P7.CDi3 Submersible, Universal Gas-Field Controller
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- All Keller-digital pressure measurement, universal gas-field controller, 11"x11"x11" cube.
- Fully-on, fully-off type of controller. Wakes up, reads everything, stores everything, operates the switch if it has to, and goes back to sleep 1.7seconds later.
- Programmable interval from 1 minute to 12 hours, with one minute resolution. Due to this operating mode, it can operate without recharge for years.
- Designed to be perfectly comfortable at the bottom of Lake Erie, can be used as a line controller, plunger lift, intermitter, etc.
- Supports RS485, master-slave, wired or wireless, multidrop networks at up to 115.2Kbits/sec.
- Local RS485 network to "talk" to its Keller pressure transmitters at up to 115.2Kbits/sec.
- State-of-the-art PA10LHX singles and PD10LHX differential Kellers, all Hastelloy C276 construction, sourced from Keller in Switzerland.
- Field-replaceable differential and switching cylinders, pressure transmitters.
Reading (Differential) Cylinder
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- 316L cylinder contains a PD10 series Keller differential transmitter and its Hastelloy housing, a forward check valve to protect it from forward spikes, and a 10,000psi penetrator originally sourced from Impulse in California (now a Teledyne Company).
- Cylinder mechanical drawings and Hastelloy PD10 housing half.
Switching Cylinder
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- 316L cylinder contains a latching type of solenoid, sourced from Burkert in Germany and a 10,000psi penetrator originally sourced from Impulse in California (now a Teledyne Company).
- The solenoid can switch at pressures of up to 140psi, so it is meant to be supplied through a pressure regulator. The lake operation has had a 20-year period of successfully using these 6V, low-power, media-isolated, latching type of valves.
- Waterproof, quick connectors allow very fast change-out of the entire cylinder in the field.
- The solenoid is used as a pilot valve to operate a pneumatic actuator which in turn does the actual well switching.
Keller Digital Singles
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- Keller PA10 series, 0.05%FS-class-over-temperature pressure transducer, coupled with a Xemics XE8805A-based (now Semtech) board.
- Hastelloy C276 business end, all other metal 316L, 4-wire connection, 2 committed to power, the other 2 for either digital communication or analog output.
- See this page for more info on the Kellers.
PVC Frame
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- Supporting frame made of PVC stock with 316 SS hardware.
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