beautypg.com

Watson-Marlow PD/40 User Manual

Page 12

background image

12

Avoid too heavy loads on the flanges. The maximum forces are given in the table below:

Maximum flange loads

Force

Unit

PD/40

PD/65

PD/100

F1

N

1000

1400

2000

lbf

225

315

450

F2

N

500

700

1000

lbf

112

157

225

F3

N

200

300

400

lbf

45

67

90

5.4

Lifting and moving the pulsation damper

To lift, move and position the pulsation damper, suitable hoisting belts must be used. The best place
to attach the hoisting belts is immediately behind both flanges of the pulsation damper. Keep in mind
the pulsation damper’s weight. For weights see also paragraph 8.3 Weights.

WARNING

If the pulsation damper is to be lifted, ensure that all safety regulations
for lifting movements are adhered to and that the lifting is carried out by
qualified personnel only.

5.5

Setting the pulsation damper pressure level for operation

The pulsation damper air or nitrogen pressure level must be set. This setting for maximum pulse
reduction depends on the process condition. Therefore the setting can only be obtained when the
pump is running at operating conditions.
It is advised to check the pressure relief valve functioning with each installation, hose replacement or
annually (which comes first). (See paragraph 6.4 Checking the Pressure relief valve.)

CAUTION

Consider the maximum allowable pressure. The maximum allowable
pressure can either be determined by the pulsation damper, pump or
process. Exceeding the maximum allowable pressure may lead to
serious injuries or damage to the pump and the environment.

This manual is related to the following products: