The function of the one-way valves is to allow the free flow of the oil in one direction and block it in the opposite direction. The VUN-BSPP series includes unidirectional connection valves with M/M threaded ports GAS-BSPP. Ball or poppet options are available for sealing. Depending on the chosen size, the valves of the VUN-BSPP series can be installed in systems with working pressures up to 500 bar (7250 PSI) and flow rates up to 90 lpm (23.8 gpm). The external body is made of high-strength steel and protected from corrosion by galvanizing. Calibrations other than standard and Zinc-Nickel surface treatment are available on request.