Nexen STC600 927270 Manuel d'utilisateur télécharger pdf (Page 6)

FORM NO. L-20294-E-1209

AIR CONNECTIONS

NOTE

For quick response, Nexen recommends a quick

exhaust valve and short air lines between the

Control Valves and the product. Align the air inlet

ports to a down position to allow condensation to

drain out of the air chambers of the product.

CAUTI ON

Low air pressure will cause slippage and

overheating. Excessive air pressure will

cause abrupt starts and stops, reducing

product life.

All Nexen pneumatically actuated devices require clean

and dry air, which meet or exceeds ISO 8573.1:2001

Class 4.4.3 quality.

The following is a common air supply scheme used with

this product. This is an example and not an all-inclusive

list. All air circuits to be used with this product must be

designed following EN983 guidelines.

AIR LINE CONNECTIONS

Nexen STCs have six air ports. All six air ports accept

1/8'' NPT ﬁttings. Air line connections to the STC can be

made in two ways.

The ﬁrst method requires three air sources and allows the

operator to interrupt or supply air to any combination of the

three pairs of ports. The three pairs of ports supply pressure

to three different sized pistons. Each port is labeled "A,"

"B," or "C." The two "A" ports supply the smallest pistons.

The two "B" ports supply the intermediate sized pistons.

The two "C" ports supply the largest pistons. The torque

output is related to a change in air pressure and the number

and size of the pistons used.

FIGURE 2

THREE SOURCE PLUMBING

FIGURE 3

ONE SOURCE PLUMBING

NOTE

Only pairs of pistons A, B, or C should be used. Do

not use only one piston.

The second method is to plumb all six ports together so

they are supplied by one source. This method relates the

change in torque performance to change in air pressure.

1 2 3 4 5 6 7 8 9 10 11 ... 16 17

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Nexen STC600 927270 Manuel d'utilisateur Page 6

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