Ground-Position Indicators | SLB

Ground-Position Indicators

Clear indication of valve status

DYNATORQUE accessories during manufacturing.

When a valve and gear are installed in a buried service application, it may be difficult (or impossible) to know if the valve is open or closed.

The DYNATORQUE accessories portfolio includes ground-position indicators, which visually indicate the position of a hidden valve.

  • Capable of exceeding 30,000 turns
  • Ground-level window indicates valve open or closed in bold red lettering
  • Optional limit switches indicate valve position to operator in a remote location
  • Sealed GPI-S version available
  • Optional 2-in (AWWA) square operating nuts, extension stems, and couplings

This product is not applicable for rising stem valves or for valves with extension stem requirements in excess of 1.250-in diameter. Does not include valve box or valve box cover. Materials indicator base plates are cast aluminum; traveling nut shafts, input shafts, and indicator arrows are brass. Input drive gears and traveling nuts are Delrin. Change gears are brass (bevel gears for 58 turns and below) or brass and steel (worm gear sets-all turns 59 and above). Window is Lexan. Main shaft bushings are sintered bronze, and all other bushings are nylon. Sealed indicators include aluminum housing enclosure, carbon steel shafts and snap rings, Buna-N seals.


  • 2-in AWWA nuts
  • Extension stems (1.250-in-diameter stock, 72-in increments, with 2-in-square socket)
  • Couplings (extension stem to GPI-S shaft)
Ground-Position Indicator
DYNATORQUE valve accessories
Nonsealed GPI Series
Sealed GPI-S Series
Model  Weight, lbm Turn Range Model Weight, lbm Turn Range
GPI 19  11 1–19  GPI-S19  24  1–19
GPI 38  11 20–38  GPI-S38  24  20–38
GPI 58  11 39–58  GPI-S58 24  39–58
GPI 98  11  59–98  GPI-S98 24  59–98
GPI 148  11 99–148  GPI-S148 24  99–148
GPI 198  11 149–198  GPI-S198 24  149–198 
GPI 298 11 199–298  GPI-S298 24  199–298 
GPI 398  11 299–398  GPI-S398 24 299–398
GPI 498  11 399–498  GPI-S498 24  399–498 
GPI 598  11 499–598  GPI-S598 24  499–598
GPI 938  11 599–938  GPI-S938 24  599–938

Position Indicators up to 30,000 turns available in both GPI and GPI-S series.