Description
The relief valve type RV is a device to be installed on pipes or pressure vessels, which have the
task of maintaining the pressure in the circuit below a certain range, absorbing and discharging
outside small overpressure due to temporary events such as expansion of gas volume for
increasing of gas temperature or back pressure shocks. Tanks to high flow rate and the compact
design, these valves are ideal for civil and industrial users of natural gas, propane, butane, noncorrosive gases in general, and by a special execution for sewer gases as biogas. Installed
downstream of the pressure regulators they prevent the action of shut off valves not depending
from regulators damages or from overheating of the gas pipe with zero flow demand.
Product information
RV valve offer an easy installation and maintenance thanks to the possibility of inspection of the
obturator without disassembling the control head. They can be mounted in any position without
affecting its operation. They also have a high sensitivity of intervention. The principle of operation
of these devices is based on the contrast between the gas pressure under the diaphragm and the
calibration spring. When the gas pressure increases to exceed the setting value of the spring, the
shutter member is raised there by freeing a certain amount of gas. When the gas pressure
decreases lowering spring setting, the shutter member closes the valve seat under the sole gas
pressure to be controlled and not under the strenght of the spring. This system eliminates the
phenomena of bonding on the seat valve and preserves the same from damages by impairment,
providing longer life service.
Main features
• Low medium/high pressure versions
• High accuracy
• High flow rate
• Threaded and flanged connections DN 25×25
• Compact design
• Fast response
• Easy maintenance
• Long life service
• Special execution for sewer gases and biogas
• Standard type natural gas, LPG and no corrosive gas
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