Cathodic Protection Test Stations
CP Test - VALVCO manufactures cathodic protection test stations to satisfy cathodic protection field-testing needs in the oil, gas, water, and electric industry. We have been manufacturing both standard test and custom test stations for nearly a century. Continuous improvement with technologies is essential to our success. As such, CP Test holds a number of patents that are currently the standard protocol in the respective markets we serve. We offer a wide variety of test stations and models designed to meet even the most rigid standards.
Exclusive C.P. Test Station Features
- Non-corrosive, strong, durable ABS plastic
- Lightweight, easy to handle and store
- Break-proof in normal use
- Heavy cast iron lid and collar to withstand abuse of heavy traffic
- Non-conductive-plastic construction eliminates electrolytic and galvanic action
- Flared design prevents dislocation and reduces strain on wires
- Terminal block prolongs life of wires by minimizing wire movement and reducing chance of wire breakage
- Terminal blocks are made of polyester laminate reinforced with fiberglass
- Machine screws and nuts are 1/4" 20 thread nickel plated
- Lock washers are nickel plated
Terminal Box #NM
Plastic pipe, 5" I.D., 18" shaft length.
Available with 4, 5 or 7 terminals.
Heavy cast iron lids, both locking and non-locking, available.
One-inch extensions available whenever road resurfacing occurs.
C.P. Mini Box
Plastic pipe, 2 1/2" I.D., 18" shaft length
The unique design of Mini Box allows for more simplified testing. Leads are attached to a terminal block in the cap and securely fastened down. The entire cap assembly is easily lifted and tilted for testing.
A 2-point terminal box is standard. The block is secured in place beneath the cover. 4 or 5-point blocks also available.
Heavy cast iron cover (locking)
2-point terminal box.
Glenn 4 Test Station
Plastic pipe, 3 1/2" I.D., also available in 4" I.D. 18" shaft length.
- Durable cast iron cover and collar, ideal for curb installations.
- Easy access for 5-wire terminals and constructed to accommodate pass-through studs if desired.
- Yellow covers furnished unless otherwise specified. "C.P. TEST" imprinted on all covers.
- Reasonable priced and versatile enough to suit most requirements.
Terminal blocks are made of polyester laminate reinforced with fiberglass. Machine screws and nuts are 1/4" x 20 thread nickel plated. Lockwashers are nickel plated. Lightning gap type arresters can be set for a gap distance from 4 to 40 mils. Brass shorting straps supplied are approximately 40 mils thick and can be used as a gauge for setting gap distances.
Heavy cast iron locking covers for protection on both Mini and Glenn 4. Patented Venti cover has a pentagonal bolt cast in the center, requiring only a quarter turn for locking.
Typical Terminals
Glossary of Terms for Underground Corrosion
- Anode: A piece of metal, carbon or other conductor which loses or discharges current to a surrounding electrolyte.
- Lead: Length of wire used to complete a circuit from anode to pipe.
- Test Lead: A wire attached to a pipe for testing its potential to soil or its current.
- IR Drop: Voltage drop or resistance due to a current flow.
- Insulated: Separated by some material which is a very poor conductor.
- Potential E: A term specifying the driving force of an electrical circuit, commonly expressed in Volts. Analogous to pump horsepower in pipeline work.
- Cathodic Protection: A method of reducing or preventing corrosion of metallic structures by so impressing potentials on them as to make them cathodic throughout with respect to surrounding electrolyte.
The unique design of Mini Box allows for more simplified testing. Leads are attached to a terminal block in the cap and securely fastened down. The entire cap assembly is easily lifted and tilted for testing.
A 2-point terminal box is standard. The block is secured in place beneath the cover. 4 or 5-point blocks also available.