Brass vacuum relief valves are replacement parts for vacuum tanks, vacuum trailers, storage tanks and other pressure vessels. Made with a durable brass Material, these vacuum relief valves connect with 1 1/2" NPT thread and are rated at a 370 CFM flow. They are non-code and cannot be used on tanks that store or haul corrosives, explosives or combustible materials. The functions of the valve have been specially studied to guarantee the complete safety of the product. A mechanical stop (12) regulates the valve opening in the position of maximum discharge. In case of accidental unscrewing of the nut that adjusts the spring because of the vibrations, a second stop (11) blocks mechanically the unscrewing and guarantees anyway a min. calibration of about -0,3 bar (-4 Psi). Furthermore it prevents the nuts from unscrewing completely and falling into the equipment's on which the valve is installed. For safety reasons, the diameter of the obturator (3) is larger than the discharge orifice, so that, in case of an accidental breaking of the stem, the obturator can't fall into the equipment's, on which the valve is installed. The valve can be easily adjusted to the desired pressure, after which the cap can be sealed tamper-proof through two practical drilled tongues.
Specifications
- Brand: RIV
- Series: Ambra
- Size: 1 1/2 in. NPT
- Connection: Male NPT
- Adjustable: Fully adjustable
- CFM: 370
- Material: Brass
- ISO 228/1, ANSI B1.20.1 (NPT)
