Sempell VSE Series User Manual

7
SEMPELL SERIES VSE/VSR FULL LIFT AND NORMAL SAFETY RELIEF VALVE
OPERATING INSTRUCTIONS
4 INSPECTION AND MAINTENANCE WORKS
Determine inspection intervals depending
on frequency of response and operating
conditions. Keep certificates about performed
works at the safety valve.
Before commissioning again drain safety valve.
While controlling
• Check valve for tightness. In doing so, take
care of the following indications: whistling
noises, medium at the bonnet, medium at the
drain nozzle or in the exhaust line.
Inspection
• Check each sealing. Replace if leaky.
• Check seat faces.
• Smooth valve seat and disc (4) with fine
lapping paste. If necessary, replace disc (4).
• Equalize guide areas of the spindle (7); when
doing so, do not apply material removing
machine works.
ATTENTION
Do not treat valve seats, metallic sealing surfaces
and sliding guides in contact with the medium.
ATTENTION
For oxygen application all parts in contact with
the medium must be free from oil and grease.
Dangerof explosion!
5 DISASSEMBLY
5.1 Danger and warning indications
Take work order and wait until the installation is
switched free.
Check if the valve is pressureless and
cooleddown.
Residual medium may escape when opening and
disassembling the valve; also at pressureless
plant further evaporations are possible.
Before disassembly switch off electrical supply,
loosen plug or disconnect cable.
5.2 Instructions for disassembly
• First dismount supplementary loading.
Disassemble position indicator only if
necessary.
• For works at lifting nuts (12) or tightening
screw (11) secure the spindle (7) e. g. with a
pin against torsion as otherwise the valve seat
can be damaged.
Loosen nuts (9.1) only when the spring (10) is
released as the studs (9) cannot absorb the initial
stress in the spring (10).
5.3 Tools
• fixed spanner 10 - 80 mm
• socket wrench 17 mm
• screwdriver 8 mm
• retaining ring pliers for outer rings
• flatnose pliers
• side cutting pliers
• hammer
• punch Ø 2,5; 3; 4 mm
• seal wire
• lead seal
• lead-sealing pliers
• vernier calliper
• lapping wheel
• washer for M10, M16, M24
In case of very great safety valves (SKB X, Y
and Z) it is possible that there are other parts
or parts arrangements than described in this
operating instruction because of special design
conditions. Please observe special, order
specific assembly drawing.
5.4 Operating materials
5.4.1 Lubricating the removable valve components
To lubricate the removable or detachable
valve components during assembly, use the
greases specified in Table A. Removable or
detachable valve components are all screw
connections, especially pressure-retaining
screw connections, and other components
within the distribution of forces. All removable
or detachable valve components are lubricated
with the same grease if they are lubricated in
the assembly process.
The operating temperature of the valve is
definitive for selecting the grease to be applied
for the removable valve components (cf. Table A).
At larger intervals, e.g. each 3 years
• Completely disassemble safety valve.
• Clean and check valve parts.
• Smooth valve seat and disc (4) with fine
lapping paste. If necessary, replace disc(4).
Incase of rework observe functionally
important outlines at the valve seat.
• Replace spring (10) when damaged by
corrosion or temperature and readjust set
pressure.
• Equalize guide areas of the spindle (7); when
doing so, do not apply material removing
machine works.
• Lubricate roller bearing (48) and tightening
screw (11).
• Treat ball (18), sliding guides not in contact
with the medium, fits, gaskets and threads
with an assembling lubricant.

Sempell VSE Series Specifications

General

Brand	Sempell
Model	VSE Series
Category	Control Unit
Language	English