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RPM Sensor
VERDER Sensor installation PCD’s
Pump Model Recommended PCD Offsets
VF10 Ø 110 (Front Cover) 14mm
VF15 Ø 195 (Rear Casing) 23mm
VF25 Ø 240 (Rear Casing) 27mm
VF32 Ø 300 (Rear Casing) 33mm
VF40 Ø 415 (Rear Casing) 41mm
VF50 Ø 537 (Rear Casing) 54mm
VF65 Ø 720 (Rear Casing) 48mm
VF80 Ø 850 (Rear Casing) 56mm
VF100 Ø 1000 (Rear Casing) 91mm
VF125 Ø 1230 (Rear Casing) 114mm
Note: Offset is related to the rib positions on the casing, but the front cover inspection window is
best utilized for the VF10 & VF15 where the cover should be tapped and locked from the outside
as there is no running clearance inside the pump! Siting of the hole must be at the top of the
pump in relation to its final installation position to avoid excess contact with the lubricant and its
contaminants during operation!
The rotor rim/central boss or shoe should be drilled and tapped to accommodate the interrupter,
which can typically be a small bolt for example. This should be used in the final sensor setting,
in respect of measuring the amount of protrusion required through the case/cover to sense the
bolt head during rotation, in line with the sensors pick up range.
On close-coupled pumps fitted with a vacuum unit, it may be necessary to fit a second or double
lip seal to the gear motor output shaft (to prevent the oil being sucked from the gear into the
pump housing) together with a retaining plate (to stop the lip seal being sucked out)
Future Developments
VERDER’s in-house team of engineers are continuously striving to develop the hose pump and
its application to new areas; naturally this covers the development of accessories and
complementary versions of the hose pump to achieve maximum efficiency and performance.
Feedback from operators and customers is always welcomed therefore, and any comments or
queries concerning your particular application should be forwarded to your local VERDER
distributor, who will then forward them to VERDER
