For coking reciprocating compressors, what is the maximum temperature the PEE valves can withstand?
Thread Content
For coking reciprocating compressors with PEEK valves, what is the maximum allowable exhaust temperature at which operation remains safe? Medium coking enriched gas!
We keep it below 145 degrees.
Shouldn’t these parameters be looked up in the data sheet provided during design? There is also the limit set for data control in one’s own operating procedures.
If you haven’t placed an order yet, it’s definitely better to choose the lowest option when selecting a model. After all, coking rich gas contains quite a few impurities, such as tar and naphthalene; at too high temperatures, these substances tend to cause coking on the gas valves and in the ring grooves. It’s best to keep it below 120. If the equipment is already in operation, there’s nothing that can be done; control the cleanliness of the gas, otherwise the vulnerable components are likely to get damaged, leading to disputes with the manufacturer.
API618 specifies that the temperature should generally not exceed 135°C, but in practice, compressor manufacturers calculate the exhaust temperature based on your process conditions when selecting the appropriate model, and this value is usually provided to you in the data sheet. If you have any issues, you should raise them at that time; otherwise, it will be difficult to make changes later.