The Wennstrom sampling valve is similar to a normal foot valve with an important exception: no loading is carried out through the valve. There are two versions; one is pneumatically controlled, the other is opened mechanically.
The valve is typically installed when regulations or standard require the taking of samples from the bottom of a tank, such as an aircraft refueling vehicle. It can also be used for draining a tank. The sampling valve comes in two versions, one pneumatically operated, the other mechanically operated for example a wire.
The valve are permanently marked with the following information:
-Manufacturer Wennstrom Flow Control AB
-Manufacturers art no: 16-3070 for the mechanical operated valve
-Materials Aluminum, EN AC-44200
-Max work pressure 10 bar
-Year of manufacture 20XX
-Unique serial number
-Conformity EN16257: Clause 4 and 5
-Temperature range -40° to +50° Celsius
-Gaskets NBR or FPM