Series NKS-N, NKSP-N
Page
9
9520-021-en
Revision 17
TM 10477
Edition 05/2022
♦
For safe and reliable operation, it must be
ensured with regular inspection intervals that the
unit is properly serviced and kept in a perfect
technical condition.
♦
Increased wear to the valve can be expected with
the conveyance of liquids containing abrasive
constituents. The inspection intervals are to be
reduced compared with the usual times.
♦
Actuators and electric peripherals, such as
temperature, pressure and flow sensors etc., must
comply with the valid safety requirements and
explosion protection provisions.
♦
The valve must be grounded.
This can be achieved in the simplest way via the
pipe screws using tooth lock washers.
Otherwise grounding must be ensured by different
measures e.g. a cable link.
♦
Attachments such as actuators, position control-
lers, limit switches etc. must satisfy the relevant
safety regulations as regards explosion protection
and, if required, be designed in compliance with
ATEX.
♦
Special attention must be paid to the appropriate
safety and explosion protection notes in the
respective operating manuals.
♦
Plastic-lined valves must not be operated with
carbon disulphide.
4
Safety note for valves, certified to Clean Air Act (TA Luft)
Certificate / Manufacturer Declaration Validity is
dependent on the operating instructions being read
and observed.
♦
Carry out regular maintenance intervals and
check the tightness of the screw connections and
tighten as necessary.
5
Transport, storage and disposal
It is imperative, for all transport work, to
observe generally accepted engineering
practice and the accident prevention
regulations.
The valve is supplied with flange caps. Do
not remove them until just before installa-
tion. They protect the plastic surfaces
against dirt and mechanical damage.
Handle the goods being transported with care. During
transport the valve must be protected against
impacts and collisions.
Directly after receipt of the goods, the consignment
must be checked for completeness and any in-transit
damage.
Do not damage paint protection.
5.1 Storage
If the valve is not installed immediately after delivery,
it must be put into proper storage.
It should be stored in a dry, vibration-free and well-
ventilated room at as constant a temperature as
possible.
Elastomers are to be protected against UV light.
In general, a storage period of 10 years should not
be exceeded.
5.2 Transport preparations
During transport the disc/stem unit must not project
beyond the body dimensions.
Actuated with lever
When the valve is in the closed position, the lever is
to lock in the first lever catch. This results in the
disc/stem unit being slightly opened.
Actuated by means of worm gear
When the valve is in the closed position, the
disc/stem unit is to be 10-15° open.
Actuator
When the valve is in the closed position, the
disc/stem unit is to be 10-15° open.
Attach a locking plate on shut-off and control butterfly
valves with a single-acting actuator See
Section
5.2.1
.and drawing in
Section 4.4
For sign regarding support (attached to the valve on
delivery), see
Section 1.1
.
Apply protection to the sealing surfaces.
5.3 Return consignments
Valves which have conveyed aggressive
or toxic media must be well rinsed and
cleaned before being returned to the
manufacturer's works.
It is imperative to enclose a
safety information
sheet
/
general safety certificate
on the field of
application with the return consignment.
Pre-printed forms are enclosed with the installation
and operating manual.
Safety precautions and decontamination methods are
to be mentioned.
