P134 Gas Pressure Regulator (Internal Registration)
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The BelGAS P134 gas pressure regulator is a manual, direct-acting, spring-loaded adjustable regulator used in applications where accurate pressure reduction is required. It's a variation of the proven BelGAS P133 platform, upgraded with internal pressure registration — an integrated pitot tube connects the outlet port directly to the diaphragm chamber, so no external control/sense line is needed. This simplifies installation, reduces the number of fittings that can leak or freeze, and makes the P134 a favorite for techs who want a cleaner, more reliable hookup in the field.
The P134 uses a balanced supply valve to minimize the effect of upstream (supply) pressure swings on downstream pressure, and helps prevent the "shock" of abrupt downstream load changes that can trip safety shut-offs. With a broad selection of spring ranges and NPT or flanged connections, it's equally suited to commercial and industrial furnaces, burners, boilers, gas engines, and compressor applications.
The P134 is one of our most popular regulators — it's a direct functional replacement for the Honeywell/American Meter 3000 Series and for Fisher 133 / 133HP / 166 regulators, with the added benefit of internal registration that those legacy models don't offer.
Features:
- Internal pressure registration — no external sense line required
- Balanced supply valve minimizes effects of supply pressure changes
- Wide pressure range offering (10 spring ranges available)
- Suitable for monitoring service
- Available in Iron or Steel body; Nitrile or Fluorocarbon trim
- NPT or Flanged (125 FF / 150 RF) connections
- Rebuild kits available
Applications:
- Industrial and commercial gas regulation
- Natural gas and propane regulation
- Furnaces, boilers, and burners
- Gas engines
- Compressors
Product Documentation:
- P134 Spec Sheet
- P134 Installation & Operation Manual (IOM)
Specifications
| Spec | Detail |
|---|---|
| Model / Series | P134 |
| Type | Direct-acting, spring-loaded, non-relieving (internal registration) |
| Port Size | 2" NPT |
| Connection | NPT or Flanged (125 FF / 150 RF) |
| Max Inlet Pressure | 125 PSIG (varies by version) |
| Max Outlet Pressure | 15 PSIG (varies by version) |
| Spring Ranges | 2–4" W.C. up to 5–10 PSIG (10 ranges available) |
| Body Material | Iron or Steel |
| Bonnet | Aluminum |
| Diaphragm / Trim | Nitrile or Fluorocarbon |
| Orifice Material | Aluminum |
| Temperature Range | -40°F to 200°F |
| Bonnet Orientation | 12, 3, 6 (standard), or 9 o'clock |
| Application | Commercial, Industrial |
| Pilot Operated | No |
(Note: flow/Cv data mirrors the P133 platform —)
Cross-Reference Part Numbers (for search + compatibility)
Replaces / Comparable to:
| Brand | Model / Series |
|---|---|
| Honeywell / American Meter | 3000 Series |
| Fisher | 133 |
| Fisher | 133HP |
| Fisher | 166 (obsolete) |
| Itron | RB1700 |
| Itron | RB4000 |
| Sensus | 121-12 |
| Sensus | 121-8HP |
| BelGAS (sister model) | P133 (external registration version) |