United Brass Works 900S Slow Opening Valve Set Overview
The United Brass Works 900S is a slow opening valve set with ball checks designed for water and steam boiler applications. The assembly is used as part of a boiler water gauge system, allowing operators to visually monitor water level while providing isolation and protective functions at the upper and lower gauge connections.
The Model 900S incorporates upper and lower valves with rising stems and internal ball checks. The ball checks are designed to help restrict the release of steam or water if the gauge glass is damaged or broken. United Brass Works includes the 900S among its boiler gauge fixture sets for steam boiler water-level monitoring applications. United Brass Works, Inc.
The United Brass Works 900S is rated for 300 WSP at temperatures up to 450°F and 600 WOG. The manufacturer also specifies that the assembly is 100% pressure tested and complies with ASME B31.1, Section I PG-60, and Appendix A-18 of the ASME Boiler Code. United Brass Works, Inc.
A key feature of the Model 900S is its slow opening design. This configuration allows controlled operation of the gauge valves and distinguishes it from the United Brass Works 900Q quick-opening version. Selection between slow-opening and quick-opening configurations should be based on the boiler installation requirements and the specifications of the gauge assembly.
The valve set uses durable metallic components appropriate for industrial boiler service. Manufacturer documentation for the 3/4-inch version specifies an ASTM B61 body, ASTM B21 stem, ASTM B16 bonnet, 302 stainless steel ball check, stainless steel packing washer, and a 300 WSP ball valve. United Brass Works, Inc.
The Model 900S is offered in 1/2-inch and 3/4-inch versions, providing options for different boiler gauge installations. United Brass Works lists both configurations within its boiler gauge fixture product family. United Brass Works, Inc.
Boiler gauge fixture sets provide a direct means of viewing boiler water level. Maintaining reliable water-level indication is important for proper operation of steam boiler equipment, and the gauge valves allow the gauge assembly to be isolated when inspection, cleaning, or maintenance is required.
The ball-check construction provides an additional protective feature within the gauge fixture assembly. If the gauge glass breaks, the ball checks are intended to help reduce leakage from the boiler connections. United Brass Works identifies stainless steel ball checks as part of the construction of its 900S gauge fixture sets. United Brass Works, Inc.
The United Brass Works 900S is intended for industrial water and steam service and should be selected according to the required connection size, pressure, temperature, and boiler system specifications. The manufacturer’s documentation states that the product contains lead and is not intended for potable water systems. United Brass Works, Inc.
For replacement boiler gauge valves, maintenance projects, or new installations, the Model 900S provides a slow-opening configuration designed specifically for boiler water-level gauge applications.
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