Fisher 2" Fnpt Relief Valve, 4 - 10 PSIG

SKU: 289H-4

289 Series relief valve is a throttling valve designed to protect piping downstream of a regulator from excessive pressure. They are usually installed after a large 2nd stage regulators and before the burner. They are ideal for low-pressure settings due to increased sensitivity provided by the large diaphragm area. Flow Capacity 312 SCMH. Type 289H-4 spring range 27kPa to 69kPa.