Kaco Double Cup Piston Seals QTD

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Kaco Double cup seals are complete pistons for a pressure range up to 16 bar for sealing liquid and gaseous media. In this version, two cup seals are vulcanized to a metal washer which serves as a reinforcement for clamping onto the piston rod. One side of this washer has a rubber layer which, when installed, carries out sealing on the piston rod (fig. 44). The radial tension of the sealing lips is such that, even in the case of radial stressing of the piston rod and even if the guide clearance between the piston and cylinder is used to the full, a cylinder tolerance up to H 11 is still covered. With the sharp sealing edges, it is possible to seal off liquid media (e.g. hydropneumatic equipment, hydro-apportioning equipment).

When designing pneumatic cylinders or other pneumatic equipment we recommend, especially in the case of pure dry running, to provide for the TWIN LIP sealing pistons QTDF described on page 38.

Figure 45 shows a single-type complete piston from which the sealing lip not subjected to pressure is removed. Refer to the table on page 41for the installation dimensions of this version. As the rubber-covered side of the metal washer must always be in contact
with the rod shoulder for static sealing, make sure in the case of single-type double cup seals that the sealing lip is on the correct side of the cup seal in accordance with the desired working direction of the cylinder.

 

Item number  D d H h d1 d2 h1 h2 h3
QTD 25 • 8 NG 01 25 8 12 8,25 16 21 4,5 3,5 3
QTD 32 • 5 NG 01 32 5 17 11 16 26 5 2,5 2
QTD 32 • 8 NG 01 32 8 18,5 12,5 16 27 6,5 3,5 3
QTD 40 • 8 NG 01 40 8 19 12,5 22 33,8 6 3,5 3
QTD 40 • 10 NG 01 40 10 20,5 14 22 35 7,5 4,5 4
QTD 50 • 8 NG 01 50 8 19 12,5 25 43,6 6 3,5 3
QTD 50 • 10 NG 01 50 10 20,5 14 25 45,2 7,5 4,5 4
QTD 60 • 22 NG 01 60 22 21 14 37 52,8 7 4,5 4
QTD 63 • 16 NG 01 63 16 21 14 40 55,8 7 4,5 4
QTD 63 • 16 NG 02 63 16 21,5 14,5 40 57,3 7,5 4,5 4
QTD 70 • 12 NG 01 70 12 22,5 15,5 44 66,4 8,5 5,5 5
QTD 80 • 12 NG 01 80 12 21 14 55 72,6 7 4,5 4
QTD 80 • 16 NG 01 80 16 22,5 14 55 74 8,5 5,5 5
QTD 80 • 16 NG 02 80 16 21 14 55 72,6 7 4,5 4
QTD 100 • 20 NG 01 100 20 27,5 19,5 72 93,5 11,5 6,5 6
QTD 100 • 20 NG 02 100 20 26 18 72 92,4 10 5,5 5
QTD 125 • 20 NG 01 125 20 26 18 90 117,2 10 5,5 5
QTD 140 • 22 NG 01 140 22 29 20 108 131,2 11 6,5 6
QTD 160 • 27 NG 01 160 27 29 20 110 151,2 11 6,5 6
QTD 200 • 27 NG 01 200 27 35 25 150 190,8 15 10,5 10

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