needle valve/check restrictive valve Stainless steel needle valve

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needle valve/check restrictive valve 
1.stable work performance 
2.low-cost installation 
3.control and reliability

Model L restrictive valve is used to adjust fluid flow in both directions. It can also be used to shut off fluid flow. The LA 1-way restriction valve is used to adjust accurate flow rate in one direction while allowing free reverse flow. 

needle valve is used to control the flow by changing the throttle sections or length.

needle valve is a simple flow control valve,which can constitute the throttle system with other components.


1-way restriction valve is consisted of needle valve and 1-way valve in is used to adjust the flow in one way,and reverse back freely.


1.stable work performance
2,competitive price
2,small size
4.low-cost installation
5.control and reliability

needle valve/check restrictive valve Stainless steel needle valve

needle valve/check restrictive valve Stainless steel needle valve

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Q:Solar panels for solar panels
Cancel the potentiometer to adjust the control set point, and the use of E-side memory records the work of the control point, so that set the digital, eliminating the potential deviation due to potentiometer, temperature drift, so that the control point error reduction accuracy, reliability Factor; use of digital LED display and settings, one-button operation to complete all settings, the use of extremely convenient and intuitive role is to control the work of the entire system, and the battery played a charge protection, over discharge protection role. In the larger temperature difference, the qualified controller should also have the function of temperature compensation. Other additional functions such as light control switch, time control switch should be the option of the controller;
Q:Solar water heaters in the spring, summer, autumn and winter temperatures are generally normal
Look at what you buy the tube, the average tube a few days are not necessarily high temperature. I use purple tube winter (temperature 0) a sun, can be around 40 degrees. The spring and Autumn period is above 80 degrees. If you have any questions you can ask me.
Q:Solar vacuum tube powerWhat is the power of the solar vacuum tube?
The absorption ratio of the vacuum tube is 97%. to remove the reflection of the outer tube of the vacuum tube and remove the heat dissipationThat is cloudy is 0.23KW, sunny is 0.62KW. (this data is for reference only)In addition, if it is a solar water heater, the need to multiply a coefficient 0.6.
Q:What are the renewable resources
Natural gas, oil, coal, iron ore and other mineral resources are non renewable resources, they use some less, it is impossible to re produce. Taking iron ore as an example, it is a long history of geological process that the iron element has been integrated into the industrial utilization value. They are formed in the Archean era of 26~30 billion years ago. In the ancient times, the metallogenic period was calculated by one hundred million years. On the contrary, the exploitation and consumption of minerals are very fast, and the exploitation period of a mine is only a hundred years, decades, and so on.
Q:Can solar panels work in the shade?
YES. They work in direct proportion to the amount of light falling on the surface, regardless of the source of the light. In the shade simply means reflected light instead of direct sunlight, falls on the panel, with that much less output. The earth has an albedo of about 8, which meas about 8% of the light falling on the earth is reflected. The moon has an albedo of 2, which means 2% is reflected, which is why shadows on the moon are not jet black as you might expect in an airless place. The atmosphere of the earth is why shadows are lit as they are. The conspiracy theorists thought they had something to prove the moon landings were faked with the shadows not being black. They neglected to account for reflected light from surrounding sunlit objects scattering light the shadows.
Q:Why do solar panels stop working?
Panel degradation can occur in many ways, but they generally take a long time (40yr old panels are still working...). One problem is diffusion. Since the cells are at a finite temperature and receive energy from the light, atoms in the structure can migrate around the cell. If you mix up materials from either side of the junction, you can reduce or remove the internal field and so charge separation no longer occurs, meaning no more current output. This is generally a very, very slow process. My current research is on the back contacts of cadmium-telluride solar cells. CdTe forms a junction with metals, and this junction has a built in electric field that tries to stop the current going out of the cell. This is bad! It reduces the power you get out. To overcome this, copper is sometimes added. This really cuts down on the restrictions on current, but copper is very diffusive. Within weeks at room temperature it can jiggle its way along grain boundaries (the solar cells aren't one big crystal, but a load of small grains. Our lab makes ones about 0.006mm across). Whilst copper at the back contact is good because it cancels out the effect of the field there, once it gets to the cell junction it has a worse effect. It can act as a 'recombination centre' or 'shunting pathway' - it either absorbs the free charges or takes them somewhere useless and cuts the power output. Copper is a very obvious and quick acting cause of solar panels reducing in output. I believe a similar effect is true for other cells, just with different materials. The quality of the junction degrades slowly as heat and light give energy to atoms in the lattice and make them jiggle around a bit. Once you have things out of place, performance degrades.
Q:How about solar panels?
The power we get from sun's radiation is limited by the area we receive sunshine. One square meter will have kW power from sun's radiation. For current technology, the conversion efficiency is about 8%. So one foot by three foot of solar panel only produce 80Watt. This will not be enough for your application.
Q:How Solar Panel Works ?
photons excite electrons in the silicon to a higher energy level
Q:How does solar power be converted into charging with battery car
Direct output is the solar panel in series after the direct output, because the solar panel is a constant current output, so the charger to the battery charger must choose a special constant current input type; converter output is a dedicated converter to solar The constant current output of the panel is converted to DC constant voltage output.
Q:Which one is better on the solar cells panel? The Monocrystal Solar Energy Cell or photovoltaic cell?
Since most of people I know, the function of the solar cell is for some home-based lighting and watching TV, it doesn't really matters if it is Single crystal silicon or polycrystalline silicon solar energy cell.

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