Anti-Surge Technology

As gas passes through a compressor there are power, speed, process and surge limitations. 

Flow instability takes place when the compressor cannot produce enough pressure head to overcome the downstream resistance. When the downstream demand decreases, flow rates can fall below the point of stable operation. Reversal of flow will occur if the downstream pressure becomes greater than the discharge compressor pressure. This fast, high energy action will be accompanied by a large breakdown of flow patterns within the compressor, vibration, noise, and significant costly damage.

Spartan Control’s anti-surge valves are designed to protect the compressor and provide the needed responsiveness for start-up and shutdown control while maintaining quick response to small signal changes and positive position feedback. 

Fisher
The Fisher E-body globe control valve family has industry leading technical features and can be configured to handle virtually any challenging process condition. Fisher E-bodies feature multiple quick change trim choices in an unmatched variety of material choices, flow characterizations and CV selections to suit a variety of service conditions.
The Fisher D4 control valve is a rugged, compact globe valve designed primarily for high pressure throttling applications using either pneumatic or electric actuation. This valve is ideal for high pressure flow control applications utilizing throttling or on-off control.
Fisher® V260 is a full bore pipeline control valve designed for optimized pressure and flow control for ANSI 300 and 600 applications. An integral drilled attenuator controls noise and vibration from high-pressure drop liquids and gases.
The FIELDVUE DVC6200 is a digital valve controller capable of operating using 4-20 mA, HART, Fieldbus, or Profibus communication protocols. The basis of its operation is the conversion of a control signal into a pneumatic output controlling valve position.