The reducer is designed for Autogas vapor phase sequential injection systems. The reducer vaporizes the liquid petroleum gas supplied to the cylinders. The STAG R01 reducer ensures continuous stable pressure while supplying the precise fuel dosage to the gas injectors.

The reducer can be easily fitted in all cars with engines of up to 150 HP (black) or up to 250 HP (red), particularly turbocharged.

The high efficiency and thermal stability of the STAG R01 reducer ensure:

  • stable pressure and precise fuel dosage under sudden acceleration and engine load increase,
  • correct gas temperature regardless of driving conditions,
  • correct vaporization of gas, even in uncommonly low ambient temperatures.


LPG systems equipped with the STAG R01 reducer work perfectly with the vehicle power transmission system, ensuring trouble-free operation for years.
The reducer works perfectly regardless of LPG parameters, driving style or vehicle load.
The modified version of the STAG R01 includes enhanced internal components for the adjustment of exit pressure, which has improved the operational stability of the unit.

The stable working pressure of the STAG R01 enables:

  • very smooth and dynamic driving with optimized fuel consumption,
  • steady engine operation,
  • safe and comfortable driving.


The reducer quickly responds to sudden load changes. It provides the correct fuel dosing even at temporary high demand and prevents an excessive pressure rise and engine stuttering at the same time.

Benefits of STAG R01 reducers:

  • stable pressure,
  • works excellently with turbocharged engines,
  • tested in all conditions,
  • gas inlet elbow connection Ø12,
  • increased durability,
  • modern construction solutions,
  • small size to allow easier installation in tight engine sections,
  • rotating connections,
  • stable working parameters.


Design of STAG R01 reducers
With the use of unique design solutions, the single-stage, diaphragm-type STAG R01 with a heat exchange (water/gas), combines the benefits of two types of reducers:

  • single-stage: fast and efficient management of sudden temporary increase in the load,
  • two-stage: no risk of excessive pressure.

The unique design of the STAG R01 ensures sufficient performance in both low and high pressure gas inflow. Therefore, the unit is more resistant to pressure drops resulting from a reduced LPG level in the cylinder and fuel impurities than other marketed products.

The use of an innovative heat exchange system in the STAG R01 reducer, significantly minimizes the release of LPG impurities which cause “reducer plugging”.
In this respect, the STAG R01 is much better and more reliable than other competitive solutions.


Materials used for construction and technical specification

The STAG R01 reducer is made of aluminum alloy processed under strict chemical control and the manufacturing technology ensures:

  • tight casting up to 70 bar,
  • uniform formulation of casting to ensure high durability and resistance to mechanical damage

Technical specification of STAG R01

  180KM 250KM
Material 3 aluminium castings
(body and cover)
3 aluminium castings
(body and cover)
Weight Reducer – 1100 g
Complete kit – 1330 g
Reducer – 1100 g
Complete kit – 1330 g
Dimensions [mm] 146x141x111 146x141x111
Max. inlet pressure 3 MPa 3 MPa
Outlet pressure Adjustable
0.9–1.3 bar
0.9–1.3 bar
Solenoid valve power supply 12VDC 12VDC
Coil power 11W 11W
Solenoid valve Gniazdo AMP
Gniazdo AMP
Gas inlet diameter [mm] ∅ 6.0 Ml0x1 ∅ 8.0 Ml2x1
Gas outlet diameter [mm] ∅12 ∅16
Water outlet diameter [mm] ∅16 ∅16
Max. engine power 110kW/150KM 184kW / 250KM
Approval E4-67R-01 4619 E4-67R-01 4619
Vacuum pipe [mm] ∅4 ∅4


STAG AC R01 wymiary

 Leadflet STAG AC R01

 Approval E4-67R-01 4619

Mobile applications


Controllers LPG/CNG direct petrol injection

Controllers LPG/CNG - DIESEL


Injection rails LPG / CNG

Reducers LPG

Fuel injector emulator - Controllers LPG/CNG direct petrol injection

Fuel level emulator

Fuel pressure emulator


Switches petrol / gas

Fuel Level Indicators WPG

Timing Advance Processors

The pressure sensor





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