Crestline Seismic Specification

Crestline Piping Specification / Victaulic Installation Guide

EPDM gaskets are the correct choice for this application. The service temperature of 200°F falls well within the EPDM rating of -30°F to +250°F. EPDM is the standard gasket material for HVAC hydronic systems because of its excellent temperature range, water resistance, and long service life. For systems operating above 250°F (such as high-pressure steam), silicone or other high-temperature gasket materials would be required. The 60 PSI operating pressure is well within grooved coupling pressure ratings.

Crestline Plumbing Specification (gear operators required on 6 in. and larger)

Butterfly valves 6 inches and larger must be equipped with a gear operator, not a lever handle. Lever handles on large valves allow rapid closure that causes water hammer, and they cannot provide the fine control needed for balancing. Gear operators also prevent unauthorized operation.

Crestline Plumbing Specification / ASME B16.34

Valves must be rated to exceed the maximum operating pressure by at least 50% per Crestline specifications. A 100 psi rated valve on a 125 psi system is under-rated and risks catastrophic valve body failure. A minimum 200 psi rated valve (Class 150) is required.

Crestline Valve Specification

The system operating pressure of 130 PSI exceeds the valve's 125 PSI maximum working pressure rating. Even though the difference is only 5 PSI, operating a valve above its rated pressure violates the specification and creates a safety hazard. The valve body, bonnet gasket, and packing are designed for the rated pressure with appropriate safety margins. At 130 PSI, those safety margins are compromised. The plumber needs to either: (1) select higher-rated valves (e.g., 150 or 200 PSI class), (2) verify with the engineer that 125 PSI valves are acceptable with a pressure-reducing station upstream, or (3) use ball valves rated at 600 PSI for sizes 2 inches and under.

Crestline Valve Specification / AWWA C504

Butterfly valves 6 inches and larger require gear operators, not lever handles. An 8-inch butterfly valve with a lever handle is a code violation for two reasons. First, the specification explicitly requires gear operators for valves 2.5 to 12 inches, with gear operators mandatory at 6 inches and above. Second, the torque required to operate an 8-inch butterfly valve against system pressure is too high for safe one-handed lever operation — especially at 7 feet above the floor where an operator would be reaching overhead. Gear operators provide controlled, gradual valve operation that prevents water hammer from rapid closure.

Crestline Valve Specification / MSS SP-110

These ball valves meet all specification requirements for 2-inch and smaller service. The 600 PSI rating meets the requirement for ball valves 2 inches and smaller. Full-port design ensures minimal pressure drop and allows full flow capacity — a reduced port valve would restrict flow and create an unacceptable pressure drop. The PTFE (Teflon) seat material provides excellent chemical resistance, low friction, and is compatible with chilled water temperatures. The 600 PSI rating at 42°F operating temperature provides substantial safety margin over the 125 PSI system pressure.