The GSR 52 series 2/2-way valve unit is constructed with a range of material components such as brass and stainless steel elements. An array of sealing solutions are also employed including nitrile butadiene rubber, ethylene propylene diene monomer, and polytetrafluoroethylene. G1 or 8 and G1 or 4 are used as its connecting device. This series works under maximum pressure rate of 300 bar.