ISO 6358-2:2013 pdf free
ISO 6358-2:2013 pdf free.Pneumatic fluid power
This part of ISO 6358 specifies a discharge test and a charge test as alternative methods for testing pneumatic fluid power components that use compressible fluids, i.e. gases, and that have internal flow passages that can be either fixed or variable in size to determine their flow-rate characteristics.However, this part of ISO 6358 does not apply to components whose flow coefficient is unstable during use, i.e. components that exhibit remarkable hysteretic behaviour ( because they can contain flexible parts that deform under the flow) or that have an internal feedback phenomenon (such as regulators),or components that have a cracking pressure such as non-return (check) valves and quick-exhaust valves. In addition, it does not apply to components that exchange energy with the fluid during flow-rate measurement, e.g. cylinders, accumulators, etc.
NOTE This part of ISO 6358 does not provide a method to determine if a component has hysteretic behaviour;
ISO 6358-1 does provide such a method.
Table 1 provides a summary of which parts of ISO 6358 can be applied to various components.
The pressure-measuring tubes (items 6 and 10) and the transition connectors (items 7 and 9) shall be in accordance with ISO 6358-1. It is not necessary to have a temperature- -measuring connection in the pressure-measuring tubes because the temperature is measured in the tank.
For any locations where liquid can collect, installation of a drain separator is recommended.
The shifting time of the flow control solenoid valve (item 13) shall be sufficiently short to limit the transient time at the beginning of test data collection.
When connecting pressure measuring instruments, the dead volume shall be limited as much as possible to avoid long response time, delays, and phase lag for measurements.
The tank shall be suitably structured as shown in Figure 3 and consist of the components listed in Table 5. Dimensions of the flow port shall conform to the dimensions given in Table 6.
The tank shall conform to any local, national, and/or regional regulations and standards related to pneumatic containers.
The ratio of the height of the tank to its diameter should not exceed 2:1.
The junction of the flow port with the internal surface of the tank shall be convergent shaped so as to avoid pressure loss. The dimensions and arrangement of connection ports other than the flow port are determined by the test operator.ISO 6358-2 pdf download.
