Fisher spring-diaphragm actuators, particularly the 657 and 667 sizes, are the default pneumatic operator on thousands of globe valve bodies. Rotary actuators such as the 1051, 1052 and 2052 serve the Vee-Ball and butterfly families. On top of them sit positioners, from older pneumatic and electro-pneumatic models to the FIELDVUE digital valve controllers that have replaced most analogue instruments in the last two decades.
A digital positioner with a legible model number and no water damage is a strong item on its own. A FIELDVUE controller that has been sitting outdoors with the cover off is not. Storage conditions decide the value of instrument-level equipment more than service hours do.
Brand disclosure. Fisher is a trademark of its respective owner. Louisiana Valve Buyer is an independent purchaser of surplus equipment and is not affiliated with, authorised by, sponsored by or endorsed by Fisher or its owner. We do not provide manufacturer service, repair authorisation, calibration, pressure certification or product compatibility statements.
Inspection points
What decides the price
Model and firmware
DVC6000 and DVC6200 series controllers are the most requested. Note the full model string, not just the family.
Enclosure condition
Covers, gaskets and terminal boxes. Water ingress is the single most common reason a positioner is rejected.
Actuator size
Diaphragm size, spring range and travel. A complete actuator with its handwheel and travel indicator is worth more than a bare housing.
What to send
Making the review quick
A wide photograph of the whole unit, a close photograph of the valve nameplate, and the model number if you have it. If there are several identical units, one set of photographs and a quantity is enough.
If the equipment is already separated, keep the parts together and label them as a set. A matched pair is worth more than two orphans.
Questions sellers ask
Do you buy positioners separately from valves?
Yes. Instrument-level equipment is bought on its own when the quantity and condition justify it.
Are obsolete positioner models of interest?
Sometimes, for spares. Send the model numbers and we will tell you which ones have a market.