Plan 74 (High Pressure Gas Panel)
Why do we use it?
- When an arrangement 3 plan is required
- When an inert gas (N2) supply is available at the required barrier pressure
- When a pumping scroll cannot provide sufficient flow to cool a contacting seal
- When reduced friction and heat generation is desirable
- When high seal leakage or ambient temperature swings prevent use of a vessel/accumulator piping plan
- When the shaft speed is high enough for a non-contacting gas seal and the process is compatible with gas injection
Advantages:
Lower costs and maintenance than systems used on dual pressurized liquid systems. Leakage to atmosphere is an inert gas. Zero emissions.
General:
The barrier gas is usually a pressurized nitrogen line. For higher pressure applications the system pressure can be supplemented with a gas pressure booster/amplifier.
Seals applicable to this plan
Type 2874HTC
Non-contacting, Metal Bellows, Outward Pumping Dual Pressurized Gas Lubricated Seal
Reliably sealing high and low temperature process fluids up to 425°C (800°F), the Type 2874HTC incorporates unique HTC (high-temperature, corrosion-resistant) metal bellows technology with non-contacting…
Type 2874
Non-contacting Dual Gas Seal Cartridge for Pumps
The Type 2874 is an internally pressurized, gas-lubricated, non-contacting dual cartridge seal designed for use in API, ANSI and DIN...
Type 2800MB Welded Metal Bellows Seal
Welded Metal Bellows Gas-lubricated, Non-contacting, Dual Cartridge Seal with Elastomeric Secondary Seals
The Type 2800MB is a state-of-the-art welded metal bellows, gas-lubricated, non-contacting seal for achieving 0.0 fugitive emissions for Maximum...