Due to incorrect operation of the valves, e. g. by the use of levers to increase the closing force, the handwheels occasionally broke in the past. Levers are most often used with valves which are used in cryogenic storage tanks. Usually the reason for this is an incorrect filling procedure for the cryogenic storage tanks in which moisture and then icing occurs in theregion of the thread of the valve.
HEROSE has taken these rough operating conditions into account and has optimised its handwheels with the emphasis on reducing the danger of breakage and making handling more easy:
1. The safety against breakage in the transition from the poke to the hub has been increased by a factor of 2.6.
2. The selected triangular form with outwardly curved radii has considerably improved handling and the transfer or force.
3. Replacement of older handwheels in completely ensured.
Due to the positive feedback from the market HEROSE will be exclusively equipping cryogenic valves with the new handwheels from summer 2011. The handwheels are available with outside diameters of 100, 125 and 150 in the colours white, black, blue and red.
They can be used with the following valves:
Diameter Ø 100 for:
- valves: DN 10, 15, 20 and 25
Diameter Ø 125 for:
- valves: DN 32, 40 and 50
- Gate valves: DN 25 and 40
Diameter Ø 150 for:
- Gate valves DN 50, 65 and 80
- Bellows sealed valves DN 10 to 50
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| The new handwheel design |
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