Description
Mueller Steam Specialty™ Control Chek™ Control Check Valve, Triple Duty, Series: 721, 2-1/2 in Nominal, Flanged End Style, 200 psi CWP Pressure, 125 lb Pressure Class, 150 deg F, 8-7/8 in Inlet to Outlet Length, Cast Iron Body, 302/316 Stainless Steel/Aluminum Bronze Trim, Compressed Fiber/EPDM Softgoods, Import
Features:
- Disc is spring loaded to close the valve prior to flow reversal, protecting the pump and guarding against water hammer
- Disc opens at 0.25 psi
- Disc opens 1/3 in for each in of line size, allowing greater flow than similar products
- Disc is fully guided with external threaded stem
- Threaded stem allows flow adjustment from bubble tight shutoff to full flow
- Position indicator ensures accurate and repeatable balancing through disc positioning in throttling service
- Stem and yoke are external unwetted parts so are not subject to corrosion or erosion by line fluids
- Field servicing is easy and requires no special tools
- Bolted yoke cover with position indicator
- EPDM O-ring and compressed fiber packing
Applications:
Designed for Installation in Pump Discharge Piping where it Performs Triple Duty. It acts as a Spring Loaded Silent Check Valve, a Shutoff Valve and a Balancing Valve. Used in Conjunction with the Mueller Steam Specialty™ Suction Diffuser, it Constitutes a Compact and Effective Complete Pump Protection and Isolation Package
Standards/Approval:
- ASTM A126-B
- ASTM A126-B Gland Flange
- ASTM B148 C952 Disc
Warranty:
1 Year
