This document describes an exclusive and patented mechanical LPG liquid control valve from Pegoraro Gas Technologies. The valve regulates LPG vaporization without needing electricity, compressors, or float valves. It works by closing a shutter when the temperature of water leaving a heat exchanger drops below 50-55°C, preventing liquid LPG from entering the gas distribution system. This simple, safe, and low-maintenance design provides an alternative to solenoid or pneumatic valves for vaporizing LPG.

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LPG LIQUID CONTROL VALVE
MECHANICAL OPERATION

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REASONS WHY OUR LPG VAPORIZERS ARE EXCLUSIVE AND INNOVATIVE
Actually most of countries have norms to use safety devices to avoid LPG liquid phase in grid
distribution.
Normally the solution is to use solenoid or pneumatic valves:
 solenoid valve have to be Eexd certified, they need specific plant and electric switchboard;
 pneumatic valve need air compressor and specific plant
OUR LPG VAPORIZERS DON’T NEED ALL OF THIS

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Most of our competitors produce lpg vaporizers with a gas chamber built-in that can be filled by
LPG in LIQUID phase: a float valve is necessary to avoid LPG liquid phase in grid distribution
OUR LPG VAPORIZERS DON’T NEED ALL OF THIS

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All our lpg vaporizers have installed an
EXCLUSIVE and PATENTED
CONTROL REGULATION VALVE
TOTALLY MECHANICAL
The flow of gas happens by our patented control regulation valve, mounted at the inlet of the
vaporizer (liquid phase)

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It works on the basic concept that, reaching a certain temperature, the LPG enters a gaseous state.
The liquid LPG:
 coming from the tank
 enters into the valve
 passes through the filter
 comes to the shutter which is closed.
If the temperature of the water leaving the exchanger is recorded as being > 50-55°C, the
expansion of the bellows will make the shutter open and let the gas enter into the heat exchanger.
As the user’s requirements vary so does the temperature of the water and consequently also the
opening of the shutter.

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If the need for gas should exceed the heat exchanger’s rating:
 the temperature of the water leaving the exchanger will fall
 the bellows will make the shutter close to reach an equilibrium “GAS FLOW = HEAT
REQUIRED”
This system excludes any possibility of taking up gas in a state close to its re-liquefying.
If the requirement for gas was nil and the water temperature remained within the values which
would ensure evaporation, the pressure within the heat exchanger would increase and push the
gas towards the tank, bringing the system back into equilibrium.

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OUR TECHNOLOGY COST SAVING

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ADVANTAGES OF OUR LPG VAPORIZERS
GENERAL
• certified by relevant third party
• 100% Made in Italy
• wide range of capacity
• simple and easy-to-conduct equipment
• some electrical preheated models can be shifted to boiler fed version
SAFETY
• control valve does not require electrical power supply
• control valve is normally closed: it stops the gas in case of failure
• control valve is equipped with rubber shutter that closes against a metallic seat: this
solution assures perfect sealing without leakage. Other manufacturers use instead a
metallic coupling which requires to be maintained clean
• control valve does not need manual reset
• control valve is installed external from the vaporizer: this allows maintenance or eventual
replacement
• in case of failure, no liquid LPG can be trapped inside the vaporizer. Avoids dangerous
overpressure
WORKING MAINTENANCE
• quick installations: control system does not require any electrical or pneumatic supply
• “onlyoneunit” versions available, with the whole equipments already mounted, wired up
and tested
• instruments and electrical heater are separately replaceable
• low maintenance and cheap spare parts
• pull-out nest of tube for allowing maintenance (Vapeg model)

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Realized by
PEGORARO GAS TECHNOLOGIES Srl
Registered office: Via E. Fermi n. 253 – 36100 VICENZA (TALY)
Main office: Via della Tecnica n. 28 – 36100 VICENZA (TALY)
Phone +39 0444 289382
Fax +39 0444 963056
www.pegorarogas.com
info@pegoraro.it
Please send your request of quotation to:
export@pegoraro.it