Servicing - Samson 45-1 Mounting And Operating Instructions

9 Servicing

The regulator does not require much mainte-
nance. Nevertheless, it is subject to natural
wear, particularly at the seat, plug and oper-
ating diaphragm. Depending on the operat-
ing conditions, check the regulator at regular
intervals to avoid possible malfunctions.
Plant operators are responsible for drawing
up an inspection and test plan. Details on
faults and how to remedy them can be found
in the 'Malfunctions' chapter.
The work described in this chapter is to be
performed only by personnel appropriately
qualified to carry out such tasks.
We recommend removing the regulator from
the pipeline before performing any mainte-
nance or service work.
DANGER
!
Risk of bursting due to incorrect opening of
pressurized equipment or components.
Regulators and pipelines are pressure
equipment that may burst when handled
incorrectly. Flying projectile fragments or the
release of process medium under pressure
can cause serious injury or even death.
Before working on the regulator:
Î Depressurize all plant sections concerned
and the regulator.
Î Disconnect the control line.
Î Drain the process medium from the plant
sections affected as well as from the
valve.
EB 3124 EN
WARNING
!
Risk of burn injuries due to hot or cold
components and pipeline.
Regulator components and the pipeline may
become very hot or cold. Risk of burn inju-
ries.
Î Allow components and pipelines to cool
down or warm up to the ambient tem-
perature.
Î Wear protective clothing and safety
gloves.
WARNING WARNING
! !
Risk of personal injury due to residual
process medium in the regulator and
control line.
While working on the regulator and control
line, residual process medium can escape
and, depending on its properties, may lead
to personal injury, e.g. (chemical) burns.
Î Wear protective clothing, safety gloves
and eye protection.
NOTICE
!
Risk of regulator damage due to over- or
under-torquing.
Observe the specified torques when tighten-
ing regulator components. Excessive tighten-
ing torques lead to parts wearing out more
quickly. Parts that are too loose may cause
leakage.
Î Observe the specified tightening torques
(see section 'Tightening torques' in the
Appendix).
Servicing
9-1