Item Description
1 Storage tank (capacity 3 l)
2 Sight glass
5 Name plate
6 Filter and breather

A To the mechanical seal
B Filling via pipe connection
C Filling via filling filter



Quench fluid supply systems are used to supply single mechanical seals. They act as a convenient fluid reservoir. The QFT6000 stainless steel tank is equipped with a sight-glass for monitoring the MIN/MAX filling level and can be fastened with a lug fixture.

Supply of mechnical seal in accordance with API 682 / ISO 21049, Plan 51.


  • Sight-glass for MIN/MAX monitoring has a large indicator area
  • Filling is possible via a filling filter or a separate pipe connection
  • Combined filling and ventilation filter in the quench fluid tank for reliable operation
  • Tank made of 1.4571: high resistance to corrosive media

Functional description

Quench fluid systems (Plan 51) are employed:
  • to absorb leakage
  • to monitor the leakage rate (e.g. through periodic reading of the level in the tank)
  • 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

Product variants

Designation QFT6000/M001-D0 QFT6000A4M001-D0
Volume (liters) 3 3
Allowable pressure Pressureless Pressureless
Allowable temperature -20 °C ... +80 °C
(-4 °F ... +176 °F)
-20 °C ... +100 °C
(-4 °F ... +212 °F)
Material, tank
Material, filling filter
Glass-fibre reinforced polyamide
Material, inspection glass
Process connections
1/2" NPT (f)
API 682 3rd Edition
API 682 4th Edition

QFT6000A4M001-D0 Quench system according to API 682, 4th edition.

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