| 1. | After selecting valve size , locate inlet and outlet pressures on this chart
阀门通径选择后，在这个图表中找出进口和出口压力。 |
| 2. | Find the number on the pressure difference line and note the outlet pressure index number
找出压差线上的数字，并且注意出口压力指数。 |
| 3. | This is the lowest outlet pressure setting allowed without failing into the cavitation zone
这是不会落入空穴区的最低的出口压力设置。 |
| 4. | Calculate the pressure difference by subtracting the desired outlet pressure from the maximum inlet pressure
通过从最大进口压力减去所需要的出口压力来计算压差。 |
| 5. | Check pressure drop ( inlet - outlet ) to insure that desired outlet pressure is above the recommended lowest outlet setting to avoid cavitation conditions
止回压降（进口-出口）确保所需的出口压力处于推荐的最低出口设置点上，以避免空穴现象发生。 |
| 6. | Measuring the mass flow rate in relation to outlet pressure , the critical pressure ratio is defined as the criterion for whether the choking phenomenon takes place
此时，其流速和流量将保持一致且不受后续管路条件不同的影响，从而可起到均化喷煤量的作用。 |
| 7. | Manifold shall have safety pressure relieve valve , pressure regulators , and pressure gauges indicating inlet and outlet pressure , bleed valve ( vent valve ) and pigtail for cylinder connections
气体管路需要有安全压力释放阀门、压力调节阀门、压力表来指示气体压力。 |
| 8. | Automatic change - over valves having a maximum outlet pressure of up to and including 4 bar with a capacity of up to and including 100 kg h , and their associated safety devices for butane , propane or their mixtures
丁烷丙烷或它们的混合物用最大输出压力4巴及以下和100 kg h及以下容积的自动转换阀及其相关安全设备 |
| 9. | Low - pressure , non adjustable regulators having a maximum outlet pressure of less than or equal to 200 mbar with a capacity of less than or equal to 4 kg h , and their associated safety devices for butane , propane or their mixtures
丁烷丙烷或其混合物用的容量小于或等于4kg h的最大输出压小于或等于200mbar的不可调低压控制器及其相关的安全装置 |
| 10. | Low - pressure , non adjustable regulators having a maximum outlet pressure of less than or equal to 200 mbar , with a capacity of less than or equal to 4 kg h , and their associated safety devices for butane , propane or their mixtures
容量小于或等于4kg h最大输出压小于或等于200mbar的不可调低压调节器及其相关的用于丁烷丙烷或其混合物的安全部件 |
