Prevention of injector needle stuck experience

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Injector needle valve parts due to long-term high temperature and pressure in the harsh conditions of work, often back needle stuck in the valve body failure, even serious and even scrapped. Even if the couple can be repaired, but also time-consuming effort, but also can not fully guarantee the quality of their work after the repair. Experienced hands and maintenance personnel in the production of practice summed up five small experience, you can effectively prevent the needle valve is sintered and stuck. (1) In the maintenance of the injector, all parts should be carefully cleaned after decomposition. Do not just clean the needle and valve parts, while the pressure regulating spring, spring nut, adjusting screw and tappet and other parts regardless of. If these parts of the adhesion of pollutants can not be cleared, will be tapped to the top of the needle through the tappet, fleeing needle movement between needle and needle valve needle stuck. (2) Can not remove the oil return pipe. The oil return pipe will drain the diesel oil leaked from the needle valve and the valve body to the low-pressure oil circuit at work, thus avoiding the waste and ensuring the cleanliness of the fuel. If the oil return pipe is removed, not only the oozed diesel can not be reutilized, but also the dust particles in the air will enter the oil injector through the connection hole of the oil return pipe and the injector so as to easily cause the needle valve to be stuck. Some people in the removal of the oil return pipe on the injector hole blocked, this method is even more undesirable. Because when the needle valve leakage of diesel fuel overflow from the upper chamber, the hydraulic pressure is not short, eventually leading to the needle valve parts can not work, and are sintered together. (3) after the engine is installed to install high-pressure tubing, said the first low-pressure oil circuit connected, then the high-pressure tubing connected to the fuel pump, and then set the throttle handle at the maximum fuel supply position, swivel crankshaft, fuel injection pump , Until the high-pressure tubing 5-10 times after the oil-side injection, and then the high-pressure tubing out the fuel injector and connected. In doing so, can be stored in the high-pressure tubing and fuel pump out of the joint on the sewage out of the dirt to prevent dirt with high pressure oil into the injector and the needle stuck. (4) When both ends of the high-pressure tubing and the fuel injection pump and injector necklaces are spilled, the method of plugging lead wire, asbestos wire, etc. can not be adopted to implement plugging. Available thin copper skin cut into the corresponding size of the round pad, punch a hole in the middle of the pad, pad at the high-pressure hose connector. Because lead wire and asbestos wire is easily squeezed into pieces, with the high-pressure tubing into the fuel injector, causing the needle stuck. (5) Some diesel engines are equipped with a needle filter at the oil outlet of the high-pressure fuel pipe. The filter works well in the magazine of diesel oil. It is quite wrong for someone to remove the fuel injector while it is being installed. The green heart should not be removed not only installed, but also should be cleaned regularly.

PVC High Speed Rolling Door

High speed door

Hongfa fast shutter doors by the Division we learn from foreign advanced technology and equipment , and to draw on the advantages of similar products in domestic self-developed high-tech products , with insulation , insects, wind , dust, noise, anti-odor, lighting and many other features , the high speed door can be widely used in food , chemical , textile , refrigeration , electronics , printing , assembly , precision machinery , logistics . warehousing and other places , the high speed rolling shutter door Can be extremely satisfying frequent high-performance logistics and clean place with a variety of needs and saving energy , increasing air-conditioning effect , fast closing , improve operational efficiency and create a better work environment


Material Selection:
1. Frame: 2MM thicknesses cold-roll Stainless steel.
2. Motor: Germany SEW brake motor (outer), power 0.75KW, power supply 220V.
3. Control system: Imported Japan Mitsubishi converter and PLC to control of electric box (150%1HZ)
4. Opening & closing speed: 0.6-1.5m/s (adjustable).
5. Safety Device: Korea Photocell Sensor, emergency stopping reaction when sensing obstacles.
6. Curtain: France high-density polyester fiber and the surface coating processing, thickness 0.8MM, variety colors can be chose: Red, yellow, blue, green, orange, gray, white, transparent, etc. Tensile strength: 4000/3500N/5cm, tear strength 600/600N. Fire-proofing level: German standard DIN75200 Usage temperature: -30 ° C +70 ° C.
7. Wind resistant: The Aluminium alloy Reinforce Girder to increase wind resistant effect.
8. Curtain replacement function: Aluminium alloy Reinforce Girder is loaded between 2 pieces Curtain, can be replaced easily if any curtain broken, save your cost.
9. Transparent window: 1.2MM thickness transparent PVC window, size and location is up to your request, more safer.
10. Seal: Seal brush are Installed inside the guides, and the special bottom design, to fit any uneven ground.
11. Cotrolling way: Push button + radar sensor, very convenient.
12. Limiting Switch: Mechanical limiting switch, easily and exactly.
13. Emergency STOP: With emergency stop button on control panel, can stop easily by
Hand once disconnect or accident
14 Fault recovery function: All Hongfa's production is with fault recovery function, system will self-recovery after power cut off.
15. Delivery time: About 7 business days with contract and deposit confirmed.
16. Pyament item: 50% before production, and the other 50% before shipment.
17. Warranty Details: We provide 12 months warranty for all doors and accessories (except man-made disasters, Irresistible natural disasters, ect^).
We have many professional engineers with rich experience, qualified products, perfect service system, and good cooperation relationship with many famous companies.

We have the best solution for you, and we provide all the support you need to achieve optimum results, or value, or both, from whatever products you buy.
We provide 12 month warranty for all product and accessories. And custom made door size/color/material.


PVC High Speed Rolling Door, car wash doors, PVC high speed garage doors, high speed fabric garage doors, fast roll up garage doors

SHENZHEN HONGFA AUTOMATIC DOOR CO., LTD , https://www.hongfarrs.com