United Brass Works 903 1/2″ High Pressure Lower Gauge Fixture Valve

United Brass Works 903 lower gauge fixture valve

Part #: 903
Model: 903
Manufacturer: United Brass Works
Category: Boiler Parts & Accessories
Key Specifications

Part Number: 903
Model: 903
Manufacturer: United Brass Works
Product Type: High Pressure Lower Gauge Fixture Valve
Nominal Size: 1/2″
Service: Water / Steam
Pressure Rating: 250 WSP @ 406°F
Operation: Rising Stem
Design: Offset
Safety Feature: 302 Stainless Steel Ball Check
Body Material: CDA 836 Bronze
Compliance: ASME B31.1
Boiler Code: ASME Section I, PG-60 Appendix A-18
CRN: OC07135.2C
Approx. Unit Weight: 2.8 lb

Overview

United Brass Works 903 1/2″ high-pressure lower gauge fixture valve with stainless-steel ball check, rated 250 WSP at 406°F for boiler water-level monitoring.

Technical Specifications
  • Product Type: Lower Gauge Fixture Valve
  • Model: 903
  • Nominal Size: 1/2″
  • Service: Water / Steam
  • Pressure Rating: 250 WSP @ 406°F
  • Operation: Rising Stem
  • Design: Offset
  • Body: CDA 836 Bronze
  • Ball Check: 302 Stainless Steel
  • O-Ring: EPDM
  • Union Tail Piece: CDA 360 Brass
  • Union Nut: CDA 922 Bronze
  • Stem: CDA 693
  • Bonnet: CDA 360 Brass
  • Packing: 33 NAFG
  • Packing Nut: CDA 360 Brass
  • Handwheel: Zinc
  • Marker Disc: Aluminum
  • Seal Washer: FKM
  • Rod Bracket: 300 Series Stainless Steel
  • Glass Nut: CDA 360 Brass
  • Lower Drain Valve: Model 380MXFSP, 1/2″
  • Compliance: ASME B31.1
  • Boiler Code Compliance: ASME Section I, PG-60 Appendix A-18
  • CRN: OC07135.2C
  • Approx. Unit Weight: 2.8 lb
  • Potable Water: Not intended for potable water systems

United Brass Works 903 High Pressure Lower Gauge Fixture Valve

The United Brass Works 903 High Pressure Lower Gauge Fixture Valve is a 1/2-inch lower boiler gauge valve designed for water-level monitoring in steam boiler and industrial sight-glass applications. The valve incorporates a stainless-steel ball check that helps restrict flow automatically if the gauge glass is damaged.

Rated for 250 WSP at temperatures up to 406°F, the Model 903 features rising-stem operation and an offset design for dependable boiler service. It complies with ASME B31.1 and ASME Boiler Code Section I, PG-60 Appendix A-18. The 903 is commonly paired with the Model 902 upper gauge fixture valve and is also used as part of the United Brass Works Model 34041 high-pressure boiler gauge fixture set.

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