Plan 66A (Leakage Detection Instrument)
Why do we use it?
- When we want to monitor the rate of leakage across a mechanical seal and alarm when the rate is high
- When a simple remote monitoring solution is required
- When there is space for a dual bushing arrangement
Advantages:
Utilizes a throttle bushing inboard of the drain port to restrict the flow of excessive leakage to drain, allowing a pressure increase to be monitored or trigger an alarm on seal failure.
General:
Leakage from the drain port should be collected and piped to a liquid recovery system or sump. Gland throttle bushings should consider the fluid properties.
Seals applicable to this plan
Type 1604
Single Stationary API 682 Metal Bellows Cartridge Seal Type C, Arrangement 1
The Type 1604 high-temperature, high-performance Type C, Arrangement 1, API 682 qualified cartridge seal is designed for high-temperature applications such...
Type 1670
API 682 Category II and Category III, Type B, Arrangement 1 Single Rotating Metal Bellows Cartridge Seal
The Type 1670 is a factory pre-set edge-welded metal bellows API 682 qualified cartridge seal with Alloy C-276 (UNS N10276)...
Type 1648 O-Ring Pusher Seal
API 682-qualified, Single Cartridge, Type "A" O-ring Pusher Seal
The Type 1648 is a high-performance single cartridge pusher seal designed to help prevent emissions leakage in most refinery applications....