Rego LPG 1st Stage Regulator-LV4403B4
RegO LV4403B4 is a low-pressure LPG second stage regulator designed to reduce first-stage pressure to burner pressure. It is suitable for medium commercial installations, multiple-cylinder LPG systems and normal domestic gas loads. The regulator features 1/2″ F.NPT inlet and outlet connections and a propane vapor capacity of up to 935,000 BTU/hr (20 kg/hr) under specified test conditions.
Key Features
-
- Genuine RegO LV4403B4 model
- Low-pressure LPG second-stage regulator
- Designed to reduce first-stage pressure to burner pressure
- Suitable for medium commercial applications
- Suitable for multiple-cylinder LPG installations
- Suitable for normal domestic gas loads
- 1/2″ F.NPT inlet connection
- 1/2″ F.NPT outlet connection
- Integral relief valve
- Replaceable valve orifice and valve seat disc
- Large molded diaphragm
- Straight-line valve closure design
- Built-in pressure tap
- Bonnet vent positioned over inlet
- RegO LV4403B Series design
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Description
The RegO LV4403B4 LPG Regulator is part of RegO’s LV4403B Series of low-pressure second-stage regulators.
It is designed to receive LPG vapor at first-stage pressure and reduce it to a lower pressure suitable for downstream gas appliances and burner systems. RegO specifies the LV4403B4 for medium commercial installations, multiple-cylinder installations and normal domestic loads.
Its compact regulator body, integral relief valve arrangement, replaceable valve orifice and valve seat disc make it suitable for LPG gas distribution and piping applications where controlled downstream pressure is required.
For technical projects, the actual regulator selection should be based on the required inlet pressure, outlet pressure, gas demand, piping design and applicable installation standards.
Specifications
| Specification | Details |
|---|---|
| Brand | RegO |
| Model | LV4403B4 |
| Product Type | Low Pressure Second Stage LPG Regulator |
| Application | LPG Vapor |
| Inlet Connection | 1/2″ F.NPT |
| Outlet Connection | 1/2″ F.NPT |
| Factory Delivery Pressure | 11″ w.c. at 10 PSIG inlet |
| Adjustment Range | 9–13″ w.c. |
| Adjustment Range | 22.4–32.3 mbar |
| Propane Vapor Capacity | 935,000 BTU/hr |
| Propane Capacity | 20 kg/hr |
| Orifice Size | #28 Drill / 3.57 mm |
| Bonnet Vent Position | Over Inlet |
| Body Design | Straight Through |
| Brand Origin | RegO |
The capacity figure is based on RegO’s specified test conditions: 10 PSIG (0.69 bar) inlet and 9″ w.c. (22.4 mbar) delivery pressure.
Applications
Residential LPG Systems
Suitable for normal domestic LPG loads where the specified pressure and capacity requirements match the application.
Commercial LPG Systems
Suitable for medium commercial LPG installations requiring controlled low-pressure gas supply.
Multiple Cylinder LPG Systems
The regulator can be used in LPG systems supplied by multiple cylinders, subject to proper system design and regulator sizing.
LPG Reticulation Systems
It can be considered as a downstream pressure-regulation component in appropriately designed LPG reticulation systems.
Gas Pipeline Systems
Suitable for LPG vapor distribution systems where the required inlet/outlet pressure and flow conditions are within the regulator’s specified operating range.
Why Choose RegO LV4403B4?
Reliable Pressure Regulation
Designed to reduce higher first-stage LPG pressure to a lower burner pressure suitable for downstream gas appliances.
High LPG Vapor Capacity
The specified propane vapor capacity reaches 935,000 BTU/hr / 20 kg/hr under RegO’s stated conditions. RegO Products
Integral Relief Protection
The LV4403B series incorporates integral relief valves as part of its design. RegO Asia
Replaceable Components
The valve orifice and valve seat disc are replaceable, supporting maintenance and servicing requirements. RegO Asia
Suitable for Engineering Applications
Its application range makes it relevant for residential, commercial and multiple-cylinder LPG systems when correctly selected and installed.
How It Works
LPG Cylinder / Manifold
↓
First Stage Pressure Regulation
↓
RegO LV4403B4 Second Stage Regulator
↓
Low Pressure LPG Pipeline
↓
Gas Appliance / Burner
Important Installation Note
The regulator must be selected and installed according to the actual LPG system design, required flow rate, inlet pressure, outlet pressure and applicable safety requirements.
Do not select a regulator based only on pipe size. Gas demand, operating pressure, regulator capacity and system configuration should be considered by a qualified engineer/installer.
RegO’s documentation also specifies the operating conditions associated with its published capacity figures.

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