The ratio of the exhaust pressure of stainless steel hose hoop to the inlet pressure of stainless steel throat hoop is called external pressure ratio; there are various internal resistance inside the stainless steel throat hoop, such as the pressure loss of the stainless steel throat hoop inlet filter, the resistance loss of the main engine intake hole of the stainless steel hose clamp, the resistance loss of the exhaust hole of the stainless steel throat collar, and the resistance loss of the oil subsystem of the stainless steel throat collar When the pressure is lower than the atmospheric pressure, the actual exhaust pressure of the stainless steel hose is higher than the air supply pressure of the whole machine. The ratio of the actual exhaust pressure of the stainless steel hose to the actual intake pressure of the main engine is called the internal pressure ratio. The closer the internal pressure ratio of the stainless steel throat hoop to the external pressure, the more energy-saving the machine will be.

The low rotational speed of stainless steel throat hoop makes its inlet and exhaust orifice increase significantly, the air flow velocity at the orifice of stainless steel throat hoop is greatly reduced, and the internal pressure ratio of stainless steel throat hoop is reduced, which leads to the reduction of energy consumption.

During the compression process, the input power of the stainless steel throat hoop becomes heat, which makes the gas temperature of the stainless steel throat hoop rise sharply, and the stainless steel throat collar needs to consume more power to compress the high temperature gas. The ideal compression process of stainless steel hose hoop is that the pressure increases and the temperature remains unchanged. In order to reduce the temperature rise, a large amount of oil is injected into the stainless steel throat hoop during the compression process. It takes time for the heat exchange between the oil and the gas of the stainless steel hose hoop. The temperature rises slowly during the compression process of the stainless steel hose clamp, and the low temperature is always maintained. Therefore, the power consumption of the stainless steel hose clamp in the compression process is significantly lower than that of the high-speed stainless steel hose clamp, and the service life of the lubricating oil of the stainless steel throat collar is also significantly prolonged.