8
SEMPELL SERIES VSE/VSR FULL LIFT AND NORMAL SAFETY RELIEF VALVE
OPERATING INSTRUCTIONS
TABLE A: Greases for lubricating the removable valve components
Design temperature of the valve T
B
Grease
T
B
< 400°C Molykote
®
BR 2 Plus
[1]
400°C ≤ T
B
< 700°C Molykote
®
P 37
[1]
[1]
Before applying the grease, ensure that the surfaces are metallically blank (free of oil, grease, etc.) and free of
dirt particles.
The greases specified in Table A are manufactured and/or supplied by the following
manufacturers and/or suppliers:
Grease: Manufacturer / Supplier:
Molykote
®
BR 2 Plus Dow Corning GmbH Wiesbaden
Rheingaustr. 34, 65201 Wiesbaden
Molykote
®
P 37 Dow Corning GmbH Wiesbaden
Rheingaustr. 34, 65201 Wiesbaden
ATTENTION
For oxygen application all parts in contact with the medium must be free from oil and grease.
Dangerof explosion.
5.4.2 Lapping abrasives
It is necessary to use special lapping abrasives that contain finely distributed hardened particles
for lapping seat surfaces on body and disk seats. The lapping abrasive specified in Table B is
recommended by Sempell:
TABLE B: Lapping abrasives, suitable for the finishing of valve seats
Lapping abrasive: Manufacturer / Supplier:
TETRABOR
®
Boron carbide (F 100 - F 1200)
ESK Ceramics GmbH & Co. KG
Max - Schaidhauf-Str. 35, 87437 Kempten - Germany
Lapping abrasive for disc out of material 1.4980:
Diamond suspension 2 - 30 µm.
Mikrodiamant GmbH, Ostfildern
5.4.3 Further operating materials
Further required operating materials and their usage are specified in Table C and are
manufactured and/or supplied by the following manufacturers and/or suppliers:
TABLE C: Further operating materials
Usage Type Manufacturer / Supplier
Degreasing agent Isopropylalkohol (2-Propanol)
Assembly lubricant (colloidal graphite)
for parts in contact with the medium
DAG
®
156 Acheson Industries, Dornstadt
O-ring grease Molykote
®
55 Dow Corning GmbH Wiesbaden
Rheingaustr. 34, 65201 Wiesbaden
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