Wesman offers a complete portfolio of Controls and Accessories for its oil and gas fired combustion systems.


The Burner Management System is a control unit for supervision of single / multiple burners on an installation with a choice of automatic or manual start and UV or flame rod flame failure monitoring systems. It can be designed with relay logic or PLC with operator interface. The system can be programmed for sequential start and shut down of the burners, along with controlling the temperature, pressure and other process parameters. Our systems are built with safety interlocks conforming to international standards, along with alarms and data logging as required.



Sensomatic Oil Valves is a tight shut-off valve with precision V-oil port for micro-metering and uniform flow of oil through-out the 180 degree sweep of the control handle. Sensomatic Oil Valves are tight shut-off valves that prevent dribbling of oil into the burners during shut-down. It also allows shutting off the burner without disturbing the Sensomatic Oil Valve's limiting orifice setting. Sensomatic Oil Valve are available in 6 sizes depending on the oil flow requirements.


Limiting Orifice Gas Valves regulate the flow of gas to the burner. Limiting Orifice Valves are installed upstream of nozzle mix gas burners for adjusting air / gas ratio. A V-port plug is adjusted to increase or decrease the flow of gas. Limiting Orifice valves are not designed for turning off gas for which suitable shut-off valves are to be installed in the upstream.


Ratiomatic Oil Valves are used for automatic proportioning of oil and air flow. Ratiomatic Oil Valves maintain the balance between fuel and combustion air for complete combustion in the burners. It is used to control burners from high-fire to low-fire and vise versa i.e., as combustion air is turned up or down, the Ratiomatic Oil Valve controls the oil flow in proportion. Ratiomatic Oil Valves are available in two sizes.


Air-Gas Ratio Regulators give constant air / gas ratio at all firing rates. It is used over a wide range of firing rates both in premix and nozzle mix gas burner systems. In case of Premix burners, the vent is open to the atmosphere. The regulator can be used as an atmospheric regulator i.e. Zero governor and supply the gas to the premix burner. In case of nozzle mix burners, the vent of the regulator is cross connected to the main air line downstream of the control valve. In this case, the regulator outlet pressure is equal to the air impulse pressure and the gas remains proportional to the air flow at all firing rates. In premix burners and nozzle mix burners, a separate regulator for each burner is preferred to achieve optimal performance.

ADJUSTABLE PORT VALVE (For oil and gas burner systems)

Adjustable Port Valves are precision built and ideal for automatic control of fuel / air flow to meet control requirements. As these valves are meant for control purposes only, they should not be used as shut-off valves. Adjustable Port Valves are generally used in auto-controlling systems of furnace temperature. It controls fuel or air on the basis of signals given by its controlling modulating motor.


Metering Orifice System is used for measuring gas flow to individual burners so they have balancing burner inputs. Metering orifice systems are installed in the individual burner gas lines to expedite adjustment of air / fuel ratio. It also allows for easy checking of operation from time-to-time while the burners are firing.



UV Flame sensor gives the signal of the presence or absence of a flame or UV light. The Flame Detector Relays / Flame switches used with appropriate sensors energize the UV photo-tubes absence of the flame, Flame-ON relay is de-energized and shuts–off the fuel solenoid valves as a safety measure to prevent unsafe conditions.


Flame rods have the same function as the UV Flame Sensor and are required for the safety of the combustion system against sudden power failure or any other cause for flame failure.

Flame Rods are energized by Flame switches with alternating voltage. When the rod comes in contact with the Flame then the alternating voltage passing through the rod is rectified by the flame to a small DC Current which can be amplified and checked by flame switches to confirm the presence of a flame by energising the Flame-ON relay. As a result the fuel solenoid valve is energized and fuel flow takes place. In the absence of the flame, the Flame-ON relay is de-energized and shuts-off the fuel solenoid valves preventing further fuel flow.


Wesman manufactures its own range of Butterfly valves that are used for manual / motorized input control and for balancing of burner firing rates. Butterfly valves are used to control the air required in the burner inlet for complete combustion. Butterfly valves should be the same pipe size as the equipment in the line they are serving in order to give a negligible pressure drop when the butterfly valve is fully open.