ 20.0ms continuously adjustable pulse current of 100 ~ 450A laser maximum single-pulse output energy 90J, cutting the focusing lens focal length of 75mm, the focused spot diameter is 0.15mm. Oven Gas Valve

pneumatic accessory and equipment

Web Design And Seo For www.china-webdesign.com

pneumatic fitting - China Manufacturer

Thank you for inquiry my pneumatic fitting, Tel:0086-574-88869817, Email:jelpc@jelpc.com

http://www.jelpc.com/key-pneumatic-fittings-11/

     pneumatic accessory   The experiment used a wall thickness of 1 mm, diameter of 20mm, 1Cr18Ni9Ti material for the stainless steel pipe, the cutting system shown i n Figure 1. Wherein workbench by the horizontal movement axis x-axis, y-axis and the rotation axis z-axis, when the cutting of the flow curve, by the completion of the translation of the x-axis and z-axis of rotation of the workpiece relative to the movement of the laser beam, in accordance with the requirements in the round pipe cutting the flow curve. Laboratory equipment using the JHM-1GY-500 multifunction laser processing machine, wavelength of 1.06Lm, pulse frequency 1 ~ 200Hz continuously adjustable pulse width of 0.1 ~ 20.0ms continuously adjustable pulse current of 100 ~ 450A laser maximum single-pulse output energy 90J, cutting the focusing lens focal length of 75mm, the focused spot diameter is 0.15mm. Oven Gas Valve

Pressure boundaries calculated results and evaluation

Web Design And Seo For www.china-webdesign.com

Bbq Gas Valves - China Manufacturer

Thank you for inquiry my Bbq Gas Valves, Tel: 086-0574-86196509, E-mail: chairman@nbqianshou.com

http://www.qus-gasvalve.com/key-Bbq-Gas-Valves-61/

 stainless steel flange         Valve pressure boundary analysis of objects, including the body, bonnet. The analysis and calculation of stress in accident conditions, then the checking and evaluation of the stress intensity. Body, bonnet as a pressure vessel body, is based on the stress distribution to determine the typical cross-section of the danger, according to the stress classification principle, the use of assessment of the ASME Code stress intensity. As for the bracket, stainless steel plastic material, in order to be conservative, the analysis of the third strength theory to be assessed.hydraulic testing machine

the main atx power conversion circuit at the same power

Web Design And Seo For www.china-webdesign.com

concrete nails - China Manufacturer

Thank you for inquiry my concrete nails, Tel:0086-574-6356 1872, Email:aviva@bebon-fastener.com

http://www.bebon-fastener.com/key-concrete-nails-90/

atx power core circuitry

the main atx power conversion circuit at the same power, but also "excited" circuit of double-barreled half-bridge PWM (pulse width modulation) controller uses the same tl494 control chip, but canceled the mains switch. drive pin

Just plug in the power cord, due to the cancellation of the mains switch on conversion circuit there will be +300 v DC voltage, while the auxiliary power supply voltage to tl494 work, ready to turn on the power.

atx power supply is characterized by the dead drive control tl494 chip 4 feet, when the pin voltage is +5 v tl494 9,11 feet output pulse, the two switches are off, the power is in standby state, no voltage output. 0v 4 feet, tl494 there trigger pulse to switch the power supply into the normal working state. Send tl494, all the way to the output of the auxiliary power supply and other output by the divider circuit "+5 vsb" and "ps-on" signal voltage of +5 v. , "+5 Vsb" output connected to atx motherboard power monitoring components "asked" +5 vsb ", as its operating voltage, the output can provide operating current of 10ma. Connected to the output of the power monitoring components "and" ps-on "in the trigger button switch (non-locking switch) is not pressed, ps-on" +5 v, it is connected to the positive phase input voltage comparator u1 of u1 negative phase input voltage is about 4.5v, so the input of the volt age comparator u1 +5 v sent the tl494 of "death-drive control pin" atx power in the standby. When the press motherboard power monitoring trigger button switch (mounted on the main chassis panel) ps-on goes low, the output of the voltage comparator u1 0v make atx host power on. Press the trigger button switch on the front panel, so that "ps-on" again becomes +5 v, which turn off the power. Also available procedures to control the output of the power monitoring components, so "ps-on" becomes +5 v automatically turn off the power. Win9x platform, issue the shutdown command, the atx power is automatically shut down. power point free down load

The characteristics of this structure to work in parallel as follows

Web Design And Seo For www.china-webdesign.com

concrete nails - China Manufacturer

Thank you for inquiry my concrete nails, Tel:0086-574-6356 1872, Email:aviva@bebon-fastener.com

http://www.bebon-fastener.com/key-concrete-nails-90/

The characteristics of this structure to work in parallel as follows: power supply load sharing

1) Joint sampling commonly used at home and abroad, compared to the pulse width modulation DC / DC module load cross regulation performance has been greatly improved;
2) two sets of converters with the same circuit structure, the same components used to simplify the design, production and maintenance work.
As a result identical to the two circuits of the converter, the control circuit and the protection circuit, so the circuit selection is simple, control is simple, and low cost.
For low-voltage input, the secondary is less than 50W output power, choose single-ended flyback converter circuit has the following characteristics:
1) single FET and single output rectifier diode, eliminating the need for bulky output filter inductor;
2) only need to configure the a simple clamp network elements;
3) you can use two small MMP toroid transformer to meet the miniaturization requirements.
Control circuit design, including the choice of PWM co ntroller sync pulse generator design and isolated feedback circuit design.
Based on a simplified circuit to simplify the design of the guiding ideology, select the third generation BICMOS current-mode control chip. Because of the characteristics of this chip quiescent operating current is small, and state-of-the-art leading edge blanking, making the start-up circuit of the DC / DC converter is greatly simplified. As a result of the leading edge blanking technology so that the current signal sampling circuit also be simplified.
The sync pulse generator with a relatively high transmission of the self-excited oscillator, generate about 200kHz, rectangular pulses of 50% duty cycle. Synchronization of synchronization rectangular pulse respectively supplied to two groups of the current control type converter chip synchronous terminals, in order to achieve the PWM output pulse forefront. A lot of the rectangular pulse self-excited oscillator, this article will not go in to, should be noted that in the design of the circuit, the impedance matching is needed, you can achieve synchronization purpose of the frontier. ring shank nails

the nitrided layer morphology significant difference

Web Design And Seo For www.china-webdesign.com

Gas Grill Control Valve - China Manufacturer

Thank you for inquiry my Gas Grill Control Valve, Tel: 086-0574-86196509, E-mail: chairman@nbqianshou.com

http://www.qus-gasvalve.com/key-Gas-Grill-Control-Valve-62/

teflon hose nitrided layer morphology
        Metallurgical microscope, GH4169 infiltration nitro gen layer with alloy nitride the steel 38CrMoAl the nitrided layer morphology significant difference, the boundary of the diffusion layer and the substrate found the GH4169 nitride with the furnace sample nitrided layer of detection: clear, did not find significant transition layer, and no white layer exists, gentle and 38CrMoAl nitrided layer and the substrate transition layer boundaries are not clear, and the existence of obvious white layer, as shown in Figure 1, is shown in Figure 2. Safety Gas Valve

showing the same impression on the significant differences between the two kinds of hardness prints morphology

Web Design And Seo For www.china-webdesign.com

Gas Grill Valves - China Manufacturer

Thank you for inquiry my Gas Grill Valves, Tel: 086-0574-86196509, E-mail: chairman@nbqianshou.com

http://www.qus-gasvalve.com/key-Gas-Grill-Control-Valve-62/

threaded adaptors GH4169 nitrided layer another characteristic: in metallurgical microscope under on-site observation along the junction of permeability layer and the substrate of continuous white bright line rendering its morphological similarity in electric mirror scanning pictures nitrided layer and the substrate junction at presentation The white bright linear scanning electron microscope images shown in Figure 3. Further, by the metallographic hardness gradient test images can be observed to the the GH4169 carbonitriding layer and the substrate hardness gradient is very steep. 500 times magnification in Figure 4, the hardness of the imprint is located in both the junction appears large deformation, located on the substrate side imprint is too large, the hardness value of approximately 480HV0.01; located in the nitrided layer on the imprint is too small, the hardness value about 1000HV0.01. This shows that the junction is no more obvious transition layer, showing the same impression on the significant differences between the two kinds of hardness prints morphology. Gas valve suppli er