Flanges Set - 26841 (Centering Ring, DN 63 ISO-K Al, FPM) - 3 pieces. Set of mounts - 26701 Clamps, DN63-250 ISO-K, 19-27 mm, 4 pcs. These solenoid right-angle valves were specially developed for usewith rotary vacuum pumps which are not equipp ed with a built-in anti-suckback valve. The SECUVAC safety valve protects the vacuum system againstunplanned vent ing via the backing pump in case of powerfailure and it ensures that the vacuum system remains sealed until the backing pump, after it has restart ed, has evacuated the connecting lines. The cardboard box is slightly dented and has inscriptions (in ballpoint pen). The upper part of the soft packaging (such as foam) is missing. This item is in the category "Business & Industrial\Hydraulics, Pneumatics, Pumps & Plumbing\Pumps & Pump Accessories\Vacuum Pumps\Turbomolecular Pumps". The seller is "tubesrsd" and is located in this country: RU. This item can be shipped worldwide.