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Valve Standard Reference

MSS SP-80

Manufacturers

Bronze Gate, Globe, Angle and Check Valves

MSS SP-80 covers the design, manufacture, and testing requirements for bronze gate, globe, angle, and swing check valves intended for general utility service at moderate temperatures and pressures.

What is MSS SP-80?

MSS SP-80 (Bronze Gate, Globe, Angle and Check Valves) is an industrial valve standard issued by Manufacturers Standardization Society (MSS). Covers bronze screwed (threaded) and solder-end gate, globe, angle, and swing check valves in sizes NPS ¼" through NPS 3", rated ASME Class 125 (steam) or Class 250 (steam/water), intended for water, steam, compressed air, gas, and other non-corrosive services compatible with bronze wetted parts..

Issuing Body:
Manufacturers Standardization Society (MSS)
Category:
design

Overview - MSS SP-80

MSS SP-80 covers the design, manufacture, and testing requirements for bronze gate, globe, angle, and swing check valves intended for general utility service at moderate temperatures and pressures. These bronze valves - rated at ASME Class 125 (PN 16) or Class 250 (PN 40) - are widely used in building services, HVAC, potable water, steam heating, compressed air, and light industrial applications where the relatively low pressure and non-aggressive fluid allow use of the more economical bronze alloy. They are the most common valve type in building utilities and plumbing infrastructure.

Scope

Covers bronze screwed (threaded) and solder-end gate, globe, angle, and swing check valves in sizes NPS ¼" through NPS 3", rated ASME Class 125 (steam) or Class 250 (steam/water), intended for water, steam, compressed air, gas, and other non-corrosive services compatible with bronze wetted parts.

Vajra Industrial Solutions manufactures and supplies valves engineered to comply with MSS SP-80, each delivered with MSS SP-80 compliance marking (SP-80, class, and manufacturer logo) and Pressure class marking on valve body as standard.

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Share your requirements — we supply valves to MSS SP-80 with full certification documentation, quoted in 24 hours.

Applicable Valve Types

Bronze Gate Valves

Bronze Globe Valves

Bronze Angle Valves

Bronze Swing Check Valves

Applicable Pressure Classes

Class 125 (PN 16)Class 250 (PN 40)

Key Requirements - MSS SP-80

01.

Class 125: 200 psi non-shock water/air at ambient; 125 psi steam saturated

02.

Class 250: 500 psi non-shock water/air at ambient; 250 psi steam saturated

03.

Body material: ASTM B62 (85-5-5-5), B584 UNS C89833/C87600, or equivalent copper alloy

04.

Stem material: ASTM B99 (silicon bronze) or B371 (copper-zinc alloy) for gate valves

05.

Disc/wedge: suitable bronze alloy with Brinell hardness per class

06.

Packing: graphite, PTFE, or acceptable soft packing for temperature rating

07.

Wheel handwheel or T-bar handle standard; lever optional

08.

End connections: NPT threaded (ASME B1.20.1) or solder (ASME B16.18/B16.22)

Testing Requirements - MSS SP-80

Shell test: 2× working pressure, all valves, no leakage through body

Seat test: 1× working pressure, acceptable bubble rate per test criteria

Dimensional checks per MSS SP-80 tables for each valve type and size

Documentation Required for MSS SP-80 Compliance

MSS SP-80 compliance marking (SP-80, class, and manufacturer logo)

Pressure class marking on valve body

Material designation marking

Related Standards

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Part of the Vajra Valve Standards Library
Reviewed by Valve Standards Engineering, Vajra Industrial SolutionsDiscipline: Industrial Valve Standards & ComplianceLast reviewed: 20 June 2026

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