Emerson Fisher Type 289P Manuals

Type 289P D102680X012 Instruction Manual Form 5481 February 2009 www.emersonprocess.com/regulators Type 289P Pilot-Operated Relief Valve Introduction Scope of Manual This manual describes and provides instructions and parts lists for the Type 289P pilot-operated relief valve. Instructions and parts lists for any other Fisher® equipment used with this relief valve will be found in separate manuals. Product Description The Type 289P pilot-operated relief valve is used to provide protection from overpressuring a downstream system. This relief valve is suitable for service on natural gas, air, propane, or any other operating medium not corrosive to the internal parts. Smooth opening action minimizes system pressure surges during emergency action. Very little build-up over set pressure is required to completely open the main valve for maximum relief capacity. The external control line provides quick, accurate pressure registration. Specifications Some of the specifications for a given relief valve as it comes from the factory appear on the nameplate attached to the Type 289P main valve spring case. Other specifications appear on the Type 6358B or 6365 pilot spring case. Figure 1. NPS 1 Type 289P Pilot-Operated Relief Valve Figure 2. NPS 2 Type 289P Pilot-Operated Relief Valve W6834 W3167-2