Reliance TWIP® Level Switches (Clark-Reliance)

Description

Turbine Water Induction Protection

Reliance TWIP® Level Switches help steam plants detect unwanted water before it reaches critical equipment. This TWIP level switch system can trigger alarms, trips, drains, and other protective actions when water is detected.

Steam plants can experience sudden problems from pump failures, valve failures, excessive condensation, or site flooding. Therefore, reliable water detection helps reduce risk in demanding turbine and steam system applications.

Flexible Water Detector Installation

The Water Detector mounts directly to plant equipment or piping. It also supports connection sizes, types, and orientations that suit the application. Connection options include flanged, butt weld, socket weld, plain end, and female NPT designs.

The chamber can use carbon steel, alloy steel, or stainless steel. In addition, the Water Detector can support pressures up to 3000 PSI and temperatures up to 1100°F. This gives the system strong flexibility for high-pressure steam plant service.

Conductivity Probes for Water Detection

The TWIP® System uses sensing probes inside the Water Detector chamber. These probes sit at selected levels to detect water presence. When water reaches a probe tip, it completes an electrical circuit. Then, the Control Unit activates the corresponding relay.

Clark-Reliance probe technology can detect very low conductivity water. This includes pure water with conductivity below 1 micro mho. Therefore, the system supports dependable detection in applications where water quality may vary.

Probe Options for Different Pressures

The TWIP level switch system offers several probe styles for different operating needs. T Type probes suit pressures up to 450 PSI (30 Bar). V Type probes suit pressures up to 1000 PSI (66 Bar). ZB brazed probes suit pressures up to 1800 PSI (120 Bar). FB and FSB probes suit pressures up to 3000 PSI (200 Bar).

For frequent cycling or high-pressure applications, brazed probes can provide a strong option. The FSB brazed probe uses a no-gasket construction, which helps reduce leakage risk.

Control Unit for Alarms and Protective Actions

The Control Unit contains plug-in electronic relays. These relays respond when probes contact water. Then, they can activate indicators, solenoid valves, drain valves, alarms, or other protective devices.

Control Units can sit up to 1000 feet from the Water Detector. This supports flexible installation in control rooms or other practical locations. In direct mode, water contact activates the assigned relay. In inverse mode, relays can deactivate controls to help prevent false signals during power outages.

Optional Voting Logic for Trip Reliability

Optional voting logic helps reduce false trips from one malfunctioning trip probe. The circuit can require two or three selected probes before it activates a trip. In addition, two trip probes can sit at the same level. This helps maintain one clear trip point.

This feature makes the TWIP level switch system a strong choice for critical turbine protection applications.

Optional Indicators and Power Supply Protection

Optional TWIP® Indicators provide a visual display of water presence or relay activation. Plants can install these indicators in control rooms or other key areas. The indicators use red or green LEDs and can support long service life.

The optional Dual Power Supply Diverter also improves power reliability. It can switch automatically between two power sources during an outage. As a result, the system can continue supporting plant protection when power conditions change.

FLEXPAK® Jacket for Accuracy and Safety

The optional FLEXPAK® Jacket adds two inches of insulation around the Water Detector. This helps improve system accuracy and supports personnel safety. It also removes easily for routine inspections. Because it suits outdoor service, it can support many steam plant installation environments.