10
SEMPELL
SERIES S, TYPES SO, SC, SB, SOH FULL-LIFT SAFETY VALVES
OPERATING INSTRUCTIONS
5.7 Disassembly and installation of disc
Use lifting gears
for big valves
6 ASSEMBLY
6.1 Mounting of the valve bonnet
Assemble valve bonnet again. Screw the bonnet
nuts (14) onto the bonnet studs (13) and tighten
them by tightening torques according to table.
Loosen spindle nut (22). Check recorded
measure from upper edge spindle (11) (or (7.2)
(at orifice T1-Z), SOH) to upper edge adjusting
screw (17).
In case of differences adjust adjusting screw
(17). In doing so, the set pressure remains
the same. Check adjusting screw (17) with
adjusting screw nut (18). Secure spindle nut
(22) with dowel (40). Put on cap parts (19) and
(20) and tightly connect them with the bonnet
(12) by means of cap bolts (21).
6.2 Assembling of the dismantled safety valve
At valves with screwed nozzle
Screw in nozzle (2) with new gasket (23) into the
body (1) and tighten up to the metallic stop.
At valves with adjusting ring
Turn adjusting ring (5) on the nozzle (2). Adjust
it to the height measured during disassembly
and secure it within the marked groove by
means of the adjusting ring pin (6) turned into
the body (1).
NOTE
If this information is no longer available, the following
adjustment is recommended at the assembled valve.
Turn adjusting ring (5) to the disc holder (7) up to
the stop. Shift adjusting ring (5) downwards by the
following numbers of notches:
SKB
D/E F G H
J
K L M N P Q R T T1 U V W X
Y
Z
Number of notches
6
8 10 12 15 18 23 26 28 23 30 35 34 72 81 60 70 84 98 114
5.6 Dismantling of the safety valve
Removal or disassembly of the possibly
mounted pneumatic drive A 160 see operating
instruction SEMSH-0067.
Remove lead seal. Take off cap (19, 20, 21).
Remove dowel (40) and spindle nut (22).
Measure distance from upper edge spindle (11)
(or (7.2) (at orifice T1-Z), SOH) to upper edge
adjusting screw (17) and register it. Loosen
adjusting screw nut (18) and release the spring
(15) by means of an adjusting screw (17).
Loosen bonnet nuts (14) and lift off bonnet
(12). For valves from size ‘T’ equipped with a
tightening nut (46) completely release spring
(15) by turning up tightening nut (46).
For orifice D - T
Remove retainer (31) or lower bearing plate (32)
which protects the pin (30) against being lost.
Press out pin (30) and remove spindle (11) with
spring (15) and accessory.
For orifice T1 - Z, SOH
Remove spring (15), spring plate (16) and
accessory from spindle (7.2).
By means of lifting gears draw spindle (7.2)
upwards against the stroke stop and with
complete internal parts carefully draw out
vertically upwards.
ATTENTION
Disc (3) must not fall out of disc holder (7.1) in any
case. Danger of damage! Possibly secure disc (3)
by means of adhesive tape against falling out.
If required, further dismantle spindle assembly.
For T1-Z and SOH, the spindle assembly can
not be further dismantled.
Dismount gaskets (24), guide (10) and, if
available, intermediate flange. Remove disc
holder (7.1) and disc (3).
ATTENTION
At valves with adjusting ring mark the locked
groove at adjusting ring (5). Measure and record
the distance between upper edge adjusting
ring (5) and valve seat (2.1).
Unscrew adjusting ring pin (6) and
adjusting ring (5).
Dismantle nozzle (2) only if required.
Dismount cap (19, 20, 21) with lifting lever only
if required.
