Flow Switches Made in the U.S.A. · Serving Industry Worldwide
PEECO Series Selections
E Series
Flow Switch
Explosion Proof · Class I, Group D
Rugged, explosion-proof, flow-actuated electrical switches engineered for hazardous location service. Up to 600 PSI, liquid or gas service. Exceeds all applicable UL Code requirements.
True Explosion-Proof Design
1/4″ thick heat-treated aluminum cover with five fully engaged threads. Designed to safely contain any internal explosion. Class I, Group D certified.
Flow-Actuated — Not Pressure
Detects fluid velocity, not static pressure. No minimum or maximum flow limits to calculate. Less than 10% dead band between make and break.
Inherently Leak-Proof
Seamless 321 stainless steel bellows assembly, silver-brazed or welded per specification. No packing glands or stuffing boxes required.
Technical Data
Standard Specifications
Industries Served
Typical Applications
- Chemical and petrochemical processing
- Refineries and hazardous gas systems
- Power generation facilities
- Pharmaceutical manufacturing
- Industrial automation and fluid management
- Safety interlocks and alarm systems
Available Models
Four Basic Styles
Wafer Mount Model ET-F
Connection: Wafer Tee. Standard Size: 2″ 150# or 300# R.F. Optional: Any size, style and rating. Line Size: 2″ and under (standard) over 2″ (optional).
Threaded Tee Mount Model ET
Connection: Screwed Tee. Standard Size: Specify Size. Optional: Socket-Weld, Butt-Weld. Line Size: 2″ and under (standard) over 2″ (optional).
Screwed MNPT Mount Model EP-S
Connection: Screwed Top Mount. Standard Size: 2″ npt. Optional Size: Any other size. Line Sizes: 2½″ and up.
Flanged Mount Model EP-F
Connection: Flanged. Standard Size: 2″ 150# or 300# R.F. Optional Size: Any size, style and rating. Line Size: 2½″ and up.
Why PEECO
E Series vs. Standard Flow Switches
| Feature | Standard Flow Switch | PEECO E Series |
|---|---|---|
| Hazardous Location Rating | ❌ Not rated | ✔ Class I, Group D explosion-proof |
| Actuation Method | Often pressure-based | True flow-actuated |
| Maximum Pressure | Typically ≤ 300 PSI | Up to 600 PSI |
| Custom Engineering | Fixed, off-the-shelf | Built per application |
| Leak Prevention | Packing glands or seals | Welded/brazed bellows — leak-proof |
| Dead Band / Differential | High or undefined | <10% make/break differential |
| Environmental Protection | Basic enclosure | Heavy-duty explosion-proof housing |
| Adjustability | Limited | Fully field adjustable |
| Engineering Support | Minimal or none | Included at no cost |
Specify Your E Series Switch
Every unit is application-specific. Contact our team for engineering consultation and pricing.
Ready to Specify Your E Series Switch?
Every unit is application-specific. Contact our team for engineering consultation and pricing.