[Oil&Gas] LEAKAGE AT PACKING CASE RECIPROCATING COMPRESSOR

 

Gas leakage in a reciprocating compressor has a significant economic and environmental cost. Cook Compression now has a convenient, highly accurate, affordable way to measure the leakage thru the vent lines. Our Model 3200 Gas Gauge Flow meter is available in both an online and portable version. It measures two important process variables in one rugged instrument, gas flow rate and temperature. The Model 3200 measures gas flow rate in standard units without the need for temperature or pressure compensation. It provides isolated 4 to 20 mA and pulse outputs for flow rate, and a 4 to 20 mA output for process gas temperature. Cook Compression supplied compression fitting secures the probe in place. The inline model is available in ¨ù-inch to 6-inch sizes and includes built in flow conditioners that eliminate the need for long, straight pipe runs. The meter can be ordered with flange or NPT end connections. Both models are supplied with 316 stainless steel wetted materials standard or Hastelloy C-276 as an option.

The new Gas Gauge portable vent flow meter from Cook Compression gives you a highly accurate, easy to use way to quantify packing vent leakage. It has a measurement range of 0.06 - 6.0 SCFM, accuracy of 1% +/-0.2% full scale, and is calibrated to measure multiple gases. Armed with accurate information about packing vent leakage, you¡¯ll be able to understand how well your current compressor seals are performing and evaluate the effectiveness of alternative solutions:
1. Accurately assess leakage associated with pressure packing and unloads
2. Develop a family of leak curves that compare the performance of different packing styles
3. Quantify the difference in performance between standard packing and low leakage engineered packing
4. Calculate economic and environmental justification for installing sealing component upgrades

THEORY OF OPERATION
Cook Compression Flow meters use a Constant Temperature Differential (¥ÄT) technology. The sensor has two elements. The Reference RTD measures the gas temperature. The electronics heats the Heated Element above the gas temperature. It is the job of the electronics to maintain a constant ¥ÄT between the gas temperature and the Heated Element. As mass flow increases, the increased numbers of gas molecules remove more heat from the Heated Element. The electronics senses this temperature reduction and adds additional power to the heated element in order to maintain a constant ¥ÄT. The amount of power delivered to the Heated Element is proportional to the mass flow rate. The microprocessor then linearizes this signal to deliver a linear output.

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