Flow Switches Made in the U.S.A. · Serving Industry Worldwide
PEECO Series Selections
H Series
Flow Switch
High Pressure Explosion Proof
PEECO's solution for extreme-pressure hazardous applications where conventional flow switches cannot survive. Successfully field tested to 10,000 PSI.
Solid Rod & Flexure Tube
Unlike bellows-based designs, the H Series uses a solid rod extending through a stainless steel flexure tube. Wall thickness engineered based on pressure requirements.
Up to 10,000 PSI
Recommended for all applications exceeding 600 PSI. Successfully field tested to 10,000 PSI. Inherently leak-proof without packing glands or stuffing boxes.
Technical Data
Standard Specifications
Industries Served
Typical Applications
- High-pressure chemical injection systems
- Refinery and petrochemical processes
- Hydraulic systems
- Power generation
- Government and defense installations
- Extreme-pressure safety interlocks
Available Models
Four Basic Styles
Model HT-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).
Model HT
Connection: Screwed Tee. Standard Size: Specify Size. Optional: Socket-Weld, Butt-Weld. Line Size: 2″ and under (standard) over 2″ (optional).
Model HP-S
Connection: Screwed Top Mount. Standard Size: 2″ npt. Optional Size: Any other size. Line Sizes: 2½″ and up.
Model HP-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
H Series vs. Standard Flow Switches
| Feature | Standard Flow Switch | PEECO H Series |
|---|---|---|
| Maximum Pressure | Typically ≤ 300 PSI | Up to 10,000 PSI |
| Hazardous Location Rating | ❌ Not rated | ✔ Explosion-proof |
| Actuation Method | Often pressure-based | True flow-actuated |
| Mechanical Design | Light-duty internals | Solid rod & flexure tube design |
| Leak Prevention | Packing glands or seals | Welded/brazed — inherently leak-proof |
| Adjustability | Limited | Fully field adjustable |
| Engineering Support | Minimal | Included at no cost |
H Series vs. E Series
| Feature | PEECO E Series | PEECO H Series |
|---|---|---|
| Maximum Pressure | Up to 600 PSI | Up to 10,000 PSI |
| Primary Sealing Method | Bellows assembly | Solid rod with flexure tube |
| Recommended Pressure Range | Low to medium pressure | All pressures above 600 PSI |
| Hazardous Location Rating | Class I, Division 1, Group D | Explosion-proof design |
| Typical Applications | General hazardous service | Extreme-pressure hazardous service |
When Pressure Reaches the Extreme
The PEECO H Series stands alone. Contact our engineering team for application review and pricing.
Ready to Specify Your H Series Switch?
The PEECO H Series stands alone. Contact our engineering team for application review and pricing.