Crane 66307955884 Iron Stop Check Valve 6 in Class 250

Product Description

The CRANE 66307955884 is a 6-inch iron stop check valve designed for demanding industrial and commercial piping systems. Built to Class 250 pressure standards, this valve combines stop and check functions in a single body, allowing the operator to manually shut off flow while also preventing backflow when the valve is in the open position. The Y-pattern body design reduces flow restriction and pressure drop compared to standard globe-pattern configurations. A bolted bonnet provides a secure, serviceable seal for high-pressure service. Installation is typically performed by licensed pipefitters or plumbers working on larger-diameter process or utility lines.

This valve is suited for commercial and industrial applications where both flow shutoff control and backflow prevention are required in a single fitting. The flanged end connections make it compatible with standard Class 250 flange piping systems. Typical applications include boiler feed lines, pump discharge headers, steam and condensate systems, and other medium-to-high-pressure fluid handling installations where a combined stop-and-check function simplifies the piping layout.

Key Features

• Combined stop and check function in a single valve body reduces the need for separate check and isolation valves
• Y-pattern body minimizes pressure drop and flow turbulence compared to straight-through globe designs
• Class 250 pressure rating suitable for demanding commercial and industrial service
• Flanged end connections for secure, bolt-up installation on Class 250 piping systems
• Bolted bonnet design allows field servicing and internal inspection without removing the valve from the line
• Cast iron body construction suited for water, steam, and compatible fluid services

Compatibility

Designed as an OEM-style replacement or direct installation fitting for Class 250 flanged piping systems requiring a 6-inch iron stop check valve in a Y-pattern configuration.

Installation Notes

Installation should be performed by a licensed pipefitter or plumber in accordance with applicable mechanical codes, including ASME B31.1 or B31.9 as appropriate to the system. Isolate and depressurize the piping system completely before installing or servicing this valve. Verify flange bolt torque patterns follow standard cross-bolt sequencing per the flange gasket manufacturer's recommendations. Confirm flow direction arrow on the valve body is aligned with system flow direction before bolting into place.