CRANE globe valves

CRANE globe valves

CRANE globe valves are highly efficient for services requiring frequent operation and throttling when pressure drop across the valve is about 20% of inlet pressure.

Closer throttling, creating higher pressure drops may cause cavitation or excessive velocities which could cause high noise levels, vibration and possible damage to the valve or adjacent piping. Globe valves can be equipped with optional operators and are available with a variety of trims to match service requirements.

CRANE globe valves are supplied as standard with contour or spherical type plugs and are classified as quick opening on flow curves

Features & Benefits

• All seat rings are seal welded as standard
• Quality process fully documented, materials fully traceable
• Full range of special trims and options available

Typical Industries and Applications

• Energy – Power Production, Oil & Gas, Refining, District Heating
• Processing – Chemical Processing, Pulp & Paper, Food & Beverage, Petro Chemical
• Other Industries – Marine, Waste Water, Mining, OEM, others

Globe Valves

Globe valves are ideal for throttling service. Their flow characteristics permit accurate and repeatable flow control. However, caution must be exercised to avoid extremely close throttling when pressure drop exceeds 20%. This creates excessive noise, vibration and possible damage to valves and piping. Crane does not recommend applications in excess of this due to possible damage to the valve. Gear Actuators recommended for Globe valves:

• Class 150: sizes above 6″
• Class 300: sizes above 6″
• Class 600: sizes above 4″

Globe valves are designed to close off, open up or throttle the flow in a pipeline. The disc is designed to completely stop flow and form a tight seal with pressure under the disc. In the 10% open position to full open position, globe valves are effective in throttling line pressure. NOTE: Continuous throttling at less than 10% open may cause excessive vibration, noise, wear and damage to discs and seats.

OPERATION

Most valves, which are located in an accessible environment, are actuated by a manual handwheel mounted directly on top of the valve. When the valve size or differential pressure is so great that the handwheel size cannot keep the operating handwheel pull within customer reasonable limits, then a bevel gear should be mounted on the top-works. In addition, many customers require the remote operation or operating times that are not possible with manual handwheels, in this case, Electric Motor Actuators (EMO’s) can be used.

Figure

• Globe, Flanged

Size Range:

• 2 through 12 inches
• (50 – 300 mm)

Pressure Temperature Rating

• Carbon Steel
• ASTM A216 Grade WCB
• 285 psi -20°F to 100°F
• (20 bar -28°C to 37°C)

Data Sheet