SFF Series Seal Leakage Relays are designed to monitor the shaft seals of submersible pumps for leakage. These products utilize a flange-enclosure designed to be mountedon an inner door and used with back-mounted sockets. Everything needed for setup, use and troubleshooting is on the top of the unit: LED status indication and low-profile sensitivity adjustment knob.

Two output configurations are offered: an 8 pin SPDT single channel relay and an 8 pin dual channel relay (with 2 SPNO contacts) to monitor two pumps. Probes are pulsed with a DC voltage to prevent electroplating issues.

Operation:
Two wires from the relay are connected to a resistance-sensing probe in the pump seal cavity and the grounded motor housing or across two probes to monitor for seal leakage using a low-voltage DC signal. If the seal starts to leak, contaminating fluid enters the seal cavity. This lowers the resistance between the internal probe and the common connection. When the resistance drops below the user-adjustable sensitivity set-point of the relay, the output relay energizes and the LED turns Red ON. The relay output can be used to give an alarm indication of a leaking seal.

 

Features

• Monitors Submersible Pump Seals for Leakage
• Works with Pumps using Resistance Sensing Leakage Detection
• Single or Dual Channel for Monitoring 1 or 2 Pumps
• Two Adjustable Sensitivity Ranges
• Full Status Indication on Top of Unit for Easy Troubleshooting
• Low-Profile Adjustment Knob
• Flange Enclosure for Door-Mounting
• 8 Pin Back-Mounted Socket Provided with Relay

 

Downloads

Document	File Type	File Size	Download
SFF Series Datasheet	PDF	383 KB