The cooling method of the condensate test chamber is to use the fully enclosed French Taikang compressor. The Taikang compressor is different according to the different temperature points. The following describes the relevant parameters of the condensate test chamber compressor as follows: 1. Compressor: fully enclosed France Taikang; 2. Refrigeration mode: double-machine cascade refrigeration; 3. Condensation mode: forced air cooling; 4. Refrigerant: R404A, R23 (environmentally friendly); 5, the whole system pipeline is used for ventilation and pressure 48H leak test; 6. The heating and cooling system is completely independent; 7. Spiral refrigerant copper tube in the condensate test chamber; 8. Dry filter, refrigerant flow window, repair valve, oil separator, solenoid valve and liquid storage tank are all imported original parts.
Although there are many types of tapping screws, they all have the following similarities: Round head Tapping screw,hex tapping screw,flat head tapping screw,pan head tapping screw,truss head tapping screw Shenzhen Lanejoy Technology Co.,LTD , https://www.ccls-vaccine.com
(1) are generally made of carbonized carbon steel (accounting for 99% of total production). It can also be made of stainless steel or non-ferrous metals.
(2) The product must be heat treated. Carbon steel tapping screws must be carbonized and stainless steel tapping screws must be solution hardened. In order to make tapping screws to meet the requirements of the standard of mechanical properties and performance.
(3) The product surface hardness is high, the core toughness is good. That is, "soft inside strong outside". This is a major feature of tapping Screw performance requirements. If the surface hardness is low, it can not be screwed into the matrix; If the core toughness is poor, a twist will break, can not be used. So "inside soft outside steel" is self-tapping screw to meet the use of performance, very important requirements.
(4) The surface of the product needs surface protection treatment, generally electroplating treatment. Some product surface must be treated by phosphate (photostatting), such as wall panel self - tapping screws for photostatting.
(5) Production by cold heading process. It is recommended to use high-speed cold heading machine and high-speed wire rolling machine or high-speed planetary wire rolling machine. High speed is emphasized here to ensure product quality. Only the head of tapping screw produced by high-speed machine is well formed and the thread quality is high.