Wipers may be used to prevent the cristallisation of media onto the glass and to remove dust and dirt.
SERIES W / WD / WDT / WR / WDR centrally operated wipers are mounted through the sightglass disc on either DIN 28120 (DN 50 - 200), DIN 11851 (DN 40 - 125) or similar sightglasses. The materials of construction are stainless steel with either a silicon rubber or PTFE wiper blade. The glass discs are available in sodium silicate to DIN 8902 and in borosilicate to DIN 7080. The maximum allowed temperatures are 180°C with wiper blade from silicone and 200°C with wiper blade from PTFE. Due to the central hole in the glass disc, they are not suitable for higher pressure applications, but are capable of operating under vacuum.
Series W = Version with one wiper-blade, manipulation by handling arm and ratch
Series WD = Version with double wiper-blade, manipulation by handling arm and ratch
Series WDT = Version with double wiper-blade, manipulation by T handle
Series WR = Version with one wiper-blade, manipulation by knob
Series WDR =Version with double wiper-blade, manipulation by knob
SERIES WS sideways operated wipers are mounted through the sightglass flanges of DIN 28120 type sightglasses in the range of DN 100 to DN 200. The maximum allowed pressure is 16 bar. Materials of construction are stainless steel with the wiper blades of PTFE or silicone rubber.
- Special O-ring seals
- Version in Hastelloy C4
- Larger dimensions (up to DN 400)
Wipers and spraying devices may be used in combination with each other and (dependent on sightglass size) with light fittings from the series KL (PowerLED) / FHL (PowerLED) / PL, (F)KEL (PowerLED) / (F)LKEL / (F)HEL (PowerLED) / PEL, L 20 deH, F 20 dH, R 50 deH, (R) 100 deH), EdelLUX , fibroLUX, miniLUX or metaLUX. Observation is aided considerably with the addition of a light fitting.