The role of substance that fills the thermostatic element is very significant bellows with gas filling have a large ball valve. They provide the maximum increase in the working volume of the bellows, and therefore the working stroke the brass ball valve at 1 "C. So, for example, when the temperature is lowered by 1" with respect to a given at the thermostatic element of the cone valve RT with the gas filling will rise above the saddle higher than in the case of liquid, oil or paraffin. Increased stroke valve for 1 "deals, as is known, more precise control characteristics and the bandwidth of the ball valve, and also provides less plugging of the valve.
The design of RT for two-pipe heating systems should be able to produce a preliminary hydraulic setting capacity brass ball valve. This is due, firstly, providing engineers calculated the required pressure loss in the circulation loop for hydraulic linkage heating system. Secondly, with the possibility of quick and efficient adjustment of the system after installation, because in practice when setting up heating systems often need additional activities to address the deviations from the project or design errors.
