Balance the pneumatic valve principle and installation and debugging

Balance of pneumatic valve has good flow characteristic, a pneumatic valve opening instructions, opening the lock and small pressure pneumatic valve for flow measurement. Use of smart meters, the input signal and pneumatic valve opening value, according to the measured differential pressure signal can be directly shows that flows through the pneumatic valve flow value, as long as in the selection and user entry on the balance of the appropriate specifications pneumatic valve, and intelligent instrument for one-time debugging, can make the flow of each user to set value.












action principle:

balanced pneumatic valve is under the working condition of hydraulic, pneumatic valve has a balancing adjustment. Generally divided into: static balance pneumatic valve, pneumatic valve, pneumatic valve differential pressure balance of dynamic balance. Balance of the pneumatic valve to use objects as medium resistance. Static balance pneumatic valve is mainly by adjusting the opening of pneumatic valve, changing the Kv value of pneumatic valves, Cv value) To the traffic regulation; Pneumatic valve and differential pressure balance of dynamic balance of pneumatic valve is mainly through the pipeline medium resistance to balance differential pressure. Balance of pneumatic valve can be installed on the water supply pipe, also can be installed on the return pipe, generally to be installed on the return pipe, especially for high temperature loop, in order to facilitate debugging, more on the return pipe is loaded. Note: the installation of static balance system of pneumatic valve, must pass a special instrument debugging, can achieve precise flow balance.
it channel changes the flow measurement precision, assist the commissioning engineers in the process of complete system balance, reduce operating difficulty, improve the accuracy of the debugging. Fine graphite cast iron of pneumatic valve body and soft sealing design ensures the STAF series static balance of pneumatic valve long service life and tight shutoff function.

installation:

1, the installation position of balance on pneumatic valve can be installed in pipes, also can be installed on the way back to the water pipe ( Each loop in the need to install a) 。 For a ring roadside heating power station, the balance in order to facilitate debugging, proposed to balance the pneumatic valve installed on the way of return pipe of water temperature is low. Balance on the main pneumatic valve, water pump should be installed in the water supply main (after Downstream of the pump) Before, in order to prevent the water pump ( Pneumatic valve after) Pressure is too low, pump cavitation phenomena may occur.
2, installed on the straight pipe
as far as possible due to balance the pneumatic valve with flow metering function, to make through the pneumatic valve before and after the water stability, guarantee the accuracy of measurement, in conditions allow should try to balance the pneumatic valve installed on the straight pipe.
3, pay attention to the new system and old system balance
when the installation has a balance of the pneumatic valve connection in the new system of original heating ( Cold) Network, must pay attention to the new system and old system water distribution balance problems, so as not to install the new system of balanced pneumatic valve ( Or modification system) Water resistance is higher than the original system, and short of water. （ 一) For the new system connected to the end of the original system; （ b） For connection in the middle position of original system, new system should be set up at the entrance of the original system balance pneumatic valve.
4, should not arbitrarily change the balance of pneumatic valve opening
of pipeline system is installed, and have the test condition, using a dedicated smart meters to debug setting of all balance pneumatic valve, pneumatic valve opening and the locking, the balance of pipe network to realize the condition. In the process of pipe network system normal operation, should not arbitrarily change the balance of pneumatic valve opening, especially should not change the opening the lock.
5, system add ( Or cancel) Loop should be readjusted when setting
in the added in the pipeline network system ( Or cancel) When the loop, besides should increase ( Or close) The balance of the corresponding pneumatic valve, in principle all balance of new pneumatic valve and the balance of the original system loop pneumatic valve shall be readjusted setting ( Branch balance in loop of the pneumatic valve don't have to readjust) 。
6。 Don't have to install by the pneumatic valve