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Piston Valves

Product catalog summary

Description: Armstrong Piston Valves are full port forged steel isolation valves designed for high-pressure and high-temperature applications, with a maximum operating pressure of 136 Barg/1973 psig and a maximum temperature of 427°C/800°F. They feature burnished pistons and metal-reinforced graphite rings for leak-proof shut-off and extended operational life. These valves are suitable for saturated and superheated steam, and hot water applications.

Features:

Leak-proof isolation
Available in sizes from 15mm/1/2” NB to 40mm/1-1/2” NB
End connections include socket weld, BSPT, NPT, and optional flanged ends
Compliance with API, ASME, IBR, and DIN standards
Resistance to cavitation
In-line replaceable sealing components
Fire-proof performance

Design Features: The valves incorporate flexible graphite reinforced ring stacks, precision burnished stainless steel pistons, and a fully enclosed piston stem to prevent dirt and corrosion. The ductile iron handwheel and four-bolt mechanism with Belleville washers ensure ease of operation and reliability in high-temperature conditions.

Material and Standards:

Body: Forged Steel (ASTM A105, ASTM A350 LF2)
Graphite Ring Stack: Flexible Graphite and SS 316
Design Standards: ASME (B16.34, B16.10, B16.5), API (600, 602), IBR 1950, DIN (3202, 10226-1)
Testing: API 598, ANSI/FCI 70-2, API SPEC 6FA: 1999

Specifications: The valves are available in ANSI Class 800 with various dimensions and weights for different sizes (15, 20, 25, 40NB). They are designed for socket weld ends with specific pressure and temperature ratings.

Conclusion: Armstrong Piston Valves offer robust and reliable solutions for high-pressure and high-temperature applications, ensuring efficient utility performance and reduced environmental impact.

Catalog excerpts

Armstrong Piston Valves The Ideal Isolation Valve

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Armstrong Piston Valves Description Armstrong Piston Valves are full port forged steel isolation valves with a maximum operating pressure of 136 Barg/1973 psig and a maximum operating temperature of 427°C/800°F. The burnished piston and metal reinforced graphite rings provide leak-proof shut off and allow Armstrong Piston Valves to be operated at higher temperatures, while also extending operating life. Armstrong Piston Valves are available in Socket Weld, BSPT, and NPT end connections. Flanged ends can be supplied upon request. Armstrong Piston Valves are ideal for saturated and superheated...

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Armstrong Piston Valves Nylock Nut Plain Washer Name Plate M10 Bolt Belleville Washer Graphite-SS Stacks Spacer Lantern Bush L Forged Piston Valves ANSI Class 800 (API602 & ASME B16.34) NB/DN Body Material Minimum Thread Bolting Type Design Features Forged Steel Piston Valves Class 800 (Sizes 15, 20, 25, 40NB) End Connections * Maximum Pressure at Temperature Maximum Temperature at Operating Pressure barg Socketweld ends Hydro Test Pressure at Ambient Temperature 204.30 * Other end connections may have restricted pressure and temperature ratings due to applicable standards. Design features of...

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Armstrong provides intelligent system solutions that improve utility performance, lower energy consumption, and reduce environmental emissions while providing an “enjoyable experience.” Armstrong International North America • Latin America • India • Europe / Middle East / Africa • China • Pacific Rim armstronginternational.in Bulletin 191 6/12 © 2012 Armstrong International, Inc.

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Piston Valves

Piston Valves

Catalog excerpts

All Armstrong International, Inc. catalogs and technical brochures