Caterpillar TAURUS 70 - Manual (Page 46)

Turbomachinery Package Specification Taurus 70 Compressor Set and Mechanical Drive
• Purchaser piping and instrumentation diagram including suction and recycle
pipe size and schedule
• Anti-surge control (recycle) valve and specification sheet, unless included in
Solar's scope
• Suction and discharge gas temperature signal (100-ohm platinum resistance
temperature devices (RTDs) preferred)
Typical system scope includes the following:
• Engineering to determine the optimum control algorithms
• Control software programmed and tested for the selected gas compressor
staging
• Engineering to specify the anti-surge control valve and accessories, including
valve performance evaluation over the gas compressor performance map at
varying valve positions
• Engineering to specify the flow meter type and size
• Automatic override of manual control mode
• Evaluation of user piping and instrumentation diagram
• Documentation, including all surge control calculations and program constants
• Gas compressor flow versus differential pressure control with suction pressure
and temperature compensation
• Speed set point decoupling
• Surge detection with step valve opening
• On-screen, real-time graphic displays
• On-screen, real-time control parameter setting
• All surge control parameters are available for remote monitoring via serial link
11.1.5 Anti-Surge Recycle Valve
When included in Solar’s scope of supply, the anti-surge recycle valve is supplied as a
complete and functionally tested assembly, shipped separately for field installation. The
assembly includes the valve and the following accessories and features:
• Spring-return, diaphragm-type, pneumatic actuator
• Position transmitter with valve fully open and fully close relay outputs and 4-to-
20 mA proportional to percentage closed
• Pressure regulator
• 3-way 24-VDC solenoid valve
• Electropneumatic valve positioner
• ½-in. NPT actuator pressure port
• Carbon steel body per ASTM A352
• Interconnecting 316L stainless steel tubing and compression-type fittings
• Temperature Limits:
− Process gas: -
6.7° to 218°C (20° to 425°F)
− Ambient: -
28.9° to 60°C (
-
20° to 140°F)
The assembly requires clean, dry regulated air or natural gas, 552 to 862 kPag (80 to 125
psig),
-
28.9° to 60°C (
-
20° to 140°F), dew point
-
40°C (
-
40°F)
© 2009 Solar Turbines Incorporated. All rights reserved. TPS70CSMD/309
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