Application of knowledge, 2) the temperature control of pneumatic valve selection

, the application of temperature control knowledge
, pneumatic valve selection should be based on the heating medium ( Steam/hot water) , the temperature and pressure parameters and conditions ( Heat exchanger type, open/closed system) Materials, considering the pneumatic valve, flow capacity, turn off the power supply and choose to use type actuator.
, steam flow control, generally refers to the % of dry steam saturation degree. Superheated steam, steam and adiabatic exponent in the fluid viscosity flow of K table lead to corresponding changes, generally need to recalculate the examination.
medium flow and enter the square root of the pressure before and after pneumatic valve. Undue pressure is not only the noise, cavitation effect to people's health, affect the life of the enterprise, untight seal, light weight may explode, causing casualties and other major accidents.
, good temperature control temperature control curve, is the guarantee of effectively. In addition to the special requirements of fast heating system, but should try to ensure that the percentage of properties such as pneumatic valves or parabolic. Equal percentage: q/maximum urinary flow rate = residential ( L / Lmax - ） Parabolic: q/maximum urinary flow rate = / [ +（ R - ） Lunch/L] biggest
the temperature control of pneumatic valves cannot be used for a long time. Before and after the stop, shut off the pneumatic valve manually. Before installation, temperature control pneumatic valve must be installed high mesh.
, two-way pneumatic valve shall not cancel the tee pneumatic valve closure pneumatic valve base.
, the third party equipment and Siemens product of form a complete set of production when using, should pay attention to safety requirements.
direct water supply system of temperature control pneumatic valve is not to need to increase the circulation, if the heat exchanger heat storage water tank, need to supplement.
, hot water conditions, please distinguish between current hours hot water, hot water supply conditions.