INVIZIONS PRODUCT
Extend-O-Valve — The Safe Way to Sample Transformer Oil
A fire-rated, non-conductive transformer valve extension system that relocates your oil sampling point outside the substation fence — eliminating the need to enter energized substations for routine oil sampling operations.
Transformer Valve Extensions — Your Solution for NFPA 70E Compliance
The Extend-O-Valve system was developed to solve a persistent safety challenge in substation operations: how to perform routine transformer oil sampling without requiring personnel to enter the energized substation. By routing the oil sampling connection from the transformer to an external weatherproof valve box mounted outside the substation fence, the Extend-O-Valve eliminates arc flash and electrical hazard exposure for maintenance personnel performing routine sampling operations.
The Extend-O-Valve system complies with NFPA 70E electrical safety requirements. It is fire-rated to 2000°F for 20 minutes, non-conductive to SAE 100R7 specifications, and pressure-rated to 11,000 PSI — exceeding the requirements of transformer operating environments. Both Kit #2 and Kit #3 include complete installation hardware and step-by-step instructions.
Extend-O-Valve Installation Image
Extend-O-Valve Key Features
Fire Rated
Rated to 2000°F for 20 minutes. Suitable for installation in proximity to transformer oil and energized electrical equipment.
Non-Conductive
SAE 100R7 non-conductive flexible tubing specifications. Will not conduct electrical current from the transformer to the sampling point.
11,000 PSI Pressure Rated
Exceeds the pressure requirements of transformer oil systems. Rated for both vacuum and pressure testing operations.
Secure External Box
Weather-resistant, lockable valve box with stainless steel hardware. Prevents unauthorized access and protects sampling valve from environmental exposure.
Primary & Secondary Applications
Suitable for both primary (high-voltage) and secondary (distribution) voltage transformer applications.
Flexible Placement
Front or side exterior box location. Can be positioned to avoid physical hazards and provide convenient access for maintenance personnel.
Available Kits
Extend-O-Valve Kit #2
- 48" flexible non-conductive, fire-rated tubing & attachment couplings
- 1/4" valve, fittings, gaskets & washers
- External weather-resistant, lockable valve box with stainless steel hardware
- Hole saw & mounting equipment
- Step-by-step installation instructions for Valve Extension & Pressure/Vacuum Gauge
Pricing does not include shipping. Contact us for shipping quote.
Extend-O-Valve Kit #3
- 48" flexible non-conductive, fire-rated tubing & attachment couplings
- 1/4" valve, fittings, gaskets & washers
- External weather-resistant, lockable valve box with stainless steel hardware
- Hole saw & mounting equipment
- Step-by-step installation instructions for Valve Extension, Pressure Gauge, Vacuum Gauge & Oil Sampling Valve
- Additional components beyond Kit #2 — contact for complete specification
Contact us for volume pricing on multiple units.
Technical Specifications
| Specification | Value |
|---|---|
| Tubing Length | 48 inches |
| Pressure Rating | 11,000 PSI |
| Fire Rating | 2000°F / 20 minutes |
| Electrical Rating | Non-conductive (SAE 100R7) |
| Valve Size | 1/4 inch |
| Box Material | Weather-resistant / lockable |
| Hardware | Stainless steel |
| Voltage Applications | Primary & Secondary |
How the Extend-O-Valve Works
Installation
The Extend-O-Valve tubing connects to the transformer's existing oil sampling valve inside the substation. The flexible, fire-rated tubing routes through the transformer enclosure or along a conduit path to the exterior mounting location.
Valve Box Mounting
The external weatherproof valve box is mounted to the substation fence or exterior structure. The lockable box protects the sampling valve and pressure/vacuum connections from weather and unauthorized access.
Safe Oil Sampling
Maintenance personnel can now connect oil sampling equipment to the Extend-O-Valve box from outside the substation fence — no entry required, no arc flash exposure, full NFPA 70E compliance.
Professional Installation Available
Invizions provides professional Extend-O-Valve installation services through our substation maintenance team. We can install the system during a scheduled substation maintenance visit, combined with transformer oil sampling, infrared thermography inspection, or other maintenance activities. Contact us for a combined service and installation quote.
Contact Us About InstallationOrder Your Extend-O-Valve Today
Available as Kit #2 ($969) or Kit #3 ($1,919). Professional installation available. Contact us to place your order or ask questions about which kit is right for your transformer configuration.