SQK ASME B16.34 Piston Valve

Full port forged steel isolation valves with a maximum operating pressure of 1973 psig/136 Barg and a maximum operating temperature of 800oF/427oC. The burnished piston and metal reinforced graphite rings provide leak-proof shut off and allow Piston Valves to be operated at higher temperatures, while also extending operating life.

Piston Valves are available in Socket Weld, BSPT, and NPT end connections. Flanged ends can be supplied upon request. Piston Valves are ideal for saturated and superheated steam, and hot water applications.

Piston Valves Feature :

• Leak-proof isolation
• Sizes from 1/2"/15mm to 1-1/2"/40mm
• Choice of socket weld or threaded connections
• Compatible with ASME
• Resistant to cavitation
• All sealing valve components may be easily replaced in-line
• Long-term operation. Piston valve design ensures actuation even after many years without operation
• Fire-proof performance

• ASME (B16.34, B16.5)
• Inspection and testing (API 598)
• Leak test (ANSI/FCI 70-2 )
• Fire test (API SPEC 6FA : 1999

Materials of Construction

• Body and Bonnet ASTM A105N / A350 LF2 Forged Steel
• Spindle SS T304
• Ring Valve SS T3016 + Graphite
• Piston SS 17-4 PH
• Spacer CA 40
• Belleville Washer ASTM A231
• Name Plate SS 304