Flowserve Torex butterfly valves User Manual

Page 7

Adjust the end position stop until the actuator

has turned the valve disc to the sealing position.

This sealing position varies from valve to valve,

and the dimension is speciﬁed on the valve body

adjacent to the arrow showing the direction of

ﬂow. See dimension ”A” in Fig. 4 in section 9.4.

General

The actuator may be ﬁtted either in line with the

connected pipes or transversely to them. An

intermediate plate is necessary for mounting the

actuator in line with the pipework.

N.B. The direction of closure must always be clock

wise, as viewed from the actuator.

Before ﬁtting the actuator, it is important to ensure

that the actuator ﬁts the shaft. First try without keys, to

check that the drive slips easily onto the shaft. Also check

that the keys are easy to ﬁt and match the keyways in the

shaft. Grease the actuator shaft entry.

Take care to ensure that the end position stops on the

actuator are correctly set and locked. If the end position

stop for the closed position is incorrectly set, the valve

disc may overtravel, which could damage the sealing

elements.