Kết quả tìm kiếm

When purchasing a color fastness tester, you should choose a manual rubbing color fastness tester or an electric rubbing color fastness tester according to the actual situation, instead of just looking at the low price to buy. This article introduces manual and electric rubbing color fastness...

冶金行业：冶金行业采用的真空技术包括钢水真空处理、真空熔炼、真空感应熔炼、感应壳熔炼、真空电弧重熔等。其中，钢水的真空处理是钢水真空处理的一个非常重要的方面。冶金工业。该技术主要用于原子能工业、航空航天技术、海洋钻探技术、燃气发动机技术、汽车工业、飞机制造、高速列车等高科技行业，对钢铁中的某些元素进行控制和加工，并对材料的寿命和可靠性提出了越来越高的要求。...

Functionalities of a hotel PBX phone system In addition to the obvious functionalities such as receiving and sending calls, a virtual switchboard can be adapted with specific options for hotels. Do not disturb mode. You can configure the times when the customer does not want to receive calls...

Principle of vacuum brazing furnace There are two types of brazing furnace, vacuum and non vacuum. Here we mainly explain the vacuum brazing furnace. Understanding its principle will also help us to understand its use methods and precautions. Vacuum furnace brazing is of high quality and...

Development of vacuum furnace The creation and development of vacuum furnace plays a very important role in human progress. In the Shang Dynasty, a relatively perfect copper smelting furnace appeared in China. The furnace temperature reached 1200 ℃, and the inner diameter of the furnace reached...

Vacuum carburizing furnace is an improved gas carburizing process. The carburizing pressure is much lower than atmospheric pressure. The typical pressure range is 300-2500pa. The process features are as follows (1) The steel surface is kept very clean, because there is no gas interaction...

The assembly method of the combined vacuum pump is slightly different from that of the integral type. Taking the small five piece rotary vane vacuum pump as an example, it is composed of the high and low end cover plates, the high and low vacuum pump cavity components and the middle diaphragm...

The positive exhaust blower can be used in series with the vane pump to obtain a higher pumping speed and lower limit pressure under medium vacuum than when the vane pump is used alone. Roots vacuum pump, or roots blower, consists of a pair of cocoon shaped rotors mounted on two parallel shafts...

The limit pressure of vacuum pump Shortly after the vacuum pump started to work, the minimum pressure P'g appeared. The vacuum pump continues to operate. Because of the increase of vacuum pump temperature, the saturated vapor pressure and viscosity of vacuum pump oil rise and viscosity drop...

If the outlet pipe is blocked, the internal pressure of the chamber type filter press will increase continuously. When the pressure is greater than the equipment supply pressure, the filtrate will flow out from the gap of the filter plate, and then the filtering effect of the box filter press...

Mistakes in use of roots pump Roots vacuum pump must be equipped with the front stage pump, roots pump can not be used alone. Roots pump is mostly used in Roots vacuum unit, its function is to improve pumping speed and vacuum degree of the front stage pump. Roots pump should be equipped with...