Greiner - Microflow Ball Valve
Special Valve to verify Gas System Tightness - Made in Italy
Ball Valve with Two Pressure Points (PSP) for Direct Verification of Internal Gas System (UNI 7129) according to UNI 11137
The first PCP connection, in the direction of gas flow, is positioned in the central part of the valve body, upstream of the spherical shutter, while the second PCP connection, inclined at 30° to improve the operation in narrow niches, is positioned downstream of the spherical shutter.
The valve must be installed downstream of the measurement group, i.e. at the Start Point of the Internal System.
The valve can be supplied with a simple type sealable t-handle (art. 6582.64.00.100) if mounted in a single niche, or with the built-in safety lock (art. 6582.74.00.100) if, as required by current legislation, there is the presence of more meters/users in the same niche and therefore the risk of incorrect maneuvers.
This innovative ball valve, once closed like all the various valves of the various appliances (hob, boiler, etc.), allows you to create a BY-PASS between the two pressure ports mentioned and then measure, through the a special measuring instrument, inserted ad hoc and according to the procedures provided for in UNI 11137, any micro-flows, which are nothing more than micro-leaks or leaks from the internal gas system.
The valve thus meets the functional requirements of UNI 7129-1, in addition to those of the underlying product and relating to UNI-EN 331.
The connections are FF type 1” threaded according to UNI-EN 10226-1.
Greiner - Microflow Gas Tightness Test - Example Application
Greiner - Microflow Ball Valve - 65826400 - 1"
Greiner - Microflow Ball Valve with lock option - 65827400 - 1"
Sealing requirements of an internal system
System Tightness: "Suitable for operation"
(Commissioning or maintenance in service)
>1 dm3/h ≤5 dm3 / h
System Tightness: "Suitable for temporary operation"
(Maximum within 30 days from the date of the verification, restoration interventions must be carried out)
System Tightness: "Not suitable for operation"
(The system cannot continue to be operated and must be immediately taken out of service)