QFS2000

Circulation in accordance with API 682 / ISO 21049: Plan 51, Plan 52
Quench fluid supply system is employed for applications in sealing systems with a wide variety of operating parameters for supplying quench fluid to double and tandem mechanical seals. They act as a convenient fluid reservoir. The exchange of fluid takes place by the thermosiphon principle or by forced circulation, for example with a pumping screw. The QFS2000 stainless steel tank is equipped with sight-glasses for monitoring the MIN/MAX level and can be fastened with a lug fixture. The leakage overflow can be selectively discharged.

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Designed for varied applications due to construction in stainless steel with borosilicate sight-glasses suitable for highly corrosive media
Reliability in operation due to the design of combined filling and ventilation filter in the hand refill pump
Construction design for operating pressure up to 200 °C
Discharge of leakage is achieved due to integrated overflow design
To monitor the fluid volume a level switch can be installed instead of sight glass

Quench fluid systems are employed:

To absorb leakage
To monitor the leakage rate (e.g. through periodic reading of the level in the tank)
To lubricate and to cool the outboard mechanical seal in a tandem arrangement
To prevent icing
To protect against dry running
To stabilize the lubricating film
To exclude air from the media in order to prevent a reaction with oxygen in the air

Install the quench fluid tank approx. 1 … 2 m (3.3 … 6.6 ft) above the mechanical seal. Install connection pipes to the mechanical seal with low flow resistance. Pipes must vent automatically in the direction of the tank. It is imperative that air pockets are prevented. The minimum filling level must always be above the connection socket at the side (in the case of the thermosiphon principle).
Quench fluid systems can be operated in two different modes:
Dead-end quench (Plan 51):
Quench fluid from an elevated tank. The characteristic feature of this principle is that no heat is dissipated by the system.
Circulation (Plan 52):
Quench fluid from an elevated tank; external tank, pressureless; thermosiphon or forced circulation. In this case heat is dissipated by the circulation. Cooling capacity by convection is minimal, however.

Designed for varied applications due to construction in stainless steel with borosilicate sight-glasses suitable for highly corrosive media
Reliability in operation due to the design of combined filling and ventilation filter in the hand refill pump
Construction design for operating pressure up to 200 °C
Discharge of leakage is achieved due to integrated overflow design
To monitor the fluid volume a level switch can be installed instead of sight glass

Quench fluid systems are employed:

To absorb leakage
To monitor the leakage rate (e.g. through periodic reading of the level in the tank)
To lubricate and to cool the outboard mechanical seal in a tandem arrangement
To prevent icing
To protect against dry running
To stabilize the lubricating film
To exclude air from the media in order to prevent a reaction with oxygen in the air

Install the quench fluid tank approx. 1 … 2 m (3.3 … 6.6 ft) above the mechanical seal. Install connection pipes to the mechanical seal with low flow resistance. Pipes must vent automatically in the direction of the tank. It is imperative that air pockets are prevented. The minimum filling level must always be above the connection socket at the side (in the case of the thermosiphon principle).
Quench fluid systems can be operated in two different modes:
Dead-end quench (Plan 51):
Quench fluid from an elevated tank. The characteristic feature of this principle is that no heat is dissipated by the system.
Circulation (Plan 52):
Quench fluid from an elevated tank; external tank, pressureless; thermosiphon or forced circulation. In this case heat is dissipated by the circulation. Cooling capacity by convection is minimal, however.