Name: China QSK15 QSK23 QSK45 QSK60 Diesel Engine Spring Valve 3639621 For Cummins Factory - Good Price - Kyson
Brand: Kyson
SKU: 238806733

Chongqing Kyson Machinery Equipment Co., Ltd. is one of the leading manufacturers and suppliers of qsk15 qsk23 qsk45 qsk60 diesel engine spring valve 3639621 for cummins in China. With abundant experience, our factory offer high quality products made in China with competitive price. Welcome to place an order.

Description

Technical Specification & Payment and Trade Terms & Delivery and Packaging

Desc.	Spring Valve	Part No	3639621
Brand Name	Cummins, Detroit, DCEC, CCEC, XCEC etc.	Other parts	pls contact freely if you need other P/N
Engine Type	Diesel engine, Gas engine, Diesel Generator, Marine engine, Construction engine Pump engine etc.	Spare Type	Wearing spare parts, maintenance tools, repair kit, upper and lower engine gasket kit.
Condition:	Original and brand new	Applicatble industriy	Retail, marine engines, Construction works, Energy & Mining etc
Key Word:	Original spare parts and engine repair tool kits	Trade terms	FOB EXW CIF DDU DDP, Door to door is available in some countries.
Delivery time:	Most parts are in stock, bulk order based on qty	Payment	T/T, L/C, D/A, Alipay, Western Union, Paypal etc.
Place of origin	China/USA/Japan/Austria/Mexico	Package	Neutral or original packaging
Product Introduction	Usage precautions The valve spring determines the opening pressure, disc travel, and sealing stability in the closed state in the valve. If these springs have problems, it will be difficult for the entire valve to operate normally. So let's summarize the reasons for valve spring failure, so that everyone can also pay attention to and avoid it in future operations. The reasons for frequent failure of valve springs in our daily life are summarized as follows: 1. High pressure - The load borne by springs can be divided into static load, impact load, and vibration load according to the form of external force. Most spring failures are caused by large deformation and high stress caused by high loads. High stress is only suitable for static load springs, and low stress has a longer fatigue life. 2. Hydrogen embrittlement - If the spring is not subjected to appropriate hydrogen treatment after electroplating or pickling, it will cause the spring steel to become brittle and fail, but non-ferrous valve springs are not affected by this. In electroplating solutions, for the electrolysis of water molecules, there is always a certain amount of hydrogen ions present to some extent. Some of the hydrogen ions form hydrogen gas and overflow, while others infiltrate the coating and metal body in the form of hydrogen atoms, causing the toughness of the metal body and coating to decrease and become brittle, which is known as hydrogen embrittlement. Therefore, hydrogen treatment should be carried out in an oven or resistance furnace after electroplating or acid washing. The temperature and time should be determined based on the size of the spring and the thickness of the coating. Generally, the normal temperature should be between 150-250 degrees Celsius, and the insulation time should be between 0.5-5 hours. 3. Severe bending and notches - Sharp bending caused by stretching, twisting, and flat springs. The notches or scratches on flat springs can cause high stress concentration and cause failure. Therefore, the bending radius should be as large as possible and printing marks should be avoided. 4. Fatigue - Repeated deformation of the spring, especially after 106 cycles, may cause fatigue failure even under moderate stress. When operating under harsh conditions, low stress should be used. The fatigue resistance of springs should be improved. Under reasonable material selection, shot peening not only ensures a smooth surface of the spring, but also enhances its fatigue resistance, prolongs its service life, and can alleviate or even prevent surface defects such as decarburization, small pits, indentations, and cracks. Shot peening can cause minor plastic deformation on the surface, and the residual stress generated can partially offset the tensile stress generated by the spring during subsequent repeated loading, which is the root cause of crack formation.

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